King of Prussia, PA water treatment
What's in King of Prussia's water, who supplies it, and how to fix what you find, with sources. Check your ZIP for your utility's EPA records.
Your water in King of Prussia
ZIP 19406 is mostly served by Aqua Pennsylvania's Main System, a surface-water system serving about 822,600 people across the western suburbs, with Pennsylvania American Water's Norristown system serving part of the ZIP[1]. In EPA's UCMR 5 sampling, Aqua's Main System reported PFOA up to 12.6 ppt and PFOS up to 9.2 ppt, above the 4.0 ppt federal limit that takes effect in 2029 but below Pennsylvania's current limits of 14 and 18 ppt[2][3][4].
EPA records also list one resolved treatment-rule violation for Aqua's Main System, from November 2024. Its latest lead result was 0 ppb at the 90th percentile[1].
Local issues to know
- PFAS: for drinking and cooking water, an NSF/ANSI 53 or 58 certified filter is the usual first step; NJ Department of Health notes these devices have been shown to reduce PFAS below 20 ppt[5]. See PFAS water filters in Pennsylvania.
- Hardness: Aqua's report for this system didn't list a hardness figure we could cite, so we measure it at your tap during the free test[6].
- Wells: about 36% of the ZIP's land lies outside mapped service areas[1]; homes there should test every year[7].
Utility or well? ZIP 19406: about 36% 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 (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)[8]
- 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 King of Prussia homes
Comparing options? See tankless vs. tank reverse osmosis and all five WÜDR systems.
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 King of Prussia
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
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Based on your water report and quiz answers.
King of Prussia water questions
Who supplies water in King of Prussia?
Mostly Aqua Pennsylvania's Main System, with Pennsylvania American Water's Norristown system in part of ZIP 19406.
Is King of Prussia water safe?
Aqua's Main System meets current Pennsylvania standards. Its PFOA and PFOS results were above the 4.0 ppt federal limit that takes effect in 2029, which is why many households add a PFAS filter for drinking water.
How hard is the water?
Aqua's report didn't publish a figure we could cite for this system, so we test hardness free in your home before sizing anything.
Book a free water test in King of Prussia
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
- PA DEP: PFAS MCL rule. www.pa.gov/agencies/dep/programs-and-services/water/bureau-of-safe-drinking-water/drinking-water-management/drinking-water-regulations/pfas-mcl-rule
- NJ Department of Health: PFAS and private wells in New Jersey (July 2025). www.nj.gov/health/ceohs/documents/pfas_well_water.pdf
- U.S. EPA: Consumer Confidence Reports (CCR) information for consumers. www.epa.gov/ccr/ccr-information-consumers
- Pennsylvania DEP: Private well water testing. www.pa.gov/agencies/dep/residents/my-water/private-wells/water-testing
- 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.