Warren State Hospital
What EPA’s and Pennsylvania’s records show in this utility’s water: PFAS; nitrate, arsenic and other regulated chemicals; lead and copper; and violations since 2016, with the certification that handles each result.
- Serves
- 721 people
- Connections
- 36
- Water source
- Groundwater
- Based in
- North Warren, PA
- County
- Warren
- Owner
- State government
The ZIP code it serves
The short answer
1 result is above EPA’s legal limit, and 2 more are above the health goal. The worst: Lead, above the action level. 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. 31, 2024 to Jan. 7, 2026.
Lead and copper: EPA SDWIS monitoring periods ending 1996 to 2022.
Total trihalomethanes (TTHM), nitrate, haloacetic acids (HAA5), chromium (total), arsenic, fluoride and uranium: Pennsylvania’s own results, samples taken from June 18, 2020 to Aug. 18, 2026, with EPA’s 2012 to 2019 file for earlier years.
PFAS: PFOA, PFOS, PFHxS 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 the health goal0.87 ppt highest, found in 3 of 17 samples. Details |
| PFOS | 4.0 ppt | Above the health goal0.54 ppt highest, found in 3 of 17 samples. Details |
| PFHxS | 10 ppt | Below EPA’s limits0.35 ppt highest, found in 1 of 11 samples. Details |
| PFNA | 10 ppt | Not foundNot found in any of 10 samples |
| HFPO-DA (GenX) | 10 ppt | Not foundNot found in any of 10 samples |
| PFBS | Index only | Below EPA’s limits0.94 ppt highest, found in 3 of 11 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 the legal limit1
Lead
Comes from pipes, often your own
23.7ppb
90th percentile, 2022
In the latest period, 9 in 10 homes sampled were at or below 23.7 ppb, above EPA’s action level of 15 ppb. The action level drops to 10 ppb on Nov. 1, 2027, and this result is at or above that. EPA’s health goal for lead is zero.
What handles it
- NSF/ANSI 53 look for “Lead Reduction”
- NSF/ANSI 58 look for “Lead Reduction”
Above the health goal2
PFOA
Comes from the source
0.87ppt
Highest sample, Feb. 5, 2025; found in 3 of 17
2026: not found
The highest sample was 0.87 ppt: below EPA’s new limit of 4.0 ppt, which takes effect in 2029, but above its health goal of zero. Averaged over four quarters at one entry point, the way both Pennsylvania’s limit and EPA’s are judged, the highest was 0.19 ppt, for the year to March 31, 2025: below Pennsylvania’s limit of 14 ppt and below EPA’s new limit of 4.0 ppt. In 2026, the latest year on file, it wasn’t found in any of its two samples.
What handles it
- NSF/ANSI 53 look for “PFOA Reduction”
- NSF/ANSI 58 look for “Perfluorooctanoic Acid (PFOA)”
PFOS
Comes from the source
0.54ppt
Highest sample, Feb. 5, 2025; found in 3 of 17
2026: not found
The highest sample was 0.54 ppt: below EPA’s new limit of 4.0 ppt, which takes effect in 2029, but above its health goal of zero. Averaged over four quarters at one entry point, the way both Pennsylvania’s limit and EPA’s are judged, the highest was 0.12 ppt, for the year to March 31, 2025: below Pennsylvania’s limit of 18 ppt and below EPA’s new limit of 4.0 ppt. In 2026, the latest year on file, it wasn’t found in any of its two samples.
What handles it
- NSF/ANSI 53 look for “PFOS Reduction”
- NSF/ANSI 58 look for “Perfluorooctane Sulfonate (PFOS)”
Below EPA’s limits6
Total trihalomethanes (TTHM)
Forms or is added in treatment
42.9ppb
Highest yearly average, 2020 to 2026
2026, one sample: 13.8 ppb
Averaged by year, the highest was 42.9 ppb, in 2024, below EPA’s legal limit of 80 ppb. In 2026, the latest year on file, its one sample was 13.8 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 9.2 ppb, in 2013.
What handles it
- NSF/ANSI 53 look for “Trihalomethanes (TTHM) Reduction”
- NSF/ANSI 58 look for “Trihalomethanes (TTHM) Reduction”
Nitrate
Comes from the source
3.1ppm
Highest sample; found in 23 of 23
2025 average: 1.6 ppm
The highest sample, in 2022, was 3.1 ppm, below EPA’s legal limit of 10 ppm. In 2025, the latest year on file, its six samples averaged 1.6 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 4.1 ppm, in 2012.
