Region 1 Impaired Waters and 303(d) Lists by State

Under Section 303(d) of the Clean Water Act (CWA), states, territories, and authorized tribes (referred to as 'states' below) are required to develop, and update every two years, lists of waters - rivers, lakes, coastal waters and estuaries - that are impaired (or threatened) by one or more pollutants. Impaired waters are waters that do not meet Water Quality Standards (WQSs) even after point sources of pollution (e.g., municipal and industrial discharges) have installed required levels of pollution controls. In addition to listing impaired waters, each state prioritizes TMDLs for development.

States must consider "all existing and readily available information" when developing their lists. Along with the list, each state submits a listing methodology to EPA. At EPA's request, states must provide "good cause" for not including or removing a water from the list. To read the impaired waters lists for New England states please go to the links below under "New England State Pages".

EPA Listing Information:

• Guidance for Assessment, Listing, and Reporting Requirements Pursuant to Sections 303(d), 305(b) and 314 of the Clean Water Act
• EPA National TMDL Technical Support Documents

EPA Approval Documentation for the New England States' Impaired Waters/303(d) Lists

303(d) lists are organized by state and in chronological order, with the most recently approved impaired waters listed first. The tables will be updated continuously as lists are approved.

• Connecticut
• Maine
• Massachusetts
• New Hampshire
• Rhode Island
• Vermont

Many of the 303(d) list documents submitted to EPA by the States appear in their TMDL or 303(d) list web pages (links in the table below). Please note that the document that contains the 303(d) list may be labeled "Integrated Report", and that the 303(d) list itself may be found in an appendix part of the document.