Is Middleton 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

118

violations on file

still open

Violation	Type	Status	Period
TT	Health-based	Resolved	2024-10-17
MCL	Health-based	Resolved	2011-09-01 → 2011-09-30
MCL	Health-based	Resolved	2011-09-01 → 2011-09-30
MCL	Health-based	Resolved	2011-09-01 → 2011-09-30
MCL	Health-based	Resolved	2011-09-01 → 2011-09-30
MCL	Health-based	Resolved	2011-09-01 → 2011-09-30
MCL	Health-based	Resolved	1995-08-01 → 1995-08-31
MCL	Health-based	Resolved	1995-08-01 → 1995-08-31
MCL	Health-based	Resolved	1995-08-01 → 1995-08-31
MCL	Health-based	Resolved	1995-08-01 → 1995-08-31

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
Fluoride	919.25 µg/L 23% of the EPA limit 4000 µg/L worst single sample: 1040 µg/L	106/206	SYR4	2012–2019
Copper	220 µg/L 17% of the EPA limit 1300 µg/L worst single sample: 1500 µg/L	64/64	SYR4	2014–2017
Lead	5.65 µg/L 38% of the EPA limit 15 µg/L worst single sample: 21 µg/L	63/64	SYR4	2014–2017
Nitrate	4800 µg/L 48% of the EPA limit 10000 µg/L	34/68	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	18.357 µg/L 31% of the EPA limit 60 µg/L worst single sample: 24.3 µg/L	28/32	SYR4	2012–2019
TTHM	28.354 µg/L 35% of the EPA limit 80 µg/L worst single sample: 173.69 µg/L	27/32	SYR4	2012–2019
Chloroform	23.65 µg/L No EPA limit set worst single sample: 160 µg/L	24/55	SYR4	2012–2019
Bromodichloromethane	5.47 µg/L No EPA limit set worst single sample: 10 µg/L	23/55	SYR4	2012–2019
Dichloroacetic Acid	13.06 µg/L No EPA limit set worst single sample: 15 µg/L	23/32	SYR4	2012–2019
Dibromochloromethane	3.22 µg/L No EPA limit set worst single sample: 3.6 µg/L	20/55	SYR4	2012–2019
Dibromoacetic Acid	1.9 µg/L No EPA limit set worst single sample: 3.5 µg/L	17/32	SYR4	2012–2019
Trichloroacetic Acid	3.94 µg/L No EPA limit set worst single sample: 5.3 µg/L	17/32	SYR4	2012–2019
Lead	0.0040 mg/L 27% of the EPA limit 0.0150 mg/L	15/15	LCR	2023
Combined Radium (-226 And -228)	4.6277 pCi/L 93% of the EPA limit 5 pCi/L worst single sample: 4.629 pCi/L	14/14	SYR4	2012–2017
Barium	73.6 µg/L 3.7% of the EPA limit 2000 µg/L worst single sample: 78 µg/L	12/12	SYR4	2014–2017
Gross Alpha, Excl. Radon And U	4.986 pCi/L 33% of the EPA limit 15 pCi/L worst single sample: 5.55 pCi/L	9/9	SYR4	2012–2017
Nitrate-Nitrite	4750 µg/L 48% of the EPA limit 10000 µg/L worst single sample: 4900 µg/L	7/12	SYR4	2014–2017
Chromium	1.66 µg/L 1.7% of the EPA limit 100 µg/L worst single sample: 1.7 µg/L	5/12	SYR4	2014–2017
Bromoform	0.9755 µg/L No EPA limit set worst single sample: 0.9800 µg/L	4/55	SYR4	2012–2019
Monobromoacetic Acid	0.9400 µg/L No EPA limit set worst single sample: 1 µg/L	4/32	SYR4	2012–2019
Ethylbenzene	1.746 µg/L 0.2% of the EPA limit 700 µg/L worst single sample: 1.8 µg/L	2/25	SYR4	2012–2017
Monochloroacetic Acid	3.27 µg/L No EPA limit set worst single sample: 3.3 µg/L	2/32	SYR4	2012–2019
Xylenes, Total	18.29 µg/L 0.2% of the EPA limit 10000 µg/L worst single sample: 19 µg/L	2/27	SYR4	2012–2017
Thallium, Total	0.2500 µg/L 13% of the EPA limit 2 µg/L	1/12	SYR4	2014–2017

82 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, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDinosebDiquatEthylene DibromideEndothallEndrinGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Frequently asked questions about Middleton Waterworks

Is Middleton Waterworks tap water safe to drink?

EPA monitoring detected 24 contaminants in Middleton 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 Middleton Waterworks's water?

EPA monitoring detected Fluoride, Copper, Lead, Nitrate, Total Haloacetic Acids (HAA5), and others. The full list with the level and data source for each is above.

How many people does Middleton Waterworks serve?

Middleton Waterworks reports serving 23,868 people, per its EPA record.

Has Middleton Waterworks had any water quality violations?

The EPA has 118 violations on file for Middleton Waterworks, of which 11 are health-based (a contaminant limit or required treatment was breached) and 2 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.