Temperature map
A hard frost has now taken place in the following counties: Barnstable (western half), Berkshire, Bristol, Essex, Franklin, Hampden, Hampshire, Middlesex, Norfolk, Plymouth , Suffolk and Worcester.
Map provided courtesy of NOAA, Northeast Regional Climate Center at Cornell University. This map shows the lowest temperature reached since July 1, 2019 and is intended to assist communities in determining when a hard frost is likely to have occurred. When temperatures between 27-29 degrees Fahrenheit have occurred over wide geographic areas, risk from mosquito-borne disease is considered to have ended inside that area. Areas that have had temperatures between 29-33 degrees Fahrenheit may still have some remaining risk from mosquito-borne disease and communities should continue to exercise judgement in rescheduling outdoor, evening activities.
EEE risk map
View full size image of EEE risk map
Learn what your city or town's risk level means:
Key to Color Coding on EEE Risk Map | (Accessible version)
WNV risk map
View full size image of WNV risk map
Learn what your city or town's risk level means:
Key to Color Coding on WNV Risk Map | (Accessible version)
EEE and WNV risk level by city/town
| County Name | City/Town Name | EEE Risk Level | WNV Risk Level |
|---|---|---|---|
| Plymouth | Abington | Moderate | Low |
| Middlesex | Acton | Moderate | Low |
| Bristol | Acushnet | Critical | Low |
| Berkshire | Adams | Low | Low |
| Hampden | Agawam | High | Low |
| Berkshire | Alford | Low | Low |
| Essex | Amesbury | Moderate | Low |
| Hampshire | Amherst | Moderate | Low |
| Essex | Andover | High | Low |
| Dukes | Aquinnah | Remote | Low |
| Middlesex | Arlington | Low | Moderate |
| Worcester | Ashburnham | Low | Low |
| Middlesex | Ashby | Low | Low |
| Franklin | Ashfield | Low | Low |
| Middlesex | Ashland | Critical | Low |
| Worcester | Athol | Moderate | Low |
| Bristol | Attleboro | High | Low |
| Worcester | Auburn | High | Low |
| Norfolk | Avon | Moderate | Low |
| Middlesex | Ayer | Low | Low |
| Barnstable | Barnstable | Low | Low |
| Worcester | Barre | Moderate | Low |
| Berkshire | Becket | Low | Low |
| Middlesex | Bedford | Moderate | Low |
| Hampshire | Belchertown | Moderate | Low |
| Norfolk | Bellingham | High | Low |
| Middlesex | Belmont | Low | Moderate |
| Bristol | Berkley | High | Low |
| Worcester | Berlin | High | Low |
| Franklin | Bernardston | Moderate | Low |
| Essex | Beverly | Moderate | Low |
| Middlesex | Billerica | Moderate | Low |
| Worcester | Blackstone | High | Low |
| Hampden | Blandford | Low | Low |
| Worcester | Bolton | Moderate | Low |
| Suffolk | Boston | Low | Moderate |
| Barnstable | Bourne | Moderate | Low |
| Middlesex | Boxborough | Low | Low |
| Essex | Boxford | Moderate | Low |
| Worcester | Boylston | High | Low |
| Norfolk | Braintree | Moderate | Low |
| Barnstable | Brewster | Low | Low |
| Plymouth | Bridgewater | High | Moderate |
| Hampden | Brimfield | High | Low |
| Plymouth | Brockton | Moderate | Low |
| Worcester | Brookfield | Critical | Low |
| Norfolk | Brookline | Low | Moderate |
| Franklin | Buckland | Low | Low |
| Middlesex | Burlington | Low | Low |
| Middlesex | Cambridge | Low | Moderate |
| Norfolk | Canton | Moderate | Low |
| Middlesex | Carlisle | Moderate | Low |
| Plymouth | Carver | Critical | Moderate |
| Franklin | Charlemont | Moderate | Low |
| Worcester | Charlton | High | Low |
| Barnstable | Chatham | Low | Low |
| Middlesex | Chelmsford | Low | Low |
| Suffolk | Chelsea | Low | Low |
| Berkshire | Cheshire | Low | Low |
| Hampden | Chester | Low | Low |
| Hampshire | Chesterfield | Low | Low |
| Hampden | Chicopee | Moderate | Low |
| Dukes | Chilmark | Remote | Low |
| Berkshire | Clarksburg | Low | Low |
| Worcester | Clinton | Moderate | Low |
| Norfolk | Cohasset | Moderate | Low |
| Franklin | Colrain | Critical | Low |
| Middlesex | Concord | Moderate | Low |
| Franklin | Conway | Low | Low |
| Hampshire | Cummington | Low | Low |
| Berkshire | Dalton | Low | Low |
| Essex | Danvers | Moderate | Low |
| Bristol | Dartmouth | Moderate | Low |
| Norfolk | Dedham | Low | Low |
| Franklin | Deerfield | Low | Low |
| Barnstable | Dennis | Low | Low |
| Bristol | Dighton | High | Low |
| Worcester | Douglas | Critical | Low |
| Norfolk | Dover | Moderate | Low |
| Middlesex | Dracut | Moderate | Low |
| Worcester | Dudley | High | Low |
| Middlesex | Dunstable | Low | Low |
| Plymouth | Duxbury | Moderate | Low |
| Plymouth | East Bridgewater | High | Low |
| Worcester | East Brookfield | High | Low |
| Hampden | East Longmeadow | High | Low |
| Barnstable | Eastham | Low | Low |
| Hampshire | Easthampton | Low | Low |
| Bristol | Easton | Critical | Low |
| Dukes | Edgartown | Remote | Low |
| Berkshire | Egremont | Low | Low |
| Franklin | Erving | Low | Low |
| Essex | Essex | Low | Low |
| Middlesex | Everett | Low | Low |
| Bristol | Fairhaven | High | Low |
| Bristol | Fall River | Moderate | Low |
| Barnstable | Falmouth | Moderate | Low |
| Worcester | Fitchburg | Low | Low |
| Berkshire | Florida | Low | Low |
| Norfolk | Foxborough | Moderate | Low |
| Middlesex | Framingham | Critical | Low |
| Norfolk | Franklin | Moderate | Low |
| Bristol | Freetown | Critical | Low |
| Worcester | Gardner | Moderate | Low |
| Essex | Georgetown | Moderate | Low |
| Franklin | Gill | Low | Low |
| Essex | Gloucester | Low | Low |
| Hampshire | Goshen | Low | Low |
| Dukes | Gosnold | Remote | Low |
| Worcester | Grafton | Critical | Low |
| Hampshire | Granby | Moderate | Low |
| Hampden | Granville | Moderate | Low |
| Berkshire | Great Barrington | Low | Low |
| Franklin | Greenfield | Low | Low |
| Middlesex | Groton | Low | Low |
| Essex | Groveland | Moderate | Low |
| Hampshire | Hadley | Moderate | Low |
| Plymouth | Halifax | High | Moderate |
| Essex | Hamilton | Moderate | Low |
| Hampden | Hampden | Moderate | Low |
| Berkshire | Hancock | Low | Low |
| Plymouth | Hanover | Moderate | Low |
| Plymouth | Hanson | Moderate | Low |
| Worcester | Hardwick | Moderate | Low |
| Worcester | Harvard | Moderate | Low |
| Barnstable | Harwich | Low | Low |
| Hampshire | Hatfield | Low | Low |
| Essex | Haverhill | Moderate | Low |
| Franklin | Hawley | Low | Low |
