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Biotoxin Notices

View past notices regarding biotoxin shellfish closures and openings
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2026 Notices

6/12/26: Shellfish Reopening Following Paralytic Shellfish Poisoning (PSP) in Nauset System (OC2 - OC5)
6/5/26: Paralytic Shellfish Poisoning (PSP) Closures Rescinded (SC53 - SC63)
5/15/26: Shellfish Reopening Following Paralytic Shellfish Poisoning (PSP) Closure in Chatham (SC52)
5/6/26: Shellfish Closure due to Paralytic Shellfish Poisoning (PSP) in Eastham and Orleans (OC2 - OC6)
4/29/26: Shellfish Closure due to Paralytic Shellfish Poisoning (PSP) in Orleans, Chatham, and Harwich (SC52 - SC62)

2025 Notices

3/19/25: PSP Shellfish Closures in Nauset Marsh System (OC2 - OC6)

2024 Notices

11/27/24: PSP (Red Tide) Closure Notice for the Harvest of all Shellfish in Salt Pond, Open PDF file, 123.62 KB (English, PDF 123.62 KB)
8/9/24: DSP Closure for Nauset System (OC4 and OC6) Lifted; Open to Harvest of Bivalve Shellfish
7/10/24: DSP Closure Lifted for Nauset System (OC2, OC3, OC5); Open to Bivalve Shellfish Harvest
6/28/24: DSP Closure in Nauset System (OC2-OC6)
6/13/24: Reopening of Nauset System
3/19/24: PSP (Red Tide) Closure Notice for the Harvest of all Shellfish for Nauset Marsh System, Open PDF file, 128.2 KB (English, PDF 128.2 KB)
3/19/24: Pre-Cautionary PSP Closure Notice for Namequoit River, Frostfish Cove and Meetinghouse Pond, Open PDF file, 239.39 KB (English, PDF 239.39 KB)
3/13/24: PSP (Red Tide) Closure Notice for the Harvest of all Shellfish in Salt Pond , Open PDF file, 126.08 KB (English, PDF 126.08 KB)
1/11/24: Lifting of PSP (Red Tide) Closure for the Harvest of all Shellfish in Salt Pond, Open PDF file, 126.92 KB (English, PDF 126.92 KB)

2023 Notices

12/21/23: PSP (Red Tide) Closure Notice for the Harvest of all Shellfish in Salt Pond, Open PDF file, 126.3 KB (English, PDF 126.3 KB)
12/9/23: Lifting of PSP (Red Tide) Closure for the Harvest of all Shellfish in Salt Pond, Open PDF file, 132.75 KB (English, PDF 132.75 KB)
12/1/23: PSP (Red Tide) Closure Notice for the Harvest of all Shellfish in Salt Pond, Open PDF file, 126.26 KB (English, PDF 126.26 KB)
7/21/23: Lifting of PSP (Red Tide) Closure for the Harvest of Bivalve Shellfish in Salt Pond, Open PDF file, 132.71 KB (English, PDF 132.71 KB)
6/15/23: Lifting of PSP (Red Tide) Closure for the Harvest of Bivalve Shellfish in Nauset System, Open PDF file, 175.22 KB (English, PDF 175.22 KB)
6/8/23: Lifting of PSP (Red Tide) Closure for the Harvest of Bivalve Shellfish in Pleasant Bay, Open PDF file, 133.78 KB (English, PDF 133.78 KB)
6/2/23: Lifting of PSP (Red Tide) Closure for the Harvest of Bivalve Shellfish in Pleasant Bay, System Remains Closed to Snails and Softshell Clams, Open PDF file, 134.99 KB (English, PDF 134.99 KB)
5/18/23: Lifting of PSP (Red Tide) Closure for the Harvest of Shellfish in Chatham Harbor, Open PDF file, 138.86 KB (English, PDF 138.86 KB)
4/14/23: PSP (Red Tide) Closure Notice for the Harvest of all Shellfish in Chatham Harbor, Open PDF file, 205.18 KB (English, PDF 205.18 KB)
4/12/23: PSP (Red Tide) Closure Notice for the Harvest of Blue Mussels in Chatham Harbor and Pleasant Bay, Open PDF file, 205.95 KB (English, PDF 205.95 KB)
3/8/23: PSP (Red Tide) Closure Notice for the Harvest of all Shellfish in Nauset System, Open PDF file, 207.56 KB (English, PDF 207.56 KB)
1/5/23: Lifting of PSP (Red Tide) Closure for the Harvest of Shellfish in Salt Pond, Open PDF file, 210.84 KB (English, PDF 210.84 KB)

