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Community Water System · PWS PA6430056

Stoneboro Water Works

Stoneboro, Pennsylvania 16153 - drinking water served from groundwater sources to 956 people, tracked in EPA SDWIS and UCMR5.

956
People served
205
EPA violations
4
Health-based
Untested
UCMR5 result

The verdict

EPA records 205 drinking-water violations at Stoneboro Water Works, 2% of them health-based - above the Pennsylvania per-system average.

205
Total EPA violations on record
2%
Health-based (MCL / treatment failure)
956
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Stoneboro Water Works

Stoneboro Water Works is a local-owned community water system that delivers drinking water to 956 residents in Stoneboro, Pennsylvania (Mercer County) through 536 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 205 total violations for this system , of which 4 (2%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 176 monitoring and reporting violations are on file. The most recent violation on record dates to 2023.

The most frequently cited contaminant at this system is Chlorine, recorded in 28 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across Pennsylvania, EPA tracks 7,701 public water systems serving 12,630,061 people, with 1,159,868 cumulative violations and 68,517 health-based violations on record. About 97% of systems in the state carry at least one violation, and state-wide the average per system is 150.6 violations. Statewide, 224 of 389 UCMR5-tested systems have reported PFAS detections (57.6%).

Stoneboro Water Works's 205 violations sit above the Pennsylvania average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
956
Total Violations
205
Health-Based Violations
4
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
536
County
Mercer
School/Daycare
No
MCL Violations
4
Monitoring Violations
176
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Chlorine MR 28 2023
Lead and Copper Rule MR 13 2022
Consumer Confidence Rule Other 8 2023
Public Notice Other 8 2023
Nitrate MR 8 1994
p-Dichlorobenzene MR 6 1992
Vinyl chloride MR 6 1992
1,1-Dichloroethylene MR 6 1992
1,2-Dichloroethane MR 6 1992
1,1,1-Trichloroethane MR 6 1992
Carbon tetrachloride MR 6 1992
Trichloroethylene MR 6 1992
Benzene MR 5 1992
Coliform (TCR) MCL 4 2009
Nitrite MR 4 2013
2,3,7,8-TCDD MR 4 2014
Total Polychlorinated Biphenyls (PCB) MR 4 2014
Groundwater Rule MR 4 2023
Arsenic MR 4 1994
Chromium MR 4 1994
Cadmium MR 4 1994
Selenium MR 4 1994
Fluoride MR 4 1994
Mercury MR 4 1994
Barium MR 4 1994
CYANIDE MR 3 1994
Nickel MR 3 1994
Thallium, Total MR 3 1994
Antimony, Total MR 3 1994
Coliform (TCR) MR 3 2007

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Stoneboro Water Works.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID PA6430056 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Pennsylvania Drinking Water Authority

Pennsylvania DEP, Bureau of Safe Drinking Water is the primacy agency that licenses and inspects Stoneboro Water Works under EPA-delegated authority.

Open PA regulator portal

Source: Pennsylvania DEP, Bureau of Safe Drinking Water

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2023 Chlorine MR 28 SDWIS / PA6430056 / 0999
2023 Consumer Confidence Rule Other 8 SDWIS / PA6430056 / 7000
2023 Public Notice Other 8 SDWIS / PA6430056 / 7500
2023 Groundwater Rule MR 4 SDWIS / PA6430056 / 0700
2022 Lead and Copper Rule MR 13 SDWIS / PA6430056 / 5000
2016 Revised Total Coliform Rule RPT 2 SDWIS / PA6430056 / 8000
2014 2,3,7,8-TCDD MR 4 SDWIS / PA6430056 / 2063
2014 Total Polychlorinated Biphenyls (PCB) MR 4 SDWIS / PA6430056 / 2383
2013 Nitrite MR 4 SDWIS / PA6430056 / 1041
2011 Endothall MR 2 SDWIS / PA6430056 / 2033
2011 Di(2-ethylhexyl) phthalate MR 2 SDWIS / PA6430056 / 2039
2011 Simazine MR 2 SDWIS / PA6430056 / 2037
2011 Benzo(a)pyrene MR 2 SDWIS / PA6430056 / 2306
2011 Atrazine MR 2 SDWIS / PA6430056 / 2050
2011 Di(2-ethylhexyl) adipate MR 2 SDWIS / PA6430056 / 2035

How Stoneboro Water Works Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Stoneboro Water Works Pennsylvania avg Federal benchmark
Total violations 205 150.6 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 4 8.9 Indicates a contaminant exceeded a federal MCL
PFAS detection None 57.6% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 956 1,640 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 7,701 regulated public water systems in Pennsylvania.

Federal MCL reference, Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Stoneboro Water Works water safe to drink? ▼
Stoneboro Water Works (PWS ID: PA6430056) has 205 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 956 people using Groundwater sources.
How many people does Stoneboro Water Works serve? ▼
Stoneboro Water Works serves 956 people in Stoneboro, Pennsylvania. It is a Local-owned system using Groundwater water sources with 536 service connections.
What type of violations does Stoneboro Water Works have? ▼
Stoneboro Water Works has 205 total violations: 4 health-based violations (MCL exceedances or treatment failures), 176 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Stoneboro Water Works water? ▼
No PFAS testing data is available for Stoneboro Water Works under the EPA's UCMR5 monitoring program.
What water source does Stoneboro Water Works use? ▼
Stoneboro Water Works uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.