Moisture is the most common cause of mold growth. Although molds are pervasive in both indoor and outdoor environments, active mold growth and odors indicate that too much moisture is present. Indoor mold growth occurs when spores land on wet materials that can be a food source for mold. Mold growth indoors points to the presence of a water source, which can include leaks from plumbing or roofs, floods, condensation, or entry via the building exterior. Mold and fungal growth may also happen when indoor relative humidity is in more than 70 percent for a few days. When building materials become water-damaged, appropriate actions must be taken to prevent mold exposure
| EPHT_LAYER_NAME | ORGANIZATION | LAYER_DESCRIPTION | INFO_URL | LAYER_GROUP | DATA_LAST_UPDATED |
|---|---|---|---|---|---|
| 2010 CT Boundaries | U.S. Census Bureau's 2010 data release | This data layer presents 2010 clusters of block groups which generally have a total population size between 1,200 and 8,000 people with an optimum size of 4,000 people. | https://www.mass.gov/info-details/massgis-data-2010-us-census | Political Boundaries | April 2012 |
| 2020 CT Boundaries | U.S. Census Bureau's 2020 data release | This data layer presents 2020 clusters of block groups which generally have a total population size between 1,200 and 8,000 people with an optimum size of 4,000 people. | https://www.mass.gov/info-details/massgis-data-2020-us-census | Political Boundaries | December 2022 |
| Communities | The Massachusetts Department of Transportation (MassDOT) - Highway Division- Harbor and Lands Commission Town Boundary Atlas | This data layer contains the boundaries of the 351 communities (cities and towns) in Massachusetts. | https://www.mass.gov/info-details/massgis-data-municipalities | Political Boundaries | May 2024 |
| Counties | MA Municipality Layer | This data layer shows the boundaries of Massachusetts' Counties and was derived from the Community boundaries layer. | https://www.mass.gov/info-details/massgis-data-counties | Political Boundaries | April 2022 |
| Executive Office of Health and Human Services (EOHHS) Regions | Executive Office of Health and Human Services (EOHHS). | This data layer represents the six regions delineated by the commonwealth's Executive Office of Health and Human Services. These regions are used by the Department of Public Health for statistical, care coordination and administrative purposes. | https://www.mass.gov/info-details/massgis-data-ma-executive-office-of-health-human-services-regions | Political Boundaries | April 2022 |
| MA Emergency Preparedness Regions & Regional Coalitions (EPRCs) | MDPH Office of Preparedness and Emergency Preparedness Management (OPEM) | This data layer is a combination of two statewide boundary layers (Emergency Preparedness Regions & Emergency Preparedness Regional Coalitions) used by the MDPH Bureau of Climate and Environmental Health (BCEH), Massachusetts Department of Public Health (MDPH) for planning and administrative purposes. | https://www.mass.gov/info-details/massgis-data-ma-emergency-preparedness-regions-regional-coalitions | Political Boundaries | August 2021 |
| Regional Planning Agencies | MA Municipality Layer | This data layer represents boundaries for 13 regional planning agencies (RPAs) in Massachusetts. | https://www.mass.gov/info-details/massgis-data-regional-planning-agencies | Political Boundaries | August 2021 |
| State Representative District | 2020 U.S. Census | This data layer presents boundaries of the Massachusetts State House of Representatives districts, which were signed into law on November 4, 2021. Map service from MassGIS. These boundaries began to be used with the fall 2022 elections and are based on demographic data from the 2020 U.S. Census. | https://www.mass.gov/info-details/massgis-data-massachusetts-house-legislative-districts-2021 | Political Boundaries | January 2025 |
| State Senate Districts | 2020 U.S. Census | This data layer presents boundaries of the Massachusetts State Senate districts, which were signed into law on November 4, 2021. These boundaries began to be used with the fall 2022 elections and are based on demographic data from the 2020 U.S. Census. | https://www.mass.gov/info-details/massgis-data-massachusetts-senate-legislative-districts-2021 | Political Boundaries | January 2023 |
| 2020 EJ Block Group Boundaries | Executive Office of Energy and Environmental Affairs (EEA) | This dataset represents 2020 Census block groups boundaries across the state that meet one or more EJ criteria. | MassGIS: https://www.mass.gov/info-details/massgis-data-2020-environmental-justice-populations | Environmental Justice | June 2024 |
