Is Blue Island Tap Water Safe? Quality Report

Water source: SWP
Ownership: Local government
Counties served: Cook

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
TT	Health-based	Resolved	1992-12-07
TT	Health-based	Resolved	1992-12-07
MCL	Health-based	Archived	1991-09-01 → 1991-09-30
MCL	Health-based	Archived	1991-09-01 → 1991-09-30
Other	Monitoring	Resolved	2023-07-01
Other	Monitoring	Resolved	2023-07-01
Other	Monitoring	Resolved	2022-07-01
Other	Monitoring	Resolved	2022-07-01
MR	Monitoring	Resolved	2020-12-30
MR	Monitoring	Resolved	2020-12-30

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
Bromodichloromethane	13.3 µg/L No EPA limit set worst single sample: 15.7 µg/L	71/71	SYR4	2012–2019
Chloroform	26.7 µg/L No EPA limit set worst single sample: 32.7 µg/L	71/71	SYR4	2012–2019
Dibromochloromethane	6.875 µg/L No EPA limit set worst single sample: 7.57 µg/L	71/71	SYR4	2012–2019
Dichloroacetic Acid	10.55 µg/L No EPA limit set worst single sample: 14.6 µg/L	71/71	SYR4	2012–2019
TTHM	46.05 µg/L 58% of the EPA limit 80 µg/L worst single sample: 53.4 µg/L	71/71	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	20.705 µg/L 35% of the EPA limit 60 µg/L worst single sample: 26.5 µg/L	71/71	SYR4	2012–2019
Trichloroacetic Acid	8.705 µg/L No EPA limit set worst single sample: 11.2 µg/L	71/71	SYR4	2012–2019
Monobromoacetic Acid	2.115 µg/L No EPA limit set worst single sample: 2.9 µg/L	51/71	SYR4	2012–2019
Lead	12.28 µg/L 82% of the EPA limit 15 µg/L worst single sample: 16.8 µg/L	33/60	SYR4	2014–2017
Dibromoacetic Acid	1.9865 µg/L No EPA limit set worst single sample: 3.7 µg/L	22/71	SYR4	2012–2019
Lead	0.010 mg/L 66% of the EPA limit 0.0150 mg/L	18/18	LCR	2025
Copper	191.75 µg/L 15% of the EPA limit 1300 µg/L worst single sample: 192 µg/L	6/60	SYR4	2014–2017
Monochloroacetic Acid	2.241 µg/L No EPA limit set worst single sample: 2.26 µg/L	3/71	SYR4	2012–2019

31 contaminants tested, none detected

11Cl-PF3OUdS4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaBromoformHfpo-DaNetfosaaNfdhaNmefosaaPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaLithium

Utility contact

Contact: WOGAN, THOMAS
Phone: 708-597-8603
Email: [email protected]

Frequently asked questions about Blue Island

Is Blue Island tap water safe to drink?

EPA monitoring detected 13 contaminants in Blue Island'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 Blue Island's water?

EPA monitoring detected Bromodichloromethane, Chloroform, Dibromochloromethane, Dichloroacetic Acid, TTHM, and others. The full list with the level and data source for each is above.

How many people does Blue Island serve?

Blue Island reports serving 21,494 people in Illinois, per its EPA record.

Has Blue Island had any water quality violations?

The EPA has 19 violations on file for Blue Island, of which 4 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.