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Total Maximum Daily Loads by Watershed

Draft and final TMDL reports for Massachusetts and the New England region.
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Table of Contents

Northeast Regional Mercury TMDL

Final Northeast Regional Mercury TMDL (PDF 499.07 KB)
Northeast Regional Mercury Total Maximum Daily Load: Final Addendum for Massachusetts (PDF 183.96 KB)
New England Interstate Water Pollution Control Commission: Mercury TMDL 

Blackstone River Watershed

Draft Pathogen TMDL for the Blackstone River Watershed (PDF 1.03 MB)
Final TMDLs of Phosphorus for Indian Lake (PDF 677.92 KB)
Final TMDLs of Phosphorus for Lake Quinsigamond and Flint Pond (PDF 666.75 KB)
Final TMDLs of Phosphorus for Leesville Pond (PDF 691.51 KB)
Final TMDL for Northern Blackstone Lakes (PDF 2.12 MB)
Final TMDLs of Phosphorus for Salisbury Pond (PDF 853.16 KB)

Boston Harbor Watershed

Final Pathogen TMDL Report for the Boston Harbor, Weymouth-Weir, and Mystic Watersheds (PDF 4.78 MB)
Mystic River Watershed Alternative TMDL Development for Phosphorus Management - Final Report (PDF 6.02 MB)
Final TMDLs of Bacteria for Neponset River Basin (PDF 1.69 MB)
Final Neponset Bacteria TMDL Addendum (PDF 824.12 KB)

Buzzards Bay Watershed

Final Fiddlers Cove and Rands Harbor Embayment Systems Total Maximum Daily Loads for Total Nitrogen (PDF 1.63 MB)
Final Quissett Harbor Embayment System Total Maximum Daily Loads for Total Nitrogen (PDF 1.11 MB)
Final Wild Harbor Embayment System Total Maximum Daily Loads for Total Nitrogen (PDF 1.28 MB)
Final TMDL of Total Phosphorus for White Island Pond (PDF 2.44 MB)
White Island Pond Memorandum of Agreement (PDF 35.47 KB)
Final Pathogen TMDL for the Buzzards Bay Watershed (PDF 2.85 MB)
Final Pathogen TMDL for the Buzzards Bay Watershed - Appendices (PDF 3.47 MB)
Final Nitrogen TMDL for Westport River (PDF 1.81 MB)
Final Nitrogen TMDL for Slocums & Little Rivers Embayment System (PDF 10.19 MB)

Cape Cod Watershed

Final Nitrogen TMDL Report for Megansett-Squeteague Harbor Estuarine System, June 2020 (PDF 5.52 MB)
Final Nitrogen TMDL Report for Falmouth Inner Harbor, June 2020 (PDF 3.19 MB)
Final Nitrogen TMDL Report for Waquoit Bay System, June 2020 (PDF 6.8 MB)
Final Total-Nitrogen TMDL for the Bass River Estuarine System (PDF 1.77 MB)
Final Total-Nitrogen TMDL for the Parkers River Embayment System (PDF 2.02 MB)
Final Total-Nitrogen TMDL for the Swan Pond River Estuarine System (PDF 1.74 MB)
Final Pathogen TMDL Report for the Cape Cod Watershed (PDF 2.01 MB)
Addendum to Final Cape Cod Pathogen TMDL Report, March 2012 (PDF 669.9 KB)
Final Nutrient TMDL for Centerville River/East Bay (PDF 540.29 KB)
Final TMDL for Lewis Bay for Total Nitrogen (PDF 2.8 MB)
Final Nitrogen TMDL for Little Pond (PDF 729.48 KB)
Final Nitrogen TMDL for Oyster Pond (PDF 500.21 KB)
Final Nitrogen TMDL for Phinneys Harbor (PDF 629.27 KB)
Final Nitrogen TMDL for Pleasant Bay System (PDF 1.66 MB)
Final Nitrogen TMDL for West Falmouth Harbor (PDF 496.09 KB)
Final Nitrogen TMDL Report for Five Sub-Embayments of Popponesset Bay (PDF 357.89 KB)
Final Nitrogen TMDL Report for the Quashnet River, Hamblin Pond, Little River, Jehu Pond, and Great River in the Waquoit Bay System (PDF 551.39 KB)
Final Bacteria TMDL Report for the Three Bays System (PDF 1.11 MB)
Final Nitrogen TMDL Report for the Three Bays System (PDF 628.89 KB)
Final Nitrogen TMDL Report for Five Chatham Embayments (Stage Harbor, Sulphur Springs, Taylors Pond, Bassing Harbor and Muddy Creek) (PDF 398.14 KB)
Final TMDL Report of Bacteria for Frost Fish Creek, Chatham (PDF 826.1 KB)
Final TMDLs of Nitrogen for Great, Green, and Bournes Pond Embayment Systems (PDF 2.56 MB)
Final TMDL Report of Bacteria for Muddy Creek, Chatham (PDF 603.84 KB)
Final TMDL for Total Nitrogen for Allen, Wychmere & Saquatucket Harbors (PDF 1.02 MB)
Final TMDL for Total Nitrogen for the Herring River (PDF 1.33 MB)

