Is Holmen Waterworks Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Local government
Counties served: La Crosse

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

124

violations on file

still open

Violation	Type	Status	Period
TT	Health-based	Resolved	2024-10-17
TT	Health-based	Resolved	2024-10-17
TT	Health-based	Resolved	2016-07-26
TT	Health-based	Resolved	2016-07-26
TT	Health-based	Resolved	2016-07-26
TT	Health-based	Resolved	2016-07-26
MCL	Health-based	Resolved	2000-07-01 → 2000-07-31
MCL	Health-based	Resolved	2000-07-01 → 2000-07-31
MCL	Health-based	Resolved	2000-07-01 → 2000-07-31
MCL	Health-based	Resolved	2000-07-01 → 2000-07-31

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
Nitrate	6651.5 µg/L 67% of the EPA limit 10000 µg/L worst single sample: 7300 µg/L	200/200	SYR4	2012–2019
Fluoride	779.7 µg/L 19% of the EPA limit 4000 µg/L worst single sample: 1930 µg/L	82/164	SYR4	2013–2019
Copper	626.1 µg/L 48% of the EPA limit 1300 µg/L worst single sample: 1380 µg/L	59/59	SYR4	2014–2017
Tetrachloroethylene	4.635 µg/L 93% of the EPA limit 5 µg/L worst single sample: 4.92 µg/L	31/41	SYR4	2012–2019
Lead	7.3755 µg/L 49% of the EPA limit 15 µg/L worst single sample: 11.2 µg/L	30/59	SYR4	2014–2017
Lead	0.0028 mg/L 19% of the EPA limit 0.0150 mg/L	14/14	LCR	2023
Total Haloacetic Acids (HAA5)	6.6525 µg/L 11% of the EPA limit 60 µg/L worst single sample: 7.878 µg/L	11/11	SYR4	2013–2019
Monochloroacetic Acid	5.383 µg/L No EPA limit set worst single sample: 5.68 µg/L	10/11	SYR4	2013–2019
Barium	75.6 µg/L 3.8% of the EPA limit 2000 µg/L worst single sample: 76.3 µg/L	8/8	SYR4	2014–2017
Nitrate-Nitrite	6258 µg/L 63% of the EPA limit 10000 µg/L worst single sample: 6300 µg/L	8/8	SYR4	2014–2017
Combined Radium (-226 And -228)	3.0975 pCi/L 62% of the EPA limit 5 pCi/L worst single sample: 3.1 pCi/L	6/6	SYR4	2014–2017
TTHM	8.3704 µg/L 10% of the EPA limit 80 µg/L worst single sample: 9.82 µg/L	5/11	SYR4	2013–2019
Bromodichloromethane	2.2416 µg/L No EPA limit set worst single sample: 2.49 µg/L	4/15	SYR4	2013–2019
Chloroform	3.3616 µg/L No EPA limit set worst single sample: 3.88 µg/L	4/15	SYR4	2013–2019
Dibromochloromethane	2.0428 µg/L No EPA limit set worst single sample: 2.26 µg/L	4/15	SYR4	2013–2019
Gross Alpha, Excl. Radon And U	2.685 pCi/L 18% of the EPA limit 15 pCi/L worst single sample: 2.7 pCi/L	4/4	SYR4	2014
Arsenic	1.95 µg/L 20% of the EPA limit 10 µg/L worst single sample: 2 µg/L	2/8	SYR4	2014–2017
Combined Uranium	0.8665 µg/L 2.9% of the EPA limit 30 µg/L worst single sample: 0.9000 µg/L	2/2	SYR4	2017
Selenium	1 µg/L 2% of the EPA limit 50 µg/L	2/8	SYR4	2014–2017
Bromoform	1.19 µg/L No EPA limit set	1/15	SYR4	2013–2019
Dibromoacetic Acid	0.5650 µg/L No EPA limit set	1/11	SYR4	2013–2019
Trichloroacetic Acid	0.4030 µg/L No EPA limit set	1/11	SYR4	2013–2019

52 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, TotalAtrazineBhc-GammaBenzeneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDichloroacetic AcidDinosebDiquatEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidNitriteOxamylPentachlorophenolPicloramSimazineStyreneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Frequently asked questions about Holmen Waterworks

Is Holmen Waterworks tap water safe to drink?

EPA monitoring detected 22 contaminants in Holmen Waterworks'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 Holmen Waterworks's water?

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

How many people does Holmen Waterworks serve?

Holmen Waterworks reports serving 10,147 people, per its EPA record.

Has Holmen Waterworks had any water quality violations?

The EPA has 124 violations on file for Holmen Waterworks, of which 11 are health-based (a contaminant limit or required treatment was breached) and 2 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.