Tapcensus

Selenium violations in Oregon

13 active public water systems in Oregon had a Selenium violation in the past three years. What Selenium is and why it matters.

Health effects: Chronic exposure above the MCL causes selenosis — characterized by hair and nail loss, peripheral neuropathy, fatigue, and gastrointestinal disturbance. Liver damage can occur with prolonged high intake. The margin between nutritional requirement and toxic dose is narrow, making the MCL an important threshold.

Systems with a Selenium violation

Latest quarter first, then largest first
SystemServesStatusRules violated, 3 yrUnresolved
Tigard, City of
Washington County
62,500 2 0
Warm Springs Water Treatment Plant
Warm Springs · County
3,800 16 5
Rickreall Water Association
Polk County
1,650 6 0
Interlachen Water Pud
Multnomah County
360 7 0
Area 61
Josephine County
260 8 1
Sunshine Plaza
Jackson County
200 11 1
Burns Paiute
Burns · County
155 13 3
Medford Gold Hill KOA
Jackson County
100 7 0
Currinsville Mobile Home Park
Clackamas County
90 7 2
Nps Oregon Caves National Monument O&m
Josephine County
75 8 0
Galice Subdivision Water CO
Josephine County
33 13 3
Big Oak Marina
Multnomah County
30 9 2
Kashmir Business Park LLC
Marion County
30 7 1
About this data

A system is counted once if any of its violations in the past three years involved Selenium, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Selenium 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 Oregon 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. Retrieved from ECHO on Oct 11, 2026.