Elverson Water Company
What EPA’s and Pennsylvania’s records show in this utility’s water: PFAS; nitrate, arsenic and other regulated chemicals; and violations since 2016, with the certification that handles each result.
- Serves
- 1,641 people
- Connections
- 597
- Water source
- Groundwater
- Based in
- Elverson, PA
- County
- Chester
- Owner
- Private
The ZIP code it serves
The short answer
2 results are above EPA’s new limit, which takes effect in 2029. The worst: PFOS, above EPA’s new limit (2029). No health-based violations on file since 2016.
What handles itWhat was found
PFAS: Pennsylvania’s own results under its PFAS rule, entry point samples taken from Jan. 18, 2024 to Sept. 15, 2026.
Nitrate, haloacetic acids (HAA5), total trihalomethanes (TTHM), fluoride, arsenic, chromium (total) and uranium: Pennsylvania’s own results, samples taken from Jan. 15, 2020 to Sept. 15, 2026, with EPA’s 2012 to 2019 file for earlier years.
PFAS: PFOS, PFOA, PFHxS, PFNA and PFBS were found, of the six PFAS in EPA’s 2024 drinking water rule; their results are below.
EPA’s 2024 PFAS rule, compound by compound
| PFAS | EPA’s limit | Result |
|---|---|---|
| PFOA | 4.0 ppt | Above EPA’s new limit (2029)8.9 ppt highest, found in 26 of 26 samples. Details |
| PFOS | 4.0 ppt | Above EPA’s new limit (2029)10.7 ppt highest, found in 20 of 26 samples. Details |
| PFHxS | 10 ppt | Below EPA’s limits4.0 ppt highest, found in 16 of 22 samples. Details |
| PFNA | 10 ppt | Below EPA’s limits4.0 ppt highest, found in 15 of 22 samples. Details |
| HFPO-DA (GenX) | 10 ppt | Not foundNot found in any of 18 samples |
| PFBS | Index only | Below EPA’s limits6.8 ppt highest, found in 22 of 22 samples. Details |
| Results from Pennsylvania’s own PFAS monitoring, samples where water enters the pipes; each compound’s card has its four-quarter averages, the way limits are judged. The limits are EPA’s 2024 rule, with compliance due from 2029; EPA has since proposed changes to some of them, explained on each compound’s page. Pennsylvania’s own limits for PFOA and PFOS are in force now. PFBS has no limit of its own and counts only toward EPA’s Hazard Index, which TapBuff works out only from UCMR 5’s averages, so it isn’t given here. | ||
About PFAS certifications
NSF’s PFAS claims are tested to below 20 ppt. EPA’s limit is 4.0 ppt, and EPA says no certification yet shows a filter reaching its levels.
Above EPA’s new limit, which takes effect in 20292
PFOS
Comes from the source
10.7ppt
Highest sample, March 18, 2026; found in 20 of 26
2026 average: 7.2 ppt
The highest sample was 10.7 ppt, about 2.7 times EPA’s new limit of 4.0 ppt, which takes effect in 2029. EPA’s health goal is zero. Compliance will be judged on a running annual average, not one sample. Averaged over four quarters at one entry point, the way both Pennsylvania’s limit and EPA’s are judged, the highest was 10.0 ppt, for the year to Sept. 30, 2026: below Pennsylvania’s limit of 18 ppt and above EPA’s new limit of 4.0 ppt. In 2026, the latest year on file, its six samples averaged 7.2 ppt.
What handles it
- NSF/ANSI 53 look for “PFOS Reduction”
- NSF/ANSI 58 look for “Perfluorooctane Sulfonate (PFOS)”
PFOA
Comes from the source
8.9ppt
Highest sample, March 18, 2026; found in 26 of 26
2026 average: 6.9 ppt
The highest sample was 8.9 ppt, about twice EPA’s new limit of 4.0 ppt, which takes effect in 2029. EPA’s health goal is zero. Compliance will be judged on a running annual average, not one sample. Averaged over four quarters at one entry point, the way both Pennsylvania’s limit and EPA’s are judged, the highest was 7.8 ppt, for the year to Sept. 30, 2026: below Pennsylvania’s limit of 14 ppt and above EPA’s new limit of 4.0 ppt. In 2026, the latest year on file, its six samples averaged 6.9 ppt.
