Impaired Waters and TMDLs in New England - Region 1
EPA Region 1 serves Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, Vermont and 10 tribal nations.
Basic Information
Region 1 HOT Topics
- Connecticut’s Jointly-Developed Bantam Lake Nutrient TMDLs and NPS Watershed-Based Plan
- Opti-Tool: EPA Region 1's Stormwater Management Optimization Tool
- Information on the Lake Champlain Phosphorus TMDL [UPDATED 2023]
Find Specific TMDLs and Impaired Waters
- Find a TMDL, Advance Restoration Plan, or Protection Plan in Region 1
- Find an Impaired Water or a State 303(d) List in Region 1
What is the 303(d) Vision?
Additional Information and Tools
- Region 1 TMDL and 303(d) Listing Program Contacts
- Region 1 Reports, Selected Regional Projects, and Fact Sheets about TMDLs and Impaired Waters
- Integrated Reporting (IR) Guidance documents
- Summary of State and Regional Water Information (Click on a State/map for its information) [updating in progress]
- Detailed Information on TMDLs and Impaired Waters (Expert Database Query)
- How's My Waterway?
- ATTAINS database
A TMDL is a clean water - pollutant reduction target, and also allocates an acceptable, allowable amount of each problem pollutant to each source.
The Impaired Waters or 303(d) list documents all of the known polluted water bodies in a state, along
with their pollutant problems (impairments).