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Stewartstown, PA Tap Water Quality 2026

Water quality report for Stewartstown, PA — PFAS, lead and copper results, violation history and state inspection findings from EPA SDWIS.

A look at Stewartstown's drinking water using EPA enforcement records: violations, lead and copper results, PFAS sampling and state inspection findings.

Main Utility: Stewartstown Boro Water Auth PWSID: PA7670062 Updated: 2026 Q2
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PFAS above the federal limit at 1 of 5 sampling points

Lead was not detected and no violations are open. However, PFAS exceeds the federal limit at 1 of 5 sampling points, running as high as 1.14 times the limit.

C

Stewartstown earns a C for water quality

Graded on violations, lead, and PFAS, with state inspection findings.

Lead: not detected
PFAS above the federal limit at 1 of 5 sampling points
110 violations since 2015, 0 health-based
No violations currently open
Stewartstown's lead level vs. all Pennsylvania community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: Not detected — 0% of the federal action level
✓ Lower lead than % of Pennsylvania utilities
Population Served
2127
~1880 connections
Water Source
Surface water
Purchased from another system — SDWIS source code SWP
Active Violations
0
110 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
0% of EPA action level
Not detected
Action level: 15 ppb
Copper (Cu)
90th percentile of tap samples. SDWIS reports a copper figure only when a system exceeds the action level, so any value here is an exceedance.
161.5% of EPA action level
2,100 ppb
Action level: 1,300 ppb
Lead was not detected at the 90th percentile — the result fell below the laboratory detection limit. That is not the same as an absence of lead in every tap, and older homes with lead service lines can still show higher readings. Copper reached the action level here; a copper figure appears in SDWIS only when a system triggers it.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
Nitrate MONITORING AND REPORTING — 10 mg/L 2022 Resolved
Nitrite MONITORING AND REPORTING — 1 mg/L 2022 Resolved
Nitrate MONITORING AND REPORTING — 10 mg/L 2022 Resolved
Nitrite MONITORING AND REPORTING — 1 mg/L 2022 Resolved
Nitrate MONITORING AND REPORTING — 10 mg/L 2022 Resolved
Nitrite MONITORING AND REPORTING — 1 mg/L 2022 Resolved
Nitrate MONITORING AND REPORTING — 10 mg/L 2022 Resolved
Nitrite MONITORING AND REPORTING — 1 mg/L 2022 Resolved
Radium-226 MONITORING AND REPORTING — — 2021 Resolved
Radium-228 MONITORING AND REPORTING — — 2021 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2021 Resolved
Nitrite MONITORING AND REPORTING — 1 mg/L 2021 Resolved
Nitrite MONITORING AND REPORTING — 1 mg/L 2021 Resolved
Nitrite MONITORING AND REPORTING — 1 mg/L 2021 Resolved
Nitrite MONITORING AND REPORTING — 1 mg/L 2021 Resolved
Groundwater Rule MONITORING AND REPORTING — — 2021 Resolved
1,2,4-Trichlorobenzene MONITORING AND REPORTING — 0.07 mg/L 2021 Resolved
cis-1,2-Dichloroethylene MONITORING AND REPORTING — 0.07 mg/L 2021 Resolved
Xylenes, Total MONITORING AND REPORTING — 10 mg/L 2021 Resolved
DICHLOROMETHANE MONITORING AND REPORTING — 0.005 mg/L 2021 Resolved
o-Dichlorobenzene MONITORING AND REPORTING — 0.6 mg/L 2021 Resolved
p-Dichlorobenzene MONITORING AND REPORTING — 0.075 mg/L 2021 Resolved
1,1-Dichloroethylene MONITORING AND REPORTING — 0.007 mg/L 2021 Resolved
trans-1,2-Dichloroethylene MONITORING AND REPORTING — 0.1 mg/L 2021 Resolved
1,2-Dichloroethane MONITORING AND REPORTING — 0.005 mg/L 2021 Resolved
1,1,1-Trichloroethane MONITORING AND REPORTING — 0.2 mg/L 2021 Resolved
Carbon tetrachloride MONITORING AND REPORTING — 0.005 mg/L 2021 Resolved
1,2-Dichloropropane MONITORING AND REPORTING — 0.005 mg/L 2021 Resolved
Trichloroethylene MONITORING AND REPORTING — 0.005 mg/L 2021 Resolved
1,1,2-Trichloroethane MONITORING AND REPORTING — 0.005 mg/L 2021 Resolved
Tetrachloroethylene MONITORING AND REPORTING — 0.005 mg/L 2021 Resolved
CHLOROBENZENE MONITORING AND REPORTING — 0.1 mg/L 2021 Resolved
Benzene MONITORING AND REPORTING — 0.005 mg/L 2021 Resolved
Toluene MONITORING AND REPORTING — 1 mg/L 2021 Resolved
Ethylbenzene MONITORING AND REPORTING — 0.7 mg/L 2021 Resolved
Styrene MONITORING AND REPORTING — 0.1 mg/L 2021 Resolved
Nitrate MONITORING AND REPORTING — 10 mg/L 2020 Resolved
Nitrite MONITORING AND REPORTING — 1 mg/L 2020 Resolved
2,3,7,8-TCDD MONITORING AND REPORTING — 0.00000003 mg/L 2020 Resolved
2,3,7,8-TCDD MONITORING AND REPORTING — 0.00000003 mg/L 2020 Resolved
2,3,7,8-TCDD MONITORING AND REPORTING — 0.00000003 mg/L 2020 Resolved
