2008 303(d) Impaired and Threatened Water
By Water Resource Inventory Area
by clicking a map area)
In accordance with Section 303(d) of the federal Clean Water Act, every two
years each state must identify its polluted water bodies and submit this list to
EPA. Our maps show where in Washington State these estuaries, lakes, and
streams are located.
- All maps are for individual Water Resource Inventory Areas (WRIA).
- All maps are formatted to the same page size either 8.5 x 11 or 11 x 8.5
- All 303(d) maps have been
produced with no extra geographic information and with a "no
color" watershed area background. This facilitates printing on clear
acetate so the maps can be used for "overlay" purposes. For
example, one can print a TRS map on
clear acetate and overlay it on the 303(d) map to get township, range, and
- Local geographic information such as roads and route numbers, city and
place names are provided on the WRIA
Major Public Lands maps.
- All 2008 303(d) PDF map files contain two (2) or more pages. The first
page is the WRIA map with 303(d) parameter segment centers with a leader arrow and ID number
located near the center of the affected area. Additional page(s) contain the 303(d) category 5 list with columns for the ID number from
the map, the official site Listing number, the site name (if known), the
site/listing parameter assessment and the site medium. The maps and
accompanying pages can be printed double sided if desired.
- All maps are available in Adobe PDF format. JPG
or EPS file format, are available by
- If you are unfamiliar with using Adobe Acrobat, click
here to see some tips on using
Adobe Acrobat Reader with our maps.
Digital 303(d) GIS data is available for download on this
website at: GIS Data page
For more information on the 303(d) program, check out Ecology's Water
also has an
interactive web application to view 303(d) listed water bodies in your web
browser (Internet Explorer only).
Tuesday, May 04, 2010.
Questions or Comments about this page? Contact Mike Woodall at