WINSTON-DILLARD WATER DISTRICT

WINSTON, OR · ~8,300 people served

Check your exact address → WINSTON overview

100

Excellent

PurityRadar safety score

PWSID

OR4100957

State

Oregon

City

WINSTON

Population served

8,300

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

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

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jun 2019. Official EPA record →

Monitoring · Lead & Copper Rule began May 2019 Resolved

Other · EPA contaminant 7500 began Nov 2014 Resolved

Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jul 2014 Resolved

Monitoring & reporting · EPA contaminant 0200 began Jun 2009 Resolved

Monitoring & reporting · EPA contaminant 0300 began Jun 2009 Resolved

Monitoring & reporting · Total coliform began Apr 2008 Resolved

Monitoring & reporting · Total coliform began Jul 2007 Resolved

Monitoring & reporting · Total trihalomethanes (TTHM) began Apr 2007 Resolved

Monitoring & reporting · Haloacetic acids (HAA5) began Apr 2007 Resolved

Monitoring & reporting · Total coliform began Aug 2006 Resolved

Monitoring & reporting · EPA contaminant 2968 began Jan 2006 Resolved

Monitoring & reporting · EPA contaminant 2980 began Jan 2006 Resolved

Recent enforcement actions

State action · SOX Jun 2019
State action · SOX Apr 2015
State action · SOX Dec 2014
State action · SIF Nov 2014
State action · SIE Oct 2014
State action · SIA Aug 2009
State action · SOX Aug 2009
State action · SOX Aug 2009

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 Nov 2022

19.7 · max 19.7 ug/L · 2

Manganese

1 station · latest Nov 2022

0.431 · max 0.442 mg/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 OR4100957 — 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.