2022 Notices

12/22/22: PSP (Red Tide) Closure Notice for the Harvest of all Shellfish in Salt Pond, Open PDF file, 205.48 KB (English, PDF 205.48 KB)
9/16/22: Lifting of PSP (Red Tide) Closure for North Shore and Boston Harbor Growing Areas, Open PDF file, 208.2 KB (English, PDF 208.2 KB)
9/16/22: Lifting of PSP Closure for Greater Boston Harbor , Open PDF file, 248.99 KB (English, PDF 248.99 KB)
9/15/22: Areas of the North Shore (N1 through N14) Open to the Harvest of Shellfish Except Ocean Quahogs and Carnivorous Snails , Open PDF file, 206.25 KB (English, PDF 206.25 KB)
8/30/22: Partial Re-Opening of Merrimack River (Growing Area N2) for the Harvest of Shellfish, Open PDF file, 536.27 KB (English, PDF 536.27 KB)
7/29/22: Merrimack River Open to the Harvest of Softshell Clams, Open PDF file, 608.07 KB (English, PDF 608.07 KB)
7/27/22: Boston and South Shore Open to the Harvest of Shellfish Except Carnivorous Snails and Whole Sea Scallops, Open PDF file, 254.95 KB (English, PDF 254.95 KB)
7/21/22: Areas of the North Shore (N1and N3 through N14) Open to the Harvest of Shellfish Except Surf clams, Ocean Quahogs and Carnivorous Snails, Open PDF file, 544.54 KB (English, PDF 544.54 KB)
7/14/22: Partial Re-Opening of Marshfield, Duxbury, Kingston and Plymouth to the Harvest of Blue Mussels, Open PDF file, 253.31 KB (English, PDF 253.31 KB)
7/13/22: Partial Re-Opening of Plum Island Sound, Ipswich River, and Cranes Beach to the Harvest of Softshell Clams, Open PDF file, 207.17 KB (English, PDF 207.17 KB)
7/7/22: Partial Re-Opening of Essex Bay (N7) to the Harvest of Softshell Clams, Open PDF file, 207.97 KB (English, PDF 207.97 KB)
6/23/22: PSP (Red Tide) Closure Notice for Harvest of Blue Mussels on the South Shore, Open PDF file, 249.36 KB (English, PDF 249.36 KB)
6/23/22: PSP (Red Tide) Closure for the Harvest of Blue Mussels in North Shore and Boston Harbor Growing Areas, Open PDF file, 539.04 KB (English, PDF 539.04 KB)
06/16/22: PSP (Red Tide) Closure Notice for All Bivalve Shellfish & Carnivorous Snails in N1-N14, Open PDF file, 237.73 KB (English, PDF 237.73 KB)
6/14/22: PSP Closure Notice for Blue Mussels in Areas N1 through N14, Open PDF file, 240.79 KB (English, PDF 240.79 KB)
6/9/22: Lifting of PSP Closure of Salt Pond, Nauset, Open PDF file, 211.13 KB (English, PDF 211.13 KB)
6/3/22: Lifting of PSP Closure in OC:2 through OC:5, Open PDF file, 257.02 KB (English, PDF 257.02 KB)
4/15/22: Lifting of Pre-Cautionary PSP Closure for all Waters and Flats in Swansea, Open PDF file, 211.96 KB (English, PDF 211.96 KB)
4/14/22: Pre-Cautionary PSP Closure of all Waters and Flats in Swansea, Open PDF file, 156.94 KB (English, PDF 156.94 KB)
4/14/22: Closure of Entire Nauset System due to PSP, Open PDF file, 153.64 KB (English, PDF 153.64 KB)