| Franklin | Heath | Critical | Low |
| Plymouth | Hingham | Moderate | Low |
| Berkshire | Hinsdale | Low | Low |
| Norfolk | Holbrook | Moderate | Low |
| Worcester | Holden | Moderate | Low |
| Hampden | Holland | Moderate | Low |
| Middlesex | Holliston | Critical | Low |
| Hampden | Holyoke | Moderate | Low |
| Worcester | Hopedale | Critical | Low |
| Middlesex | Hopkinton | Critical | Low |
| Worcester | Hubbardston | Moderate | Low |
| Middlesex | Hudson | High | Low |
| Plymouth | Hull | Low | Low |
| Hampshire | Huntington | Low | Low |
| Essex | Ipswich | High | Low |
| Plymouth | Kingston | Moderate | Moderate |
| Plymouth | Lakeville | Critical | Low |
| Worcester | Lancaster | Moderate | Low |
| Berkshire | Lanesborough | Low | Low |
| Essex | Lawrence | High | Low |
| Berkshire | Lee | Low | Low |
| Worcester | Leicester | High | Low |
| Berkshire | Lenox | Low | Low |
| Worcester | Leominster | Moderate | Low |
| Franklin | Leverett | Low | Low |
| Middlesex | Lexington | Low | Low |
| Franklin | Leyden | Moderate | Low |
| Middlesex | Lincoln | Moderate | Low |
| Middlesex | Littleton | Low | Low |
| Hampden | Longmeadow | High | Low |
| Middlesex | Lowell | Low | Low |
| Hampden | Ludlow | Moderate | Low |
| Worcester | Lunenburg | Low | Low |
| Essex | Lynn | Low | Low |
| Essex | Lynnfield | Low | Low |
| Middlesex | Malden | Low | Low |
| Essex | Manchester | Moderate | Low |
| Bristol | Mansfield | Moderate | Low |
| Essex | Marblehead | Low | Low |
| Plymouth | Marion | Critical | Low |
| Middlesex | Marlborough | Critical | Low |
| Plymouth | Marshfield | Moderate | Low |
| Barnstable | Mashpee | Low | Low |
| Plymouth | Mattapoisett | High | Low |
| Middlesex | Maynard | High | Low |
| Norfolk | Medfield | Critical | Low |
| Middlesex | Medford | Low | Low |
| Norfolk | Medway | High | Low |
| Middlesex | Melrose | Low | Low |
| Worcester | Mendon | Critical | Low |
| Essex | Merrimac | Moderate | Low |
| Essex | Methuen | Critical | Low |
| Plymouth | Middleborough | Critical | Moderate |
| Hampshire | Middlefield | Low | Low |
| Essex | Middleton | Moderate | Low |
| Worcester | Milford | Critical | Low |
| Worcester | Millbury | High | Low |
| Norfolk | Millis | High | Low |
| Worcester | Millville | High | Low |
| Norfolk | Milton | Low | Low |
| Franklin | Monroe | Low | Low |
| Hampden | Monson | Moderate | Low |
| Franklin | Montague | Low | Low |
| Berkshire | Monterey | Low | Low |
| Hampden | Montgomery | Moderate | Low |
| Berkshire | Mount Washington | Low | Low |
| Essex | Nahant | Low | Low |
| Nantucket | Nantucket | Remote | Low |
| Middlesex | Natick | Moderate | Low |
| Norfolk | Needham | Low | Low |
| Berkshire | New Ashford | Low | Low |
| Bristol | New Bedford | Critical | Low |
| Worcester | New Braintree | Moderate | Low |
| Berkshire | New Marlborough | Low | Low |
| Franklin | New Salem | Moderate | Low |
| Essex | Newbury | Moderate | Low |
| Essex | Newburyport | Moderate | Low |
| Middlesex | Newton | Low | Moderate |
| Norfolk | Norfolk | Moderate | Low |
| Berkshire | North Adams | Low | Low |
| Essex | North Andover | Moderate | Low |
| Bristol | North Attleborough | Moderate | Low |
| Worcester | North Brookfield | High | Low |
| Middlesex | North Reading | Low | Low |
| Hampshire | Northampton | Low | Low |
| Worcester | Northborough | Critical | Low |
| Worcester | Northbridge | Critical | Low |
| Franklin | Northfield | Low | Low |
| Bristol | Norton | Critical | Low |
| Plymouth | Norwell | Moderate | Low |
| Norfolk | Norwood | Moderate | Low |
| Dukes | Oak Bluffs | Remote | Low |
| Worcester | Oakham | Moderate | Low |
| Franklin | Orange | Moderate | Low |
| Barnstable | Orleans | Low | Low |
| Berkshire | Otis | Low | Low |
| Worcester | Oxford | High | Low |
| Hampden | Palmer | Moderate | Low |
| Worcester | Paxton | Moderate | Low |
| Essex | Peabody | Low | Low |
| Hampshire | Pelham | Moderate | Low |
| Plymouth | Pembroke | Moderate | Low |
| Middlesex | Pepperell | Low | Low |
| Berkshire | Peru | Low | Low |
| Worcester | Petersham | Moderate | Low |
| Worcester | Phillipston | Moderate | Low |
| Berkshire | Pittsfield | Low | Low |
| Hampshire | Plainfield | Low | Low |
| Norfolk | Plainville | Moderate | Low |
| Plymouth | Plymouth | Moderate | Low |
| Plymouth | Plympton | High | Moderate |
| Worcester | Princeton | Moderate | Low |
| Barnstable | Provincetown | Low | Low |
| Norfolk | Quincy | Low | Low |
| Norfolk | Randolph | Moderate | Low |
| Bristol | Raynham | Critical | Low |
| Middlesex | Reading | Low | Low |
| Bristol | Rehoboth | High | Low |
| Suffolk | Revere | Low | Low |
| Berkshire | Richmond | Low | Low |
| Plymouth | Rochester | Critical | Low |
| Plymouth | Rockland | Moderate | Low |
| Essex | Rockport | Low | Low |
| Franklin | Rowe | Moderate | Low |
| Essex | Rowley | Moderate | Low |
| Worcester | Royalston | Low | Low |
| Hampden | Russell | Moderate | Low |
| Worcester | Rutland | Moderate | Low |
| Essex | Salem | Low | Low |
| Essex | Salisbury | Moderate | Low |
| Berkshire | Sandisfield | Low | Low |
| Barnstable | Sandwich | Low | Low |
| Essex | Saugus | Low | Low |
| Berkshire | Savoy | Low | Low |
| Plymouth | Scituate | Moderate | Low |
| Bristol | Seekonk | Moderate | Low |
| Norfolk | Sharon | Moderate | Low |
| Berkshire | Sheffield | Low | Low |
| Franklin | Shelburne | Moderate | Low |
| Middlesex | Sherborn | High | Low |
| Middlesex | Shirley | Moderate | Low |
| Worcester | Shrewsbury | Critical | Low |
| Franklin | Shutesbury | Low | Low |
| Bristol | Somerset | Moderate | Low |
| Middlesex | Somerville | Low | Moderate |
| Hampshire | South Hadley | Moderate | Low |
| Hampshire | Southampton | Moderate | Low |
| Worcester | Southborough | Critical | Low |
| Worcester | Southbridge | High | Low |
| Hampden | Southwick | High | Low |
| Worcester | Spencer | High | Low |
| Hampden | Springfield | High | Low |
| Worcester | Sterling | Moderate | Low |
| Berkshire | Stockbridge | Low | Low |
| Middlesex | Stoneham | Low | Low |
| Norfolk | Stoughton | Moderate | Low |
| Middlesex | Stow | High | Low |
| Worcester | Sturbridge | High | Low |
| Middlesex | Sudbury | Critical | Low |
| Franklin | Sunderland | Low | Low |
| Worcester | Sutton | High | Low |
