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Water system · PWSID OR4100357

GRESHAM, CITY OF

GRESHAM, OR · ~73,932 people served

Check your exact address → GRESHAM overview
100
Excellent
PurityRadar safety score

PWSID

OR4100357

State

Oregon

City

GRESHAM

Population served

73,932

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

21

Violations on record

0

Unaddressed

0

Health-based

22

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Dec 2022. Official EPA record →

Monitoring & reporting · Haloacetic acids (HAA5) began Jul 2022 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Jul 2022 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Jul 2007 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Jul 2007 Resolved
Monitoring & reporting · Total coliform began Feb 2006 Resolved
Monitoring & reporting · Total coliform began Sep 2002 Resolved
Monitoring & reporting · Total coliform began Jun 2000 Resolved
Monitoring & reporting · Total coliform began Mar 2000 Resolved
Monitoring & reporting · Total coliform began Feb 2000 Resolved
Monitoring & reporting · Total coliform began Nov 1995 Resolved
Monitoring & reporting · Total coliform began Jun 1995 Resolved
Monitoring & reporting · Total coliform began Jan 1995 Resolved

Recent enforcement actions

  • State action · SOX Dec 2022
  • State action · SIF Jan 2017
  • State action · SOX Sep 2008
  • State action · SOX Apr 2006
  • State action · SIF Mar 2005
  • State action · SOX Oct 2002
  • State action · SOX Jul 2002
  • State action · SOX Dec 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

Manganese

1 station · latest Oct 2025

50 · max 87.9 ug/L · 10

Copper

1 station · latest Oct 2025

2.1 · max 11.4 ug/L · 9

Arsenic

1 station · latest Oct 2025

0.405 · max 0.53 ug/L · 6

Lead

1 station · latest Apr 2024

0.29 · max 0.51 ug/L · 3

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 OR4100357 — 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.