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Water system · PWSID TN0000231

ERWIN UTILITIES AUTHORITY

ERWIN, TN · ~12,236 people served

Check your exact address → ERWIN overview

Fair

PurityRadar safety score

PWSID

TN0000231

State

Tennessee

City

ERWIN

Population served

12,236

Primary source

Score history

▼ 33 points — the score moved from 100 to 67 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 67

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 May 2024). Levels in parts per trillion (ppt).

PFOS

Perfluorooctanesulfonic acid

6.7 ppt

limit 4 ppt

Above EPA limit · 1.7×

PFOA

Perfluorooctanoic acid

4.1 ppt

limit 4 ppt

Above EPA limit · 1.0×

PFHxS

Perfluorohexanesulfonic acid

3.5 ppt

limit 10 ppt

Below EPA limit

Lithium

43,100 ppt

limit —

No federal limit

PFBS

7.5 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jun 2013. Official EPA record →

Monitoring & reporting · Total coliform began Nov 2012 Resolved

Monitoring & reporting · EPA contaminant 0999 began Oct 2012 Resolved

Monitoring & reporting · EPA contaminant 0999 began Oct 2007 Resolved

Max contaminant level (MCL) · Total coliform health-based began Feb 2006 Resolved

Treatment technique · EPA contaminant 0200 health-based began Dec 1996 Resolved

Treatment technique · EPA contaminant 0200 health-based began Nov 1996 Resolved

Treatment technique · EPA contaminant 0200 health-based began Oct 1996 Resolved

Treatment technique · EPA contaminant 0200 health-based began Sep 1996 Resolved

Treatment technique · EPA contaminant 0200 health-based began Aug 1996 Resolved

Treatment technique · EPA contaminant 0200 health-based began Jul 1996 Resolved

Treatment technique · EPA contaminant 0200 health-based began Jun 1996 Resolved

Treatment technique · EPA contaminant 0200 health-based began May 1996 Resolved

Recent enforcement actions

State action · SIF Jun 2013
State action · SOX Jun 2013
State action · SIA Mar 2013
State action · SIE Mar 2013
State action · SOX Mar 2008
State action · SIE Dec 2007
State action · SIA Dec 2007
State action · SIF Apr 2006

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

2 stations · latest Mar 2026

0.21 · max 0.379 mg/L · 22

Manganese

2 stations · latest Mar 2026

12.5 · max 29.9 ug/L · 20

Arsenic

1 station · latest Feb 2026

0.541 · max 0.675 ug/L · 3

Copper

2 stations · latest Nov 2025

0.436 · max 0.485 ug/L · 3

Atrazine

1 station · latest Sep 2022

1.89 · max 1.89 ng/l · 1

Fluoride

1 station · latest Sep 2022

0.04 · max 0.04 mg/l · 1

Lead

1 station · latest Sep 2022

0.043 · max 0.043 ug/l · 1

Uranium

1 station · latest Sep 2022

0.123 · max 0.123 ug/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 TN0000231 — 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.