| Essex | Swampscott | Low | Low |
| Bristol | Swansea | Moderate | Low |
| Bristol | Taunton | High | Low |
| Worcester | Templeton | Moderate | Low |
| Middlesex | Tewksbury | Moderate | Low |
| Dukes | Tisbury | Remote | Low |
| Hampden | Tolland | Low | Low |
| Essex | Topsfield | High | Low |
| Middlesex | Townsend | Low | Low |
| Barnstable | Truro | Moderate | Low |
| Middlesex | Tyngsborough | Low | Low |
| Berkshire | Tyringham | Low | Low |
| Worcester | Upton | Critical | Low |
| Worcester | Uxbridge | Critical | Low |
| Middlesex | Wakefield | Low | Low |
| Hampden | Wales | Moderate | Low |
| Norfolk | Walpole | High | Low |
| Middlesex | Waltham | Low | Low |
| Hampshire | Ware | Moderate | Low |
| Plymouth | Wareham | Critical | Low |
| Worcester | Warren | High | Low |
| Franklin | Warwick | Low | Low |
| Berkshire | Washington | Low | Low |
| Middlesex | Watertown | Low | Moderate |
| Middlesex | Wayland | High | Low |
| Worcester | Webster | High | Low |
| Norfolk | Wellesley | Low | Low |
| Barnstable | Wellfleet | Moderate | Low |
| Franklin | Wendell | Low | Low |
| Essex | Wenham | Moderate | Low |
| Worcester | West Boylston | Moderate | Low |
| Plymouth | West Bridgewater | High | Low |
| Worcester | West Brookfield | High | Low |
| Essex | West Newbury | Moderate | Low |
| Hampden | West Springfield | High | Low |
| Berkshire | West Stockbridge | Low | Low |
| Dukes | West Tisbury | Remote | Low |
| Worcester | Westborough | Critical | Low |
| Hampden | Westfield | High | Low |
| Middlesex | Westford | Low | Low |
| Hampshire | Westhampton | Low | Low |
| Worcester | Westminster | Moderate | Low |
| Middlesex | Weston | Moderate | Low |
| Bristol | Westport | Moderate | Low |
| Norfolk | Westwood | Moderate | Low |
| Norfolk | Weymouth | Moderate | Low |
| Franklin | Whately | Low | Low |
| Plymouth | Whitman | High | Low |
| Hampden | Wilbraham | Moderate | Low |
| Hampshire | Williamsburg | Low | Low |
| Berkshire | Williamstown | Low | Low |
| Middlesex | Wilmington | Low | Low |
| Worcester | Winchendon | Low | Low |
| Middlesex | Winchester | Low | Low |
| Berkshire | Windsor | Low | Low |
| Suffolk | Winthrop | Low | Low |
| Middlesex | Woburn | Low | Low |
| Worcester | Worcester | Moderate | Moderate |
| Hampshire | Worthington | Low | Low |
| Norfolk | Wrentham | Moderate | Low |
| Barnstable | Yarmouth | Low | Low |
Arbovirus results summary
| Mosquito samples positive | Animals positive | Humans positive | |
|---|---|---|---|
| WNV | 87 | 0 | 3 |
| EEE | 428 | 9 | 12 |
Human detection of EEE/WNV
| County name | Age | Onset | Virus Result | Presentation | ||
|---|---|---|---|---|---|---|
| Plymouth | 60 - 69 | 8/4/2019 | EEE | Encephalitis | ||
| Worcester | 20 - 29 | 7/30/2019 | EEE | Meningitis | ||
| Hampden | 70 - 79 | 8/16/2019 | EEE | Encephalitis | ||
| Bristol | 50 - 59 | 8/10/2019 | EEE | Meningoencephalitis | ||
| Middlesex | 70 - 79 | 8/31/2019 | EEE | Meningoencephalitis | ||
| Worcester | 60 - 69 | 9/1/2019 | EEE | Meningoencephalitis | ||
| Middlesex | <18 | 9/1/2019 | EEE | Encephalitis | ||
| Middlesex | 60 - 69 | 9/1/2019 | WNV | Meningoencephalitis | ||
| Bristol | 50 - 59 | 9/6/2019 | EEE | Encephalitis | ||
| Essex | 70 - 79 | 9/9/2019 | EEE | Encephalitis | ||
| Plymouth | 50 - 59 | 9/4/2019 | WNV | Fever | ||
| Bristol | 70 - 79 | 9/12/2019 | EEE | Encephalitis | ||
| Worcester | 70 - 79 | 9/12/2019 | EEE | Encephalitis | ||
| Hampden | 70 - 79 | 9/15/2019 | EEE | Encephalitis | ||
| Middlesex | 60 - 69 | 9/15/2019 | WNV | Fever |
Animal detection of EEE/WNV
| County Name | City | Onset | Virus Result | Species |
|---|---|---|---|---|
| Bristol | Norton | 8/11/2019 | EEE | Goat |
| Worcester | Mendon | 8/16/2019 | EEE | Horse |
| Worcester | Uxbridge | 8/22/2019 | EEE | Horse |
| Essex | Methuen | 8/22/2019 | EEE | Horse |
| Norfolk | Medfield | 8/24/2019 | EEE | Horse |
| Middlesex | Holliston | 8/23/2019 | EEE | Horse |
| Worcester | Brookfield | 8/27/2019 | EEE | Horse |
| Worcester | Douglas | 8/23/2019 | EEE | Horse |
| Worcester | Spencer | 9/27/2019 | EEE | Horse |
Mosquito detection of EEE/WNV
| County | City | Date Collected | Species | Agents |
|---|---|---|---|---|
| Suffolk | Boston | 7/3/2019 | Culex pipiens/restuans complex | WNV |
| Bristol | Easton | 7/15/2019 | Culiseta melanura | EEE |
| Bristol | Freetown | 7/15/2019 | Culiseta melanura | EEE |
| Bristol | New Bedford | 7/15/2019 | Culiseta melanura | EEE |
| Bristol | Fairhaven | 7/17/2019 | Culex pipiens/restuans complex | EEE |
| Berkshire | Pittsfield | 7/18/2019 | Culex pipiens/restuans complex | WNV |
| Bristol | New Bedford | 7/22/2019 | Aedes vexans | EEE |
| Plymouth | Carver | 7/22/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Halifax | 7/22/2019 | Coquillettidia perturbans | WNV |
| Plymouth | Halifax | 7/22/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Halifax | 7/22/2019 | Coquillettidia perturbans | EEE |
| Bristol | New Bedford | 7/22/2019 | Coquillettidia perturbans | EEE |
| Bristol | New Bedford | 7/22/2019 | Coquillettidia perturbans | EEE |
| Bristol | New Bedford | 7/22/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Kingston | 7/22/2019 | Culex pipiens/restuans complex | WNV |
| Plymouth | Lakeville | 7/22/2019 | Culex salinarius | EEE |
| Plymouth | Carver | 7/22/2019 | Culiseta melanura | WNV |
| Plymouth | Carver | 7/22/2019 | Culiseta melanura | EEE |
| Plymouth | Carver | 7/22/2019 | Culiseta melanura | EEE |
| Bristol | Easton | 7/22/2019 | Culiseta melanura | WNV |
| Bristol | Easton | 7/22/2019 | Culiseta melanura | WNV |
| Plymouth | Halifax | 7/22/2019 | Culiseta melanura | WNV |
| Plymouth | Halifax | 7/22/2019 | Culiseta melanura | EEE |
| Plymouth | Halifax | 7/22/2019 | Culiseta melanura | WNV |
| Plymouth | Halifax | 7/22/2019 | Culiseta melanura | WNV |
| Plymouth | Halifax | 7/22/2019 | Culiseta melanura | EEE |
| Bristol | New Bedford | 7/22/2019 | Culiseta melanura | EEE |
| Bristol | New Bedford | 7/22/2019 | Culiseta melanura | EEE |
| Bristol | New Bedford | 7/22/2019 | Culiseta melanura | EEE |
| Bristol | Rehoboth | 7/22/2019 | Culiseta melanura | EEE |
| Bristol | Rehoboth | 7/22/2019 | Culiseta melanura | EEE |
| Bristol | Rehoboth | 7/22/2019 | Culiseta melanura | EEE |
