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Community Water System · PWS WI2460148

Williamsburg 206

Milwaukee, Wisconsin 53202 - drinking water served from groundwater sources to 48 people, tracked in EPA SDWIS and UCMR5.

48
People served
452
EPA violations
24
Health-based
Untested
UCMR5 result

The verdict

EPA records 452 drinking-water violations at Williamsburg 206, 5% of them health-based - above the Wisconsin per-system average.

452
Total EPA violations on record
5%
Health-based (MCL / treatment failure)
48
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Williamsburg 206

Williamsburg 206 is a private-owned community water system that delivers drinking water to 48 residents in Milwaukee, Wisconsin (Ozaukee County) through 32 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 452 total violations for this system , of which 24 (5%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 386 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 71 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%).

Williamsburg 206's 452 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
48
Total Violations
452
Health-Based Violations
24
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
32
County
Ozaukee
School/Daycare
No
MCL Violations
23
Monitoring Violations
386
Treatment Tech Violations
1

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 71 2010
Consumer Confidence Rule Other 34 2009
Coliform (TCR) MCL 23 2005
Lead and Copper Rule MR 17 2016
Gross Alpha, Excl. Radon and U MR 13 1997
Arsenic MR 12 1997
Cadmium MR 12 1997
Fluoride MR 12 1997
Nitrite MR 12 1997
Selenium MR 12 1997
Mercury MR 12 1997
Chromium MR 12 1997
Barium MR 12 1997
Nitrate MR 9 1997
Nitrate-Nitrite MR 8 1997
Public Notice Other 7 2024
Carbon tetrachloride MR 7 1997
Toluene MR 7 1997
1,2,4-Trichlorobenzene MR 7 1997
cis-1,2-Dichloroethylene MR 7 1997
Xylenes, Total MR 7 1997
o-Dichlorobenzene MR 7 1997
1,2-Dichloroethane MR 7 1997
1,1,1-Trichloroethane MR 7 1997
Trichloroethylene MR 7 1997
Ethylbenzene MR 7 1997
DICHLOROMETHANE MR 7 1997
Vinyl chloride MR 7 1997
1,2-Dichloropropane MR 7 1997
1,1,2-Trichloroethane MR 7 1997

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 Williamsburg 206.

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 WI2460148 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 Williamsburg 206 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
2024 Public Notice Other 7 SDWIS / WI2460148 / 7500
2024 LEAD AND COPPER RULE REVISIONS TT 1 SDWIS / WI2460148 / 5200
2017 Revised Total Coliform Rule MON 4 SDWIS / WI2460148 / 8000
2016 Lead and Copper Rule MR 17 SDWIS / WI2460148 / 5000
2013 E. COLI MR 5 SDWIS / WI2460148 / 3014
2010 Coliform (TCR) MR 71 SDWIS / WI2460148 / 3100
2009 Consumer Confidence Rule Other 34 SDWIS / WI2460148 / 7000
2005 Coliform (TCR) MCL 23 SDWIS / WI2460148 / 3100
1997 Gross Alpha, Excl. Radon and U MR 13 SDWIS / WI2460148 / 4000
1997 Arsenic MR 12 SDWIS / WI2460148 / 1005
1997 Cadmium MR 12 SDWIS / WI2460148 / 1015
1997 Fluoride MR 12 SDWIS / WI2460148 / 1025
1997 Nitrite MR 12 SDWIS / WI2460148 / 1041
1997 Selenium MR 12 SDWIS / WI2460148 / 1045
1997 Mercury MR 12 SDWIS / WI2460148 / 1035

How Williamsburg 206 Compares

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

Metric Williamsburg 206 Wisconsin avg Federal benchmark
Total violations 452 26 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 24 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 48 467 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 Williamsburg 206 water safe to drink? ▼
Williamsburg 206 (PWS ID: WI2460148) has 452 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 48 people using Groundwater sources.
How many people does Williamsburg 206 serve? ▼
Williamsburg 206 serves 48 people in Milwaukee, Wisconsin. It is a Private-owned system using Groundwater water sources with 32 service connections.
What type of violations does Williamsburg 206 have? ▼
Williamsburg 206 has 452 total violations: 24 health-based violations (MCL exceedances or treatment failures), 386 monitoring/reporting violations, and 1 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Williamsburg 206 water? ▼
No PFAS testing data is available for Williamsburg 206 under the EPA's UCMR5 monitoring program.
What water source does Williamsburg 206 use? ▼
Williamsburg 206 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.