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Water system · PWSID OR4100869

THE DALLES, CITY OF

THE DALLES, OR · ~13,010 people served

Check your exact address → THE DALLES overview
100
Excellent
PurityRadar safety score

PWSID

OR4100869

State

Oregon

City

THE DALLES

Population served

13,010

Primary source

Surface water

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

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

Lithium

16,800 ppt

limit —

No federal limit

Violations & enforcement

18

Violations on record

0

Unaddressed

0

Health-based

11

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jan 2024. Official EPA record →

Monitoring & reporting · Lead & Copper Rule began Jul 2023 Resolved
Monitoring & reporting · EPA contaminant 0200 began Jul 2023 Resolved
Monitoring & reporting · Lead & Copper Rule began Jul 2023 Resolved
Monitoring & reporting · Lead & Copper Rule began Jul 2023 Resolved
Monitoring & reporting · Lead & Copper Rule began Jul 2023 Resolved
Monitoring & reporting · Lead & Copper Rule began Jul 2023 Resolved
Monitoring & reporting · EPA contaminant 0200 began Jul 2023 Resolved
Monitoring & reporting · EPA contaminant 0300 began Jul 2023 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2019 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2019 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Oct 2018 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Oct 2018 Resolved

Recent enforcement actions

  • State action · SOX Jan 2024
  • State action · SOX Sep 2023
  • State action · SOX Sep 2023
  • State action · SOX Jun 2019
  • State action · SOX Oct 2014
  • State action · SOX May 2009
  • State action · SOX May 2009
  • State action · SOX Apr 2005

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

2 stations · latest Oct 2025

1.71 · max 3.74 ug/L · 18

Manganese

2 stations · latest Oct 2025

8.37 · max 50.4 ug/L · 18

Copper

2 stations · latest May 2024

3 · max 3.4 ug/L · 4

Lead

2 stations · latest Jun 2020

0.735 · max 1 ug/L · 2

Atrazine

1 station · latest Jul 2020

4.54 · max 4.54 ng/L · 1

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 OR4100869 — 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.