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Water system · PWSID OR4100528

MILWAUKIE, CITY OF

MILWAUKIE, OR · ~20,946 people served

Check your exact address → MILWAUKIE overview

Excellent

PurityRadar safety score

PWSID

OR4100528

State

Oregon

City

MILWAUKIE

Population served

20,946

Primary source

Groundwater

Score history

▼ 9 points — the score moved from 100 to 91 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 91

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

PFAS & contaminant readings

Latest detections from EPA’s UCMR5 monitoring (through Oct 2024). Levels in parts per trillion (ppt).

PFOS

Perfluorooctanesulfonic acid

4.2 ppt

limit 4 ppt

Above EPA limit · 1.0×

Violations & enforcement

219

Violations on record

Unaddressed

Health-based

130

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jun 2025. Official EPA record →

Monitoring · Lead & Copper Rule began Apr 2025 Resolved

Monitoring & reporting · EPA contaminant 2380 began Jan 2024 Resolved

Monitoring & reporting · EPA contaminant 2987 began Jan 2024 Resolved

Monitoring & reporting · EPA contaminant 3028 began Jan 2024 Resolved

Monitoring & reporting · EPA contaminant 2984 began Jan 2024 Resolved

Monitoring & reporting · EPA contaminant 3028 began Jan 2024 Resolved

Monitoring & reporting · EPA contaminant 3014 began Oct 2023 Resolved

Other · EPA contaminant 7000 began Jul 2023 Resolved

Monitoring & reporting · Lead & Copper Rule began Oct 2022 Resolved

Monitoring & reporting · EPA contaminant 2987 began Jul 2022 Resolved

Monitoring & reporting · EPA contaminant 2984 began Jul 2022 Resolved

Monitoring & reporting · EPA contaminant 2380 began Jul 2022 Resolved

Recent enforcement actions

State action · SOX Jun 2025
State action · SOX Jun 2025
State action · SOX Apr 2025
State action · SOX Apr 2025
State action · SOX Apr 2025
State action · SOX Apr 2025
State action · SOX Apr 2025
State action · SOX Apr 2025

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

Arsenic

1 station · latest May 2021

0.69 · max 0.77 ug/L · 8

Manganese

1 station · latest May 2021

23 · max 63.6 ug/L · 8

Lead

1 station · latest May 2021

0.38 · max 0.56 ug/L · 4

Copper

1 station · latest Feb 2021

1.85 · max 1.97 ug/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 OR4100528 — 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.