Tap WaterIndex

Tap water quality report

La Crosse Waterworks

EPA monitoring tested this supplier for 74 contaminants and detected 27. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

74
contaminants tested
27
detected
53,000
people served
12
health-based violations
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.

12
health-based violations
69
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2013-03-16
TT Health-based Resolved 2013-03-16
TT Health-based Resolved 2013-03-16
TT Health-based Resolved 2013-03-16
TT Health-based Resolved 2013-03-16
TT Health-based Resolved 2013-03-16
TT Health-based Resolved 2013-03-16
TT Health-based Resolved 2013-03-16
MCL Health-based Resolved 2006-03-01 → 2006-03-31
MCL Health-based Resolved 2006-03-01 → 2006-03-31

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 single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Nitrate
5200 µg/L 52%
of the EPA limit 10000 µg/L
 222/244 SYR4 2012–2019
Fluoride
1770 µg/L 44%
of the EPA limit 4000 µg/L
 115/219 SYR4 2012–2019
Chloroform
18.9 µg/L
No EPA limit set
 81/165 SYR4 2012–2019
Trichloroethylene
1.65 µg/L 33%
of the EPA limit 5 µg/L
 66/147 SYR4 2012–2019
Copper
1220 µg/L 94%
of the EPA limit 1300 µg/L
 57/60 SYR4 2014–2017
Tetrachloroethylene
1.77 µg/L 35%
of the EPA limit 5 µg/L
 55/147 SYR4 2012–2019
Bromodichloromethane
11.3 µg/L
No EPA limit set
 53/165 SYR4 2012–2019
Barium
128 µg/L 6.4%
of the EPA limit 2000 µg/L
 27/27 SYR4 2014–2017
Nitrate-Nitrite
5150 µg/L 52%
of the EPA limit 10000 µg/L
 25/27 SYR4 2014–2017
Lead
13.2 µg/L 88%
of the EPA limit 15 µg/L
 22/60 SYR4 2014–2017
Dibromochloromethane
11.4 µg/L
No EPA limit set
 20/165 SYR4 2012–2019
Lead
0.0109 mg/L 73%
of the EPA limit 0.0150 mg/L
 18/18 LCR 2025
TTHM
31.28 µg/L 39%
of the EPA limit 80 µg/L
 18/18 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
28.25 µg/L 47%
of the EPA limit 60 µg/L
 18/18 SYR4 2012–2019
Monochloroacetic Acid
26.9 µg/L
No EPA limit set
 16/18 SYR4 2012–2019
Combined Radium (-226 And -228)
2.55 pCi/L 51%
of the EPA limit 5 pCi/L
 14/14 SYR4 2014–2017
Trichloroacetic Acid
2.58 µg/L
No EPA limit set
 14/18 SYR4 2012–2019
Gross Alpha, Excl. Radon And U
7 pCi/L 47%
of the EPA limit 15 pCi/L
 13/13 SYR4 2014
Bromoform
4.78 µg/L
No EPA limit set
 10/165 SYR4 2012–2019
Selenium
2 µg/L 4%
of the EPA limit 50 µg/L
 9/27 SYR4 2014–2017
Dibromoacetic Acid
2.12 µg/L
No EPA limit set
 6/18 SYR4 2012–2019
Dichloroacetic Acid
2.04 µg/L
No EPA limit set
 6/18 SYR4 2012–2019
Arsenic
4 µg/L 40%
of the EPA limit 10 µg/L
 4/26 SYR4 2014–2017
1,1-Dichloroethylene
0.4770 µg/L 6.8%
of the EPA limit 7 µg/L
 3/147 SYR4 2012–2019
1,1,2-Trichloroethane
0.1950 µg/L 3.9%
of the EPA limit 5 µg/L
 1/147 SYR4 2012–2019
Combined Uranium
0.5900 µg/L 2%
of the EPA limit 30 µg/L
 1/1 SYR4 2017
cis-1,2-Dichloroethylene
0.4530 µg/L 0.6%
of the EPA limit 70 µg/L
 1/147 SYR4 2012–2019
47 contaminants tested, none detected
1,1,1-Trichloroethane1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalAtrazineBhc-GammaBenzeneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDinosebDiquatEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidNitriteOxamylPentachlorophenolPicloramSimazineStyreneThallium, TotalTolueneToxapheneVinyl ChlorideXylenes, TotalO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Frequently asked questions about La Crosse Waterworks

Is La Crosse Waterworks tap water safe to drink?

EPA monitoring detected 27 contaminants in La Crosse 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 La Crosse Waterworks's water?

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

How many people does La Crosse Waterworks serve?

La Crosse Waterworks reports serving 53,000 people, per its EPA record.

Has La Crosse Waterworks had any water quality violations?

The EPA has 69 violations on file for La Crosse Waterworks, of which 12 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.