| 2020 EJ Neighborhoods by Block Group | Executive Office of Energy and Environmental Affairs (EEA) | This dataset represents 2020 Census block groups across the state that meet one or more EJ criteria. | MassGIS: https://www.mass.gov/info-details/massgis-data-2020-environmental-justice-populations | Environmental Justice | June 2024 |
| 2010 EJ Block Group Boundaries | Executive Office of Energy and Environmental Affairs (EEA) | This dataset represents 2010 Census block groups boundaries across the state that meet one or more EJ criteria. | https://www.arcgis.com/home/item.html?id=be23f3e6276b4ebda4540441bf9ffff6 | Environmental Justice | April 2021 |
| 2010 EJ Neighborhoods by Block Group | Executive Office of Energy and Environmental Affairs (EEA) | This dataset represents 2010 Census block groups across the state that meet one or more EJ criteria. | https://www.arcgis.com/home/item.html?id=be23f3e6276b4ebda4540441bf9ffff6 | Environmental Justice | April 2021 |
| Number of EJ Criteria Met | Executive Office of Energy and Environmental Affairs (EEA) | This dataset represents the number of EJ block groups and which EJ criteria met within a city/town. | MDPH Bureau of Climate and Environmental Health: Custom layer built for the EJ tool | Environmental Justice | 2019 |
| Percent of the Population in EJ Block Groups | Executive Office of Energy and Environmental Affairs (EEA) | This dataset represents the percent of a city/town's population living in EJ block groups and which EJ criteria are met for at 1 least 1 block group in that city/town. | MDPH Bureau of Climate and Environmental Health: Custom layer built for the EJ tool | Environmental Justice | 2019 |
| Percent of block groups meeting EJ criteria n | Executive Office of Energy and Environmental Affairs (EEA) | This dataset represents the percent of block groups within a city/town that meet at least 1 EJ criteria. | MDPH Bureau of Climate and Environmental Health: Custom layer built for the EJ tool | Environmental Justice | 2019 |
| Percent of Community of Color Population by Community | 2020 Census Redistricting Data: Table P2 | This dataset represents the percent of a city/town's population that identify as people of color. | MDPH Bureau of Climate and Environmental Health: Custom layer built for the EJ tool | Environmental Justice | 2019 |
| Median Household Income by Community | U.S. Census American Community Survey 2020 5-year estimates: Table B19013 | This dataset represents the median household income for all cities/towns in MA along with the statewide median household income. | MDPH Bureau of Climate and Environmental Health: Custom layer built for the EJ tool | Environmental Justice | 2019 |
| Percent of the Population with English Isolation | U.S. Census American Community Survey 2020 5-year estimates: Table C16002 | This dataset represents the percent of limited English-speaking households (English Isolation) by city/town. Limited English-speaking households are defined as households without a person 14 years of age or older who speaks English 'very well'. | MDPH Bureau of Climate and Environmental Health: Custom layer built for the EJ tool | Environmental Justice | 2019 |
| Predominant non-English Languages Spoken (Census Tract Language Spoken EEA Layer 2020) | MA Executive Office of Energy and Environmental Affairs | This data layer presents languages spoken by at least 5% of population in the CT who do not speak English 'very well' | https://massachsuetts-environmental-justice-datasets-mass-eoeea.hub.arcgis.com/datasets/Mass-EOEEA::languages-spoken-by-tract-acs-/about | Environmental Justice | June 2025 |
| Childhood Blood Lead Prevalence | MDPH Childhood Lead Poisoning Prevention Program (CLPPP) | This dataset presents CT level childhood blood lead prevalence calculated based on EOEEA EJ Policy criteria. The MA EPHT Childhood blood lead dataset was used to calculate this measure. Childhood blood lead data was sourced from the MDPH Childhood Lead Poisoning Prevention Program (CLPPP). | MDPH Bureau of Climate and Environmental Health: Custom layer built for the EJ tool; https://www.mass.gov/orgs/childhood-lead-poisoning-prevention-program | Vulnerable Health EJ by CT | 2021 |
