303 (d) event tables are intended for use with the PNW Reach files 1:100,000 scale routed hydrography Each event contains Clean Water Act 303 (d) information detailing the parameter(s) for which a stream segment's water quality is impaired, an LLID (Longitude Latitude Identifier) which identifies the stream, and a from measurement and a to measurement (in feet) which define the position of the data segment on the stream. These tables may be imported directly into Arc/Info and established as events along the routed hydrography to show water quality information in a GIS format, or may simpily be compared to other LLID-based stream data in a tabular format. Please see the 303(d) event table metadata files below for important information about these tables and the methods used to generate them. Each state uses a different method in establishing their 303(d) lists so cross-state comparisons may not be appropriate. Because not all of the 303(d) information could be shown on the 1:100,000 scale routed hydrography, these event tables SHOULD NOT be considered a complete set of 303(d) information. For a complete set of 303(d) listings, contact:
* Washington Department of Ecology (DOE) at http://www.ecy.wa.gov/programs/wq/303d/index.html (standard listing format)
-or-
http://www.ecy.wa.gov/services/gis/maps/wria/303d/303dpdf.htm (map/GIS format)
* Oregon Department of Environmental Quality (DEQ) at http://www.deq.state.or.us/wq/303dlist/303dpage.htm
* Idaho Department of Environmental Quality (DEQ) at (208) 373-0502
* Montana Department of Environmental Quality (DEQ) (year 2000 list) at http://www.deq.state.mt.us/ppa/mdm/303_d/303_d_list-draft.asp
Event Tables Download (dbf format)
Washington 1998 303(d) Event Table
** Idaho 303(d) listings are currently under review by Idaho DEQ. We expect to develop a new 303(d) event table after this data set has been updated. **
** Oregon DEQ has completed an event table of the entire 303(d) matrix in an event format, tied to the 1:100,000 scale PNW reach files. This matrix is now available for download on their site at http://waterquality.deq.state.or.us/wq/303dlist/Download303d.htm **
Event Tables Metadata (text format)
** Idaho 303(d) listings are currently under review by Idaho DEQ. We expect to develop a new 303(d) event table after this data set has been updated. **
** See the Oregon DEQ web site at http://waterquality.deq.state.or.us/wq/303dlist/Download303d.htm for complete metadata. **
Washington 1998 303(d) Event Table Metadata