Community Water System · PWS PA4140079

Unionville Municipal Waterwks

Fleming, Pennsylvania 16835 - drinking water served from groundwater sources to 290 people, tracked in EPA SDWIS and UCMR5.

Compiled by PlainWater Editorial, Drinking Water Quality Editorial Team · May 15, 2026

290
People served: 141
EPA violations: 0
Health-based: Untested
UCMR5 result

The verdict

EPA records 141 drinking-water violations at Unionville Municipal Waterwks - below the Pennsylvania per-system average.

141
Total EPA violations on record: 0%
Health-based (MCL / treatment failure): 290
People served by this system: N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Unionville Municipal Waterwks

Unionville Municipal Waterwks is a local-owned community water system that delivers drinking water to 290 residents in Fleming, Pennsylvania (Centre County) through 142 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 141 total violations for this system , of which 0 (0%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 133 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Groundwater Rule, recorded in 8 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%).

Unionville Municipal Waterwks's 141 violations sit below 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

290

Total Violations

141

Health-Based Violations

Water Source

Groundwater

System Details

System Type: Community
Owner Type: Local
Connections: 142
County: Centre
School/Daycare: No
MCL Violations: 0
Monitoring Violations: 133
Treatment Tech Violations: 0

Violation History

Contaminant violations recorded by EPA.

Contaminant	Category	Count	Latest
Groundwater Rule	MR	8	2025
Arsenic	MR	6	2009
Consumer Confidence Rule	Other	5	2023
1,2,4-Trichlorobenzene	MR	5	1995
Xylenes, Total	MR	5	1995
DICHLOROMETHANE	MR	5	1995
o-Dichlorobenzene	MR	5	1995
p-Dichlorobenzene	MR	5	1995
1,1-Dichloroethylene	MR	5	1995
1,1,1-Trichloroethane	MR	5	1995
Carbon tetrachloride	MR	5	1995
Trichloroethylene	MR	5	1995
1,1,2-Trichloroethane	MR	5	1995
Tetrachloroethylene	MR	5	1995
CHLOROBENZENE	MR	5	1995
Benzene	MR	5	1995
cis-1,2-Dichloroethylene	MR	5	1995
trans-1,2-Dichloroethylene	MR	5	1995
1,2-Dichloropropane	MR	5	1995
Ethylbenzene	MR	5	1995
1,2-Dichloroethane	MR	5	1995
Styrene	MR	3	1994
Toluene	MR	3	1994
Coliform (TCR)	MR	2	2005
Chlorine	MR	2	2005
Radium-226	MR	2	2022
Radium-228	MR	2	2022
Public Notice	Other	2	2011
Combined Uranium	MR	2	2022
Endrin	MR	1	1982

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 Unionville Municipal Waterwks.

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 PA4140079 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 Unionville Municipal Waterwks 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
2025	Groundwater Rule	MR	8	SDWIS / PA4140079 / 0700
2023	Consumer Confidence Rule	Other	5	SDWIS / PA4140079 / 7000
2022	Radium-226	MR	2	SDWIS / PA4140079 / 4020
2022	Radium-228	MR	2	SDWIS / PA4140079 / 4030
2022	Combined Uranium	MR	2	SDWIS / PA4140079 / 4006
2011	Public Notice	Other	2	SDWIS / PA4140079 / 7500
2009	Arsenic	MR	6	SDWIS / PA4140079 / 1005
2005	Coliform (TCR)	MR	2	SDWIS / PA4140079 / 3100
2005	Chlorine	MR	2	SDWIS / PA4140079 / 0999
1995	1,2,4-Trichlorobenzene	MR	5	SDWIS / PA4140079 / 2378
1995	Xylenes, Total	MR	5	SDWIS / PA4140079 / 2955
1995	DICHLOROMETHANE	MR	5	SDWIS / PA4140079 / 2964
1995	o-Dichlorobenzene	MR	5	SDWIS / PA4140079 / 2968
1995	p-Dichlorobenzene	MR	5	SDWIS / PA4140079 / 2969
1995	1,1-Dichloroethylene	MR	5	SDWIS / PA4140079 / 2977

How Unionville Municipal Waterwks Compares

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

Metric	Unionville Municipal Waterwks	Pennsylvania avg	Federal benchmark
Total violations	141	150.6	SDWA compliance, any non-zero count is a recorded breach
Health-based violations	0	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	290	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 Unionville Municipal Waterwks water safe to drink? ▼

Unionville Municipal Waterwks (PWS ID: PA4140079) has 141 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 290 people using Groundwater sources.

How many people does Unionville Municipal Waterwks serve? ▼

Unionville Municipal Waterwks serves 290 people in Fleming, Pennsylvania. It is a Local-owned system using Groundwater water sources with 142 service connections.

What type of violations does Unionville Municipal Waterwks have? ▼

Unionville Municipal Waterwks has 141 total violations: 0 health-based violations (MCL exceedances or treatment failures), 133 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Has PFAS been detected in Unionville Municipal Waterwks water? ▼

No PFAS testing data is available for Unionville Municipal Waterwks under the EPA's UCMR5 monitoring program.

What water source does Unionville Municipal Waterwks use? ▼

Unionville Municipal Waterwks 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.