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Non-Transient Non-Community Water System · PWS WI2680729

St Joseph Church & School

Big Bend, Wisconsin 53103 - drinking water served from groundwater sources to 300 people, tracked in EPA SDWIS and UCMR5.

300
People served
302
EPA violations
6
Health-based
Untested
UCMR5 result

The verdict

EPA records 302 drinking-water violations at St Joseph Church & School, 2% of them health-based - above the Wisconsin per-system average.

302
Total EPA violations on record
2%
Health-based (MCL / treatment failure)
300
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: St Joseph Church & School

St Joseph Church & School is a private-owned non-transient non-community water system that delivers drinking water to 300 residents in Big Bend, Wisconsin (Waukesha County) through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 302 total violations for this system , of which 6 (2%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 296 monitoring and reporting violations are on file. The most recent violation on record dates to 2014.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 12 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 Wisconsin, EPA tracks 10,988 public water systems serving 5,131,439 people, with 285,161 cumulative violations and 58,688 health-based violations on record. About 72% of systems in the state carry at least one violation, and state-wide the average per system is 26 violations. Statewide, 51 of 202 UCMR5-tested systems have reported PFAS detections (25.2%).

St Joseph Church & School's 302 violations sit above the Wisconsin 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
300
Total Violations
302
Health-Based Violations
6
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Private
Connections
1
County
Waukesha
School/Daycare
Yes
MCL Violations
6
Monitoring Violations
296
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 12 2003
Lead and Copper Rule MR 11 2014
1,2,4-Trichlorobenzene MR 9 2002
1,1-Dichloroethylene MR 9 2002
1,2-Dichloroethane MR 9 2002
1,1,1-Trichloroethane MR 9 2002
Trichloroethylene MR 9 2002
1,1,2-Trichloroethane MR 9 2002
Tetrachloroethylene MR 9 2002
o-Dichlorobenzene MR 9 2002
trans-1,2-Dichloroethylene MR 9 2002
1,2-Dichloropropane MR 9 2002
cis-1,2-Dichloroethylene MR 9 2002
Xylenes, Total MR 9 2002
p-Dichlorobenzene MR 9 2002
Vinyl chloride MR 9 2002
Carbon tetrachloride MR 9 2002
Ethylbenzene MR 9 2002
DICHLOROMETHANE MR 9 2002
CHLOROBENZENE MR 9 2002
Toluene MR 9 2002
Styrene MR 9 2002
Benzene MR 9 2002
Nitrate MR 8 2003
Coliform (TCR) MCL 6 1997
Benzo(a)pyrene MR 4 1998
1,2-DIBROMO-3-CHLOROPROPANE MR 4 1998
ETHYLENE DIBROMIDE MR 4 1998
Di(2-ethylhexyl) phthalate MR 4 1998
Chromium MR 4 1998

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 St Joseph Church & 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 WI2680729 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Wisconsin Drinking Water Authority

Wisconsin DNR, Drinking Water and Groundwater is the primacy agency that licenses and inspects St Joseph Church & School under EPA-delegated authority.

Open WI regulator portal

Source: Wisconsin DNR, Drinking Water and Groundwater

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
2014 Lead and Copper Rule MR 11 SDWIS / WI2680729 / 5000
2003 Coliform (TCR) MR 12 SDWIS / WI2680729 / 3100
2003 Nitrate MR 8 SDWIS / WI2680729 / 1040
2002 1,2,4-Trichlorobenzene MR 9 SDWIS / WI2680729 / 2378
2002 1,1-Dichloroethylene MR 9 SDWIS / WI2680729 / 2977
2002 1,2-Dichloroethane MR 9 SDWIS / WI2680729 / 2980
2002 1,1,1-Trichloroethane MR 9 SDWIS / WI2680729 / 2981
2002 Trichloroethylene MR 9 SDWIS / WI2680729 / 2984
2002 1,1,2-Trichloroethane MR 9 SDWIS / WI2680729 / 2985
2002 Tetrachloroethylene MR 9 SDWIS / WI2680729 / 2987
2002 o-Dichlorobenzene MR 9 SDWIS / WI2680729 / 2968
2002 trans-1,2-Dichloroethylene MR 9 SDWIS / WI2680729 / 2979
2002 1,2-Dichloropropane MR 9 SDWIS / WI2680729 / 2983
2002 cis-1,2-Dichloroethylene MR 9 SDWIS / WI2680729 / 2380
2002 Xylenes, Total MR 9 SDWIS / WI2680729 / 2955

How St Joseph Church & School Compares

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

Metric St Joseph Church & School Wisconsin avg Federal benchmark
Total violations 302 26 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 6 5.3 Indicates a contaminant exceeded a federal MCL
PFAS detection None 25.2% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 300 467 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 10,988 regulated public water systems in Wisconsin.

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 St Joseph Church & School water safe to drink? ▼
St Joseph Church & School (PWS ID: WI2680729) has 302 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 300 people using Groundwater sources.
How many people does St Joseph Church & School serve? ▼
St Joseph Church & School serves 300 people in Big Bend, Wisconsin. It is a Private-owned system using Groundwater water sources with 1 service connections.
What type of violations does St Joseph Church & School have? ▼
St Joseph Church & School has 302 total violations: 6 health-based violations (MCL exceedances or treatment failures), 296 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in St Joseph Church & School water? ▼
No PFAS testing data is available for St Joseph Church & School under the EPA's UCMR5 monitoring program.
What water source does St Joseph Church & School use? ▼
St Joseph Church & 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.