What handles it
- NSF/ANSI 53 look for “PFOA Reduction”
- NSF/ANSI 58 look for “Perfluorooctanoic Acid (PFOA)”
Below EPA’s limits7
Nitrate
Comes from the source
7.2ppm
Highest sample; found in 40 of 40
2026 average: 5.1 ppm
The highest sample, in 2024, was 7.2 ppm, below EPA’s legal limit of 10 ppm. In 2026, the latest year on file, its six samples averaged 5.1 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 6.2 ppm, in 2015.
What handles it
- NSF/ANSI 58 look for “Nitrate/Nitrite Reduction”
- NSF/ANSI 53 look for “Nitrate/Nitrite (30 ppm challenge)”
PFHxS
Comes from the source
4.0ppt
Highest sample, Dec. 18, 2025; found in 16 of 22
2026 average: 2.5 ppt
The highest sample was 4.0 ppt, below EPA’s new limit of 10 ppt, which takes effect in 2029. Averaged over four quarters at one entry point, the way EPA’s limit is judged, the highest was 3.5 ppt, for the year to Sept. 30, 2026: below EPA’s new limit of 10 ppt. In 2026, the latest year on file, its six samples averaged 2.5 ppt.
What handles it
- NSF/ANSI 53 look for “Total PFAS Reduction”
PFNA
Comes from the source
4.0ppt
Highest sample, Sept. 15, 2026; found in 15 of 22
2026 average: 2.6 ppt
The highest sample was 4.0 ppt, below EPA’s new limit of 10 ppt, which takes effect in 2029. Averaged over four quarters at one entry point, the way EPA’s limit is judged, the highest was 3.5 ppt, for the year to Sept. 30, 2026: below EPA’s new limit of 10 ppt. In 2026, the latest year on file, its six samples averaged 2.6 ppt.
What handles it
- NSF/ANSI 53 look for “Total PFAS Reduction”
Haloacetic acids (HAA5)
Forms or is added in treatment
16.6ppb
Highest yearly average, 2020 to 2026
2026, one sample: 2.1 ppb
Averaged by year, the highest was 16.6 ppb, in 2022, below EPA’s legal limit of 60 ppb. In 2026, the latest year on file, its one sample was 2.1 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 3.1 ppb, in 2019.
What handles it
No certification claim covers this compound yet.
Total trihalomethanes (TTHM)
Forms or is added in treatment
16.8ppb
Highest yearly average, 2020 to 2026
2026, one sample: 9.8 ppb
Averaged by year, the highest was 16.8 ppb, in 2023, below EPA’s legal limit of 80 ppb. Its highest single sample was 17 ppb. In 2026, the latest year on file, its one sample was 9.8 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 12.6 ppb, in 2019.
What handles it
- NSF/ANSI 53 look for “Trihalomethanes (TTHM) Reduction”
- NSF/ANSI 58 look for “Trihalomethanes (TTHM) Reduction”
Fluoride
Forms or is added in treatment
0.14ppm
Highest yearly average, 2021 to 2024
2024: not found
Averaged by year, the highest was 0.14 ppm, in 2021, below EPA’s legal limit of 4.0 ppm. Its highest single sample was 0.28 ppm. In 2024, the latest year on file, it wasn’t found in any of its two samples. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 0.3 ppm, in 2012.
What handles it
- NSF/ANSI 58 look for “Fluoride Reduction”
- NSF/ANSI 53 look for “Fluoride”
PFBS
Comes from the source
6.8ppt
Highest sample, June 18, 2025; found in 22 of 22
2026 average: 5.1 ppt
The highest sample was 6.8 ppt, below EPA’s hazard index benchmark of 2,000 ppt. PFBS has no legal limit or health goal of its own. In 2026, the latest year on file, its six samples averaged 5.1 ppt.
What handles it
- NSF/ANSI 53 look for “Total PFAS Reduction”
4 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
From routine monitoring
- Arsenic
- Chromium (total)
- Uranium
PFAS, from Pennsylvania’s own monitoring
- HFPO-DA (GenX)
What handles it
A certification covers specific claims, not a whole standard. Look for these claims on the certifier’s listing, not the box. Wording varies a little: NSF writes “Lead Reduction,” WQA just “Lead.”
