This is a PDF file that summarizes well testing results in the Lower Yakima Valley.

This map shows the Watcom Clean Water Program Area

Use this guidance poster to encourage boatyard cleaning instead of underwater cleaning of boats.

Find a local marina with oil recycling for your boat fuel

This letter from the SWG chair outlines the funding recommendations for the second round of effectiveness studies for Stormwater Action Monitoring

This a quality-control tool for environmental laboratories is used with the 5-day Biochemical Oxygen Demand (BOD) test, Standard Method 5210-B.

is a quality-control tool for environmental laboratories.

is a quality-control tool for environmental laboratories.

Water Treatment Plant 2014 previous permit fact sheet.

This addendum goes with the draft rule language for the informal comment period.

A letter from the Washington Department of Ecology, signed by Director Maia Bellon, to Senators John Barrsso and Tom Carpenter, Chairman and ranking member of the Senate Environment & Public Works Committee, respectively, setting the record straight on why a water quality certification was denied to Millennium Bilk Terminals - Longview.

This document explains 2gH Solutions Uplet Outlet is not approved by Ecology, however it is allowed to be installed with stipulations.

This is adopted rule language for WAC 173-201A Water Quality Standards for Surface Waters of the State of Washington

The 401 certification document for Wynoochee

Agenda for the July 10, 2018 Manual Update Webinar

This is the withdrawn rulemaking announcement (CR 101) for WAC 173-201A Water quality standards for surface waters of the state of Washington.

This is adopted rule language for WAC 173-224 Water Quality Permit Fees

This is adopted rule language for WAC 173-201A Water Quality Standards for Surface Waters of the State of Washington

Preliminary Draft EIS for PCB Variances on the Spokane River. Chapter 173-201A WAC.

This is adopted rule language for WAC 173-201A Water Quality Standards