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Community Water System · PWS WI1110099

Friesland Waterworks

Friesland, Wisconsin 53935-0208 - drinking water served from groundwater sources to 345 people, tracked in EPA SDWIS and UCMR5.

345
People served
127
EPA violations
46
Health-based
Untested
UCMR5 result

The verdict

EPA records 127 drinking-water violations at Friesland Waterworks, 36% of them health-based - above the Wisconsin per-system average.

127
Total EPA violations on record
36%
Health-based (MCL / treatment failure)
345
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Friesland Waterworks

Friesland Waterworks is a local-owned community water system that delivers drinking water to 345 residents in Friesland, Wisconsin (Columbia County) through 127 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 127 total violations for this system , of which 46 (36%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 74 monitoring and reporting violations are on file. The most recent violation on record dates to 2023.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 22 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%).

Friesland Waterworks's 127 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
345
Total Violations
127
Health-Based Violations
46
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
127
County
Columbia
School/Daycare
No
MCL Violations
30
Monitoring Violations
74
Treatment Tech Violations
16

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 22 2012
Groundwater Rule TT 12 2019
Lead and Copper Rule MR 10 2022
Nitrate MCL 8 2002
Coliform (TCR) MR 8 2009
Revised Total Coliform Rule MON 4 2019
Lead and Copper Rule TT 4 2020
Radium-228 MR 4 2009
Public Notice Other 2 2021
Groundwater Rule Other 2 2023
Endrin MR 2 1993
BHC-GAMMA MR 2 1993
Toxaphene MR 2 1993
Hexachlorocyclopentadiene MR 2 1993
Aldicarb sulfoxide MR 2 1993
Aldicarb sulfone MR 2 1993
2,4-D MR 2 1993
HEXACHLOROBENZENE MR 2 1993
Pentachlorophenol MR 2 1993
Total Polychlorinated Biphenyls (PCB) MR 2 1993
Picloram MR 2 1993
Dalapon MR 2 1993
Simazine MR 2 1993
Chlordane MR 2 1993
Heptachlor MR 2 1993
2,4,5-TP MR 2 1993
OXAMYL MR 2 1993
LASSO MR 2 1993
Carbofuran MR 2 1993
Atrazine MR 2 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 Friesland 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 WI1110099 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 Friesland 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
2023 Groundwater Rule Other 2 SDWIS / WI1110099 / 0700
2022 Lead and Copper Rule MR 10 SDWIS / WI1110099 / 5000
2021 Public Notice Other 2 SDWIS / WI1110099 / 7500
2020 Lead and Copper Rule TT 4 SDWIS / WI1110099 / 5000
2019 Groundwater Rule TT 12 SDWIS / WI1110099 / 0700
2019 Revised Total Coliform Rule MON 4 SDWIS / WI1110099 / 8000
2013 Consumer Confidence Rule Other 1 SDWIS / WI1110099 / 7000
2012 Coliform (TCR) MCL 22 SDWIS / WI1110099 / 3100
2009 Coliform (TCR) MR 8 SDWIS / WI1110099 / 3100
2009 Radium-228 MR 4 SDWIS / WI1110099 / 4030
2002 Nitrate MCL 8 SDWIS / WI1110099 / 1040
1993 Endrin MR 2 SDWIS / WI1110099 / 2005
1993 BHC-GAMMA MR 2 SDWIS / WI1110099 / 2010
1993 Toxaphene MR 2 SDWIS / WI1110099 / 2020
1993 Hexachlorocyclopentadiene MR 2 SDWIS / WI1110099 / 2042

How Friesland Waterworks Compares

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

Metric Friesland Waterworks Wisconsin avg Federal benchmark
Total violations 127 26 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 46 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 345 467 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 Friesland Waterworks water safe to drink? ▼
Friesland Waterworks (PWS ID: WI1110099) has 127 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 345 people using Groundwater sources.
How many people does Friesland Waterworks serve? ▼
Friesland Waterworks serves 345 people in Friesland, Wisconsin. It is a Local-owned system using Groundwater water sources with 127 service connections.
What type of violations does Friesland Waterworks have? ▼
Friesland Waterworks has 127 total violations: 46 health-based violations (MCL exceedances or treatment failures), 74 monitoring/reporting violations, and 16 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Friesland Waterworks water? ▼
No PFAS testing data is available for Friesland Waterworks under the EPA's UCMR5 monitoring program.
What water source does Friesland Waterworks use? ▼
Friesland 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.