| Bristol | Rehoboth | 7/22/2019 | Culiseta melanura | EEE |
| Bristol | Rehoboth | 7/22/2019 | Culiseta melanura | EEE |
| Bristol | Rehoboth | 7/22/2019 | Culiseta melanura | EEE |
| Bristol | Freetown | 7/23/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Lakeville | 7/23/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Lakeville | 7/23/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Mattapoisett | 7/23/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Whitman | 7/23/2019 | Culex pipiens/restuans complex | WNV |
| Plymouth | Bridgewater | 7/23/2019 | Culiseta melanura | EEE |
| Plymouth | Bridgewater | 7/23/2019 | Culiseta melanura | EEE |
| Bristol | Dighton | 7/23/2019 | Culiseta melanura | EEE |
| Bristol | Freetown | 7/23/2019 | Culiseta melanura | EEE |
| Plymouth | Mattapoisett | 7/23/2019 | Culiseta melanura | EEE |
| Plymouth | Rochester | 7/25/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Mattapoisett | 7/25/2019 | Culiseta melanura | EEE |
| Plymouth | Rochester | 7/25/2019 | Culiseta melanura | EEE |
| Plymouth | Rochester | 7/25/2019 | Culiseta melanura | EEE |
| Worcester | Worcester | 7/26/2019 | Culex species | WNV |
| Plymouth | Lakeville | 7/26/2019 | Culiseta melanura | EEE |
| Bristol | New Bedford | 7/26/2019 | Culiseta melanura | EEE |
| Bristol | New Bedford | 7/26/2019 | Culiseta melanura | EEE |
| Bristol | New Bedford | 7/26/2019 | Culiseta melanura | EEE |
| Plymouth | Carver | 7/27/2019 | Coquillettidia perturbans | EEE |
| Bristol | Easton | 7/27/2019 | Coquillettidia perturbans | EEE |
| Bristol | Easton | 7/27/2019 | Coquillettidia perturbans | EEE |
| Bristol | New Bedford | 7/27/2019 | Culex salinarius | EEE |
| Bristol | Raynham | 7/27/2019 | Culex salinarius | EEE |
| Plymouth | Carver | 7/27/2019 | Culiseta melanura | EEE |
| Plymouth | Carver | 7/27/2019 | Culiseta melanura | EEE |
| Bristol | Easton | 7/27/2019 | Culiseta melanura | EEE |
| Bristol | Easton | 7/27/2019 | Culiseta melanura | EEE |
| Bristol | Easton | 7/27/2019 | Culiseta melanura | EEE |
| Bristol | New Bedford | 7/27/2019 | Culiseta melanura | EEE |
| Bristol | New Bedford | 7/27/2019 | Culiseta melanura | EEE |
| Bristol | Raynham | 7/27/2019 | Culiseta melanura | EEE |
| Bristol | Raynham | 7/27/2019 | Culiseta melanura | EEE |
| Bristol | Raynham | 7/27/2019 | Culiseta melanura | EEE |
| Plymouth | Carver | 7/29/2019 | Coquillettidia perturbans | WNV |
| Plymouth | Carver | 7/29/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Carver | 7/29/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Carver | 7/29/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Carver | 7/29/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Carver | 7/29/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Halifax | 7/29/2019 | Coquillettidia perturbans | WNV |
| Plymouth | Kingston | 7/29/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Kingston | 7/29/2019 | Coquillettidia perturbans | EEE |
| Bristol | New Bedford | 7/29/2019 | Coquillettidia perturbans | EEE |
| Bristol | New Bedford | 7/29/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Carver | 7/29/2019 | Culex salinarius | EEE |
| Plymouth | Lakeville | 7/29/2019 | Culex salinarius | EEE |
| Bristol | Raynham | 7/29/2019 | Culex salinarius | EEE |
| Plymouth | Carver | 7/29/2019 | Culiseta melanura | EEE |
| Plymouth | Carver | 7/29/2019 | Culiseta melanura | EEE |
| Plymouth | Carver | 7/29/2019 | Culiseta melanura | EEE |
| Plymouth | Carver | 7/29/2019 | Culiseta melanura | WNV |
| Plymouth | Carver | 7/29/2019 | Culiseta melanura | EEE |
| Plymouth | Carver | 7/29/2019 | Culiseta melanura | EEE |
| Plymouth | Carver | 7/29/2019 | Culiseta melanura | EEE |
| Plymouth | Halifax | 7/29/2019 | Culiseta melanura | WNV |
| Plymouth | Kingston | 7/29/2019 | Culiseta melanura | EEE |
| Bristol | New Bedford | 7/29/2019 | Culiseta melanura | EEE |
| Bristol | New Bedford | 7/29/2019 | Culiseta melanura | EEE |
| Bristol | New Bedford | 7/29/2019 | Culiseta melanura | EEE |
| Bristol | New Bedford | 7/29/2019 | Culiseta melanura | EEE |
| Bristol | New Bedford | 7/29/2019 | Culiseta melanura | EEE |
| Bristol | New Bedford | 7/29/2019 | Culiseta melanura | EEE |
| Bristol | New Bedford | 7/29/2019 | Culiseta melanura | EEE |
| Bristol | New Bedford | 7/29/2019 | Culiseta melanura | EEE |
| Bristol | New Bedford | 7/29/2019 | Culiseta melanura | EEE |
| Bristol | Raynham | 7/29/2019 | Culiseta melanura | EEE |
| Bristol | Raynham | 7/29/2019 | Culiseta melanura | EEE |
| Bristol | Raynham | 7/29/2019 | Culiseta melanura | EEE |
| Bristol | Rehoboth | 7/29/2019 | Culiseta melanura | EEE |
| Bristol | Rehoboth | 7/29/2019 | Culiseta melanura | EEE |
| Bristol | Rehoboth | 7/29/2019 | Culiseta melanura | EEE |
| Bristol | New Bedford | 7/29/2019 | Ochlerotatus canadensis | EEE |
| Bristol | Freetown | 7/30/2019 | Aedes vexans | EEE |
| Plymouth | Marion | 7/30/2019 | Aedes vexans | EEE |
| Plymouth | Middleborough | 7/30/2019 | Aedes vexans | EEE |
| Bristol | Easton | 7/30/2019 | Coquillettidia perturbans | EEE |
| Bristol | Easton | 7/30/2019 | Coquillettidia perturbans | EEE |
| Bristol | Easton | 7/30/2019 | Coquillettidia perturbans | EEE |
| Bristol | Easton | 7/30/2019 | Coquillettidia perturbans | EEE |
| Bristol | Easton | 7/30/2019 | Coquillettidia perturbans | EEE |
| Bristol | Easton | 7/30/2019 | Coquillettidia perturbans | EEE |
| Bristol | Easton | 7/30/2019 | Coquillettidia perturbans | EEE |
| Bristol | Easton | 7/30/2019 | Coquillettidia perturbans | EEE |
| Bristol | Easton | 7/30/2019 | Coquillettidia perturbans | EEE |
| Bristol | Freetown | 7/30/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Marion | 7/30/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Marion | 7/30/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Marion | 7/30/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Middleborough | 7/30/2019 | Coquillettidia perturbans | WNV |
| Plymouth | Middleborough | 7/30/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Middleborough | 7/30/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Middleborough | 7/30/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Middleborough | 7/30/2019 | Coquillettidia perturbans | EEE |
| Bristol | Raynham | 7/30/2019 | Coquillettidia perturbans | EEE |
