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Water system · PWSID OR4100944

WEST LINN, CITY OF

WEST LINN, OR · ~28,000 people served

Check your exact address → WEST LINN overview
100
Excellent
PurityRadar safety score

PWSID

OR4100944

State

Oregon

City

WEST LINN

Population served

28,000

Primary source

SWP

Score history

No change since tracking began Jun 18, 2026.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 100

2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.

PFAS & contaminant readings

No PFAS detections are on record for this system from EPA’s UCMR5 monitoring (2023–25). Absence of a detection isn’t a guarantee — not every system was sampled, and this dataset doesn’t cover other contaminants.

Violations & enforcement

4

Violations on record

0

Unaddressed

0

Health-based

3

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Nov 2016. Official EPA record →

Monitoring & reporting · Total trihalomethanes (TTHM) began Jul 2016 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Jul 2016 Resolved
Monitoring & reporting · Total coliform began Jun 1995 Resolved
Monitoring & reporting · Total coliform began May 1995 Resolved

Recent enforcement actions

  • State action · SOX Nov 2016
  • State action · SOX Jul 2001
  • State action · SOX Jul 2001

Area water-quality monitoring

Environmental monitoring (rivers, wells, intakes) recorded in this system’s service area in the EPA/USGS Water Quality Portal since 2018 — source/ambient water, not finished tap water. Context for the watershed, not a reading from your tap.

ContaminantMedian · max · samples

Nitrate

1 station · latest Dec 2022

1.92 · max 4.65 mg/l as N · 40

Arsenic

1 station · latest Nov 2025

0.825 · max 1.24 ug/L · 18

Manganese

1 station · latest Nov 2025

61.1 · max 159 ug/L · 18

Copper

1 station · latest Nov 2025

2.11 · max 5.02 ug/L · 9

Lead

1 station · latest Nov 2025

0.24 · max 1.08 ug/L · 5

Atrazine

1 station · latest May 2021

10.8 · max 14.9 ng/L · 2

Source: Water Quality Portal (EPA/USGS/state agencies). Values are as-reported and aren’t health thresholds.

This profile is built from EPA public records for system OR4100944 — SDWIS violations and UCMR5 PFAS sampling. The score is system-level and can’t account for your home’s plumbing (older pipes can add lead at the tap). For health decisions, check your exact address, read the utility’s Consumer Confidence Report, and confirm with your provider.