Is Huntley Tap Water Safe? Quality Report

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

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	Archived	2025-07-01 → 2025-07-31
MCL	Health-based	Archived	2025-07-01 → 2025-07-31
MCL	Health-based	Archived	2025-07-01 → 2025-07-31
MCL	Health-based	Archived	2025-07-01 → 2025-07-31
MCL	Health-based	Archived	2025-07-01 → 2025-07-31
MCL	Health-based	Archived	2025-07-01 → 2025-07-31
MCL	Health-based	Archived	2025-07-01 → 2025-07-31
MCL	Health-based	Resolved	2008-01-01 → 2008-03-31
MCL	Health-based	Resolved	2008-01-01 → 2008-03-31
MCL	Health-based	Resolved	2008-01-01 → 2008-03-31

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
Copper	903.6 µg/L 70% of the EPA limit 1300 µg/L worst single sample: 1100 µg/L	57/90	SYR4	2013–2019
Combined Radium (-226 And -228)	3.4495 pCi/L 69% of the EPA limit 5 pCi/L worst single sample: 6.07 pCi/L	32/37	SYR4	2012–2019
Bromodichloromethane	3.3343 µg/L No EPA limit set worst single sample: 3.61 µg/L	27/27	SYR4	2013–2019
Chloroform	16.14 µg/L No EPA limit set worst single sample: 17.41 µg/L	27/27	SYR4	2013–2019
TTHM	20.7 µg/L 26% of the EPA limit 80 µg/L worst single sample: 21.68 µg/L	27/27	SYR4	2013–2019
Dibromochloromethane	0.9558 µg/L No EPA limit set worst single sample: 1.14 µg/L	22/27	SYR4	2013–2019
Total Haloacetic Acids (HAA5)	5.4715 µg/L 9.1% of the EPA limit 60 µg/L worst single sample: 5.5 µg/L	20/27	SYR4	2013–2019
Trichloroacetic Acid	4.69 µg/L No EPA limit set worst single sample: 5.5 µg/L	19/27	SYR4	2013–2019
Barium	1380 µg/L 69% of the EPA limit 2000 µg/L worst single sample: 1700 µg/L	17/17	SYR4	2012–2019
Lead	0.0010 mg/L 6.7% of the EPA limit 0.0150 mg/L	17/17	LCR	2025
Fluoride	1197 µg/L 30% of the EPA limit 4000 µg/L worst single sample: 1210 µg/L	14/14	SYR4	2012–2018
Lead	8.98 µg/L 60% of the EPA limit 15 µg/L worst single sample: 9.2 µg/L	12/90	SYR4	2013–2019
Nitrate	1600 µg/L 16% of the EPA limit 10000 µg/L	6/80	SYR4	2012–2019
Dichloroacetic Acid	1.792 µg/L No EPA limit set worst single sample: 1.85 µg/L	5/27	SYR4	2013–2019
Dibromoacetic Acid	1.6755 µg/L No EPA limit set worst single sample: 1.68 µg/L	2/27	SYR4	2013–2019
Nitrate-Nitrite	520 µg/L 5.2% of the EPA limit 10000 µg/L	1/14	SYR4	2012–2018

92 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-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromoformChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: FARRELL, TIMOTHY
Phone: 847-515-5285
Email: [email protected]

Frequently asked questions about Huntley

Is Huntley tap water safe to drink?

EPA monitoring detected 16 contaminants in Huntley'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 Huntley's water?

EPA monitoring detected Copper, Combined Radium (-226 And -228), Bromodichloromethane, Chloroform, TTHM, and others. The full list with the level and data source for each is above.

How many people does Huntley serve?

Huntley reports serving 28,495 people in Illinois, per its EPA record.

Has Huntley had any water quality violations?

The EPA has 77 violations on file for Huntley, of which 60 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.