| Low Birth Weight | MDPH Registry of Vital Records and Statistics | This dataset presents CT level low birth weight rates calculated based on EOEEA EJ Policy criteria. The MA EPHT low birth weight l dataset was used to calculate this measure. Low birth weight data was sourced from the MDPH Registry of Vital Records and Statistics (RVRS). | MDPH Bureau of Climate and Environmental Health: Custom layer built for the EJ tool; https://www.mass.gov/orgs/registry-of-vital-records-and-statistics | Vulnerable Health EJ by CT | 2021 |
| Elevated Blood Lead Prevalence | MDPH Childhood Lead Poisoning Prevention Program (CLPPP) | This dataset presents city/town childhood blood lead prevalence calculated based on EOEEA EJ Policy criteria. The MA EPHT Childhood blood lead dataset was used to calculate this measure. Childhood blood lead data was sourced from the MDPH Childhood Lead Poisoning Prevention Program (CLPPP). | MDPH Bureau of Climate and Environmental Health: Custom layer built for the EJ tool; https://www.mass.gov/orgs/childhood-lead-poisoning-prevention-program | Vulnerable Health EJ by Community | 2025 |
| Low Birth Weight | MDPH Registry of Vital Records and Statistics | This dataset presents city/town low birth weight rates calculated based on EOEEA EJ Policy criteria. The MA EPHT low birth weight l dataset was used to calculate this measure. Low birth weight data was sourced from the MDPH Registry of Vital Records and Statistics (RVRS. | MDPH Bureau of Climate and Environmental Health: Custom layer built for the EJ tool; https://www.mass.gov/orgs/registry-of-vital-records-and-statistics | Vulnerable Health EJ by Community | 2021 |
| Heart Attack | MA Center for Health Information and Analysis | This dataset presents city/town heart attack hospitalization rates calculated based on EOEEA EJ Policy criteria. The MA EPHT Heart attack hospitalization dataset was used to calculate this measure. Heart attack hospitalization data was sourced from the MA Center for Health Information and Analysis (CHIA). | MDPH Bureau of Climate and Environmental Health: Custom layer built for the EJ tool; https://www.chiamass.gov/ | Vulnerable Health EJ by Community | 2025 |
| Childhood Asthma ED Visits | MA Center for Health Information and Analysis | This dataset presents city/town childhood asthma (ages 5-14) emergency department visit rates calculated based on EOEEA EJ Policy criteria. The MA EPHT asthma ED visits dataset was used to calculate this measure. Asthma emergency department data was sourced from the MA Center for Health Information and Analysis (CHIA). | MDPH Bureau of Climate and Environmental Health: Custom layer built for the EJ tool; https://www.chiamass.gov/ | Vulnerable Health EJ by Community | 2025 |
| Census Tract Percent of Housing Built Before 1978 | U.S. Census ACS 2017-2021 | This data layer presents the percent of Massachusetts housing built before 1978 by Census Tract | MDPH Bureau of Climate and Environmental Health: Custom layer | Housing Built Before 1978 | 2023 |
| City/Town Percent of Housing Built Before 1978 | U.S. Census ACS 2017-2021 | This data layer presents the percent of Massachusetts housing built before 1978 by City/Town | MDPH Bureau of Climate and Environmental Health: Custom layer | 2023 | |
| Home Owners Loan Corporation Risk (Redlining) Maps (1935-1940) | Home Owners' Loan Corporation (HOLC) | This data layer presents the percent areas graded by the Home Owners' Loan Corporation (HOLC) between 1935-1940, to assess "residential security" of thousands of . "Security" means the relative security or riskiness of those areas for banks, saving and loans, and other lenders who made mortgages. | https://dsl.richmond.edu/panorama/redlining/data | HOLC Residential Security (Redlining) Map | 2021 |
| MassDEP Tier Classified Sites | Massachusetts Department of Environmental Protection (MA DEP) | This data layer contains the approximate location of oil and/or hazardous material disposal sites that have been (1) reported and (2) Tier Classified under M.G.L. Chapter 21E and the Massachusetts Contingency Plan (MCP). | https://www.mass.gov/info-details/massgis-data-massdep-tier-classified-oil-andor-hazardous-material-sites-mgl-c-21e | MassDEP Layers | May 2025 |
| MassDEP Sites with Activity and Use Limitations (AUL) sites | Massachusetts Department of Environmental Protection (MA DEP) | This data layer contains the approximate location of oil or hazardous material release or disposal sites where an Activity and Use Limitation (AUL) has been filed | https://www.mass.gov/info-details/massgis-data-massdep-oil-andor-hazardous-material-sites-with-activity-and-use-limitations-aul | MassDEP Layers | May 2025 |