| Bristol | Raynham | 7/30/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Rochester | 7/30/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Rochester | 7/30/2019 | Coquillettidia perturbans | EEE |
| Suffolk | Boston | 7/30/2019 | Culex pipiens/restuans complex | WNV |
| Suffolk | Boston | 7/30/2019 | Culex pipiens/restuans complex | WNV |
| Franklin | Deerfield | 7/30/2019 | Culex pipiens/restuans complex | WNV |
| Barnstable | Falmouth | 7/30/2019 | Culex pipiens/restuans complex | EEE |
| Middlesex | Framingham | 7/30/2019 | Culex pipiens/restuans complex | WNV |
| Middlesex | Framingham | 7/30/2019 | Culex pipiens/restuans complex | WNV |
| Middlesex | Framingham | 7/30/2019 | Culex pipiens/restuans complex | WNV |
| Middlesex | Framingham | 7/30/2019 | Culex pipiens/restuans complex | WNV |
| Plymouth | Pembroke | 7/30/2019 | Culex pipiens/restuans complex | WNV |
| Bristol | Easton | 7/30/2019 | Culex salinarius | EEE |
| Bristol | Easton | 7/30/2019 | Culex salinarius | EEE |
| Plymouth | Marion | 7/30/2019 | Culex salinarius | EEE |
| Plymouth | Marion | 7/30/2019 | Culex salinarius | EEE |
| Plymouth | Middleborough | 7/30/2019 | Culex salinarius | EEE |
| Plymouth | Middleborough | 7/30/2019 | Culex salinarius | EEE |
| Bristol | Easton | 7/30/2019 | Culiseta melanura | EEE |
| Bristol | Easton | 7/30/2019 | Culiseta melanura | EEE |
| Bristol | Easton | 7/30/2019 | Culiseta melanura | EEE |
| Bristol | Easton | 7/30/2019 | Culiseta melanura | EEE |
| Bristol | Easton | 7/30/2019 | Culiseta melanura | EEE |
| Bristol | Easton | 7/30/2019 | Culiseta melanura | EEE |
| Bristol | Easton | 7/30/2019 | Culiseta melanura | EEE |
| Bristol | Easton | 7/30/2019 | Culiseta melanura | EEE |
| Bristol | Easton | 7/30/2019 | Culiseta melanura | EEE |
| Bristol | Easton | 7/30/2019 | Culiseta melanura | EEE |
| Bristol | Easton | 7/30/2019 | Culiseta melanura | EEE |
| Bristol | Freetown | 7/30/2019 | Culiseta melanura | EEE |
| Bristol | Freetown | 7/30/2019 | Culiseta melanura | EEE |
| Plymouth | Marion | 7/30/2019 | Culiseta melanura | EEE |
| Plymouth | Marion | 7/30/2019 | Culiseta melanura | EEE |
| Plymouth | Middleborough | 7/30/2019 | Culiseta melanura | EEE |
| Plymouth | Middleborough | 7/30/2019 | Culiseta melanura | WNV |
| Plymouth | Middleborough | 7/30/2019 | Culiseta melanura | EEE |
| Plymouth | Middleborough | 7/30/2019 | Culiseta melanura | EEE |
| Plymouth | Middleborough | 7/30/2019 | Culiseta melanura | EEE |
| Plymouth | Middleborough | 7/30/2019 | Culiseta melanura | EEE |
| Plymouth | Middleborough | 7/30/2019 | Culiseta melanura | EEE |
| Plymouth | Middleborough | 7/30/2019 | Culiseta melanura | EEE |
| Plymouth | Pembroke | 7/30/2019 | Culiseta melanura | EEE |
| Bristol | Raynham | 7/30/2019 | Culiseta melanura | EEE |
| Plymouth | Rochester | 7/30/2019 | Culiseta melanura | EEE |
| Bristol | Taunton | 7/30/2019 | Culiseta melanura | WNV |
| Bristol | Easton | 7/30/2019 | Ochlerotatus canadensis | EEE |
| Bristol | Freetown | 7/30/2019 | Ochlerotatus canadensis | EEE |
| Plymouth | Marion | 7/30/2019 | Ochlerotatus canadensis | EEE |
| Plymouth | Middleborough | 7/30/2019 | Ochlerotatus canadensis | EEE |
| Plymouth | Middleborough | 7/30/2019 | Ochlerotatus canadensis | EEE |
| Plymouth | Middleborough | 7/30/2019 | Ochlerotatus canadensis | EEE |
| Worcester | Southborough | 7/31/2019 | Coquillettidia perturbans | EEE |
| Worcester | Southborough | 7/31/2019 | Coquillettidia perturbans | EEE |
| Norfolk | Brookline | 7/31/2019 | Culex pipiens/restuans complex | WNV |
| Norfolk | Brookline | 7/31/2019 | Culex pipiens/restuans complex | WNV |
| Middlesex | Stow | 7/31/2019 | Culex species | WNV |
| Bristol | Acushnet | 7/31/2019 | Culiseta melanura | EEE |
| Bristol | Fall River | 7/31/2019 | Culiseta melanura | EEE |
| Bristol | Fall River | 7/31/2019 | Culiseta melanura | EEE |
| Worcester | East Brookfield | 8/1/2019 | Culex pipiens/restuans complex | EEE |
| Barnstable | Truro | 8/1/2019 | Culex salinarius | WNV |
| Barnstable | Falmouth | 8/2/2019 | Coquillettidia perturbans | EEE |
| Barnstable | Falmouth | 8/2/2019 | Coquillettidia perturbans | EEE |
| Worcester | Westborough | 8/2/2019 | Coquillettidia perturbans | EEE |
| Worcester | Westborough | 8/2/2019 | Coquillettidia perturbans | EEE |
| Barnstable | Falmouth | 8/2/2019 | Culex pipiens/restuans complex | EEE |
| Barnstable | Falmouth | 8/2/2019 | Culiseta melanura | EEE |
| Plymouth | Wareham | 8/2/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Wareham | 8/2/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Wareham | 8/2/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Wareham | 8/2/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Wareham | 8/2/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Wareham | 8/2/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Wareham | 8/2/2019 | Culex salinarius | EEE |
| Plymouth | Wareham | 8/2/2019 | Culiseta melanura | EEE |
| Plymouth | Marion | 8/2/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Marion | 8/2/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Rochester | 8/2/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Marion | 8/2/2019 | Culex salinarius | EEE |
| Plymouth | Marion | 8/2/2019 | Culiseta melanura | EEE |
| Plymouth | Marion | 8/2/2019 | Culiseta melanura | EEE |
| Plymouth | Rochester | 8/2/2019 | Culiseta melanura | EEE |
| Plymouth | Marion | 8/2/2019 | Ochlerotatus canadensis | EEE |
| Plymouth | Rochester | 8/2/2019 | Ochlerotatus canadensis | EEE |
| Plymouth | West Bridgewater | 8/2/2019 | Culiseta melanura | EEE |
| Plymouth | East Bridgewater | 8/2/2019 | Coquillettidia perturbans | EEE |
| Plymouth | East Bridgewater | 8/2/2019 | Culiseta melanura | EEE |
| Plymouth | Whitman | 8/2/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Whitman | 8/2/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Whitman | 8/2/2019 | Culex salinarius | EEE |
| Plymouth | Duxbury | 8/4/2019 | Culiseta melanura | EEE |
| Plymouth | Carver | 8/5/2019 | Coquillettidia perturbans | EEE |
| Bristol | Easton | 8/5/2019 | Coquillettidia perturbans | EEE |
| Bristol | Easton | 8/5/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Kingston | 8/5/2019 | Coquillettidia perturbans | EEE |
