Is Janesville Water Utility Tap Water Safe? Quality Report

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

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	2002-12-01 → 2002-12-31
MCL	Health-based	Resolved	2002-12-01 → 2002-12-31
MCL	Health-based	Resolved	2002-12-01 → 2002-12-31
MCL	Health-based	Resolved	2002-12-01 → 2002-12-31
MCL	Health-based	Resolved	2002-12-01 → 2002-12-31
MON	Monitoring	Resolved	2016-04-01 → 2016-04-30
MON	Monitoring	Resolved	2016-04-01 → 2016-04-30
MON	Monitoring	Resolved	2016-04-01 → 2016-04-30
MON	Monitoring	Resolved	2016-04-01 → 2016-04-30

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	8700 µg/L 87% of the EPA limit 10000 µg/L worst single sample: 11000 µg/L	216/218	SYR4	2013–2019
Fluoride	940 µg/L 24% of the EPA limit 4000 µg/L worst single sample: 1060 µg/L	114/222	SYR4	2012–2019
Copper	244.5 µg/L 19% of the EPA limit 1300 µg/L worst single sample: 420 µg/L	92/92	SYR4	2013–2017
Lead	9.535 µg/L 64% of the EPA limit 15 µg/L worst single sample: 14 µg/L	92/92	SYR4	2013–2017
Nitrate-Nitrite	11725 µg/L 117% of the EPA limit, at the 95th percentile of samples — 10000 µg/L worst single sample: 12000 µg/L	36/40	SYR4	2012–2017
Dibromochloromethane	5.58 µg/L No EPA limit set worst single sample: 6.4 µg/L	29/46	SYR4	2012–2019
Bromodichloromethane	4.1 µg/L No EPA limit set worst single sample: 4.7 µg/L	25/46	SYR4	2012–2019
Bromoform	5.195 µg/L No EPA limit set worst single sample: 5.6 µg/L	22/46	SYR4	2012–2019
TTHM	16.54 µg/L 21% of the EPA limit 80 µg/L worst single sample: 17.8 µg/L	19/19	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	1.479 µg/L 2.5% of the EPA limit 60 µg/L worst single sample: 1.56 µg/L	19/19	SYR4	2012–2019
Chloroform	3.02 µg/L No EPA limit set worst single sample: 3.1 µg/L	17/46	SYR4	2012–2019
Dibromoacetic Acid	1.125 µg/L No EPA limit set worst single sample: 1.2 µg/L	16/19	SYR4	2012–2019
Lead	0.0100 mg/L 67% of the EPA limit 0.0150 mg/L	14/14	LCR	2020
Barium	55.65 µg/L 2.8% of the EPA limit 2000 µg/L worst single sample: 56 µg/L	8/8	SYR4	2014–2017
Combined Radium (-226 And -228)	1.8904 pCi/L 38% of the EPA limit 5 pCi/L worst single sample: 1.934 pCi/L	5/5	SYR4	2014
Dichloroacetic Acid	0.5430 µg/L No EPA limit set worst single sample: 0.5700 µg/L	4/19	SYR4	2012–2019
Cyanide	15 µg/L 7.5% of the EPA limit 200 µg/L	1/2	SYR4	2014–2017
Ethylbenzene	0.9000 µg/L 0.1% of the EPA limit 700 µg/L	1/27	SYR4	2012–2019
Gross Alpha, Excl. Radon And U	6.48 pCi/L 43% of the EPA limit 15 pCi/L	1/1	SYR4	2014
Toluene	1.3 µg/L 0.1% of the EPA limit 1000 µg/L	1/27	SYR4	2012–2019
Xylenes, Total	4.4 µg/L 0% of the EPA limit 10000 µg/L	1/27	SYR4	2012–2019

86 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalArsenicAtrazineBhc-GammaBenzeneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEndothallEndrinGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroacetic AcidTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Frequently asked questions about Janesville Water Utility

Is Janesville Water Utility tap water safe to drink?

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

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

How many people does Janesville Water Utility serve?

Janesville Water Utility reports serving 64,415 people, per its EPA record.

Has Janesville Water Utility had any water quality violations?

The EPA has 9 violations on file for Janesville Water Utility, 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.