- NSF/ANSI 53
Claims: PFOS Reduction, PFOA Reduction
For: PFOS, PFOA
Other certifiers’ wording: Total PFAS Reduction; Perfluorooctane Sulfonate (PFOS); Perfluorooctanoic Acid (PFOA)
- NSF/ANSI 58
Claims: Perfluorooctane Sulfonate (PFOS), Perfluorooctanoic Acid (PFOA)
For: PFOS, PFOA
At the tap, or for the whole house?
These come with the water itself, so a whole-house system certified for the same claims treats every tap and shower. A filter at the tap treats drinking water for much less. How whole-house systems compare.
Filters with those claims on a certifier’s listing
Disclosure: TapBuff earns a commission if you buy through some links on this page. It does not change which standard or filter we name. As an Amazon Associate, TapBuff earns from qualifying purchases. How TapBuff makes money
ZeroWater 10 Cup Pitcher (ZP-010)
Pitcher
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53checked Oct. 4, 2026
Certified for: PFOS, PFOA
Aquasana Claryum Direct Connect (AQ-MF-1)
Under-sink carbon
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 16, 2026
Certified for: PFOS, PFOA
Express Water StreamLine Direct Connect System (USC001)
Under-sink carbon
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 16, 2026
Certified for: PFOS, PFOA
Under-sink reverse osmosis
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58checked Oct. 4, 2026
Certified for: PFOS, PFOA
Under-sink reverse osmosis
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58checked Oct. 9, 2026
Certified for: PFOS, PFOA
Violations since 2016
No health-based violations on file with EPA since 2016. There are 21 monitoring or reporting violations: a sample missed, late or not reported.
What this report can’t tell you
Everything else. Nitrate, haloacetic acids (HAA5), total trihalomethanes (TTHM), fluoride, arsenic, chromium (total) and uranium results here are Pennsylvania’s own from 2020 on, with EPA’s national file for 2012 to 2019. Elverson Water Company’s own annual report, which it must send you every year, has the contaminants this page does not show.
Your own plumbing. Lead results are the 90th percentile across homes the utility samples. Your home’s service line, solder and fixtures decide yours. A certified lab test is the only way to know.
What it means for your health. This page reports what the records show and EPA’s limits and goals; it is not medical advice. If you are worried about a health effect, talk to a doctor or your local health department.
Anything after the latest data. SDWIS data is from 2026 Q3; UCMR 5 didn’t sample this utility; Pennsylvania’s results run from Jan. 15, 2020 to Sept. 15, 2026; Pennsylvania’s PFAS results run from Jan. 18, 2024 to Sept. 15, 2026.
Testing your own tap
The 3 labs Pennsylvania certifies closest to the area Elverson Water Company serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
M. J. Reider Associates Inc
Reading, PA · about 14 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, PFAS
H.O. Thompson Testing Lab
Parkesburg, PA · about 15 miles
Certified for bacteria
SPL - Reading
Reading, PA · about 18 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 PennsylvaniaSources
- EPA UCMR 5 occurrence data, file of Oct. 15, 2026
- Pennsylvania Department of Environmental Protection, Drinking Water Reporting System, PFAS results read Oct. 17, 2026
- EPA SDWA bulk download (SDWIS federal data), 2026 Q3
- Pennsylvania Department of Environmental Protection, Drinking Water Reporting System, results from Jan. 2, 2020 to Oct. 8, 2026, read Oct. 17, 2026
- EPA Six-Year Review 4 compliance monitoring data, 2012 to 2019, file of Feb. 5, 2024
- Certified labs: Pennsylvania DEP Laboratory Accreditation Program, accredited labs for drinking water, read Oct. 11, 2026; distances from the Census 2020 ZIP code tabulation area gazetteer
- Limits and goals: each contaminant’s page, with its EPA source.
- How this page is built: methodology.
PWSID PA1150191. Rebuilt from EPA data on Oct. 18, 2026.
What to do next
- Read up on the 2 results above a lineWhat each one does to health, where it comes from, and the certification claim that addresses it.Start with PFOS
- Get the utility’s own reportElverson Water Company must send you a water quality report every year. It covers contaminants this page does not show.How to read it
- Test your own tap for leadYour service line, solder and fixtures decide the lead at your faucet, not the utility’s average.Lead in your water: what to do
- Compare certified filtersWhat the filters certified for these results cost over five years, cartridges included.Compare five-year costs