| MassDEP Major Air and Waste Facilities | Massachusetts Department of Environmental Protection (MA DEP) | This data layer contains the location of a subset of facility types regulated by MassDEP’s Bureau of Air and Waste. | https://www.mass.gov/info-details/massgis-data-massdep-major-facilities#attributes | MassDEP Layers | April 2024 |
| MassDEP Public Water Suppliers | Massachusetts Department of Environmental Protection (MA DEP) | This data layer presents the locations of public community surface and groundwater supply sources and public non-community supply sources as defined in 310 CMR 22.00. | https://www.mass.gov/info-details/massgis-data-public-water-supplies | MassDEP Layers | May 2025 |
| Underground Storage Tanks (UST) | Massachusetts Department of Environmental Protection (MA DEP) | This data layer is a statewide dataset containing the locations of facilities having one or more underground storage tanks. | https://www.mass.gov/info-details/massgis-data-massdep-underground-storage-tanks | MassDEP Layers | April 2016 |
| Toxic Release Inventory Sites | Environmental Protection Agency (EPA) | This data layer presents locations of TRI facilities in Massachusetts. EPAs Toxics Release Inventory (TRI) Program tracks the industrial management of toxic chemicals. TRI data are reported annually by industrial and federal facilities that meet reporting requirements. | https://www.epa.gov/toxics-release-inventory-tri-program | EPA Facilities | 2017 |
| Superfund Site Boundaries | Environmental Protection Agency (EPA) | This data layer presents polygons depicting U.S. EPA Superfund Site boundaries located in Massachusetts. | https://catalog.data.gov/dataset/npl-superfund-site-boundaries-epa10 | EPA Facilities | 2024 |
| NOAA Seal Level Rise (1-6ft) | National Oceanic and Atmospheric Administration (NOAA) | This data layer presents the potential inundation of coastal areas resulting from a projected 1 to 6 feet rise in sea level above current Mean Higher High Water (MHHW) conditions. Shows NOAA’s prediction of coastal flooding above Mean Higher High Water (MHHW, the average height of daily highest tide) with six increasing levels of sea level rise up to six feet. | https://www.mass.gov/info-details/massgis-data-noaa-sea-level-rise | Federal Flood Hazards and Sea Level Rise | June 2019 |
| Inundation Zones | National Oceanic and Atmospheric Administration (NOAA) | This data layer presents worst-case Hurricane Surge Inundation areas for Category 1 through 4 hurricanes striking the coast of Massachusetts. This Surge Inundation layer was created by the U.S. Army Corps of Engineers, New England District. | https://www.mass.gov/info-details/massgis-data-hurricane-surge-inundation-zones | Federal Flood Hazards and Sea Level Rise | October 2013 |
| Percent of residential areas located in a flood zone | Federal Emergency Management Agency (FEMA) | This data layer presents the percent of residential areas located in a 100-year flood zone | MDPH Bureau of Climate and Environmental Health: Custom layer | Federal Flood Hazards and Sea Level Rise | 2025 |
| FEMA Q3 Flood Zones | Federal Emergency Management Agency (FEMA) | These data represent a subset of the data available on the paper Flood Insurance Rate Maps (FIRM) as provided by the Federal Emergency Management Agency (FEMA). The Q3 flood data were developed to support floodplain management and planning activities but do not replace the official paper FIRMs. These data are not suitable for engineering applications or site work nor can the data be used to determine absolute delineation of flood boundaries. Instead the data should be used to portray zones of uncertainty and possible risks associated with flooding. All counties except Franklin are available for Massachusetts. | https://www.mass.gov/info-details/massgis-data-fema-q3-flood-zones-from-paper-firms | Federal Flood Hazards and Sea Level Rise | July 2023 |
| FEMA National Flood Hazards | Federal Emergency Management Agency (FEMA) | This data layer presents the current effective flood risk data for those parts of the country where maps have been modernized by the Federal Emergency Management Agency | https://www.mass.gov/info-details/massgis-data-fema-national-flood-hazard-layer | Federal Flood Hazards and Sea Level Rise | July 2023 |
