Tapcensus

E. coli (Escherichia coli) violations in Washington

7 active public water systems in Washington had a E. coli (Escherichia coli) violation in the past three years, 6 of them in the latest quarter of EPA's data. What E. coli (Escherichia coli) is and why it matters.

Health effects: Most E. coli strains cause diarrheal illness. Some strains (e.g., O157:H7) produce toxins causing severe bloody diarrhea, hemolytic uremic syndrome (HUS — a form of kidney failure), and death — especially in children under 5 and the elderly. Even non-pathogenic strains in drinking water indicate that disease-causing organisms may also be present.

Systems with a E. coli (Escherichia coli) violation

Latest quarter first, then largest first
SystemServesStatusRules violated, 3 yrUnresolved
Blueberries
Wapato · County 		550 2 1
Campbell Farm
Wapato · County 		320 3 1
Rainbow Beach Resort
Coulee Dam · County 		158 4 2
Hoh Tribe
Forks · County 		120 9 1
Sauk-Suiattle
Darrington · County 		80 7 3
Pepperfield Village
Wapato · County 		40 3 1
River Rock Tobacco and Fuel
Arlington · County 		2,117 4 1
About this data

A system is counted once if any of its violations in the past three years involved E. coli (Escherichia coli), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not E. coli (Escherichia coli) alone.

Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Washington records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet.