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Community Water System · PWS WI6620274

Blair Waterworks

Blair, Wisconsin 54616 - drinking water served from groundwater sources to 1,280 people, tracked in EPA SDWIS and UCMR5.

1,280
People served
199
EPA violations
7
Health-based
Untested
UCMR5 result

The verdict

EPA records 199 drinking-water violations at Blair Waterworks, 4% of them health-based - above the Wisconsin per-system average.

199
Total EPA violations on record
4%
Health-based (MCL / treatment failure)
1,280
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Blair Waterworks

Blair Waterworks is a local-owned community water system that delivers drinking water to 1,280 residents in Blair, Wisconsin (Trempealeau County) through 520 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 199 total violations for this system , of which 7 (4%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 191 monitoring and reporting violations are on file. The most recent violation on record dates to 2021.

The most frequently cited contaminant at this system is Fluoride, 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 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%).

Blair Waterworks's 199 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
1,280
Total Violations
199
Health-Based Violations
7
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
520
County
Trempealeau
School/Daycare
No
MCL Violations
5
Monitoring Violations
191
Treatment Tech Violations
2

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Fluoride MR 8 2005
Benzene MR 8 1994
Styrene MR 8 1994
1,2,4-Trichlorobenzene MR 8 1994
Tetrachloroethylene MR 8 1994
1,1-Dichloroethylene MR 8 1994
1,1,1-Trichloroethane MR 8 1994
1,2-Dichloropropane MR 8 1994
Trichloroethylene MR 8 1994
1,1,2-Trichloroethane MR 8 1994
Toluene MR 8 1994
Ethylbenzene MR 8 1994
DICHLOROMETHANE MR 8 1994
p-Dichlorobenzene MR 8 1994
Vinyl chloride MR 8 1994
1,2-Dichloroethane MR 8 1994
CHLOROBENZENE MR 8 1994
cis-1,2-Dichloroethylene MR 8 1994
o-Dichlorobenzene MR 8 1994
trans-1,2-Dichloroethylene MR 8 1994
Nitrate MR 8 1994
Carbon tetrachloride MR 8 1994
Xylenes, Total MR 8 1994
Coliform (TCR) MCL 5 2000
Coliform (TCR) MR 4 2000
Lead and Copper Rule MR 3 1993
Stage 1 Disinfectants and Disinfection Byproducts Rule TT 2 2021

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 Blair 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 WI6620274 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 Blair 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
2021 Stage 1 Disinfectants and Disinfection Byproducts Rule TT 2 SDWIS / WI6620274 / 0400
2005 Fluoride MR 8 SDWIS / WI6620274 / 1025
2000 Coliform (TCR) MCL 5 SDWIS / WI6620274 / 3100
2000 Coliform (TCR) MR 4 SDWIS / WI6620274 / 3100
1994 Benzene MR 8 SDWIS / WI6620274 / 2990
1994 Styrene MR 8 SDWIS / WI6620274 / 2996
1994 1,2,4-Trichlorobenzene MR 8 SDWIS / WI6620274 / 2378
1994 Tetrachloroethylene MR 8 SDWIS / WI6620274 / 2987
1994 1,1-Dichloroethylene MR 8 SDWIS / WI6620274 / 2977
1994 1,1,1-Trichloroethane MR 8 SDWIS / WI6620274 / 2981
1994 1,2-Dichloropropane MR 8 SDWIS / WI6620274 / 2983
1994 Trichloroethylene MR 8 SDWIS / WI6620274 / 2984
1994 1,1,2-Trichloroethane MR 8 SDWIS / WI6620274 / 2985
1994 Toluene MR 8 SDWIS / WI6620274 / 2991
1994 Ethylbenzene MR 8 SDWIS / WI6620274 / 2992

How Blair Waterworks Compares

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

Metric Blair Waterworks Wisconsin avg Federal benchmark
Total violations 199 26 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 7 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 1,280 467 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 Blair Waterworks water safe to drink? ▼
Blair Waterworks (PWS ID: WI6620274) has 199 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 1,280 people using Groundwater sources.
How many people does Blair Waterworks serve? ▼
Blair Waterworks serves 1,280 people in Blair, Wisconsin. It is a Local-owned system using Groundwater water sources with 520 service connections.
What type of violations does Blair Waterworks have? ▼
Blair Waterworks has 199 total violations: 7 health-based violations (MCL exceedances or treatment failures), 191 monitoring/reporting violations, and 2 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Blair Waterworks water? ▼
No PFAS testing data is available for Blair Waterworks under the EPA's UCMR5 monitoring program.
What water source does Blair Waterworks use? ▼
Blair 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.