| Hurricane Evacuation Zone | Federal Emergency Management Agency (FEMA) | This data layer shows areas in Massachusetts where evacuation may be necessary during hurricanes or tropical storms due to risk of storm surge. Areas located in Zones A & B, include areas that, depending on predicted inundation, may flood first from storm surge during a tropical storm or hurricane. Areas in Zone A would flood before areas in Zone B. Areas in Zone C, may flood depending on the track and intensity of the storm. Note: The hurricane evacuation zones do not directly correspond to hurricane categories. Storm surge impact is not measured by the Saffir-Simpson hurricane category scale, and storm surge threats can vary from storm to storm. | https://www.mass.gov/info-details/hurricane-evacuation-zones | Federal Flood Hazards and Sea Level Rise | 2014 |
| 2030-2080 Average Days Rainfall Over an Inch | MA Climate Change Clearing House | This data layer shows the projected changes in days of rainfall greater than 1 inch, and are based on watershed(basin) location using data from the Massachusetts Climate Change Clearinghouse. This information can be used to identify future hazards and prepare for potential health threats. | https://resilientma-mapcenter-mass-eoeea.hub.arcgis.com/ | Climate Rainfall Predictions | 2025 |
| 2030 - 2080 Average Days Temperature Over 90 degrees | MA Climate Change Clearing House | This data layer shows the projected changes in days over 90 degrees F for years 2030-2080, and are based on watershed(basin) location using data from the Massachusetts Climate Change Clearinghouse. This information can be used to identify future hazards and prepare for potential health threats. | https://resilientma-mapcenter-mass-eoeea.hub.arcgis.com/ | Climate Temperature Predictions | 2025 |
| Long Term Care Residence | Division of Health Care Facility Licensure and Certification | This data layer presents Long-Term Care Residences point data layer contains the locations of licensed nursing homes, rest homes and assisted living residences in Massachusetts. | https://www.mass.gov/info-details/massgis-data-long-term-care-residences | Municipal Buildings and Healthcare Facilities | March 2024 |
| Acute Care Hospitals | Office of Emergency Medical Services (OEMS) and the Center for Health Information and Analysis (CHIA) | This data layer shows the location of 70 acute care hospitals in Massachusetts. Acute care hospitals are those licensed under MGL Chapter 111, section 51 and which contain a majority of medical-surgical, pediatric, obstetric, and maternity beds, as defined by the Massachusetts Department of Public Health (DPH). The features in this layer are based on database information provided to MassGIS from the DPH, Office of Emergency Medical Services (OEMS) and the Center for Health Information and Analysis (CHIA). | https://www.mass.gov/info-details/massgis-data-acute-care-hospitals | Municipal Buildings and Healthcare Facilities | September 2025 |
| Community Health Centers (Main Centers) | Massachusetts League of Community Health Centers | This data layer contains the location of community health centers (CHCs) in Massachusetts. Centers appearing in this layer are those that provide primary, dental, and/or eye care, or administrative work as listed by the Massachusetts League of Community Health Centers. | https://www.mass.gov/info-details/massgis-data-community-health-centers | Municipal Buildings and Healthcare Facilities | February 2025 |
| Town/City Hall | Massachusetts Emergency Management Agency (MEMA) GIS Program in cooperation with the Regional Planning Agencies. | This data layer shows the location of primary municipal executive offices in Massachusetts, including town and city halls. The Massachusetts Emergency Management Agency (MEMA) GIS Program in cooperation with the Regional Planning Agencies and participating communities developed the original version of this data layer | https://www.mass.gov/info-details/massgis-data-town-and-city-halls | Municipal Buildings and Healthcare Facilities | 2017 |
| Schools | Massachusetts Department of Elementary and Secondary Education (DOE) | This data layer shows the locations of pre-K-12 schools in Massachusetts. | https://www.arcgis.com/home/item.html?id=ea1712f54ae148db8f37bd691a421bbe | Municipal Buildings and Healthcare Facilities | April 2021 |
| Libraries | Massachusetts Board of Library Commissioners (MBLC) | This dataset contains points which represent locations of all public and some special libraries currently registered with the Massachusetts Board of Library Commissioners (MBLC). MassGIS created the layer from a list received in January 2025 from the MBLC of libraries that are members of the Massachusetts Library System (MLS). | https://www.mass.gov/info-details/massgis-data-libraries | Municipal Buildings and Healthcare Facilities | April 2025 |
