Integrated Water Quality Monitoring and Assessment Reports

The Integrated Water Quality Monitoring and Assessment Report or "Integrated Report" (IR) summarizes water quality data collected by the DEP as well as numerous other state, federal and tribal government agencies, volunteer water monitoring organizations, and other sources. The Integrated Report is also known as the 305(b) report and 303(d) list because it is required by Section 305(b) of the Clean Water Act.

The Clean Water Act requires states to submit an Integrated Report to EPA every even-numbered year. Monitoring information is analyzed by the DEP to assess the ability of Maine 's water resources to meet uses such as drinking water, aquatic life support, fishing or recreation as established by Maine's Water Classification laws.

The 303d list of impaired waters identifies the waters not meeting one or more of their designated uses, and is included in Chapter 8 and Appendices in the 2006 version of the Integrated Report. The Integrated Report also provides detailed atlas information on miles and acreage of aquatic resources in Maine and information on groundwater and wetlands resources, however, an assessment of specific use support is not provided for those waters.

Each even-year cycle MDEP first posts a draft Integrated Report for public comment.  The final version with responses to comments is posted after it has received final approval from EPA .

Draft Report (if available)

Final reports

2006 Integrated Water Quality Monitoring and Assessment Report

EPA aproval letter for 2006 report

2006 Report (195 pages); 2006 Appendices (including 303d list) (113 pages)

2004 Integrated Water Quality Monitoring and Assessment Report

EPA approval letter for 2004 report

1. Introduction, Executive Summary and Response to Comments, Background
2. Surface Water Monitoring and Assessment, Wetlands
3. Ground Water Monitoring and Assessment
4. Public Health, Summary of Impaired Waters Requiring TMDLs, Accessing and Managing Data
5. Appendices
6. Appendices - Maps

2002 Integrated Water Quality Monitoring and Assessment Report

EPA approval letter for 2002 report

EPA New England’s Approval Decision on Maine’s 2002 Section 303(d) List

1. Overview, Summary Assessment of Freshwater Rivers and Streams, Summary Assessment of Lakes, Summary Assessment of Estuarine and Marine Waters
2. Groundwater Assessment (not available on-line)
3. Groundwater Section Images (not available on-line
4. Wetlands Assessment
5. Appendices, Integrated Lists of Waters and Monitoring Schedules

303d List

1998 303d list.    The list identifies water quality limited waters within the state, causes and sources of nonattainment of standards, and a timetable for the development of TMDLs (Total Maximum Daily Loads) or other management processes to address attainment.

Realted page: Lake assessment from condensed version of 1996 Maine WQA.