Is Baraboo Waterworks Tap Water Safe? Quality Report

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

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

366

violations on file

still open

Violation	Type	Status	Period
MR	Monitoring	Resolved	2020-01-01 → 2020-12-31
MR	Monitoring	Resolved	2020-01-01 → 2020-12-31
MR	Monitoring	Resolved	2020-01-01 → 2020-12-31
MR	Monitoring	Resolved	2020-01-01 → 2020-12-31
MR	Monitoring	Resolved	2020-01-01 → 2020-12-31
MR	Monitoring	Resolved	2020-01-01 → 2020-12-31
MR	Monitoring	Resolved	2020-01-01 → 2020-12-31
MR	Monitoring	Resolved	2020-01-01 → 2020-12-31
MR	Monitoring	Resolved	2009-01-01 → 2009-12-31
MR	Monitoring	Resolved	2009-01-01 → 2009-12-31

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
Fluoride	1200 µg/L 30% of the EPA limit 4000 µg/L worst single sample: 1250 µg/L	101/201	SYR4	2012–2019
Nitrate	5290 µg/L 53% of the EPA limit 10000 µg/L worst single sample: 5400 µg/L	98/102	SYR4	2012–2019
Copper	984.4 µg/L 76% of the EPA limit 1300 µg/L worst single sample: 1220 µg/L	57/60	SYR4	2014–2017
TTHM	10.547 µg/L 13% of the EPA limit 80 µg/L worst single sample: 11.7 µg/L	39/40	SYR4	2012–2019
Dibromochloromethane	3.42 µg/L No EPA limit set worst single sample: 4.2 µg/L	38/52	SYR4	2012–2019
Bromodichloromethane	2.76 µg/L No EPA limit set worst single sample: 2.9 µg/L	35/52	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	7.1655 µg/L 12% of the EPA limit 60 µg/L worst single sample: 10.8 µg/L	35/40	SYR4	2012–2019
Lead	12.94 µg/L 86% of the EPA limit 15 µg/L worst single sample: 19.8 µg/L	33/60	SYR4	2014–2017
Bromoform	3.065 µg/L No EPA limit set worst single sample: 3.2 µg/L	28/52	SYR4	2012–2019
Chloroform	2.798 µg/L No EPA limit set worst single sample: 3.16 µg/L	27/52	SYR4	2012–2019
Monochloroacetic Acid	8.768 µg/L No EPA limit set worst single sample: 10.8 µg/L	17/40	SYR4	2012–2019
Dibromoacetic Acid	0.8350 µg/L No EPA limit set worst single sample: 0.8800 µg/L	16/40	SYR4	2012–2019
Lead	0.0081 mg/L 54% of the EPA limit 0.0150 mg/L	15/15	LCR	2023
Barium	48.86 µg/L 2.4% of the EPA limit 2000 µg/L worst single sample: 56.1 µg/L	9/9	SYR4	2014–2017
Combined Radium (-226 And -228)	4.71 pCi/L 94% of the EPA limit 5 pCi/L worst single sample: 4.77 pCi/L	9/9	SYR4	2014–2017
Dichloroacetic Acid	0.9092 µg/L No EPA limit set worst single sample: 0.9300 µg/L	9/40	SYR4	2012–2019
Nitrate-Nitrite	4540 µg/L 45% of the EPA limit 10000 µg/L worst single sample: 4800 µg/L	9/9	SYR4	2014–2017
Gross Alpha, Excl. Radon And U	4.558 pCi/L 30% of the EPA limit 15 pCi/L worst single sample: 4.6 pCi/L	8/8	SYR4	2014–2017
Trichloroacetic Acid	0.9005 µg/L No EPA limit set worst single sample: 0.9600 µg/L	6/40	SYR4	2012–2019
Monobromoacetic Acid	0.4860 µg/L No EPA limit set worst single sample: 0.4900 µg/L	3/40	SYR4	2012–2019
Chromium	2.365 µg/L 2.4% of the EPA limit 100 µg/L worst single sample: 2.4 µg/L	2/9	SYR4	2014–2017
Selenium	0.7000 µg/L 1.4% of the EPA limit 50 µg/L	1/9	SYR4	2014–2017

87 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalArsenicAtrazineBhc-GammaBenzeneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

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Frequently asked questions about Baraboo Waterworks

Is Baraboo Waterworks tap water safe to drink?

EPA monitoring detected 22 contaminants in Baraboo 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 Baraboo Waterworks's water?

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

How many people does Baraboo Waterworks serve?

Baraboo Waterworks reports serving 12,703 people in Wisconsin, per its EPA record.

Has Baraboo Waterworks had any water quality violations?

The EPA has 366 violations on file for Baraboo Waterworks, 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.