| Bristol | Raynham | 8/5/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Kingston | 8/5/2019 | Culex pipiens/restuans complex | WNV |
| Plymouth | Carver | 8/5/2019 | Culex salinarius | EEE |
| Bristol | Easton | 8/5/2019 | Culex salinarius | EEE |
| Plymouth | Kingston | 8/5/2019 | Culex salinarius | EEE |
| Plymouth | Kingston | 8/5/2019 | Culex salinarius | EEE |
| Plymouth | Kingston | 8/5/2019 | Culex salinarius | EEE |
| Plymouth | Kingston | 8/5/2019 | Culex salinarius | EEE |
| Plymouth | Carver | 8/5/2019 | Culiseta melanura | EEE |
| Plymouth | Carver | 8/5/2019 | Culiseta melanura | EEE |
| Plymouth | Kingston | 8/5/2019 | Culiseta melanura | EEE |
| Bristol | New Bedford | 8/5/2019 | Culiseta melanura | EEE |
| Bristol | Raynham | 8/5/2019 | Culiseta melanura | EEE |
| Bristol | Raynham | 8/5/2019 | Culiseta melanura | EEE |
| Bristol | Raynham | 8/5/2019 | Culiseta melanura | EEE |
| Bristol | Easton | 8/5/2019 | Ochlerotatus canadensis | EEE |
| Bristol | New Bedford | 8/5/2019 | Ochlerotatus canadensis | EEE |
| Bristol | Raynham | 8/5/2019 | Ochlerotatus canadensis | EEE |
| Bristol | Freetown | 8/6/2019 | Coquillettidia perturbans | EEE |
| Middlesex | Medford | 8/6/2019 | Culex pipiens/restuans complex | WNV |
| Worcester | Worcester | 8/6/2019 | Culex species | WNV |
| Bristol | Freetown | 8/6/2019 | Culiseta melanura | EEE |
| Bristol | Raynham | 8/6/2019 | Culiseta melanura | EEE |
| Bristol | Raynham | 8/6/2019 | Culiseta melanura | WNV |
| Middlesex | Hopkinton | 8/6/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Carver | 8/7/2019 | Coquillettidia perturbans | EEE |
| Bristol | Dighton | 8/7/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Lakeville | 8/7/2019 | Coquillettidia perturbans | EEE |
| Bristol | New Bedford | 8/7/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Carver | 8/7/2019 | Culex salinarius | WNV |
| Plymouth | Carver | 8/7/2019 | Culex salinarius | EEE |
| Plymouth | Lakeville | 8/7/2019 | Culex salinarius | EEE |
| Plymouth | Lakeville | 8/7/2019 | Culex salinarius | EEE |
| Bristol | New Bedford | 8/7/2019 | Culex salinarius | EEE |
| Norfolk | Canton | 8/7/2019 | Culiseta melanura | EEE |
| Plymouth | Carver | 8/7/2019 | Culiseta melanura | EEE |
| Plymouth | Lakeville | 8/7/2019 | Culiseta melanura | EEE |
| Plymouth | Lakeville | 8/7/2019 | Culiseta melanura | EEE |
| Bristol | New Bedford | 8/7/2019 | Culiseta melanura | EEE |
| Bristol | Rehoboth | 8/7/2019 | Culiseta melanura | EEE |
| Bristol | Rehoboth | 8/7/2019 | Culiseta melanura | EEE |
| Bristol | Westport | 8/7/2019 | Culiseta melanura | EEE |
| Plymouth | Carver | 8/7/2019 | Ochlerotatus canadensis | EEE |
| Bristol | New Bedford | 8/7/2019 | Ochlerotatus canadensis | EEE |
| Worcester | Westborough | 8/8/2019 | Coquillettidia perturbans | EEE |
| Worcester | Westborough | 8/8/2019 | Coquillettidia perturbans | EEE |
| Worcester | Westborough | 8/8/2019 | Coquillettidia perturbans | EEE |
| Worcester | Westborough | 8/8/2019 | Coquillettidia perturbans | EEE |
| Middlesex | Lowell | 8/9/2019 | Culex species | EEE |
| Plymouth | Carver | 8/12/2019 | Coquillettidia perturbans | EEE |
| Bristol | Easton | 8/12/2019 | Coquillettidia perturbans | EEE |
| Bristol | Freetown | 8/12/2019 | Coquillettidia perturbans | EEE |
| Bristol | Freetown | 8/12/2019 | Coquillettidia perturbans | EEE |
| Bristol | Easton | 8/12/2019 | Culex salinarius | EEE |
| Bristol | Freetown | 8/12/2019 | Culex salinarius | EEE |
| Bristol | Attleboro | 8/12/2019 | Culiseta melanura | WNV |
| Plymouth | Carver | 8/12/2019 | Culiseta melanura | WNV |
| Bristol | Easton | 8/12/2019 | Culiseta melanura | EEE |
| Bristol | Freetown | 8/12/2019 | Culiseta melanura | EEE |
| Bristol | Freetown | 8/12/2019 | Culiseta melanura | EEE |
| Bristol | Freetown | 8/12/2019 | Culiseta melanura | EEE |
| Plymouth | Hanson | 8/12/2019 | Culiseta melanura | EEE |
| Bristol | Rehoboth | 8/12/2019 | Culiseta melanura | EEE |
| Bristol | Rehoboth | 8/12/2019 | Culiseta melanura | EEE |
| Bristol | Westport | 8/12/2019 | Culiseta melanura | EEE |
| Bristol | Rehoboth | 8/12/2019 | Ochlerotatus canadensis | EEE |
| Bristol | Westport | 8/12/2019 | Ochlerotatus canadensis | EEE |
| Essex | Andover | 8/13/2019 | Aedes vexans | EEE |
| Essex | Andover | 8/13/2019 | Coquillettidia perturbans | EEE |
| Norfolk | Avon | 8/13/2019 | Coquillettidia perturbans | EEE |
| Norfolk | Avon | 8/13/2019 | Coquillettidia perturbans | EEE |
| Norfolk | Canton | 8/13/2019 | Coquillettidia perturbans | EEE |
| Norfolk | Canton | 8/13/2019 | Coquillettidia perturbans | EEE |
| Barnstable | Falmouth | 8/13/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Halifax | 8/13/2019 | Coquillettidia perturbans | WNV |
| Plymouth | Hanson | 8/13/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Hanson | 8/13/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Kingston | 8/13/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Kingston | 8/13/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Lakeville | 8/13/2019 | Coquillettidia perturbans | WNV |
| Plymouth | Lakeville | 8/13/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Middleborough | 8/13/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Middleborough | 8/13/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Middleborough | 8/13/2019 | Coquillettidia perturbans | EEE |
| Bristol | New Bedford | 8/13/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Rochester | 8/13/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Rochester | 8/13/2019 | Coquillettidia perturbans | EEE |
| Norfolk | Walpole | 8/13/2019 | Coquillettidia perturbans | EEE |
| Norfolk | Walpole | 8/13/2019 | Coquillettidia perturbans | EEE |
| Norfolk | Walpole | 8/13/2019 | Coquillettidia perturbans | EEE |
| Norfolk | Weymouth | 8/13/2019 | Coquillettidia perturbans | EEE |
| Barnstable | Bourne | 8/13/2019 | Culex pipiens/restuans complex | EEE |
| Middlesex | Cambridge | 8/13/2019 | Culex pipiens/restuans complex | WNV |
| Middlesex | Cambridge | 8/13/2019 | Culex pipiens/restuans complex | WNV |
| Middlesex | Newton | 8/13/2019 | Culex pipiens/restuans complex | WNV |
| Middlesex | Newton | 8/13/2019 | Culex pipiens/restuans complex | WNV |
