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Water system · PWSID PA7210002

CARLISLE WATER TRMT PLT

CARLISLE, PA · ~26,000 people served

Check your exact address → CARLISLE overview

Fair

PurityRadar safety score

PWSID

PA7210002

State

Pennsylvania

City

CARLISLE

Population served

26,000

Primary source

Surface water

Score history

▼ 45 points — the score moved from 100 to 55 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 55

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 Nov 2023). Levels in parts per trillion (ppt).

PFOS

Perfluorooctanesulfonic acid

7.7 ppt

limit 4 ppt

Above EPA limit · 1.9×

PFOA

Perfluorooctanoic acid

5 ppt

limit 4 ppt

Above EPA limit · 1.3×

PFBS

7.2 ppt

limit —

No federal limit

PFBA

5.2 ppt

limit —

No federal limit

PFHxA

5.1 ppt

limit —

No federal limit

PFPeA

3.9 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

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

Monitoring & reporting · EPA contaminant 0200 began Aug 2024 Resolved

Monitoring & reporting · EPA contaminant 0999 began Aug 2024 Resolved

Other · EPA contaminant 7500 began Apr 2024 Resolved

Monitoring & reporting · Bromate began Apr 2023 Resolved

Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2023 Resolved

Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2023 Resolved

Monitoring & reporting · EPA contaminant 0300 began Mar 2022 Resolved

Monitoring & reporting · Bromate began Jan 2022 Resolved

Monitoring & reporting · EPA contaminant 0999 began Nov 2021 Resolved

Monitoring · Lead & Copper Rule began Nov 2021 Resolved

Monitoring & reporting · EPA contaminant 0200 began Nov 2021 Resolved

Recent enforcement actions

State action · SOX Apr 2025
State action · SOX Oct 2024
State action · SIA Oct 2024
State action · SIA May 2024
State action · SIE May 2024
State action · SIF May 2024
State action · SOX May 2024
State action · SIA Jul 2023

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 Dec 2021

4.25 · max 6.1 mg/L · 24

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 PA7210002 — 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.