2021 Notices

08/11/321: PSP (Red Tide) Opening for All Bivalve Shellfish Species; Closure Remains for Carnivorous Snails (N7)
07/30/21: PSP (Red Tide) Opening for All Species Except Carnivorous Snails and Whole Sea Scallops (MB1 - MB14), Open PDF file, 242.3 KB (English, PDF 242.3 KB)
07/29/21: PSP (Red Tide) Opening for All Species (N1 - N6, N8, N10 - N28) and Soft Shell & Razor Clams (N9), Open PDF file, 226.97 KB (English, PDF 226.97 KB)
07/16/21: PSP (Red Tide) Closure Notice for All Bivalve Shellfish and Carnivorous Snails in N1 - N28 and MB1 - MB14
07/15/21: PSP (Red Tide) Closure Notice for Softshell & Razor Clams (N1 - N28) and All Shellfish (MB1 - MB14), Open PDF file, 186.56 KB (English, PDF 186.56 KB)
07/14/21: PSP (Red Tide) Closure for Blue Mussels (N1 - N28 & MB1 - MB14), Open PDF file, 185.61 KB (English, PDF 185.61 KB)
0616/21: PSP (Red Tide) Opening for All Species Except Moon Snails (Nauset System: OC2 - OC6), Open PDF file, 253.34 KB (English, PDF 253.34 KB)
03/17/21: PSP (Red Tide) Closure Notice for Shellfish (Nauset System: OC2 - OC6), Open PDF file, 206.97 KB (English, PDF 206.97 KB)

2020 Notices

05/28/20: PSP (Red Tide) Opening for All Shellfish Species in Nauset System (OC:2-OC:6) Effective May 29
4/30/20: (Red Tide) Shellfish Opening for All Species Except Blue Mussels and Moon Snails (OC2 - OC6)
3/19/20: PSP Closure Notice Nauset OC 2 - OC 6, Open PDF file, 143.67 KB (English, PDF 143.67 KB)

2019 Notices

10/10/19: PSP (Red Tide) Shellfish Opening for All Species Except Whole Sea Scallops and Carnivorous Snails (N1 - N14), Open PDF file, 74.27 KB (English, PDF 74.27 KB)
08/07/19: PSP (Red Tide) Shellfish Opening for Blue Mussels & Razor Clams (N1 - N14), Open PDF file, 78.39 KB (English, PDF 78.39 KB)
07/30/19: PSP (Red Tide) Shellfish Opening on North Shore for Softshell Clams (N1 - N14), Open PDF file, 74.43 KB (English, PDF 74.43 KB)
07/19/19: PSP (Red Tide) Shellfish Opening Notice (MB1 - MB14), Open PDF file, 176.38 KB (English, PDF 176.38 KB)
06/26/19: PSP (Red Tide) Shellfish Closure for the North Shore (N1 - N14), Open PDF file, 67.7 KB (English, PDF 67.7 KB)
06/20/19: PSP (Red Tide) Shellfish Closure for the North Shore (N1 - N6, N8, N10-N14), Open PDF file, 74.22 KB (English, PDF 74.22 KB)
06/20/19: PSP (Red Tide) Shellfish Closure for Gloucester (N9), Open PDF file, 74.13 KB (English, PDF 74.13 KB)
06/19/19: PSP (Red Tide) Shellfish Closure for the South Shore (MB1 - MB14), Open PDF file, 141.39 KB (English, PDF 141.39 KB)
06/18/19: PSP (Red Tide) Shellfish Closure for Essex Bay (N7), Open PDF file, 77.46 KB (English, PDF 77.46 KB)
06/07/19: Opening of OC2 - OC6 (Nauset) to Harvest of Bivalve Shellfish , Open PDF file, 184.9 KB (English, PDF 184.9 KB)
04/24/19: PSP (Red Tide) Shellfish Closure in Nauset System (OC2-OC6), Open PDF file, 135.47 KB (English, PDF 135.47 KB)