| Middlesex | Newton | 8/13/2019 | Culex pipiens/restuans complex | WNV |
| Plymouth | Hanson | 8/13/2019 | Culex salinarius | EEE |
| Plymouth | Kingston | 8/13/2019 | Culex salinarius | EEE |
| Plymouth | Kingston | 8/13/2019 | Culex salinarius | EEE |
| Plymouth | Middleborough | 8/13/2019 | Culex salinarius | EEE |
| Plymouth | Rochester | 8/13/2019 | Culex salinarius | EEE |
| Norfolk | Walpole | 8/13/2019 | Culex salinarius | EEE |
| Norfolk | Canton | 8/13/2019 | Culiseta melanura | EEE |
| Norfolk | Canton | 8/13/2019 | Culiseta melanura | EEE |
| Norfolk | Canton | 8/13/2019 | Culiseta melanura | WNV |
| Plymouth | Carver | 8/13/2019 | Culiseta melanura | EEE |
| Barnstable | Falmouth | 8/13/2019 | Culiseta melanura | EEE |
| Plymouth | Halifax | 8/13/2019 | Culiseta melanura | WNV |
| Plymouth | Hanson | 8/13/2019 | Culiseta melanura | EEE |
| Plymouth | Hanson | 8/13/2019 | Culiseta melanura | EEE |
| Plymouth | Middleborough | 8/13/2019 | Culiseta melanura | EEE |
| Plymouth | Middleborough | 8/13/2019 | Culiseta melanura | EEE |
| Bristol | New Bedford | 8/13/2019 | Culiseta melanura | EEE |
| Plymouth | Plympton | 8/13/2019 | Culiseta melanura | EEE |
| Plymouth | Rochester | 8/13/2019 | Culiseta melanura | EEE |
| Plymouth | Rochester | 8/13/2019 | Culiseta melanura | EEE |
| Bristol | Westport | 8/13/2019 | Culiseta melanura | EEE |
| Bristol | Westport | 8/13/2019 | Culiseta melanura | EEE |
| Norfolk | Weymouth | 8/13/2019 | Culiseta melanura | EEE |
| Bristol | New Bedford | 8/14/2019 | Culex pipiens/restuans complex | WNV |
| Bristol | Seekonk | 8/15/2019 | Culex pipiens/restuans complex | WNV |
| Bristol | Attleboro | 8/16/2019 | Culex pipiens/restuans complex | WNV |
| Hampshire | Hadley | 8/16/2019 | Culex pipiens/restuans complex | WNV |
| Hampden | Palmer | 8/16/2019 | Culex pipiens/restuans complex | WNV |
| Bristol | Dighton | 8/16/2019 | Culiseta melanura | EEE |
| Worcester | Grafton | 8/16/2019 | Coquillettidia perturbans | EEE |
| Worcester | Grafton | 8/16/2019 | Coquillettidia perturbans | EEE |
| Worcester | Upton | 8/16/2019 | Culiseta melanura | EEE |
| Worcester | Harvard | 8/17/2019 | Coquillettidia perturbans | EEE |
| Middlesex | Shirley | 8/17/2019 | Coquillettidia perturbans | EEE |
| Middlesex | Shirley | 8/17/2019 | Culex salinarius | EEE |
| Bristol | Easton | 8/17/2019 | Culiseta melanura | EEE |
| Bristol | Norton | 8/17/2019 | Culiseta melanura | WNV |
| Bristol | Norton | 8/17/2019 | Culiseta melanura | EEE |
| Bristol | Raynham | 8/17/2019 | Culiseta melanura | EEE |
| Bristol | Raynham | 8/17/2019 | Ochlerotatus canadensis | EEE |
| Worcester | Bolton | 8/17/2019 | Coquillettidia perturbans | EEE |
| Worcester | Bolton | 8/17/2019 | Culex salinarius | EEE |
| Essex | Andover | 8/19/2019 | Coquillettidia perturbans | EEE |
| Essex | Andover | 8/19/2019 | Coquillettidia perturbans | EEE |
| Essex | Lynn | 8/19/2019 | Culex pipiens | WNV |
| Essex | Boxford | 8/19/2019 | Culiseta melanura | EEE |
| Middlesex | Bedford | 8/20/2019 | Coquillettidia perturbans | EEE |
| Worcester | Leominster | 8/20/2019 | Culex species | WNV |
| Bristol | Rehoboth | 8/20/2019 | Culiseta melanura | EEE |
| Worcester | Worcester | 8/20/2019 | Culex species | WNV |
| Worcester | Worcester | 8/20/2019 | Culex species | WNV |
| Norfolk | Canton | 8/20/2019 | Culiseta melanura | EEE |
| Plymouth | Carver | 8/20/2019 | Coquillettidia perturbans | EEE |
| Bristol | Easton | 8/20/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Carver | 8/20/2019 | Culex salinarius | EEE |
| Bristol | Easton | 8/20/2019 | Culex salinarius | EEE |
| Bristol | Raynham | 8/20/2019 | Culex salinarius | EEE |
| Plymouth | Carver | 8/20/2019 | Culiseta melanura | EEE |
| Bristol | Easton | 8/20/2019 | Culiseta melanura | EEE |
| Bristol | Raynham | 8/20/2019 | Culiseta melanura | EEE |
| Bristol | Raynham | 8/20/2019 | Culiseta melanura | EEE |
| Plymouth | Carver | 8/20/2019 | Ochlerotatus canadensis | EEE |
| Plymouth | Lakeville | 8/20/2019 | Coquillettidia perturbans | EEE |
| Bristol | Dartmouth | 8/20/2019 | Culex salinarius | EEE |
| Plymouth | Wareham | 8/20/2019 | Culex salinarius | EEE |
| Bristol | Dartmouth | 8/20/2019 | Culiseta melanura | EEE |
| Bristol | Dartmouth | 8/20/2019 | Culiseta melanura | EEE |
| Bristol | Dartmouth | 8/20/2019 | Ochlerotatus canadensis | EEE |
| Worcester | Southborough | 8/21/2019 | Aedes vexans | EEE |
| Worcester | Southborough | 8/21/2019 | Aedes vexans | EEE |
| Plymouth | Bridgewater | 8/21/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Duxbury | 8/21/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Rochester | 8/21/2019 | Coquillettidia perturbans | EEE |
| Worcester | Southborough | 8/21/2019 | Coquillettidia perturbans | EEE |
| Worcester | Southborough | 8/21/2019 | Coquillettidia perturbans | EEE |
| Worcester | Southborough | 8/21/2019 | Coquillettidia perturbans | EEE |
| Worcester | Southborough | 8/21/2019 | Coquillettidia perturbans | EEE |
| Worcester | Southborough | 8/21/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Duxbury | 8/21/2019 | Culex salinarius | EEE |
| Plymouth | Middleborough | 8/21/2019 | Culex salinarius | EEE |
| Middlesex | Holliston | 8/21/2019 | Culex species | WNV |
| Middlesex | Hudson | 8/21/2019 | Culex species | EEE |
| Middlesex | Marlborough | 8/21/2019 | Culex species | EEE |
| Worcester | Southborough | 8/21/2019 | Culex species | EEE |
| Plymouth | Duxbury | 8/21/2019 | Culiseta melanura | EEE |
| Plymouth | Duxbury | 8/21/2019 | Culiseta melanura | EEE |
| Plymouth | Middleborough | 8/21/2019 | Culiseta melanura | EEE |
| Plymouth | Rochester | 8/21/2019 | Culiseta melanura | EEE |
| Plymouth | Rochester | 8/21/2019 | Culiseta melanura | EEE |
| Plymouth | Rochester | 8/21/2019 | Culiseta melanura | EEE |
| Barnstable | Truro | 8/22/2019 | Coquillettidia perturbans | EEE |
| Middlesex | Littleton | 8/22/2019 | Culex species | WNV |
| Worcester | Auburn | 8/23/2019 | Culex species | WNV |
| Norfolk | Cohasset | 8/24/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Duxbury | 8/24/2019 | Culex salinarius | EEE |
| Plymouth | Duxbury | 8/24/2019 | Culiseta melanura | EEE |
| Plymouth | Duxbury | 8/24/2019 | Culiseta melanura | EEE |
| Plymouth | Halifax | 8/24/2019 | Culiseta melanura | EEE |
