Is Mcfarland Waterworks Tap Water Safe? Quality Report

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

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	1993-07-01 → 1993-07-31
MCL	Health-based	Resolved	1993-07-01 → 1993-07-31
MCL	Health-based	Resolved	1993-07-01 → 1993-07-31
MCL	Health-based	Resolved	1993-07-01 → 1993-07-31
MCL	Health-based	Resolved	1993-07-01 → 1993-07-31
MR	Monitoring	Resolved	2008-05-01 → 2008-05-31
MR	Monitoring	Resolved	2008-05-01 → 2008-05-31
MR	Monitoring	Resolved	2008-05-01 → 2008-05-31
MR	Monitoring	Resolved	2008-05-01 → 2008-05-31
MR	Monitoring	Resolved	2008-05-01 → 2008-05-31

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).

Contaminant	Max	Detection rate	Period
PFHXS	0.0037 µg/L	2/6	2024

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	987 µg/L 25% of the EPA limit 4000 µg/L worst single sample: 1110 µg/L	103/206	SYR4	2012–2019
Copper	226.9 µg/L 17% of the EPA limit 1300 µg/L worst single sample: 276 µg/L	43/43	SYR4	2014–2017
Nitrate-Nitrite	3365 µg/L 34% of the EPA limit 10000 µg/L worst single sample: 3530 µg/L	16/24	SYR4	2012–2019
Lead	0.0021 mg/L 14% of the EPA limit 0.0150 mg/L	15/15	LCR	2023
Nitrate	3180 µg/L 32% of the EPA limit 10000 µg/L	8/12	SYR4	2014–2017
TTHM	16.74 µg/L 21% of the EPA limit 80 µg/L worst single sample: 17.7 µg/L	7/8	SYR4	2013–2019
Barium	23.75 µg/L 1.2% of the EPA limit 2000 µg/L worst single sample: 24.1 µg/L	6/6	SYR4	2014–2017
Bromodichloromethane	4.225 µg/L No EPA limit set worst single sample: 4.4 µg/L	6/18	SYR4	2012–2019
Chloroform	7.775 µg/L No EPA limit set worst single sample: 8.3 µg/L	6/18	SYR4	2012–2019
Dibromochloromethane	3.125 µg/L No EPA limit set worst single sample: 3.2 µg/L	6/18	SYR4	2012–2019
Combined Radium (-226 And -228)	0.9024 pCi/L 18% of the EPA limit 5 pCi/L worst single sample: 0.9170 pCi/L	4/4	SYR4	2014–2017
Atrazine	0.0380 µg/L 1.3% of the EPA limit 3 µg/L worst single sample: 0.0400 µg/L	3/3	SYR4	2017
Bromoform	2.09 µg/L No EPA limit set worst single sample: 2.1 µg/L	3/18	SYR4	2012–2019
Gross Alpha, Excl. Radon And U	6.515 pCi/L 43% of the EPA limit 15 pCi/L worst single sample: 6.89 pCi/L	3/3	SYR4	2014–2017
Lead	3.952 µg/L 26% of the EPA limit 15 µg/L worst single sample: 3.99 µg/L	3/43	SYR4	2014–2017
Gross Beta Particle Activity	1.689 pCi/L No EPA limit set worst single sample: 1.72 pCi/L	2/2	SYR4	2014
Methoxychlor	0.0200 µg/L 0.1% of the EPA limit 40 µg/L	1/3	SYR4	2017
Total Haloacetic Acids (HAA5)	1 µg/L 1.7% of the EPA limit 60 µg/L	1/7	SYR4	2013–2019
Trichloroacetic Acid	1 µg/L No EPA limit set	1/7	SYR4	2013–2019

84 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, TotalArsenicBhc-GammaBenzeneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDibromoacetic AcidDichloroacetic AcidDinosebDiquatEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

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Frequently asked questions about Mcfarland Waterworks

Is Mcfarland Waterworks tap water safe to drink?

EPA monitoring detected 20 contaminants in Mcfarland 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 Mcfarland Waterworks's water?

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

How many people does Mcfarland Waterworks serve?

Mcfarland Waterworks reports serving 9,676 people in Wisconsin, per its EPA record.

Has Mcfarland Waterworks had any water quality violations?

The EPA has 27 violations on file for Mcfarland 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.