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Water system · PWSID OR4100878

TIGARD, CITY OF

TIGARD, OR · ~62,500 people served

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

PWSID

OR4100878

State

Oregon

City

TIGARD

Population served

62,500

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

9

Violations on record

0

Unaddressed

1

Health-based

11

Enforcement actions

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

Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2025 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2025 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Jul 2020 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Jul 2020 Resolved
Max contaminant level (MCL) · Total coliform health-based began Nov 2012 Resolved
Monitoring & reporting · Arsenic began Jan 2005 Resolved
Monitoring & reporting · Arsenic began Jan 2002 Resolved
Monitoring & reporting · Total coliform began Dec 1994 Resolved
Monitoring & reporting · Total coliform began Jun 1993 Resolved

Recent enforcement actions

  • State action · SOX Jun 2025
  • State action · SOX Nov 2020
  • State action · SOX Jun 2013
  • State action · SIA Dec 2012
  • State action · SIE Nov 2012
  • State action · SIF Nov 2012
  • State action · SIF Jul 2012
  • State action · SOX Jun 2008

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 Aug 2023

0.386 · max 1.25 mg/l as N · 298

Arsenic

1 station · latest Dec 2023

1.1 · max 2.6 ug/l · 114

Fluoride

1 station · latest Dec 2023

0.1 · max 0.16 mg/l · 92

Copper

1 station · latest Dec 2023

1.5 · max 4 ug/l · 91

Manganese

1 station · latest Oct 2022

175 · max 380 ug/l · 22

Atrazine

1 station · latest Oct 2023

1.98 · max 6.8 ng/l · 20

Lead

1 station · latest Oct 2022

0.3 · max 1 ug/l · 11

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 OR4100878 — 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.