| Plymouth | Norwell | 8/24/2019 | Culiseta melanura | EEE |
| Plymouth | Scituate | 8/24/2019 | Culiseta melanura | EEE |
| Middlesex | Sherborn | 8/25/2019 | Coquillettidia perturbans | EEE |
| Worcester | Uxbridge | 8/25/2019 | Coquillettidia perturbans | EEE |
| Worcester | Mendon | 8/25/2019 | Culex salinarius | EEE |
| Worcester | Douglas | 8/25/2019 | Culiseta melanura | EEE |
| Worcester | Mendon | 8/25/2019 | Culiseta melanura | EEE |
| Worcester | Uxbridge | 8/25/2019 | Culiseta melanura | EEE |
| Worcester | Uxbridge | 8/25/2019 | Ochlerotatus canadensis | EEE |
| Bristol | Dartmouth | 8/26/2019 | Culiseta melanura | EEE |
| Bristol | Easton | 8/26/2019 | Culiseta melanura | EEE |
| Bristol | Easton | 8/26/2019 | Culiseta melanura | EEE |
| Bristol | Rehoboth | 8/26/2019 | Culiseta melanura | EEE |
| Bristol | Dartmouth | 8/26/2019 | Ochlerotatus canadensis | EEE |
| Bristol | Easton | 8/26/2019 | Ochlerotatus canadensis | EEE |
| Essex | Methuen | 8/27/2019 | Coquillettidia perturbans | EEE |
| Suffolk | Boston | 8/27/2019 | Culex pipiens/restuans complex | WNV |
| Norfolk | Dover | 8/27/2019 | Culex pipiens/restuans complex | EEE |
| Hampden | Agawam | 8/28/2019 | Coquillettidia perturbans | EEE |
| Hampden | Agawam | 8/28/2019 | Coquillettidia perturbans | EEE |
| Worcester | Shrewsbury | 8/28/2019 | Coquillettidia perturbans | EEE |
| Worcester | Southborough | 8/28/2019 | Coquillettidia perturbans | EEE |
| Worcester | Southborough | 8/28/2019 | Coquillettidia perturbans | EEE |
| Worcester | Southborough | 8/28/2019 | Coquillettidia perturbans | EEE |
| Hampden | Agawam | 8/28/2019 | Culiseta melanura | EEE |
| Middlesex | Holliston | 8/28/2019 | Culiseta melanura | EEE |
| Worcester | East Brookfield | 8/29/2019 | Coquillettidia perturbans | EEE |
| Middlesex | Burlington | 8/29/2019 | Culex pipiens/restuans complex | EEE |
| Middlesex | Burlington | 8/29/2019 | Culex pipiens/restuans complex | WNV |
| Bristol | Somerset | 8/29/2019 | Culex pipiens/restuans complex | WNV |
| Hampden | East Longmeadow | 8/29/2019 | Culex salinarius | EEE |
| Worcester | East Brookfield | 8/29/2019 | Culiseta melanura | EEE |
| Hampden | East Longmeadow | 8/29/2019 | Culiseta melanura | EEE |
| Worcester | Millville | 8/29/2019 | Culiseta melanura | EEE |
| Worcester | Uxbridge | 8/29/2019 | Culiseta melanura | EEE |
| Barnstable | Wellfleet | 8/29/2019 | Coquillettidia perturbans | EEE |
| Essex | West Newbury | 9/3/2019 | Aedes vexans | EEE |
| Essex | West Newbury | 9/3/2019 | Coquillettidia perturbans | EEE |
| Essex | Lynn | 9/4/2019 | Culex pipiens | WNV |
| Bristol | Freetown | 9/4/2019 | Culiseta melanura | WNV |
| Plymouth | Mattapoisett | 9/4/2019 | Culiseta melanura | EEE |
| Bristol | Raynham | 9/4/2019 | Culex salinarius | EEE |
| Bristol | Raynham | 9/4/2019 | Culiseta melanura | EEE |
| Bristol | Rehoboth | 9/4/2019 | Culiseta melanura | EEE |
| Bristol | Rehoboth | 9/4/2019 | Ochlerotatus canadensis | EEE |
| Suffolk | Boston | 9/5/2019 | Culex pipiens/restuans complex | WNV |
| Worcester | Grafton | 9/8/2019 | Coquillettidia perturbans | EEE |
| Worcester | Grafton | 9/8/2019 | Culiseta melanura | EEE |
| Essex | Nahant | 9/9/2019 | Culex pipiens | WNV |
| Suffolk | Revere | 9/9/2019 | Culex salinarius | WNV |
| Suffolk | Boston | 9/10/2019 | Culex pipiens/restuans complex | WNV |
| Suffolk | Boston | 9/10/2019 | Culex pipiens/restuans complex | WNV |
| Suffolk | Boston | 9/10/2019 | Culex pipiens/restuans complex | WNV |
| Suffolk | Boston | 9/10/2019 | Culex pipiens/restuans complex | WNV |
| Suffolk | Boston | 9/10/2019 | Culex pipiens/restuans complex | WNV |
| Barnstable | Bourne | 9/10/2019 | Culex pipiens/restuans complex | EEE |
| Bristol | Easton | 9/10/2019 | Culex salinarius | WNV |
| Bristol | Easton | 9/10/2019 | Culex salinarius | WNV |
| Bristol | Easton | 9/10/2019 | Culiseta melanura | WNV |
| Bristol | Raynham | 9/10/2019 | Culiseta melanura | EEE |
| Barnstable | Truro | 9/10/2019 | Culiseta melanura | EEE |
| Plymouth | Carver | 9/10/2019 | Coquillettidia perturbans | EEE |
| Plymouth | Carver | 9/10/2019 | Culiseta melanura | EEE |
| Plymouth | Carver | 9/10/2019 | Ochlerotatus canadensis | EEE |
| Bristol | Easton | 9/10/2019 | Culiseta melanura | EEE |
| Bristol | Easton | 9/10/2019 | Culiseta melanura | EEE |
| Bristol | Easton | 9/10/2019 | Ochlerotatus canadensis | EEE |
| Norfolk | Quincy | 9/11/2019 | Culex pipiens/restuans complex | WNV |
| Worcester | Holden | 9/11/2019 | Coquillettidia perturbans | EEE |
| Worcester | Sterling | 9/11/2019 | Culiseta melanura | WNV |
| Worcester | Uxbridge | 9/11/2019 | Culiseta melanura | WNV |
| Worcester | Uxbridge | 9/11/2019 | Ochlerotatus canadensis | WNV |
| Barnstable | Falmouth | 9/12/2019 | Aedes vexans | EEE |
| Barnstable | Mashpee | 9/12/2019 | Culiseta melanura | EEE |
| Hampden | Brimfield | 9/12/2019 | Coquillettidia perturbans | EEE |
| Worcester | Holden | 9/12/2019 | Coquillettidia perturbans | EEE |
| Hampden | Brimfield | 9/12/2019 | Culiseta melanura | EEE |
| Worcester | Mendon | 9/12/2019 | Culiseta melanura | WNV |
| Worcester | East Brookfield | 9/15/2019 | Culiseta melanura | EEE |
| Worcester | Spencer | 9/15/2019 | Culiseta melanura | EEE |
| Worcester | Douglas | 9/16/2019 | Culiseta melanura | EEE |
| Essex | Haverhill | 9/17/2019 | Culex salinarius | WNV |
| Bristol | Easton | 9/17/2019 | Culiseta melanura | WNV |
| Bristol | New Bedford | 9/17/2019 | Culiseta melanura | EEE |
| Essex | Manchester-by-the-Sea | 9/23/2019 | Culiseta melanura | EEE |
| Essex | Manchester-by-the-Sea | 9/23/2019 | Culiseta melanura | EEE |
| Middlesex | North Reading | 9/24/2019 | Coquillettidia perturbans | WNV |
| Norfolk | Dedham | 9/24/2019 | Culex pipiens/restuans complex | WNV |
| Essex | Amesbury | 9/24/2019 | Culiseta melanura | EEE |
| Worcester | Gardner | 9/24/2019 | Culiseta melanura | EEE |
| Barnstable | Wellfleet | 9/24/2019 | Culiseta melanura | EEE |
| Worcester | Worcester | 9/27/2019 | Culex salinarius | WNV |
| Bristol | Freetown | 10/1/2019 | Culiseta melanura | WNV |
| Bristol | Seekonk | 10/3/2019 | Culiseta melanura | EEE |
| Bristol | Rehoboth | 10/8/2019 | Culiseta melanura | EEE |
| Last updated: | November 9, 2019 |
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