Exton water treatment
What's in Exton'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 Exton
Exton is an unincorporated community in West Whiteland Township, along the Route 100 and Route 30 corridors. Most homes are on Aqua Pennsylvania, through its Uwchlan system or its Main System, with private wells in the less developed edges of the 19341 ZIP, where about a third of the land area lies outside mapped service areas[1].
Aqua's Uwchlan system buys treated water and serves about 35,500 people. It has no health-based violations on record, and its most recent 90th-percentile lead result was 2.2 ppb. Its EPA UCMR 5 samples found PFOA up to 9.3 ppt and PFOS up to 7.1 ppt, above the 4.0 ppt federal limit that takes effect in 2029[2][3].
What that means for an Exton household: if you're on Aqua, your main decision is whether to reduce PFAS at the kitchen tap only or at every tap, and whether hardness from Aqua's report bothers you enough to add a softener. If your home is one of the Exton-area houses on a well, start with a free in-home test, because pH, iron, and corrosivity drive the equipment choice more than anything else.
Local issues to know
- PFAS on Aqua's 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].
- Hardness: check Aqua's annual water quality report for your system[6].
Utility or well? ZIP 19341: about 34% 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 (Uwchlan)
EPA water system ID PA1150035 · serves about 35,518 people · surface water bought from another supplier
- Health violations
- No health-based violations on record[1]
- Lead
- 2.2 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 9.3 ppt, PFOS up to 7.1 ppt, PFPeA up to 7.7 ppt, PFHxA up to 6.7 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[6].
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[6].
Recommended for Exton 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 Exton
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.
Exton water questions
Which utility serves Exton?
Mostly Aqua Pennsylvania. A minority of homes are on private wells.
Does Exton water have PFAS?
Aqua's Uwchlan system reported PFOA up to 9.3 ppt and PFOS up to 7.1 ppt in EPA sampling, above the 4.0 ppt federal limit that takes effect in 2029.
What's the simplest PFAS fix for an Exton home?
For drinking and cooking water, an under-sink reverse osmosis system certified for PFAS reduction. Whole-home options exist if you want every tap covered.
Book a free water test in Exton
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
- U.S. EPA: Consumer Confidence Reports (CCR) information for consumers. www.epa.gov/ccr/ccr-information-consumers
- U.S. EPA: Basic information about lead in drinking water. www.epa.gov/ground-water-and-drinking-water/basic-information-about-lead-drinking-water
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.