2,3,7,8-TCDD MONITORING AND REPORTING — 0.00000003 mg/L 2020 Resolved
Arsenic MONITORING AND REPORTING — 0.010 mg/L 2020–2022 Resolved
Barium MONITORING AND REPORTING — 2 mg/L 2020–2022 Resolved
Cadmium MONITORING AND REPORTING — 0.005 mg/L 2020–2022 Resolved
Chromium MONITORING AND REPORTING — 0.1 mg/L 2020–2022 Resolved
CYANIDE MONITORING AND REPORTING — 0.2 mg/L 2020–2022 Resolved
Fluoride MONITORING AND REPORTING — 4.0 mg/L 2020–2022 Resolved
Mercury MONITORING AND REPORTING — 0.002 mg/L 2020–2022 Resolved
Nickel MONITORING AND REPORTING — — 2020–2022 Resolved
Selenium MONITORING AND REPORTING — 0.05 mg/L 2020–2022 Resolved
Antimony, Total MONITORING AND REPORTING — 0.006 mg/L 2020–2022 Resolved
Beryllium, Total MONITORING AND REPORTING — 0.004 mg/L 2020–2022 Resolved
Thallium, Total MONITORING AND REPORTING — 0.002 mg/L 2020–2022 Resolved
Arsenic MONITORING AND REPORTING — 0.010 mg/L 2020–2022 Resolved
Barium MONITORING AND REPORTING — 2 mg/L 2020–2022 Resolved
Cadmium MONITORING AND REPORTING — 0.005 mg/L 2020–2022 Resolved
Chromium MONITORING AND REPORTING — 0.1 mg/L 2020–2022 Resolved
CYANIDE MONITORING AND REPORTING — 0.2 mg/L 2020–2022 Resolved
Fluoride MONITORING AND REPORTING — 4.0 mg/L 2020–2022 Resolved
Mercury MONITORING AND REPORTING — 0.002 mg/L 2020–2022 Resolved
Nickel MONITORING AND REPORTING — — 2020–2022 Resolved
Selenium MONITORING AND REPORTING — 0.05 mg/L 2020–2022 Resolved
Antimony, Total MONITORING AND REPORTING — 0.006 mg/L 2020–2022 Resolved
Beryllium, Total MONITORING AND REPORTING — 0.004 mg/L 2020–2022 Resolved
Thallium, Total MONITORING AND REPORTING — 0.002 mg/L 2020–2022 Resolved
Arsenic MONITORING AND REPORTING — 0.010 mg/L 2020–2022 Resolved
Barium MONITORING AND REPORTING — 2 mg/L 2020–2022 Resolved
Cadmium MONITORING AND REPORTING — 0.005 mg/L 2020–2022 Resolved
Chromium MONITORING AND REPORTING — 0.1 mg/L 2020–2022 Resolved
CYANIDE MONITORING AND REPORTING — 0.2 mg/L 2020–2022 Resolved
Fluoride MONITORING AND REPORTING — 4.0 mg/L 2020–2022 Resolved
Mercury MONITORING AND REPORTING — 0.002 mg/L 2020–2022 Resolved
Nickel MONITORING AND REPORTING — — 2020–2022 Resolved
Selenium MONITORING AND REPORTING — 0.05 mg/L 2020–2022 Resolved
Antimony, Total MONITORING AND REPORTING — 0.006 mg/L 2020–2022 Resolved
Beryllium, Total MONITORING AND REPORTING — 0.004 mg/L 2020–2022 Resolved
Thallium, Total MONITORING AND REPORTING — 0.002 mg/L 2020–2022 Resolved
Arsenic MONITORING AND REPORTING — 0.010 mg/L 2020–2022 Resolved
Barium MONITORING AND REPORTING — 2 mg/L 2020–2022 Resolved
Cadmium MONITORING AND REPORTING — 0.005 mg/L 2020–2022 Resolved
Chromium MONITORING AND REPORTING — 0.1 mg/L 2020–2022 Resolved
CYANIDE MONITORING AND REPORTING — 0.2 mg/L 2020–2022 Resolved
Fluoride MONITORING AND REPORTING — 4.0 mg/L 2020–2022 Resolved
Mercury MONITORING AND REPORTING — 0.002 mg/L 2020–2022 Resolved
Nickel MONITORING AND REPORTING — — 2020–2022 Resolved
Selenium MONITORING AND REPORTING — 0.05 mg/L 2020–2022 Resolved
Antimony, Total MONITORING AND REPORTING — 0.006 mg/L 2020–2022 Resolved
Beryllium, Total MONITORING AND REPORTING — 0.004 mg/L 2020–2022 Resolved
Thallium, Total MONITORING AND REPORTING — 0.002 mg/L 2020–2022 Resolved
Groundwater Rule MONITORING AND REPORTING — — 2019 Resolved
Nitrate MONITORING AND REPORTING — 10 mg/L 2019 Resolved
Nitrite MONITORING AND REPORTING — 1 mg/L 2019 Resolved
Nitrate MONITORING AND REPORTING — 10 mg/L 2019 Resolved
Nitrite MONITORING AND REPORTING — 1 mg/L 2019 Resolved
Nitrate MONITORING AND REPORTING — 10 mg/L 2019 Resolved
Nitrite MONITORING AND REPORTING — 1 mg/L 2019 Resolved
Nitrate MONITORING AND REPORTING — 10 mg/L 2019 Resolved
Nitrite MONITORING AND REPORTING — 1 mg/L 2019 Resolved
Groundwater Rule MONITORING AND REPORTING — — 2018 Resolved
Groundwater Rule MONITORING AND REPORTING — — 2017 Resolved
Groundwater Rule MONITORING AND REPORTING — — 2017 Resolved
Groundwater Rule MONITORING AND REPORTING — — 2017 Resolved
Surface Water Treatment Rule MONITORING AND REPORTING — — 2017 Resolved
Groundwater Rule MONITORING AND REPORTING — — 2017 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2017 Resolved
Nitrate MONITORING AND REPORTING — 10 mg/L 2016 Resolved
Nitrite MONITORING AND REPORTING — 1 mg/L 2016 Resolved
Groundwater Rule MONITORING AND REPORTING — — 2015 Resolved
TTHM MONITORING AND REPORTING — 0.080 mg/L 2015 Resolved
Understanding violation types MCL violations mean a contaminant exceeded the federal maximum limit — the most serious type.
TT (Treatment Technique) violations mean required treatment procedures weren't followed, but don't necessarily mean contamination occurred.

