Non-Transient Non-Community Water System · PWS PA3061021

Twin Valley Middle School

Elverson, Pennsylvania 19520 - drinking water served from groundwater sources to 1,140 people, tracked in EPA SDWIS and UCMR5.

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

1,140
People served: 164
EPA violations: 4
Health-based: Untested
UCMR5 result

The verdict

EPA records 164 drinking-water violations at Twin Valley Middle School, 2% of them health-based - above the Pennsylvania per-system average.

164
Total EPA violations on record: 2%
Health-based (MCL / treatment failure): 1,140
People served by this system: N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Twin Valley Middle School

Twin Valley Middle School is a public/private-owned non-transient non-community water system that delivers drinking water to 1,140 residents in Elverson, Pennsylvania (Berks County) through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 164 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 158 monitoring and reporting violations are on file. The most recent violation on record dates to 2019.

The most frequently cited contaminant at this system is Chlorine, recorded in 38 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%).

Twin Valley Middle School's 164 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

1,140

Total Violations

164

Health-Based Violations

Water Source

Groundwater

System Details

System Type: Non-Transient Non-Community
Owner Type: Public/Private
Connections: 1
County: Berks
School/Daycare: Yes
MCL Violations: 4
Monitoring Violations: 158
Treatment Tech Violations: 0

Violation History

Contaminant violations recorded by EPA.

Contaminant	Category	Count	Latest
Chlorine	MR	38	2018
Coliform (TCR)	MR	14	2013
cis-1,2-Dichloroethylene	MR	5	1993
1,2-Dichloroethane	MR	5	1993
1,1,1-Trichloroethane	MR	5	1993
Tetrachloroethylene	MR	5	1993
CHLOROBENZENE	MR	5	1993
Benzene	MR	5	1993
Ethylbenzene	MR	5	1993
Styrene	MR	5	1993
p-Dichlorobenzene	MR	5	1993
Carbon tetrachloride	MR	5	1993
Toluene	MR	5	1993
1,2,4-Trichlorobenzene	MR	5	1993
trans-1,2-Dichloroethylene	MR	5	1993
o-Dichlorobenzene	MR	5	1993
Trichloroethylene	MR	5	1993
1,1,2-Trichloroethane	MR	5	1993
1,1-Dichloroethylene	MR	5	1993
1,2-Dichloropropane	MR	5	1993
Xylenes, Total	MR	5	1993
DICHLOROMETHANE	MR	5	1993
Coliform (TCR)	MCL	4	2012
Nitrate	MR	3	2004
TTHM	MR	3	2019
Revised Total Coliform Rule	RPT	2	2017

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 Twin Valley Middle School.

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 PA3061021 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 Twin Valley Middle School 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
2019	TTHM	MR	3	SDWIS / PA3061021 / 2950
2018	Chlorine	MR	38	SDWIS / PA3061021 / 0999
2017	Revised Total Coliform Rule	RPT	2	SDWIS / PA3061021 / 8000
2013	Coliform (TCR)	MR	14	SDWIS / PA3061021 / 3100
2012	Coliform (TCR)	MCL	4	SDWIS / PA3061021 / 3100
2004	Nitrate	MR	3	SDWIS / PA3061021 / 1040
1993	cis-1,2-Dichloroethylene	MR	5	SDWIS / PA3061021 / 2380
1993	1,2-Dichloroethane	MR	5	SDWIS / PA3061021 / 2980
1993	1,1,1-Trichloroethane	MR	5	SDWIS / PA3061021 / 2981
1993	Tetrachloroethylene	MR	5	SDWIS / PA3061021 / 2987
1993	CHLOROBENZENE	MR	5	SDWIS / PA3061021 / 2989
1993	Benzene	MR	5	SDWIS / PA3061021 / 2990
1993	Ethylbenzene	MR	5	SDWIS / PA3061021 / 2992
1993	Styrene	MR	5	SDWIS / PA3061021 / 2996
1993	p-Dichlorobenzene	MR	5	SDWIS / PA3061021 / 2969

How Twin Valley Middle School Compares

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

Metric	Twin Valley Middle School	Pennsylvania avg	Federal benchmark
Total violations	164	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	1,140	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 Twin Valley Middle School water safe to drink? ▼

Twin Valley Middle School (PWS ID: PA3061021) has 164 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 1,140 people using Groundwater sources.

How many people does Twin Valley Middle School serve? ▼

Twin Valley Middle School serves 1,140 people in Elverson, Pennsylvania. It is a Public/Private-owned system using Groundwater water sources with 1 service connections.

What type of violations does Twin Valley Middle School have? ▼

Twin Valley Middle School has 164 total violations: 4 health-based violations (MCL exceedances or treatment failures), 158 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Has PFAS been detected in Twin Valley Middle School water? ▼

No PFAS testing data is available for Twin Valley Middle School under the EPA's UCMR5 monitoring program.

What water source does Twin Valley Middle School use? ▼

Twin Valley Middle School uses Groundwater as its primary water source. It is classified as a Non-Transient Non-Community Water System, serving the same people for at least 6 months per year.

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.