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
0.35ppt
Highest sample, Feb. 5, 2025; found in 1 of 11
2026: not found
The highest sample was 0.35 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 0.044 ppt, for the year to Sept. 30, 2025: below EPA’s new limit of 10 ppt. In 2026, the latest year on file, it wasn’t found in any of its two samples.
What handles it
- NSF/ANSI 53 look for “Total PFAS Reduction”
Haloacetic acids (HAA5)
Forms or is added in treatment
1.5ppb
Highest yearly average, 2020 to 2026
Averaged by year, the highest was 1.5 ppb, in 2026, below EPA’s legal limit of 60 ppb. Its highest single sample was 3.0 ppb. That was also the latest year on file. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 3.3 ppb, in 2014.
What handles it
No certification claim covers this compound yet.
Chromium (total)
Comes from the source
1.5ppb
Highest yearly average, 2021 to 2024
Averaged by year, the highest was 1.5 ppb, in 2024, below EPA’s legal limit of 100 ppb. Its highest single sample was 2.5 ppb. That was also the latest year on file.
What handles it
- NSF/ANSI 58 look for “Chromium (Hexavalent) Reduction”
- NSF/ANSI 53 look for “Chromium Reduction”
PFBS
Comes from the source
0.94ppt
Highest sample, Feb. 5, 2025; found in 3 of 11
2026: not found
The highest sample was 0.94 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, it wasn’t found in any of its two samples.
What handles it
- NSF/ANSI 53 look for “Total PFAS Reduction”
5 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
From routine monitoring
- Arsenic
- Fluoride
- Uranium
PFAS, from Pennsylvania’s own monitoring
- HFPO-DA (GenX)
- PFNA
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: Lead Reduction, PFOA Reduction, PFOS Reduction
For: Lead, PFOA, PFOS
Other certifiers’ wording: Total PFAS Reduction; Perfluorooctanoic Acid (PFOA); Perfluorooctane Sulfonate (PFOS)
- NSF/ANSI 58
Claims: Lead Reduction, Perfluorooctanoic Acid (PFOA), Perfluorooctane Sulfonate (PFOS)
For: Lead, PFOA, PFOS
At the tap, or for the whole house?
Lead and copper usually come from pipes and fixtures inside or near your home. A whole-house system sits where water enters, so it cannot catch what your own plumbing adds after it. For those, the filter that counts is the one at the tap. 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
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, PFOA, PFOS
ZeroWater 10 Cup Pitcher (ZP-010)
Pitcher
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53checked Oct. 4, 2026
Certified for: Lead, PFOA, PFOS
Culligan 10-Cup Pitcher with ZeroWater Technology (ZEROP10)
Pitcher
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 9, 2026
Certified for: Lead, PFOA, PFOS
Culligan MaxClear Scout Gravity Water Filter (MCS701P)
Dispenser
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 9, 2026
Certified for: Lead, PFOA, PFOS
Aquasana Clean Water Machine (AQ-CWM2)
Countertop
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 9, 2026
Certified for: Lead, PFOA, PFOS
Violations since 2016
No health-based violations on file with EPA since 2016. There are 19 monitoring or reporting violations: a sample missed, late or not reported.
What this report can’t tell you
Everything else. Total trihalomethanes (TTHM), nitrate, haloacetic acids (HAA5), chromium (total), arsenic, fluoride and uranium results here are Pennsylvania’s own from 2020 on, with EPA’s national file for 2012 to 2019. Warren State Hospital’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 June 18, 2020 to Aug. 18, 2026; Pennsylvania’s PFAS results run from Jan. 31, 2024 to Jan. 7, 2026.
Testing your own tap
The 3 labs Pennsylvania certifies closest to the area Warren State Hospital serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
White Oak Laboratory LLC
Ridgway, PA · about 36 miles
Certified for bacteria, nitrate, minerals and other inorganics
Cattaraugus County Department of Health Laboratory
Olean, NY · about 42 miles
Certified for bacteria
Microbac Laboratories, Inc - Erie Division
Erie, PA · about 45 miles
Certified for bacteria
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 PA6620034. Rebuilt from EPA data on Oct. 18, 2026.
What to do next
- Read up on the 3 results above a lineWhat each one does to health, where it comes from, and the certification claim that addresses it.Start with Lead
- Get the utility’s own reportWarren State Hospital 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