Tap WaterIndex

← Wisconsin

Tap water quality report

Rib Mountain Water Utility

EPA monitoring tested this supplier for 73 contaminants and detected 21. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

73
contaminants tested
21
detected
6,398
people served
0
health-based violations
Wisconsin rankingsLead in WisconsinPFAS in Wisconsin
Water source
Ground water
Ownership
Local government
Counties served
Marathon

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.

0
health-based violations
9
violations on file
0
still open
ViolationTypeStatusPeriod
MR Monitoring Resolved 2018-01-01 → 2018-12-31
MR Monitoring Resolved 2018-01-01 → 2018-12-31
MR Monitoring Resolved 2018-01-01 → 2018-12-31
MR Monitoring Resolved 2018-01-01 → 2018-12-31
MR Monitoring Resolved 2018-01-01 → 2018-12-31
MR Monitoring Resolved 2018-01-01 → 2018-12-31
MR Monitoring Resolved 2018-01-01 → 2018-12-31
MR Monitoring Resolved 2018-01-01 → 2018-12-31
Other Monitoring Resolved 2000-07-01

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
Fluoride
854.6 µg/L 21%
of the EPA limit 4000 µg/L
worst single sample: 1110 µg/L
103/200 SYR4 2012–2019
Nitrate
2400 µg/L 24%
of the EPA limit 10000 µg/L
worst single sample: 2600 µg/L
48/48 SYR4 2012–2019
Copper
607 µg/L 47%
of the EPA limit 1300 µg/L
worst single sample: 1300 µg/L
40/40 SYR4 2014–2017
Lead
7.61 µg/L 51%
of the EPA limit 15 µg/L
worst single sample: 9.6 µg/L
40/40 SYR4 2014–2017
Lead
0.0024 mg/L 16%
of the EPA limit 0.0150 mg/L
 15/15 LCR 2023
Bromodichloromethane
5.46 µg/L
No EPA limit set
worst single sample: 5.7 µg/L
9/9 SYR4 2013–2019
Chloroform
5.02 µg/L
No EPA limit set
worst single sample: 5.7 µg/L
9/10 SYR4 2013–2019
Barium
169 µg/L 8.5%
of the EPA limit 2000 µg/L
worst single sample: 190 µg/L
8/8 SYR4 2014–2017
Dibromochloromethane
5.395 µg/L
No EPA limit set
worst single sample: 5.5 µg/L
8/9 SYR4 2013–2019
Nitrate-Nitrite
2100 µg/L 21%
of the EPA limit 10000 µg/L
 8/8 SYR4 2014–2017
TTHM
17.42 µg/L 22%
of the EPA limit 80 µg/L
worst single sample: 17.9 µg/L
7/7 SYR4 2013–2019
Total Haloacetic Acids (HAA5)
3.178 µg/L 5.3%
of the EPA limit 60 µg/L
worst single sample: 3.22 µg/L
7/7 SYR4 2013–2019
Bromoform
1.65 µg/L
No EPA limit set
worst single sample: 1.7 µg/L
6/7 SYR4 2013–2019
Dibromoacetic Acid
1.55 µg/L
No EPA limit set
worst single sample: 1.7 µg/L
6/7 SYR4 2013–2019
Trichloroacetic Acid
0.9950 µg/L
No EPA limit set
worst single sample: 1 µg/L
6/7 SYR4 2013–2019
Combined Radium (-226 And -228)
1.80035 pCi/L 36%
of the EPA limit 5 pCi/L
worst single sample: 1.871 pCi/L
4/4 SYR4 2014
Dichloroacetic Acid
1.1 µg/L
No EPA limit set
 4/7 SYR4 2013–2019
Chromium
8.1195 µg/L 8.1%
of the EPA limit 100 µg/L
worst single sample: 8.5 µg/L
2/8 SYR4 2014–2017
Arsenic
1.9 µg/L 19%
of the EPA limit 10 µg/L
 1/8 SYR4 2014–2017
Monobromoacetic Acid
0.4300 µg/L
No EPA limit set
 1/7 SYR4 2013–2019
Toluene
5.6 µg/L 0.6%
of the EPA limit 1000 µg/L
 1/9 SYR4 2014–2018
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 TetrachlorideChlordaneDichloromethaneDalaponDinosebDiquatEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonochloroacetic AcidNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Frequently asked questions about Rib Mountain Water Utility

Is Rib Mountain Water Utility tap water safe to drink?

EPA monitoring detected 21 contaminants in Rib Mountain Water Utility'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 Rib Mountain Water Utility's water?

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

How many people does Rib Mountain Water Utility serve?

Rib Mountain Water Utility reports serving 6,398 people in Wisconsin, per its EPA record.

Has Rib Mountain Water Utility had any water quality violations?

The EPA has 9 violations on file for Rib Mountain Water Utility, of which 0 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.