LEWISTON WATER & SEWER DIVISION

LEWISTON, ME · ~23,720 people served

Check your exact address → LEWISTON overview

100

Excellent

PurityRadar safety score

PWSID

ME0090830

State

Maine

City

LEWISTON

Population served

23,720

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 Sep 2011. Official EPA record →

Treatment technique · EPA contaminant 0300 health-based began Aug 2007 Resolved

Max contaminant level (MCL) · Total coliform health-based began Jun 2007 Resolved

Treatment technique · EPA contaminant 0200 health-based began Jul 2006 Resolved

Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Jan 2006 Resolved

Treatment technique · EPA contaminant 0200 health-based began Aug 1998 Resolved

Recent enforcement actions

State action · SO6 Sep 2011
State action · SOX Sep 2011
State action · SFK May 2009
State action · SOX May 2009
State action · SOX Oct 2007
State action · SIF Oct 2007
State action · SIF Sep 2007
State action · SIE Sep 2007

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 Jul 2023

0.06 · max 0.06 mg/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 ME0090830 — 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.