Petersburg Commons Water Syste
What EPA’s and Pennsylvania’s records show in this utility’s water: nitrate, arsenic and other regulated chemicals, plus violations since 2016, with the certification that handles each result.
- Serves
- 100 people
- Connections
- 44
- Water source
- Groundwater bought from another system
- Based in
- Duncannon, PA
- County
- Perry
- Owner
- Local government
The ZIP code it serves
The short answer
Nothing in EPA’s and Pennsylvania’s records for this utility is above a health goal. That covers nitrate, arsenic and other regulated chemicals, not everything. No health-based violations on file since 2016.
What was found
Total trihalomethanes (TTHM) and haloacetic acids (HAA5): Pennsylvania’s own results, samples taken from Sept. 7, 2022 to Sept. 4, 2025, with EPA’s 2012 to 2019 file for earlier years.
Below EPA’s limits2
Total trihalomethanes (TTHM)
Forms or is added in treatment
17.8ppb
Highest yearly average, 2022 to 2025
2025, one sample: 15 ppb
Averaged by year, the highest was 17.8 ppb, in 2022, below EPA’s legal limit of 80 ppb. In 2025, the latest year on file, its one sample was 15 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 13.5 ppb, in 2016.
What handles it
- NSF/ANSI 53 look for “Trihalomethanes (TTHM) Reduction”
- NSF/ANSI 58 look for “Trihalomethanes (TTHM) Reduction”
Haloacetic acids (HAA5)
Forms or is added in treatment
5.6ppb
Highest yearly average, 2022 to 2025
2025, one sample: 2.7 ppb
Averaged by year, the highest was 5.6 ppb, in 2022, below EPA’s legal limit of 60 ppb. In 2025, the latest year on file, its one sample was 2.7 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 2.9 ppb, in 2019.
What handles it
No certification claim covers this compound yet.
Violations since 2016
No health-based violations on file with EPA since 2016. There are 2 monitoring or reporting violations: a sample missed, late or not reported.
What this report can’t tell you
Everything else. Total trihalomethanes (TTHM) and haloacetic acids (HAA5) results here are Pennsylvania’s own from 2022 on, with EPA’s national file for 2012 to 2019. Petersburg Commons Water Syste’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 Sept. 7, 2022 to Sept. 4, 2025.
Testing your own tap
The 3 labs Pennsylvania certifies closest to the area Petersburg Commons Water Syste serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Microbac Laboratories, Inc. - Harrisburg
Harrisburg, PA · about 15 miles
H2O Environmental LLC
Harrisburg, PA · about 17 miles
Certified for bacteria
ALS Environmental - Middletown
Middletown, PA · about 23 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
- 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 PA7500016. Rebuilt from EPA data on Oct. 18, 2026.
What to do next
- Nothing here is above a health goalIn EPA’s and Pennsylvania’s records for this utility. They don’t cover everything, which is why the next step matters.Every contaminant TapBuff tracks
- Get the utility’s own reportPetersburg Commons Water Syste 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
- Decide if you want a filter at allA filter for taste or chlorine is a preference, not a need. The standards say what each kind can do.NSF/ANSI standards, decoded