2018 Notices

04/04/2018 PSP (Red Tide) Closure in Nauset System (OC2-OC6), Open PDF file, 135.05 KB (English, PDF 135.05 KB)

2017 Notices

09/22/2017 PSP (Red Tide) Opening for All Shellfish except Ocean Quahogs and Carnivorous Snails - N1-N14, Open PDF file, 551.43 KB (English, PDF 551.43 KB)
09/22/2017 PSP (Red Tide) Opening for All Shellfish except Ocean Quahogs and Carnivorous Snails - Essex Bay (N7), Open PDF file, 314.72 KB (English, PDF 314.72 KB)
07/17/2017 PSP (Red Tide) Opening for Softshell and Razor Clams - Essex Bay (N7), Open PDF file, 295.73 KB (English, PDF 295.73 KB)
07/09/2017 PSP (Red Tide) Closure for All Shellfish - Essex Bay (N7), Open PDF file, 84.87 KB (English, PDF 84.87 KB)
06/28/2017 PSP (Red Tide) Closure for Blue Mussels - N1-N6 and N8-N14, Open PDF file, 187.29 KB (English, PDF 187.29 KB)
06/23/2017 PSP (Red Tide) Closure for Blue Mussels - Essex Bay (N7), Open PDF file, 263.44 KB (English, PDF 263.44 KB)
06/16/2017 PSP (Red Tide) Opening - Salt Pond, Eastham (OC6), Open PDF file, 314.15 KB (English, PDF 314.15 KB)
06/09/2017 PSP (Red Tide) Opening in Nauset System (OC2-OC5), Open PDF file, 562.13 KB (English, PDF 562.13 KB)
5/3/17 PSP (Red Tide) Closure in Nauset Estuary (OC2-OC6) , Open PDF file, 478.31 KB (English, PDF 478.31 KB)

2016 Notices

2015 Notices

5/12/15 PSP Closure - Nauset System (OC:2-OC:6), Open PDF file, 104.51 KB (English, PDF 104.51 KB)

2014 Notices

9/12/14 PSP Opening - Surf Clams (N:1-N:14), Open PDF file, 99.75 KB (English, PDF 99.75 KB)
7/3/14 PSP Opening (N1-N14), Open PDF file, 43.19 KB (English, PDF 43.19 KB)
7/1/14 PSP Opening - Razor & Softshell Clams (N9 & N10), Open PDF file, 60.52 KB (English, PDF 60.52 KB)
6/19/14 PSP Opening - Razor & Softshell Clams (N4 & N7), Open PDF file, 61.99 KB (English, PDF 61.99 KB)
6/2/14 PSP Closure - Blue Mussels (N:1-N:14), Open PDF file, 60.62 KB (English, PDF 60.62 KB)
6/4/14 PSP Closure - (N:1, N:3-N:14), Open PDF file, 65.99 KB (English, PDF 65.99 KB)

2013 Notices

6/19/13 PSP Opening - Bivalve Shellfish (OC:6), Open PDF file, 78.55 KB (English, PDF 78.55 KB)
6/12/13 PSP Opening - Bivalve Shellfish (OC:2-OC:5), Open PDF file, 119.08 KB (English, PDF 119.08 KB)
4/24/13 PSP Closure - All Shellfish in Nauset System (OC:2-OC:6), Open PDF file, 101.65 KB (English, PDF 101.65 KB)

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