Big Boulder MHP
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
- 40 people
- Connections
- 17
- Water source
- Groundwater
- Based in
- Coatesville, PA
- County
- Lebanon
- Owner
- Private
The ZIP code it serves
The short answer
1 result is above EPA’s new limit, which takes effect in 2029, and 2 more are above the health goal. 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 March 20, 2025 to Nov. 6, 2025.
Lead and copper: EPA SDWIS monitoring periods ending 1993 to 1996.
Copper: EPA’s file records a utility’s copper only when it exceeds the action level. The last here was 2.1 ppm, for the period ending Dec. 31, 2004. None since is on file, so it is not counted as a current finding.
Nitrate, haloacetic acids (HAA5), total trihalomethanes (TTHM), arsenic, chromium (total), fluoride and uranium: Pennsylvania’s own results, samples taken from Jan. 2, 2020 to Oct. 1, 2026, with EPA’s 2012 to 2019 file for earlier years.
PFAS: PFOS, PFOA 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 goal2.8 ppt highest, found in 4 of 4 samples. Details |
| PFOS | 4.0 ppt | Above EPA’s new limit (2029)4.8 ppt highest, found in 3 of 4 samples. Details |
| PFHxS | 10 ppt | Not foundNot found in any of 4 samples |
| PFNA | 10 ppt | Not foundNot found in any of 4 samples |
| HFPO-DA (GenX) | 10 ppt | Not foundNot found in any of 4 samples |
| PFBS | Index only | Below EPA’s limits4.8 ppt highest, found in 3 of 4 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 20291
PFOS
Comes from the source
4.8ppt
Highest sample, July 31, 2025; found in 3 of 4
2025 average: 2.8 ppt
The highest sample was 4.8 ppt, above 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 2.8 ppt, for the year to Dec. 31, 2025: below Pennsylvania’s limit of 18 ppt and below EPA’s new limit of 4.0 ppt. Its only year on file is 2025, when its four samples averaged 2.8 ppt.
What handles it
- NSF/ANSI 53 look for “PFOS Reduction”
- NSF/ANSI 58 look for “Perfluorooctane Sulfonate (PFOS)”
Above the health goal2
PFOA
Comes from the source
2.8ppt
Highest sample, July 31, 2025; found in 4 of 4
2025 average: 2.7 ppt
The highest sample was 2.8 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 2.7 ppt, for the year to Dec. 31, 2025: below Pennsylvania’s limit of 14 ppt and below EPA’s new limit of 4.0 ppt. Its only year on file is 2025, when its four samples averaged 2.7 ppt.
What handles it
- NSF/ANSI 53 look for “PFOA Reduction”
- NSF/ANSI 58 look for “Perfluorooctanoic Acid (PFOA)”
Lead
Comes from pipes, often your own
1.0ppb
90th percentile, 1996
In the latest period, 9 in 10 homes sampled were at or below 1.0 ppb, below EPA’s action level of 15 ppb. The action level drops to 10 ppb on Nov. 1, 2027. 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”
Below EPA’s limits4
Nitrate
Comes from the source
7.8ppm
Highest sample; found in 28 of 28
2026 average: 3.7 ppm
The highest sample, in 2025, was 7.8 ppm, below EPA’s legal limit of 10 ppm. In 2026, the latest year on file, its four samples averaged 3.7 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 6.0 ppm, in 2015.
What handles it
- NSF/ANSI 58 look for “Nitrate/Nitrite Reduction”
- NSF/ANSI 53 look for “Nitrate/Nitrite (30 ppm challenge)”
Haloacetic acids (HAA5)
Forms or is added in treatment
31.4ppb
Highest yearly average, 2022 to 2025
2025: not found
Averaged by year, the highest was 31.4 ppb, in 2022, below EPA’s legal limit of 60 ppb. Its highest single sample was 94.1 ppb. In 2025, the latest year on file, it wasn’t found in its one sample. EPA recorded no violation for haloacetic acids (HAA5) at this utility since 2020. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 8.5 ppb, in 2012.
What handles it
No certification claim covers this compound yet.
Total trihalomethanes (TTHM)
Forms or is added in treatment
18.3ppb
Highest yearly average, 2022 to 2025
2025: not found
Averaged by year, the highest was 18.3 ppb, in 2022, below EPA’s legal limit of 80 ppb. Its highest single sample was 54.8 ppb. In 2025, the latest year on file, it wasn’t found in its one sample. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 4.6 ppb, in 2012.
What handles it
- NSF/ANSI 53 look for “Trihalomethanes (TTHM) Reduction”
- NSF/ANSI 58 look for “Trihalomethanes (TTHM) Reduction”
PFBS
Comes from the source
4.8ppt
Highest sample, July 31, 2025; found in 3 of 4
2025 average: 2.5 ppt
The highest sample was 4.8 ppt, below EPA’s hazard index benchmark of 2,000 ppt. PFBS has no legal limit or health goal of its own. Its only year on file is 2025, when its four samples averaged 2.5 ppt.
What handles it
- NSF/ANSI 53 look for “Total PFAS Reduction”
7 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)
- Fluoride
- Uranium
PFAS, from Pennsylvania’s own monitoring
- HFPO-DA (GenX)
- PFHxS
- 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: PFOS Reduction, PFOA Reduction, Lead Reduction
For: PFOS, PFOA, Lead
Other certifiers’ wording: Total PFAS Reduction; Perfluorooctane Sulfonate (PFOS); Perfluorooctanoic Acid (PFOA)
- NSF/ANSI 58
Claims: Perfluorooctane Sulfonate (PFOS), Perfluorooctanoic Acid (PFOA), Lead Reduction
For: PFOS, PFOA, Lead
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
ZeroWater 10 Cup Pitcher (ZP-010)
Pitcher
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53checked Oct. 4, 2026
Certified for: PFOS, PFOA, Lead
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, Lead
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, Lead
Under-sink reverse osmosis
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58checked Oct. 4, 2026
Certified for: PFOS, PFOA, Lead
Under-sink reverse osmosis
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58checked Oct. 9, 2026
Certified for: PFOS, PFOA, Lead
Violations since 2016
No health-based violations on file with EPA since 2016. There are 44 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), arsenic, chromium (total), fluoride and uranium results here are Pennsylvania’s own from 2020 on, with EPA’s national file for 2012 to 2019. Big Boulder MHP’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. 2, 2020 to Oct. 1, 2026; Pennsylvania’s PFAS results run from March 20, 2025 to Nov. 6, 2025.
Testing your own tap
The 3 labs Pennsylvania certifies closest to the area Big Boulder MHP serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Pure-Test Laboratory
Myerstown, PA · about 6 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics
Owl Hill Laboratories LLC
Lititz, PA · about 16 miles
Certified for bacteria
Microbac Laboratories, Inc. - Harrisburg
Harrisburg, PA · about 18 miles
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 PA7380012. 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 PFOS
- Get the utility’s own reportBig Boulder MHP 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