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Community Water System · PWS WI4430494

Rustic Acres MHP

Costa Mesa, Wisconsin 92626 - drinking water served from groundwater sources to 90 people, tracked in EPA SDWIS and UCMR5.

90
People served
81
EPA violations
11
Health-based
Untested
UCMR5 result

The verdict

EPA records 81 drinking-water violations at Rustic Acres MHP, 14% of them health-based - above the Wisconsin per-system average.

81
Total EPA violations on record
14%
Health-based (MCL / treatment failure)
90
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Rustic Acres MHP

Rustic Acres MHP is a private-owned community water system that delivers drinking water to 90 residents in Costa Mesa, Wisconsin (Oconto County) through 98 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 81 total violations for this system , of which 11 (14%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 64 monitoring and reporting violations are on file. The most recent violation on record dates to 2022.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 33 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%).

Rustic Acres MHP's 81 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
90
Total Violations
81
Health-Based Violations
11
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
98
County
Oconto
School/Daycare
No
MCL Violations
11
Monitoring Violations
64
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 33 2011
Combined Radium (-226 and -228) MCL 11 2022
Chlorine MR 11 2011
E. COLI MR 8 2019
Total Haloacetic Acids (HAA5) MR 6 2008
TTHM MR 6 2008
Consumer Confidence Rule Other 2 2002

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 Rustic Acres MHP.

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 WI4430494 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 Rustic Acres MHP 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
2022 Combined Radium (-226 and -228) MCL 11 SDWIS / WI4430494 / 4010
2019 E. COLI MR 8 SDWIS / WI4430494 / 3014
2011 Coliform (TCR) MR 33 SDWIS / WI4430494 / 3100
2011 Chlorine MR 11 SDWIS / WI4430494 / 0999
2008 Total Haloacetic Acids (HAA5) MR 6 SDWIS / WI4430494 / 2456
2008 TTHM MR 6 SDWIS / WI4430494 / 2950
2002 Consumer Confidence Rule Other 2 SDWIS / WI4430494 / 7000

How Rustic Acres MHP Compares

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

Metric Rustic Acres MHP Wisconsin avg Federal benchmark
Total violations 81 26 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 11 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 90 467 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 Rustic Acres MHP water safe to drink? ▼
Rustic Acres MHP (PWS ID: WI4430494) has 81 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 90 people using Groundwater sources.
How many people does Rustic Acres MHP serve? ▼
Rustic Acres MHP serves 90 people in Costa Mesa, Wisconsin. It is a Private-owned system using Groundwater water sources with 98 service connections.
What type of violations does Rustic Acres MHP have? ▼
Rustic Acres MHP has 81 total violations: 11 health-based violations (MCL exceedances or treatment failures), 64 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Rustic Acres MHP water? ▼
No PFAS testing data is available for Rustic Acres MHP under the EPA's UCMR5 monitoring program.
What water source does Rustic Acres MHP use? ▼
Rustic Acres MHP 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.