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Transient Non-Community Water System · PWS WI2670189

St Lawrence Church

Hartford, Wisconsin 53027-9436 - drinking water served from groundwater sources to 254 people, tracked in EPA SDWIS and UCMR5.

254
People served
217
EPA violations
9
Health-based
Untested
UCMR5 result

The verdict

EPA records 217 drinking-water violations at St Lawrence Church, 4% of them health-based - above the Wisconsin per-system average.

217
Total EPA violations on record
4%
Health-based (MCL / treatment failure)
254
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: St Lawrence Church

St Lawrence Church is a private-owned transient non-community water system that delivers drinking water to 254 residents in Hartford, Wisconsin (Washington County) through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 217 total violations for this system , of which 9 (4%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 207 monitoring and reporting violations are on file. The most recent violation on record dates to 2002.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 21 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 Lawrence Church's 217 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
254
Total Violations
217
Health-Based Violations
9
Water Source
Groundwater

System Details

System Type
Transient Non-Community
Owner Type
Private
Connections
1
County
Washington
School/Daycare
No
MCL Violations
9
Monitoring Violations
207
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 21 2002
Coliform (TCR) MCL 9 1996
Nitrate MR 6 2002
Lead and Copper Rule MR 6 2001
Nickel MR 3 2001
Fluoride MR 3 2001
Chromium MR 3 2001
Thallium, Total MR 3 2001
Antimony, Total MR 3 2001
Nitrate-Nitrite MR 3 2001
Dinoseb MR 3 2001
Carbofuran MR 3 2001
Heptachlor MR 3 2001
Toxaphene MR 3 2001
Methoxychlor MR 3 2001
Endrin MR 3 2001
2,4-D MR 3 2001
2,4,5-TP MR 3 2001
Pentachlorophenol MR 3 2001
Total Polychlorinated Biphenyls (PCB) MR 3 2001
Chlordane MR 3 2001
OXAMYL MR 3 2001
Benzene MR 3 2001
Trichloroethylene MR 3 2001
1,2-Dichloropropane MR 3 2001
Styrene MR 3 2001
Ethylbenzene MR 3 2001
Vinyl chloride MR 3 2001
Xylenes, Total MR 3 2001
o-Dichlorobenzene MR 3 2001

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 Lawrence Church.

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 WI2670189 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 Lawrence Church 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
2002 Coliform (TCR) MR 21 SDWIS / WI2670189 / 3100
2002 Nitrate MR 6 SDWIS / WI2670189 / 1040
2001 Lead and Copper Rule MR 6 SDWIS / WI2670189 / 5000
2001 Nickel MR 3 SDWIS / WI2670189 / 1036
2001 Fluoride MR 3 SDWIS / WI2670189 / 1025
2001 Chromium MR 3 SDWIS / WI2670189 / 1020
2001 Thallium, Total MR 3 SDWIS / WI2670189 / 1085
2001 Antimony, Total MR 3 SDWIS / WI2670189 / 1074
2001 Nitrate-Nitrite MR 3 SDWIS / WI2670189 / 1038
2001 Dinoseb MR 3 SDWIS / WI2670189 / 2041
2001 Carbofuran MR 3 SDWIS / WI2670189 / 2046
2001 Heptachlor MR 3 SDWIS / WI2670189 / 2065
2001 Toxaphene MR 3 SDWIS / WI2670189 / 2020
2001 Methoxychlor MR 3 SDWIS / WI2670189 / 2015
2001 Endrin MR 3 SDWIS / WI2670189 / 2005

How St Lawrence Church Compares

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

Metric St Lawrence Church Wisconsin avg Federal benchmark
Total violations 217 26 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 9 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 254 467 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 Lawrence Church water safe to drink? ▼
St Lawrence Church (PWS ID: WI2670189) has 217 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 254 people using Groundwater sources.
How many people does St Lawrence Church serve? ▼
St Lawrence Church serves 254 people in Hartford, Wisconsin. It is a Private-owned system using Groundwater water sources with 1 service connections.
What type of violations does St Lawrence Church have? ▼
St Lawrence Church has 217 total violations: 9 health-based violations (MCL exceedances or treatment failures), 207 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in St Lawrence Church water? ▼
No PFAS testing data is available for St Lawrence Church under the EPA's UCMR5 monitoring program.
What water source does St Lawrence Church use? ▼
St Lawrence Church uses Groundwater as its primary water source. It is classified as a Transient Non-Community Water System, serving transient populations.
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.