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Community Water System · PWS WI7210108

Laona Sanitary Dist

Laona, Wisconsin 54541 - drinking water served from groundwater sources to 950 people, tracked in EPA SDWIS and UCMR5.

950
People served
229
EPA violations
18
Health-based
Untested
UCMR5 result

The verdict

EPA records 229 drinking-water violations at Laona Sanitary Dist, 8% of them health-based - above the Wisconsin per-system average.

229
Total EPA violations on record
8%
Health-based (MCL / treatment failure)
950
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Laona Sanitary Dist

Laona Sanitary Dist is a local-owned community water system that delivers drinking water to 950 residents in Laona, Wisconsin (Forest County) through 442 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 229 total violations for this system , of which 18 (8%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 187 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 28 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%).

Laona Sanitary Dist's 229 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
950
Total Violations
229
Health-Based Violations
18
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
442
County
Forest
School/Daycare
No
MCL Violations
15
Monitoring Violations
187
Treatment Tech Violations
3

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 28 2008
Coliform (TCR) MCL 15 2010
Consumer Confidence Rule Other 14 2023
Revised Total Coliform Rule MON 4 2022
Total Haloacetic Acids (HAA5) MR 4 2022
Benzene MR 4 1997
Toluene MR 4 1997
Xylenes, Total MR 4 1997
Tetrachloroethylene MR 4 1997
1,2-Dichloropropane MR 4 1997
Carbon tetrachloride MR 4 1997
1,1,1-Trichloroethane MR 4 1997
1,2-Dichloroethane MR 4 1997
trans-1,2-Dichloroethylene MR 4 1997
p-Dichlorobenzene MR 4 1997
o-Dichlorobenzene MR 4 1997
Styrene MR 4 1997
Ethylbenzene MR 4 1997
Trichloroethylene MR 4 1997
1,2,4-Trichlorobenzene MR 4 1997
cis-1,2-Dichloroethylene MR 4 1997
1,1,2-Trichloroethane MR 4 1997
TTHM MR 4 2022
1,1-Dichloroethylene MR 4 1997
DICHLOROMETHANE MR 4 1997
Vinyl chloride MR 4 1997
CHLOROBENZENE MR 4 1997
Chlorine MR 4 2008
Public Notice Other 3 2024
Lead and Copper Rule MR 3 1993

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 Laona Sanitary Dist.

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 WI7210108 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 Laona Sanitary Dist 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
2024 Public Notice Other 3 SDWIS / WI7210108 / 7500
2024 LEAD AND COPPER RULE REVISIONS RPT 1 SDWIS / WI7210108 / 5200
2024 LEAD AND COPPER RULE REVISIONS TT 1 SDWIS / WI7210108 / 5200
2023 Consumer Confidence Rule Other 14 SDWIS / WI7210108 / 7000
2022 Revised Total Coliform Rule MON 4 SDWIS / WI7210108 / 8000
2022 Total Haloacetic Acids (HAA5) MR 4 SDWIS / WI7210108 / 2456
2022 TTHM MR 4 SDWIS / WI7210108 / 2950
2010 Coliform (TCR) MCL 15 SDWIS / WI7210108 / 3100
2008 Coliform (TCR) MR 28 SDWIS / WI7210108 / 3100
2008 Chlorine MR 4 SDWIS / WI7210108 / 0999
1997 Benzene MR 4 SDWIS / WI7210108 / 2990
1997 Toluene MR 4 SDWIS / WI7210108 / 2991
1997 Xylenes, Total MR 4 SDWIS / WI7210108 / 2955
1997 Tetrachloroethylene MR 4 SDWIS / WI7210108 / 2987
1997 1,2-Dichloropropane MR 4 SDWIS / WI7210108 / 2983

How Laona Sanitary Dist Compares

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

Metric Laona Sanitary Dist Wisconsin avg Federal benchmark
Total violations 229 26 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 18 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 950 467 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 Laona Sanitary Dist water safe to drink? ▼
Laona Sanitary Dist (PWS ID: WI7210108) has 229 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 950 people using Groundwater sources.
How many people does Laona Sanitary Dist serve? ▼
Laona Sanitary Dist serves 950 people in Laona, Wisconsin. It is a Local-owned system using Groundwater water sources with 442 service connections.
What type of violations does Laona Sanitary Dist have? ▼
Laona Sanitary Dist has 229 total violations: 18 health-based violations (MCL exceedances or treatment failures), 187 monitoring/reporting violations, and 3 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Laona Sanitary Dist water? ▼
No PFAS testing data is available for Laona Sanitary Dist under the EPA's UCMR5 monitoring program.
What water source does Laona Sanitary Dist use? ▼
Laona Sanitary Dist 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.