West Chester water treatment
What's in West Chester's water, where it comes from, and how to fix what you find. Check your ZIP for your utility's EPA records.
Your water in West Chester
West Chester is the Chester County seat, and the borough and surrounding townships are mostly served by Aqua Pennsylvania's West Chester system, which serves about 48,600 people, and parts of Aqua's much larger Main System[1]. South of town, in Westtown, Thornbury, and Birmingham townships, more of the land lies outside mapped service areas, so private wells are common.
EPA records show no health-based violations for Aqua's West Chester system and a 90th-percentile lead result of 0 ppb. Its UCMR 5 samples found PFOA up to 5.9 ppt. Aqua's Main System reported PFOA up to 12.6 ppt and PFOS up to 9.2 ppt[2]. Both are above the 4.0 ppt federal limit that takes effect in 2029[3].
Local issues to know
- PFAS on both Aqua systems, as above.
- Corrosive wells: 83.3% of Chester County well samples tested for corrosivity by Penn State were outside the non-corrosive range[4], which can cause blue-green stains and leach metals from plumbing[5].
- Radon: 14% of 1,041 USGS-sampled Pennsylvania wells exceeded 4,000 pCi/L[6].
Utility or well? ZIP 19380: about 35% of the land area; ZIP 19382: about 57% of the land area lies outside mapped public water service areas[1]. Homes in those areas are likely on private wells, which no utility tests. If that's you, start with a free in-home test.
Utility records
Aqua Pennsylvania (West Chester)
EPA water system ID PA1150098 · serves about 48,600 people · surface water (rivers, streams, or reservoirs)
- Health violations
- No health-based violations on record[1]
- Lead
- 0 ppb at the 90th percentile of its most recent lead sampling (EPA action level: 15 ppb)[7]
- PFAS
- EPA UCMR 5 sampling found PFOA up to 5.9 ppt, PFPeA up to 7.4 ppt, PFHxA up to 7.2 ppt, PFBA up to 5.7 ppt, so PFOA was above the 4.0 ppt federal limit that takes effect in 2029.[2]
Full EPA record for this system · Ask the utility for its annual Consumer Confidence Report (CCR) for hardness and other details[8].
Aqua Pennsylvania (Main System)
EPA water system ID PA1460073 · serves about 822,600 people · surface water (rivers, streams, or reservoirs)
- Health violations
- 1 health-based violation in the last three years (water treatment rule (filtration / disinfection), Nov 2024, resolved); 1 older on record[1]
- Lead
- 0 ppb at the 90th percentile of its most recent lead sampling (EPA action level: 15 ppb)[7]
- PFAS
- EPA UCMR 5 sampling found PFOA up to 12.6 ppt, PFOS up to 9.2 ppt, PFPeA up to 21.8 ppt, PFHxA up to 17.2 ppt, so PFOA and PFOS were above the 4.0 ppt federal limit that takes effect in 2029.[2]
Full EPA record for this system · Ask the utility for its annual Consumer Confidence Report (CCR) for hardness and other details[8].
Recommended for West Chester homes
How it works
- Analysis: your free ZIP report and quiz, or a free in-home test (always, for wells).
- Recommendation: a system matched to your results.
- Price: shown only after the analysis.
- Install: buy on your own or talk it through first.
Check your water in West Chester
Look up what your local water utility has reported to the EPA, then take a 60-second quiz about what you see, taste, and smell at home. We'll use both to recommend the right solution.
Get your water report
Enter your ZIP code to see your utility's violations, lead testing, and PFAS results from public EPA records, explained in plain English.
Data comes from U.S. EPA and Census public records. It covers public water systems, not private wells, and it isn't a test of your home's tap. If you're on a well, a free in-home test is the best way to know what's in your water.
Water self-check quiz
Question 1 of 8Step 2
Your recommended solution
Based on your water report and quiz answers.
West Chester water questions
Which utility serves West Chester?
Most of the borough is on Aqua Pennsylvania. Some surrounding areas are on Aqua's Main System or private wells. Your bill shows which.
Is West Chester water hard?
Check Aqua Pennsylvania's annual water quality report for your system, or book a free in-home test to measure it at your tap.
I'm on a well in Westtown or Thornbury. What should I test?
Bacteria, nitrate, pH and corrosivity, and radon are good starting points. Chester County lists certified labs, and we can do a free in-home test for treatment basics.
Book a free water test in West Chester
Sources
- U.S. EPA: SDWIS Federal Reports (violations, lead and copper results). sdwis.epa.gov/ords/sfdw_pub/r/sfdw/sdwis_fed_reports_public/200
- U.S. EPA: UCMR occurrence data. www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule
- U.S. EPA: Proposed PFOA and PFOS compliance extension rule. www.epa.gov/sdwa/proposed-pfoa-and-pfos-compliance-extension-rule
- Penn State AASL: Chester County drinking water test summary. agsci.psu.edu/aasl/water-testing/drinking-water-testing/drinking-water-test-summaries/chester
- Penn State Extension: Corrosive water problems. extension.psu.edu/corrosive-water-problems
- USGS: High levels of radon found in some wells across Pennsylvania. www.usgs.gov/news/state-news-release/high-levels-radon-found-some-wells-across-pennsylvania
- U.S. EPA: Basic information about lead in drinking water. www.epa.gov/ground-water-and-drinking-water/basic-information-about-lead-drinking-water
- U.S. EPA: Consumer Confidence Reports (CCR) information for consumers. www.epa.gov/ccr/ccr-information-consumers
EPA records retrieved Oct 2026 from the EPA SDWIS and UCMR 5 public datasets. Utility records describe a water system, not the tap in your home. Records can lag and may be incomplete.