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Transient Non-Community Water System · PWS WI2461287

North Shore Dental

Mequon, Wisconsin 53092 - drinking water served from groundwater sources to 32 people, tracked in EPA SDWIS and UCMR5.

32
People served
523
EPA violations
229
Health-based
Untested
UCMR5 result

The verdict

EPA records 523 drinking-water violations at North Shore Dental, 44% of them health-based - above the Wisconsin per-system average.

523
Total EPA violations on record
44%
Health-based (MCL / treatment failure)
32
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: North Shore Dental

North Shore Dental is a private-owned transient non-community water system that delivers drinking water to 32 residents in Mequon, Wisconsin (Ozaukee County) through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 523 total violations for this system , of which 229 (44%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 292 monitoring and reporting violations are on file. The most recent violation on record dates to 2011.

The most frequently cited contaminant at this system is Arsenic, recorded in 217 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, 51 of 202 UCMR5-tested systems have reported PFAS detections (25.2%).

North Shore Dental's 523 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
32
Total Violations
523
Health-Based Violations
229
Water Source
Groundwater

System Details

System Type
Transient Non-Community
Owner Type
Private
Connections
1
County
Ozaukee
School/Daycare
Yes
MCL Violations
229
Monitoring Violations
292
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Arsenic MCL 217 2011
Ethylbenzene MR 12 1996
cis-1,2-Dichloroethylene MR 12 1996
1,2,4-Trichlorobenzene MR 12 1996
DICHLOROMETHANE MR 12 1996
Xylenes, Total MR 12 1996
o-Dichlorobenzene MR 12 1996
Vinyl chloride MR 12 1996
1,1-Dichloroethylene MR 12 1996
Carbon tetrachloride MR 12 1996
Benzene MR 12 1996
Styrene MR 12 1996
p-Dichlorobenzene MR 12 1996
trans-1,2-Dichloroethylene MR 12 1996
Toluene MR 12 1996
1,1,1-Trichloroethane MR 12 1996
CHLOROBENZENE MR 12 1996
1,2-Dichloroethane MR 12 1996
Trichloroethylene MR 12 1996
1,2-Dichloropropane MR 12 1996
Tetrachloroethylene MR 12 1996
Coliform (TCR) MCL 12 2011
1,1,2-Trichloroethane MR 12 1996
Coliform (TCR) MR 7 2000
Nitrite MR 3 1995
Fluoride MR 3 1995
Selenium MR 3 1995
Arsenic MR 3 1995
Barium MR 3 1995
Chromium MR 3 1995

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 North Shore Dental.

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 WI2461287 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 North Shore Dental 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
2011 Arsenic MCL 217 SDWIS / WI2461287 / 1005
2011 Coliform (TCR) MCL 12 SDWIS / WI2461287 / 3100
2010 Public Notice Other 2 SDWIS / WI2461287 / 7500
2000 Coliform (TCR) MR 7 SDWIS / WI2461287 / 3100
1996 Ethylbenzene MR 12 SDWIS / WI2461287 / 2992
1996 cis-1,2-Dichloroethylene MR 12 SDWIS / WI2461287 / 2380
1996 1,2,4-Trichlorobenzene MR 12 SDWIS / WI2461287 / 2378
1996 DICHLOROMETHANE MR 12 SDWIS / WI2461287 / 2964
1996 Xylenes, Total MR 12 SDWIS / WI2461287 / 2955
1996 o-Dichlorobenzene MR 12 SDWIS / WI2461287 / 2968
1996 Vinyl chloride MR 12 SDWIS / WI2461287 / 2976
1996 1,1-Dichloroethylene MR 12 SDWIS / WI2461287 / 2977
1996 Carbon tetrachloride MR 12 SDWIS / WI2461287 / 2982
1996 Benzene MR 12 SDWIS / WI2461287 / 2990
1996 Styrene MR 12 SDWIS / WI2461287 / 2996

How North Shore Dental Compares

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

Metric North Shore Dental Wisconsin avg Federal benchmark
Total violations 523 26 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 229 5.3 Indicates a contaminant exceeded a federal MCL
PFAS detection None 25.2% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 32 467 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 North Shore Dental water safe to drink? ▼
North Shore Dental (PWS ID: WI2461287) has 523 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 32 people using Groundwater sources.
How many people does North Shore Dental serve? ▼
North Shore Dental serves 32 people in Mequon, Wisconsin. It is a Private-owned system using Groundwater water sources with 1 service connections.
What type of violations does North Shore Dental have? ▼
North Shore Dental has 523 total violations: 229 health-based violations (MCL exceedances or treatment failures), 292 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in North Shore Dental water? ▼
No PFAS testing data is available for North Shore Dental under the EPA's UCMR5 monitoring program.
What water source does North Shore Dental use? ▼
North Shore Dental uses Groundwater as its primary water source. It is classified as a Transient Non-Community Water System, serving transient populations.
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.