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Non-Transient Non-Community Water System · PWS WI2460970

Lakeside Development East & West Bldgs

Mequon, Wisconsin 53092 - drinking water served from groundwater sources to 88 people, tracked in EPA SDWIS and UCMR5.

88
People served
84
EPA violations
0
Health-based
Untested
UCMR5 result

The verdict

EPA records 84 drinking-water violations at Lakeside Development East & West Bldgs - above the Wisconsin per-system average.

84
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
88
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Lakeside Development East & West Bldgs

Lakeside Development East & West Bldgs is a private-owned non-transient non-community water system that delivers drinking water to 88 residents in Mequon, Wisconsin (Ozaukee County) through 2 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 84 total violations for this system , of which 0 (0%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 84 monitoring and reporting violations are on file. The most recent violation on record dates to 2017.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 22 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, 51 of 202 UCMR5-tested systems have reported PFAS detections (25.2%).

Lakeside Development East & West Bldgs's 84 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
88
Total Violations
84
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Private
Connections
2
County
Ozaukee
School/Daycare
No
MCL Violations
0
Monitoring Violations
84
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 22 1998
Lead and Copper Rule MR 14 2015
Revised Total Coliform Rule MON 5 2017
o-Dichlorobenzene MR 2 1995
DICHLOROMETHANE MR 2 1995
Carbon tetrachloride MR 2 1995
Toluene MR 2 1995
1,1,1-Trichloroethane MR 2 1995
1,2-Dichloroethane MR 2 1995
1,1-Dichloroethylene MR 2 1995
Vinyl chloride MR 2 1995
p-Dichlorobenzene MR 2 1995
CHLOROBENZENE MR 2 1995
1,1,2-Trichloroethane MR 2 1995
Styrene MR 2 1995
trans-1,2-Dichloroethylene MR 2 1995
Tetrachloroethylene MR 2 1995
1,2-Dichloropropane MR 2 1995
Ethylbenzene MR 2 1995
Xylenes, Total MR 2 1995
1,2,4-Trichlorobenzene MR 2 1995
cis-1,2-Dichloroethylene MR 2 1995
Benzene MR 2 1995
Trichloroethylene MR 2 1995
Nitrate MR 1 1994

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 Lakeside Development East & West Bldgs.

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 WI2460970 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 Lakeside Development East & West Bldgs 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
2017 Revised Total Coliform Rule MON 5 SDWIS / WI2460970 / 8000
2015 Lead and Copper Rule MR 14 SDWIS / WI2460970 / 5000
1998 Coliform (TCR) MR 22 SDWIS / WI2460970 / 3100
1995 o-Dichlorobenzene MR 2 SDWIS / WI2460970 / 2968
1995 DICHLOROMETHANE MR 2 SDWIS / WI2460970 / 2964
1995 Carbon tetrachloride MR 2 SDWIS / WI2460970 / 2982
1995 Toluene MR 2 SDWIS / WI2460970 / 2991
1995 1,1,1-Trichloroethane MR 2 SDWIS / WI2460970 / 2981
1995 1,2-Dichloroethane MR 2 SDWIS / WI2460970 / 2980
1995 1,1-Dichloroethylene MR 2 SDWIS / WI2460970 / 2977
1995 Vinyl chloride MR 2 SDWIS / WI2460970 / 2976
1995 p-Dichlorobenzene MR 2 SDWIS / WI2460970 / 2969
1995 CHLOROBENZENE MR 2 SDWIS / WI2460970 / 2989
1995 1,1,2-Trichloroethane MR 2 SDWIS / WI2460970 / 2985
1995 Styrene MR 2 SDWIS / WI2460970 / 2996

How Lakeside Development East & West Bldgs Compares

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

Metric Lakeside Development East & West Bldgs Wisconsin avg Federal benchmark
Total violations 84 26 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 0 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 88 467 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 Lakeside Development East & West Bldgs water safe to drink? ▼
Lakeside Development East & West Bldgs (PWS ID: WI2460970) has 84 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 88 people using Groundwater sources.
How many people does Lakeside Development East & West Bldgs serve? ▼
Lakeside Development East & West Bldgs serves 88 people in Mequon, Wisconsin. It is a Private-owned system using Groundwater water sources with 2 service connections.
What type of violations does Lakeside Development East & West Bldgs have? ▼
Lakeside Development East & West Bldgs has 84 total violations: 0 health-based violations (MCL exceedances or treatment failures), 84 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Lakeside Development East & West Bldgs water? ▼
No PFAS testing data is available for Lakeside Development East & West Bldgs under the EPA's UCMR5 monitoring program.
What water source does Lakeside Development East & West Bldgs use? ▼
Lakeside Development East & West Bldgs 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.