Is Wausau Waterworks Tap Water Safe? Quality Report

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.

health-based violations

violations on file

still open

Violation	Type	Status	Period
MCL	Health-based	Resolved	2000-09-01 → 2000-09-30
MCL	Health-based	Resolved	2000-09-01 → 2000-09-30
MCL	Health-based	Resolved	2000-09-01 → 2000-09-30
MCL	Health-based	Resolved	2000-09-01 → 2000-09-30
MCL	Health-based	Resolved	2000-09-01 → 2000-09-30
MR	Monitoring	Resolved	1994-10-01 → 1994-10-31
MR	Monitoring	Resolved	1992-08-01 → 1992-08-31
MR	Monitoring	Resolved	1992-08-01 → 1992-08-31
MR	Monitoring	Resolved	1992-08-01 → 1992-08-31
MR	Monitoring	Resolved	1992-08-01 → 1992-08-31

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
Copper	82.757 µg/L 6.4% of the EPA limit 1300 µg/L worst single sample: 211.2 µg/L	258/280	SYR4	2014–2019
Lead	17.7365 µg/L 118% of the EPA limit, at the 95th percentile of samples — 15 µg/L worst single sample: 170 µg/L	218/280	SYR4	2014–2019
Fluoride	1130.5 µg/L 28% of the EPA limit 4000 µg/L worst single sample: 1200 µg/L	100/196	SYR4	2012–2019
Chloroform	22.75 µg/L No EPA limit set worst single sample: 27 µg/L	66/66	SYR4	2012–2019
Nitrate	957.5 µg/L 9.6% of the EPA limit 10000 µg/L worst single sample: 980 µg/L	24/24	SYR4	2012–2019
Bromodichloromethane	1.5 µg/L No EPA limit set worst single sample: 3.5 µg/L	22/66	SYR4	2012–2019
Lead	0.0058 mg/L 39% of the EPA limit 0.0150 mg/L	19/19	LCR	2020
TTHM	20.875 µg/L 26% of the EPA limit 80 µg/L worst single sample: 27.88 µg/L	16/16	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	19.32 µg/L 32% of the EPA limit 60 µg/L worst single sample: 19.38 µg/L	16/16	SYR4	2012–2019
Trichloroacetic Acid	3.875 µg/L No EPA limit set worst single sample: 4.7 µg/L	16/16	SYR4	2012–2019
Dichloroacetic Acid	13.3 µg/L No EPA limit set worst single sample: 14 µg/L	15/16	SYR4	2012–2019
Monochloroacetic Acid	3.42 µg/L No EPA limit set worst single sample: 3.7 µg/L	9/16	SYR4	2012–2019
Barium	6.4 µg/L 0.3% of the EPA limit 2000 µg/L	4/4	SYR4	2014–2017
Nitrate-Nitrite	864.5 µg/L 8.6% of the EPA limit 10000 µg/L worst single sample: 920 µg/L	4/4	SYR4	2014–2017
Combined Radium (-226 And -228)	0.7850 pCi/L 16% of the EPA limit 5 pCi/L worst single sample: 0.8000 pCi/L	2/2	SYR4	2014
Nitrite	21 µg/L 2.1% of the EPA limit 1000 µg/L	1/4	SYR4	2014–2017

59 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 TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDibromochloromethaneDinosebDiquatEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Frequently asked questions about Wausau Waterworks

Is Wausau Waterworks tap water safe to drink?

EPA monitoring detected 16 contaminants in Wausau 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 Wausau Waterworks's water?

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

How many people does Wausau Waterworks serve?

Wausau Waterworks reports serving 39,994 people, per its EPA record.

Has Wausau Waterworks had any water quality violations?

The EPA has 15 violations on file for Wausau Waterworks, 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.