Tapcensus

Toluene violations in Washington

103 active public water systems in Washington had a Toluene violation in the past three years, 10 of them in the latest quarter of EPA's data. What Toluene is and why it matters.

Health effects: Short-term exposure above the MCL can cause nervous system effects including headache, dizziness, and impaired coordination. Chronic exposure is associated with kidney and liver damage and neurological effects. EPA has not classified toluene as a human carcinogen. Developing fetuses may be particularly sensitive to its neurotoxic effects.

Systems with a Toluene violation

Latest quarter first, then largest first
SystemServesStatusRules violated, 3 yrUnresolved
Red Gate Mobile Home Park
Pierce County 		25 5 0
Twin Pines Mobile Home Park
Okanogan County 		25 7 1
West Deer Lake #1
Island County 		24 5 0
About this data

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