| Fire Stations | Massachusetts Emergency Management Agency (MEMA) GIS Program in cooperation with the Regional Planning Agencies. | This data layer shows the point locations of 771 Fire stations in the Commonwealth of Massachusetts. The Massachusetts Emergency Management Agency (MEMA) GIS Program in cooperation with the Regional Planning Agencies and participating communities created the original fire station data | https://www.mass.gov/info-details/massgis-data-fire-stations | Municipal Buildings and Healthcare Facilities | 2022 |
| MBTA Bus Stops and Routes | Massachusetts Bay Transportation Authority | These data layers represent bus stops and routes within the Massachusetts Bay Transportation Authority (MBTA) public transit system. The layers were developed by the Central Transportation Planning Staff (CTPS) of the Boston Region Metropolitan Planning Organization (MPO). | https://www.mass.gov/info-details/massgis-data-mbta-bus-routes-and-stops | MBTA bus and rapid transit | June 2017 |
| MBTA Rapid Transit Stops | Massachusetts Bay Transportation Authority | This data layer represents the station stops on the five subway, streetcar/trolley and Silver Line bus lines in the Massachusetts Bay Transportation Authority's rapid transit rail network. The layers were developed by the Central Transportation Planning Staff (CTPS), with additional editing by MassGIS based on current information from mbta.com and aerial and street-based imagery. | https://www.mass.gov/info-details/massgis-data-mbta-rapid-transit | MBTA bus and rapid transit | December 2022 |
| MBTA Commuter Lines | Massachusetts Bay Transportation Authority | This data layer includes active passenger, freight, and MBTA Commuter Rail and Rapid Transit railways, along with abandoned rail lines | https://www.mass.gov/info-details/massgis-data-trains | MBTA bus and rapid transit | November 2023 |
| Ferry Routes | National Oceanic and Atmospheric Administration (NOAA) Raster Navigational Charts | This data layer presents ferry routes within Massachusetts. | https://gis.data.mass.gov/datasets/MassDOT::ferry-routes/about | MBTA bus and rapid transit | June 2024 |
| RTA Stops | Massachusetts Department of Transportation | This data layer contains the bus routes for the Regional Transit Authorities of Massachusetts except for the MBTA | https://geo-massdot.opendata.arcgis.com/datasets/MassDOT::rta-bus-stops/about | Regional Transit Agencies | March 2024 |
| RTA Routes | Massachusetts Department of Transportation | This data layer contains all of Massachusetts' Regional Transit Authority bus routes with the exception of the MBTA | https://gis.data.mass.gov/datasets/MassDOT::rta-bus-routes/about | March 2024 | |
| RTA Service Ares | Massachusetts Department of Transportation | This data layer presents the fifteen Massachusetts Department of Transportation (MassDOT) Regional Transit Authorities (RTAs) in Massachusetts. | https://geo-massdot.opendata.arcgis.com/datasets/MassDOT::rta-boundaries-1/about | March 2024 | |
| MassDOT Roads | Massachusetts Department of Transportation | This data layer is the official state-maintained street transportation dataset available from MassGIS. | https://www.mass.gov/info-details/massgis-data-massgis-massdot-roads | Transportation Infrastructure | January 2025 |
| Airports | Massachusetts Department of Transportation | This data layer presents the location of all Airport facilities in Massachusetts. | https://gis.data.mass.gov/datasets/MassDOT::airports/about | Transportation Infrastructure | May 2024 |
| Freight Rail Yards | Massachusetts Department of Transportation | This data layer contains the locations of rail yards in the Commonwealth of Massachusetts. This point data layer contains the locations of rail yards in the Commonwealth of Massachusetts. These yards provide a transfer facility between one or more freight rail operators and a place to store and maintain railcars. | https://gis.data.mass.gov/datasets/MassDOT::freight-rail-yards-3/about | Transportation Infrastructure | June 2024 |
| Water Taxis | Massachusetts Department of Transportation | This data layer contains the name and location of water taxi stops in the Boston Harbor | https://gis.data.mass.gov/datasets/MassDOT::water-taxis/about | Transportation Infrastructure | June 2024 |
| Railroad Tracks | Massachusetts Department of Transportation | This data layer contains the rail network covering the Commonwealth of Massachusetts | https://gis.data.mass.gov/datasets/MassDOT::rail-inventory-3/about | Transportation Infrastructure | December 2024 |
| Nuclear Power Plants | Energy Generation and Supply | ||||
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