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Tap water quality report

Williamsburg 220

EPA monitoring tested this supplier for 64 contaminants and detected 9. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

64
contaminants tested
9
detected
32
people served
7
health-based violations
Wisconsin rankingsLead in WisconsinPFAS in Wisconsin
Water source
Ground water
Ownership
Private
Counties served
Ozaukee

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

7
health-based violations
30
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Archived 1993-08-01 → 1993-08-31
MCL Health-based Archived 1993-08-01 → 1993-08-31
MCL Health-based Archived 1993-08-01 → 1993-08-31
MCL Health-based Archived 1993-07-01 → 1993-07-31
MCL Health-based Archived 1993-07-01 → 1993-07-31
MCL Health-based Archived 1993-07-01 → 1993-07-31
MCL Health-based Archived 1993-07-01 → 1993-07-31
Other Monitoring Resolved 2012-10-01
Other Monitoring Resolved 2012-10-01
Other Monitoring Resolved 2012-07-01

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Lead
1.875 µg/L 13%
of the EPA limit 15 µg/L
worst single sample: 2.3 µg/L
18/18 SYR4 2012–2018
Copper
218 µg/L 17%
of the EPA limit 1300 µg/L
worst single sample: 250 µg/L
17/18 SYR4 2012–2018
Lead
0.00020 mg/L 1.3%
of the EPA limit 0.0150 mg/L
 15/15 LCR 2024
Combined Radium (-226 And -228)
3.17455 pCi/L 63%
of the EPA limit 5 pCi/L
worst single sample: 3.3 pCi/L
2/2 SYR4 2015–2018
Gross Alpha, Excl. Radon And U
4.8295 pCi/L 32%
of the EPA limit 15 pCi/L
worst single sample: 4.91 pCi/L
2/2 SYR4 2015–2018
Nitrate
60 µg/L 0.6%
of the EPA limit 10000 µg/L
 2/14 SYR4 2012–2019
Barium
13 µg/L 0.7%
of the EPA limit 2000 µg/L
 1/1 SYR4 2018
Combined Uranium
0.2840 µg/L 0.9%
of the EPA limit 30 µg/L
 1/1 SYR4 2018
Fluoride
1100 µg/L 28%
of the EPA limit 4000 µg/L
 1/1 SYR4 2018
55 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalArsenicAtrazineBhc-GammaBenzeneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDinosebDiquatEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNitrate-NitriteNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Frequently asked questions about Williamsburg 220

Is Williamsburg 220 tap water safe to drink?

EPA monitoring detected 9 contaminants in Williamsburg 220's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Williamsburg 220's water?

EPA monitoring detected Lead, Copper, Lead, Combined Radium (-226 And -228), Gross Alpha, Excl. Radon And U, and others. The full list with the level and data source for each is above.

How many people does Williamsburg 220 serve?

Williamsburg 220 reports serving 32 people in Wisconsin, per its EPA record.

Has Williamsburg 220 had any water quality violations?

The EPA has 30 violations on file for Williamsburg 220, of which 7 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.