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Community Water System · PWS WI1330071

Blanchardville Waterworks

Blanchardville, Wisconsin 53516-9802 - drinking water served from groundwater sources to 810 people, tracked in EPA SDWIS and UCMR5.

810
People served
82
EPA violations
0
Health-based
Untested
UCMR5 result

The verdict

EPA records 82 drinking-water violations at Blanchardville Waterworks - above the Wisconsin per-system average.

82
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
810
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Blanchardville Waterworks

Blanchardville Waterworks is a local-owned community water system that delivers drinking water to 810 residents in Blanchardville, Wisconsin (Lafayette County) through 300 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 82 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 79 monitoring and reporting violations are on file. The most recent violation on record dates to 2012.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 24 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, 78 of 202 UCMR5-tested systems have reported PFAS detections (38.6%).

Blanchardville Waterworks's 82 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
810
Total Violations
82
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
300
County
Lafayette
School/Daycare
No
MCL Violations
0
Monitoring Violations
79
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 24 2008
Chlorine MR 7 2008
CYANIDE MR 4 2002
cis-1,2-Dichloroethylene MR 2 1999
Xylenes, Total MR 2 1999
o-Dichlorobenzene MR 2 1999
p-Dichlorobenzene MR 2 1999
1,1-Dichloroethylene MR 2 1999
1,2-Dichloroethane MR 2 1999
Carbon tetrachloride MR 2 1999
Trichloroethylene MR 2 1999
1,1,2-Trichloroethane MR 2 1999
CHLOROBENZENE MR 2 1999
Toluene MR 2 1999
Lead and Copper Rule MR 2 2012
DICHLOROMETHANE MR 2 1999
1,2,4-Trichlorobenzene MR 2 1999
Vinyl chloride MR 2 1999
Styrene MR 2 1999
trans-1,2-Dichloroethylene MR 2 1999
1,1,1-Trichloroethane MR 2 1999
Ethylbenzene MR 2 1999
Tetrachloroethylene MR 2 1999
1,2-Dichloropropane MR 2 1999
Benzene MR 2 1999
Public Notice Other 1 2008

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 Blanchardville Waterworks.

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 WI1330071 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 Blanchardville Waterworks 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
2012 Lead and Copper Rule MR 2 SDWIS / WI1330071 / 5000
2008 Coliform (TCR) MR 24 SDWIS / WI1330071 / 3100
2008 Chlorine MR 7 SDWIS / WI1330071 / 0999
2008 Public Notice Other 1 SDWIS / WI1330071 / 7500
2002 CYANIDE MR 4 SDWIS / WI1330071 / 1024
1999 cis-1,2-Dichloroethylene MR 2 SDWIS / WI1330071 / 2380
1999 Xylenes, Total MR 2 SDWIS / WI1330071 / 2955
1999 o-Dichlorobenzene MR 2 SDWIS / WI1330071 / 2968
1999 p-Dichlorobenzene MR 2 SDWIS / WI1330071 / 2969
1999 1,1-Dichloroethylene MR 2 SDWIS / WI1330071 / 2977
1999 1,2-Dichloroethane MR 2 SDWIS / WI1330071 / 2980
1999 Carbon tetrachloride MR 2 SDWIS / WI1330071 / 2982
1999 Trichloroethylene MR 2 SDWIS / WI1330071 / 2984
1999 1,1,2-Trichloroethane MR 2 SDWIS / WI1330071 / 2985
1999 CHLOROBENZENE MR 2 SDWIS / WI1330071 / 2989

How Blanchardville Waterworks Compares

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

Metric Blanchardville Waterworks Wisconsin avg Federal benchmark
Total violations 82 26 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 0 5.3 Indicates a contaminant exceeded a federal MCL
PFAS detection None 38.6% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 810 467 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 Blanchardville Waterworks water safe to drink? ▼
Blanchardville Waterworks (PWS ID: WI1330071) has 82 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 810 people using Groundwater sources.
How many people does Blanchardville Waterworks serve? ▼
Blanchardville Waterworks serves 810 people in Blanchardville, Wisconsin. It is a Local-owned system using Groundwater water sources with 300 service connections.
What type of violations does Blanchardville Waterworks have? ▼
Blanchardville Waterworks has 82 total violations: 0 health-based violations (MCL exceedances or treatment failures), 79 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Blanchardville Waterworks water? ▼
No PFAS testing data is available for Blanchardville Waterworks under the EPA's UCMR5 monitoring program.
What water source does Blanchardville Waterworks use? ▼
Blanchardville Waterworks 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.