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Community Water System · PWS WI7290124

Lyndon Station Waterworks

Lyndon Station, Wisconsin 53944-0156 - drinking water served from groundwater sources to 474 people, tracked in EPA SDWIS and UCMR5.

474
People served
184
EPA violations
15
Health-based
Untested
UCMR5 result

The verdict

EPA records 184 drinking-water violations at Lyndon Station Waterworks, 8% of them health-based - above the Wisconsin per-system average.

184
Total EPA violations on record
8%
Health-based (MCL / treatment failure)
474
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Lyndon Station Waterworks

Lyndon Station Waterworks is a local-owned community water system that delivers drinking water to 474 residents in Lyndon Station, Wisconsin (Juneau County) through 223 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 184 total violations for this system , of which 15 (8%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 159 monitoring and reporting violations are on file. The most recent violation on record dates to 2020.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 15 violations (MCL, health-based). 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%).

Lyndon Station Waterworks's 184 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
474
Total Violations
184
Health-Based Violations
15
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
223
County
Juneau
School/Daycare
No
MCL Violations
15
Monitoring Violations
159
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 15 1993
Coliform (TCR) MR 4 2013
Revised Total Coliform Rule MON 4 2019
Fluoride MR 4 2020
Mercury MR 4 2020
Nickel MR 4 2020
Arsenic MR 4 2020
Antimony, Total MR 4 2020
Beryllium, Total MR 4 2020
Barium MR 4 2020
Endothall MR 4 2020
Endrin MR 4 2020
BHC-GAMMA MR 4 2020
Methoxychlor MR 4 2020
Diquat MR 4 2020
Glyphosate MR 4 2020
OXAMYL MR 4 2020
Simazine MR 4 2020
Picloram MR 4 2020
Hexachlorocyclopentadiene MR 4 2020
Atrazine MR 4 2020
Chlordane MR 4 2020
2,4-D MR 4 2020
LASSO MR 4 2020
Heptachlor MR 4 2020
HEXACHLOROBENZENE MR 4 2020
Pentachlorophenol MR 4 2020
Chlorine MR 4 2013
Chromium MR 4 2020
Dalapon MR 4 2020

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 Lyndon Station 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 WI7290124 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 Lyndon Station 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
2020 Fluoride MR 4 SDWIS / WI7290124 / 1025
2020 Mercury MR 4 SDWIS / WI7290124 / 1035
2020 Nickel MR 4 SDWIS / WI7290124 / 1036
2020 Arsenic MR 4 SDWIS / WI7290124 / 1005
2020 Antimony, Total MR 4 SDWIS / WI7290124 / 1074
2020 Beryllium, Total MR 4 SDWIS / WI7290124 / 1075
2020 Barium MR 4 SDWIS / WI7290124 / 1010
2020 Endothall MR 4 SDWIS / WI7290124 / 2033
2020 Endrin MR 4 SDWIS / WI7290124 / 2005
2020 BHC-GAMMA MR 4 SDWIS / WI7290124 / 2010
2020 Methoxychlor MR 4 SDWIS / WI7290124 / 2015
2020 Diquat MR 4 SDWIS / WI7290124 / 2032
2020 Glyphosate MR 4 SDWIS / WI7290124 / 2034
2020 OXAMYL MR 4 SDWIS / WI7290124 / 2036
2020 Simazine MR 4 SDWIS / WI7290124 / 2037

How Lyndon Station Waterworks Compares

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

Metric Lyndon Station Waterworks Wisconsin avg Federal benchmark
Total violations 184 26 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 15 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 474 467 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 Lyndon Station Waterworks water safe to drink? ▼
Lyndon Station Waterworks (PWS ID: WI7290124) has 184 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 474 people using Groundwater sources.
How many people does Lyndon Station Waterworks serve? ▼
Lyndon Station Waterworks serves 474 people in Lyndon Station, Wisconsin. It is a Local-owned system using Groundwater water sources with 223 service connections.
What type of violations does Lyndon Station Waterworks have? ▼
Lyndon Station Waterworks has 184 total violations: 15 health-based violations (MCL exceedances or treatment failures), 159 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Lyndon Station Waterworks water? ▼
No PFAS testing data is available for Lyndon Station Waterworks under the EPA's UCMR5 monitoring program.
What water source does Lyndon Station Waterworks use? ▼
Lyndon Station 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.