PlainWater
States → Wisconsin

Non-Transient Non-Community Water System · PWS WI1110375

McDonalds Restaurant Poynette

Poynette, Wisconsin 53955 - drinking water served from groundwater sources to 845 people, tracked in EPA SDWIS and UCMR5.

845
People served
237
EPA violations
20
Health-based
Untested
UCMR5 result

The verdict

EPA records 237 drinking-water violations at McDonalds Restaurant Poynette, 8% of them health-based - above the Wisconsin per-system average.

237
Total EPA violations on record
8%
Health-based (MCL / treatment failure)
845
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: McDonalds Restaurant Poynette

McDonalds Restaurant Poynette is a private-owned non-transient non-community water system that delivers drinking water to 845 residents in Poynette, Wisconsin (Columbia County) through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 237 total violations for this system , of which 20 (8%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 212 monitoring and reporting violations are on file. The most recent violation on record dates to 2004.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 44 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%).

McDonalds Restaurant Poynette's 237 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
845
Total Violations
237
Health-Based Violations
20
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Private
Connections
1
County
Columbia
School/Daycare
No
MCL Violations
20
Monitoring Violations
212
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 44 2003
Coliform (TCR) MCL 20 2000
1,2,4-Trichlorobenzene MR 8 2004
Xylenes, Total MR 8 2004
o-Dichlorobenzene MR 8 2004
Vinyl chloride MR 8 2004
1,1-Dichloroethylene MR 8 2004
1,2-Dichloroethane MR 8 2004
Carbon tetrachloride MR 8 2004
1,2-Dichloropropane MR 8 2004
Trichloroethylene MR 8 2004
1,1,2-Trichloroethane MR 8 2004
Toluene MR 8 2004
Ethylbenzene MR 8 2004
trans-1,2-Dichloroethylene MR 8 2004
Tetrachloroethylene MR 8 2004
DICHLOROMETHANE MR 8 2004
Styrene MR 8 2004
Benzene MR 8 2004
p-Dichlorobenzene MR 8 2004
1,1,1-Trichloroethane MR 8 2004
CHLOROBENZENE MR 8 2004
cis-1,2-Dichloroethylene MR 8 2004

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 McDonalds Restaurant Poynette.

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 WI1110375 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 McDonalds Restaurant Poynette 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
2004 1,2,4-Trichlorobenzene MR 8 SDWIS / WI1110375 / 2378
2004 Xylenes, Total MR 8 SDWIS / WI1110375 / 2955
2004 o-Dichlorobenzene MR 8 SDWIS / WI1110375 / 2968
2004 Vinyl chloride MR 8 SDWIS / WI1110375 / 2976
2004 1,1-Dichloroethylene MR 8 SDWIS / WI1110375 / 2977
2004 1,2-Dichloroethane MR 8 SDWIS / WI1110375 / 2980
2004 Carbon tetrachloride MR 8 SDWIS / WI1110375 / 2982
2004 1,2-Dichloropropane MR 8 SDWIS / WI1110375 / 2983
2004 Trichloroethylene MR 8 SDWIS / WI1110375 / 2984
2004 1,1,2-Trichloroethane MR 8 SDWIS / WI1110375 / 2985
2004 Toluene MR 8 SDWIS / WI1110375 / 2991
2004 Ethylbenzene MR 8 SDWIS / WI1110375 / 2992
2004 trans-1,2-Dichloroethylene MR 8 SDWIS / WI1110375 / 2979
2004 Tetrachloroethylene MR 8 SDWIS / WI1110375 / 2987
2004 DICHLOROMETHANE MR 8 SDWIS / WI1110375 / 2964

How McDonalds Restaurant Poynette Compares

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

Metric McDonalds Restaurant Poynette Wisconsin avg Federal benchmark
Total violations 237 26 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 20 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 845 467 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 McDonalds Restaurant Poynette water safe to drink? ▼
McDonalds Restaurant Poynette (PWS ID: WI1110375) has 237 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 845 people using Groundwater sources.
How many people does McDonalds Restaurant Poynette serve? ▼
McDonalds Restaurant Poynette serves 845 people in Poynette, Wisconsin. It is a Private-owned system using Groundwater water sources with 1 service connections.
What type of violations does McDonalds Restaurant Poynette have? ▼
McDonalds Restaurant Poynette has 237 total violations: 20 health-based violations (MCL exceedances or treatment failures), 212 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in McDonalds Restaurant Poynette water? ▼
No PFAS testing data is available for McDonalds Restaurant Poynette under the EPA's UCMR5 monitoring program.
What water source does McDonalds Restaurant Poynette use? ▼
McDonalds Restaurant Poynette uses Groundwater as its primary water source. It is classified as a Non-Transient Non-Community Water System, serving the same people for at least 6 months per year.
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.