Violation History

110 violations are on record since 2015, of which 0 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Stewartstown Boro Water Auth
PWSID PA7670062
Water source Surface water — Purchased from another system — SDWIS source code SWP
Population served 2,127
Service connections 1,880
Systems serving this area 1
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Stewartstown tap water safe to drink? ▼
It meets most federal standards, but PFAS exceeds the federal limit at 1 of 5 sampling points. No violations are currently open.
Does Stewartstown water have PFAS? ▼
Yes. PFAS exceeds the federal limit at 1 of 5 sampling points, running as high as 1.14 times the limit. Limits are enforced on a running annual average at each sampling point, not on a single sample.
Who supplies water to Stewartstown? ▼
Stewartstown Boro Water Auth (PWSID PA7670062). Surface water. Purchased from another system — SDWIS source code SWP
When was this system last inspected? ▼
It was last inspected on 2025-08-01. No significant deficiencies were recorded.

What Should Stewartstown Residents Do?

1
Consider a reverse-osmosis filter
Reverse osmosis removes more than 95% of PFAS. Standard carbon pitchers do not.
2
Check for a lead service line
Lead reaches tap water mainly through service lines and household plumbing. Suppliers now publish an inventory identifying lead lines.
3
Flush before drinking
If water has sat in pipes more than six hours, run the cold tap for two minutes before drinking or cooking.

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