Charles River Watershed

Optimal Stormwater Management Plan Alternatives: A Demonstration Project in Three Upper Charles River Communities (PDF 3.59 MB)
Final TMDL for Nutrients in the Upper/Middle Charles River (PDF 2.2 MB)
Final TMDL for Nutrients in the Upper/Middle Charles River:Appendix (PDF 111.41 KB)
Final Phosphorus TMDL Report for the Lower Charles River Basin (PDF 1.77 MB)
Final Pathogen TMDL Reports for the Charles River Watershed (PDF 3.73 MB)
Final Pathogen TMDL Reports for the Charles River Watershed, Appendix A (PDF 1.12 MB)
Final Pathogen TMDL Reports for the Charles River Watershed, Appendix B (PDF 2.26 MB)
Pathogen Hotspots in the Charles River Watershed (PDF 547.3 KB)

Chicopee River Watershed

Final TMDLs of Phosphorus for Quaboag and Quacumquasit Ponds (PDF 2.7 MB)
Final TMDLs of Phosphorus for Selected Chicopee Basin Lakes (PDF 2.03 MB)

Concord River Watershed

Draft Pathogen TMDL for Concord River Watershed, S. 1 (PDF 250.33 KB)
Draft Pathogen TMDL for Concord River Watershed, S. 2 (PDF 2.73 MB)
Draft Pathogen TMDL for Concord River Watershed, S. 3 (PDF 79.3 KB)

Connecticut River Watershed

Final TMDLs of Phosphorus for Selected Connecticut Basin Lakes (PDF 2.01 MB)

French River Watershed

Final TMDLs of Phosphorus for Selected French Basin Lakes (PDF 5.02 MB)

Islands Watershed

Final Chilmark Pond Estuarine System Total Maximum Daily Load for Total Nitrogen (PDF 1.3 MB)
Final Total-Nitrogen TMDL for Tisbury Great Pond/Black Point Pond Estuarine System (PDF 2.48 MB)
Final Edgartown Great Pond System Total Maximum Daily Load for Nitrogen (PDF 1.29 MB)
Final Farm Pond Estuarine System Total Maximum Daily Load for Total Nitrogen (Control Number 391.1) (PDF 1.79 MB)
Final Pathogen TMDL Report for the Islands Watershed (PDF 2.08 MB)
Final Lagoon Pond Estuarine System Total Maximum Daily Loads for Total Nitrogen (Control No. 390.1) (PDF 1.79 MB)
Final Lake Tashmoo Estuarine System Total Maximum Daily Load for Total Nitrogen (PDF 1.83 MB)
Final Nitrogen TMDL for Madaket Harbor/Long Pond (PDF 1.31 MB)
Final TMDLs of Total Nitrogen for Nantucket Harbor (PDF 398.82 KB)
Final Sengekontacket Pond Estuarine System Total Maximum Daily Loads for Total Nitrogen, Control Number 310.0 (PDF 1.14 MB)

Merrimack River Watershed

Draft Pathogen TMDL Report for the Merrimack River Watershed (PDF 983.39 KB)

Millers River Watershed

Final TMDLs of Phosphorus for Selected Millers River Basin Lakes (PDF 3.28 MB)

Narragansett Bay Watershed

Final Pathogen TMDL for the Narragansett/Mt. Hope Bay Watershed (PDF 1.78 MB)
Final Bacteria TMDL for Palmer River Basin (PDF 1.76 MB)
Final Bacteria TMDL for Palmer River Basin Appendix A (PDF 277.35 KB)
Final Bacteria TMDL for Palmer River Basin Appendix B (PDF 1.67 MB)
Final Bacteria TMDL for Palmer River Basin Appendix C (PDF 359.62 KB)

Nashua River Watershed

Final TMDL for Bare Hill Pond (PDF 723.51 KB)
Draft Pathogen TMDL for the Nashua River (PDF 583.67 KB)

North Coastal Watershed

Final Pathogen TMDL for the North Coastal Watershed (PDF 1.76 MB)

Shawsheen River Watershed

Draft Storm Water Pollutant TMDL for Headwaters of the Shawsheen River (PDF 1020.53 KB)
Final TMDLs of Bacteria for Shawsheen River Basin (PDF 517.7 KB)

South Coastal Watershed

Final Pathogen TMDL for the South Coastal Watershed (PDF 3.42 MB)
Final TMDLs of Bacteria for Little Harbor, Cohasset (PDF 974.96 KB)

SuAsCo Watershed

Final TMDLs of Phosphorus for Lake Boon (Boons Pond) (PDF 1.36 MB)
Final Nutrient TMDL Report for the Assabet River (PDF 2.18 MB)
US Army Corps of Engineers: Assabet River Sediment and Dam Removal Study 

Taunton Watershed

Draft West and East Monponsett Pond System Total Maximum Daily Loads for Total Phosphorus (PDF 4.3 MB)
Final Pathogen TMDL Report for the Taunton Watershed (PDF 1.2 MB)
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