Is Black River Falls Waterworks Tap Water Safe? Quality Report

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

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
TT	Health-based	Resolved	2024-10-17
TT	Health-based	Resolved	2024-10-17
MCL	Health-based	Resolved	1995-10-01 → 1995-10-31
MCL	Health-based	Resolved	1995-10-01 → 1995-10-31
MCL	Health-based	Resolved	1995-10-01 → 1995-10-31
MCL	Health-based	Resolved	1995-10-01 → 1995-10-31
MCL	Health-based	Resolved	1995-10-01 → 1995-10-31
MCL	Health-based	Resolved	1995-10-01 → 1995-10-31
MCL	Health-based	Resolved	1994-02-01 → 1994-02-28
MCL	Health-based	Resolved	1994-02-01 → 1994-02-28

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	1306 µg/L 33% of the EPA limit 4000 µg/L worst single sample: 5500 µg/L	109/210	SYR4	2012–2019
Copper	530 µg/L 41% of the EPA limit 1300 µg/L worst single sample: 1200 µg/L	60/60	SYR4	2012–2018
Lead	9.755 µg/L 65% of the EPA limit 15 µg/L worst single sample: 110 µg/L	48/60	SYR4	2012–2018
Nitrate	475 µg/L 4.8% of the EPA limit 10000 µg/L worst single sample: 490 µg/L	36/48	SYR4	2012–2019
Lead	0.0023 mg/L 15% of the EPA limit 0.0150 mg/L	17/17	LCR	2023
Bromodichloromethane	3.675 µg/L No EPA limit set worst single sample: 3.9 µg/L	10/11	SYR4	2013–2019
Chloroform	15.65 µg/L No EPA limit set worst single sample: 17 µg/L	10/12	SYR4	2013–2019
TTHM	19.225 µg/L 24% of the EPA limit 80 µg/L worst single sample: 19.9 µg/L	10/10	SYR4	2013–2019
Total Haloacetic Acids (HAA5)	4.816 µg/L 8% of the EPA limit 60 µg/L worst single sample: 4.96 µg/L	9/10	SYR4	2013–2019
Barium	43.25 µg/L 2.2% of the EPA limit 2000 µg/L worst single sample: 45 µg/L	8/8	SYR4	2014–2017
Dichloroacetic Acid	2.37 µg/L No EPA limit set worst single sample: 2.4 µg/L	7/10	SYR4	2013–2019
Dibromochloromethane	1.375 µg/L No EPA limit set worst single sample: 1.5 µg/L	6/11	SYR4	2013–2019
Trichloroacetic Acid	2.25 µg/L No EPA limit set worst single sample: 2.3 µg/L	6/10	SYR4	2013–2019
Combined Radium (-226 And -228)	1.3925 pCi/L 28% of the EPA limit 5 pCi/L worst single sample: 1.4 pCi/L	4/4	SYR4	2014
Nitrate-Nitrite	638.5 µg/L 6.4% of the EPA limit 10000 µg/L worst single sample: 670 µg/L	4/8	SYR4	2014–2017
Dibromoacetic Acid	0.4370 µg/L No EPA limit set worst single sample: 0.4600 µg/L	3/10	SYR4	2013–2019

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

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Frequently asked questions about Black River Falls Waterworks

Is Black River Falls Waterworks tap water safe to drink?

EPA monitoring detected 16 contaminants in Black River Falls 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 Black River Falls Waterworks's water?

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

How many people does Black River Falls Waterworks serve?

Black River Falls Waterworks reports serving 3,608 people in Wisconsin, per its EPA record.

Has Black River Falls Waterworks had any water quality violations?

The EPA has 45 violations on file for Black River Falls Waterworks, of which 20 are health-based (a contaminant limit or required treatment was breached) and 1 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.