Is Thorndale, PA tap water safe?
The short answer
None of the 5 utilities serving Thorndale has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and Pennsylvania’s records.
PA American Coatesville, which serves the most people here, has 1 result above the health goal. The worst: Lead at 2.0 ppb, above the health goal. Health goals are stricter than legal limits and are not enforced.
A town can be served by more than one utility, and some homes are on private wells. The name on your water bill tells you which is yours, and your ZIP code narrows it down. They are listed by how many people each serves in Thorndale’s ZIP codes, from EPA’s estimates.
- Open report
PA American Coatesville
Pennsylvania · serves 36,960 people · about 1,600 in Thorndale
1 result above the health goal. The worst: Lead at 2.0 ppb, above the health goal.
No health-based violations since 2016
- Open report
Aqua PA Uwchlan
Pennsylvania · serves 35,518 people · about 490 in Thorndale
2 results above EPA’s new limit, which takes effect in 2029 and 1 result above the health goal. The worst: PFOA at 32 ppt, above EPA’s new limit, which takes effect in 2029.
No health-based violations since 2016
- Open report
Downingtown Water Authority
Pennsylvania · serves 9,900 people · about 280 in Thorndale
1 result above EPA’s new limit, which takes effect in 2029 and 2 results above the health goal. The worst: PFOS at 4.1 ppt, above EPA’s new limit, which takes effect in 2029.
No health-based violations since 2016
- Open report
Aqua PA Friendship
Pennsylvania · serves 8,800 people · about 240 in Thorndale
2 results above EPA’s new limit, which takes effect in 2029 and 2 results above the health goal. The worst: PFOS at 10 ppt, above EPA’s new limit, which takes effect in 2029.
No health-based violations since 2016
- Open report
Aqua PA Spring Run
Pennsylvania · serves 8,151 people · about 230 in Thorndale
2 results above EPA’s new limit, which takes effect in 2029. The worst: PFOA at 8.9 ppt, above EPA’s new limit, which takes effect in 2029.
No health-based violations since 2016
What handles it
Each of these is certified, on a certifier’s listing, for a result above a line in PA American Coatesville’s water, which serves the most people here. Another utility’s report names what handles its own results.
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Brita Tahoe Pitcher with Elite Filter (OB60, OB06)
Pitcher
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 13, 2026
- IAPMO listing:NSF/ANSI 53checked Oct. 13, 2026
Certified for: Lead
Brita Everyday Pitcher with Elite Filter (OB46, OB06)
Pitcher
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 13, 2026
Certified for: Lead
PUR PLUS 11-Cup Pitcher (PPT111W)
Pitcher
- NSF listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 4, 2026
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 4, 2026
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 4, 2026
Certified for: Lead
Water testing near Thorndale
The 3 labs Pennsylvania certifies closest to Thorndale, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Brandywine Science Center
Kennett Square, PA · about 10 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics
H.O. Thompson Testing Lab
Parkesburg, PA · about 10 miles
Certified for bacteria
Aqua Pennsylvania, Inc.
Bryn Mawr, PA · about 22 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, PFAS, radioactivity
Penn State Agricultural Analytical Services Laboratory: Drinking water test kits from many county Extension offices, mailed back to the lab overnight with payment. Packages cover bacteria and basic chemistry, with add-ons for nitrate, metals, lead, and mining or gas drilling concerns. The standard package of bacteria, pH and total dissolved solids is $60, or $70 with nitrate; bacteria alone is $40, nitrate $15 and lead $25. Drinking Water Testing, Penn State Agricultural Analytical Services Lab.
All 108 certified labs for PennsylvaniaWhich ZIP codes are in Thorndale: Census 2020 relationship files. Which utilities serve them, and how many people: EPA SDWIS and EPA’s service area map. Each utility’s results: EPA UCMR 5, EPA SDWIS, and EPA’s and the state’s compliance monitoring, as its report lists them. How they are measured: methodology. Certified labs: Pennsylvania DEP Laboratory Accreditation Program, accredited labs for drinking water; distances from the Census 2020 ZIP code tabulation area gazetteer.
Near Thorndale
Other towns in Chester County with a page of their own.
What to do next
- Read PA American Coatesville’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- Filters for LeadRanked by certification and what they cost over five years.The best water filters for lead, ranked
- On a private well?No utility tests a well. A certified lab test is the first step.How to test well water