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Non-Transient Non-Community Water System · PWS WI1570393

Devils Head Resort

Merrimac, Wisconsin 53561 - drinking water served from groundwater sources to 535 people, tracked in EPA SDWIS and UCMR5.

535
People served
109
EPA violations
17
Health-based
Untested
UCMR5 result

The verdict

EPA records 109 drinking-water violations at Devils Head Resort, 16% of them health-based - above the Wisconsin per-system average.

109
Total EPA violations on record
16%
Health-based (MCL / treatment failure)
535
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Devils Head Resort

Devils Head Resort is a private-owned non-transient non-community water system that delivers drinking water to 535 residents in Merrimac, Wisconsin (Sauk County) through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 109 total violations for this system , of which 17 (16%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 90 monitoring and reporting violations are on file. The most recent violation on record dates to 2009.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 18 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%).

Devils Head Resort's 109 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
535
Total Violations
109
Health-Based Violations
17
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Private
Connections
1
County
Sauk
School/Daycare
No
MCL Violations
17
Monitoring Violations
90
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 18 2004
Coliform (TCR) MCL 17 2009
Lead and Copper Rule MR 6 1996
1,2,4-Trichlorobenzene MR 3 1996
cis-1,2-Dichloroethylene MR 3 1996
Xylenes, Total MR 3 1996
DICHLOROMETHANE MR 3 1996
1,1-Dichloroethylene MR 3 1996
1,1,1-Trichloroethane MR 3 1996
Carbon tetrachloride MR 3 1996
Trichloroethylene MR 3 1996
Ethylbenzene MR 3 1996
trans-1,2-Dichloroethylene MR 3 1996
Toluene MR 3 1996
Nitrate MR 3 1996
1,2-Dichloroethane MR 3 1996
p-Dichlorobenzene MR 3 1996
Tetrachloroethylene MR 3 1996
o-Dichlorobenzene MR 3 1996
CHLOROBENZENE MR 3 1996
Vinyl chloride MR 3 1996
1,1,2-Trichloroethane MR 3 1996
Benzene MR 3 1996
1,2-Dichloropropane MR 3 1996
Styrene MR 3 1996
Public Notice Other 2 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 Devils Head Resort.

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 WI1570393 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 Devils Head Resort 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
2009 Coliform (TCR) MCL 17 SDWIS / WI1570393 / 3100
2004 Coliform (TCR) MR 18 SDWIS / WI1570393 / 3100
2004 Public Notice Other 2 SDWIS / WI1570393 / 7500
1996 Lead and Copper Rule MR 6 SDWIS / WI1570393 / 5000
1996 1,2,4-Trichlorobenzene MR 3 SDWIS / WI1570393 / 2378
1996 cis-1,2-Dichloroethylene MR 3 SDWIS / WI1570393 / 2380
1996 Xylenes, Total MR 3 SDWIS / WI1570393 / 2955
1996 DICHLOROMETHANE MR 3 SDWIS / WI1570393 / 2964
1996 1,1-Dichloroethylene MR 3 SDWIS / WI1570393 / 2977
1996 1,1,1-Trichloroethane MR 3 SDWIS / WI1570393 / 2981
1996 Carbon tetrachloride MR 3 SDWIS / WI1570393 / 2982
1996 Trichloroethylene MR 3 SDWIS / WI1570393 / 2984
1996 Ethylbenzene MR 3 SDWIS / WI1570393 / 2992
1996 trans-1,2-Dichloroethylene MR 3 SDWIS / WI1570393 / 2979
1996 Toluene MR 3 SDWIS / WI1570393 / 2991

How Devils Head Resort Compares

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

Metric Devils Head Resort Wisconsin avg Federal benchmark
Total violations 109 26 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 17 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 535 467 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 Devils Head Resort water safe to drink? ▼
Devils Head Resort (PWS ID: WI1570393) has 109 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 535 people using Groundwater sources.
How many people does Devils Head Resort serve? ▼
Devils Head Resort serves 535 people in Merrimac, Wisconsin. It is a Private-owned system using Groundwater water sources with 1 service connections.
What type of violations does Devils Head Resort have? ▼
Devils Head Resort has 109 total violations: 17 health-based violations (MCL exceedances or treatment failures), 90 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Devils Head Resort water? ▼
No PFAS testing data is available for Devils Head Resort under the EPA's UCMR5 monitoring program.
What water source does Devils Head Resort use? ▼
Devils Head Resort 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.