Is Windsor Water Utility South Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Local government
Counties served: Dane

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.

health-based violations

violations on file

still open

Violation	Type	Status	Period
MCL	Health-based	Resolved	1994-11-01 → 1994-11-30
MCL	Health-based	Resolved	1994-11-01 → 1994-11-30
MCL	Health-based	Resolved	1994-11-01 → 1994-11-30
MCL	Health-based	Resolved	1994-11-01 → 1994-11-30
MCL	Health-based	Resolved	1994-11-01 → 1994-11-30
MR	Monitoring	Resolved	1994-09-01 → 1994-09-30
MR	Monitoring	Resolved	1994-09-01 → 1994-09-30
MR	Monitoring	Resolved	1994-09-01 → 1994-09-30
MR	Monitoring	Archived	1994-09-01 → 1994-09-30

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.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Fluoride	1070.5 µg/L 27% of the EPA limit 4000 µg/L worst single sample: 1140 µg/L	100/196	SYR4	2012–2019
Copper	160 µg/L 12% of the EPA limit 1300 µg/L	20/20	SYR4	2014–2017
Lead	2.515 µg/L 17% of the EPA limit 15 µg/L worst single sample: 2.8 µg/L	20/20	SYR4	2014–2017
Lead	0.0055 mg/L 37% of the EPA limit 0.0150 mg/L	14/14	LCR	2023
Nitrate	2500 µg/L 25% of the EPA limit 10000 µg/L	12/24	SYR4	2012–2019
Bromodichloromethane	2.78 µg/L No EPA limit set worst single sample: 2.9 µg/L	7/9	SYR4	2013–2019
Chloroform	6.24 µg/L No EPA limit set worst single sample: 6.9 µg/L	7/7	SYR4	2013–2019
Dibromochloromethane	1.54 µg/L No EPA limit set worst single sample: 1.6 µg/L	7/9	SYR4	2013–2019
TTHM	10.887 µg/L 14% of the EPA limit 80 µg/L worst single sample: 11.79 µg/L	7/7	SYR4	2013–2019
Total Haloacetic Acids (HAA5)	1.86 µg/L 3.1% of the EPA limit 60 µg/L worst single sample: 1.99 µg/L	6/7	SYR4	2013–2019
Barium	120 µg/L 6% of the EPA limit 2000 µg/L	4/4	SYR4	2014–2017
Combined Radium (-226 And -228)	2.326 pCi/L 47% of the EPA limit 5 pCi/L worst single sample: 2.44 pCi/L	3/3	SYR4	2014–2017
Dichloroacetic Acid	1.498 µg/L No EPA limit set worst single sample: 1.6 µg/L	3/7	SYR4	2013–2019
Nitrate-Nitrite	2000 µg/L 20% of the EPA limit 10000 µg/L	2/4	SYR4	2014–2017
Trichloroacetic Acid	0.3880 µg/L No EPA limit set worst single sample: 0.3900 µg/L	2/7	SYR4	2013–2019
Chromium	0.8600 µg/L 0.9% of the EPA limit 100 µg/L	1/4	SYR4	2014–2017
Dibromoacetic Acid	0.2300 µg/L No EPA limit set	1/7	SYR4	2013–2019
Gross Alpha, Excl. Radon And U	4.42 pCi/L 29% of the EPA limit 15 pCi/L	1/1	SYR4	2014

56 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, TotalBromoformChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDinosebDiquatEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Frequently asked questions about Windsor Water Utility South

Is Windsor Water Utility South tap water safe to drink?

EPA monitoring detected 18 contaminants in Windsor Water Utility South'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 Windsor Water Utility South's water?

EPA monitoring detected Fluoride, Copper, Lead, Lead, Nitrate, and others. The full list with the level and data source for each is above.

How many people does Windsor Water Utility South serve?

Windsor Water Utility South reports serving 4,607 people in Wisconsin, per its EPA record.

Has Windsor Water Utility South had any water quality violations?

The EPA has 9 violations on file for Windsor Water Utility South, of which 5 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.