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Water system · PWSID PA7210029

PA AMERICAN WATER CO WEST

MECHANICSBURG, PA · ~105,127 people served

Check your exact address → MECHANICSBURG overview
65
Fair
PurityRadar safety score

PWSID

PA7210029

State

Pennsylvania

City

MECHANICSBURG

Population served

105,127

Primary source

Surface water

Score history

▼ 35 points — the score moved from 100 to 65 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 65

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

PFOS

Perfluorooctanesulfonic acid

6.2 ppt

limit 4 ppt

Above EPA limit · 1.5×

PFOA

Perfluorooctanoic acid

4.9 ppt

limit 4 ppt

Above EPA limit · 1.2×

PFPeA

3.4 ppt

limit —

No federal limit

PFBS

3.2 ppt

limit —

No federal limit

Violations & enforcement

7

Violations on record

0

Unaddressed

1

Health-based

18

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jun 2023. Official EPA record →

Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2022 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2022 Resolved
Monitoring & reporting · EPA contaminant 0300 began Sep 2019 Resolved
Monitoring & reporting · EPA contaminant 0300 began Jan 2017 Resolved
Monitoring & reporting · Bromate began Apr 2016 Resolved
Monitoring & reporting · EPA contaminant 0600 began Jan 2009 Resolved
Treatment technique · EPA contaminant 0200 health-based began Jul 1993 Resolved

Recent enforcement actions

  • State action · SIF Jun 2023
  • State action · SOX Jul 2022
  • State action · SIE Jul 2022
  • State action · SFJ Jul 2022
  • State action · SOX Dec 2019
  • State action · SIA Dec 2019
  • State action · SOX Mar 2017
  • State action · SIA Mar 2017

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

8 stations · latest Jul 2024

1 · max 6 mg/L · 209

Manganese

2 stations · latest Oct 2024

21 · max 531 ug/L · 203

Copper

2 stations · latest Oct 2024

1.78 · max 15.4 ug/L · 177

Lead

2 stations · latest Aug 2024

0.497 · max 10.5 ug/L · 163

Atrazine

2 stations · latest Sep 2021

0.02 · max 1.26 ug/l · 10

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 PA7210029 — 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.