Is Leyden Twsp Water District 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
MCL	Health-based	Resolved	2007-05-01 → 2007-05-31
MCL	Health-based	Resolved	2007-05-01 → 2007-05-31
MCL	Health-based	Resolved	2007-05-01 → 2007-05-31
MCL	Health-based	Resolved	2007-05-01 → 2007-05-31
MCL	Health-based	Resolved	2007-05-01 → 2007-05-31
MCL	Health-based	Archived	2003-01-01 → 2003-01-31
MCL	Health-based	Archived	2003-01-01 → 2003-01-31
MCL	Health-based	Archived	2001-06-01 → 2001-06-30
MCL	Health-based	Archived	2001-06-01 → 2001-06-30
Other	Monitoring	Resolved	2021-07-01

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	13.225 µg/L No EPA limit set worst single sample: 16.7 µg/L	72/72	SYR4	2012–2019
Chloroform	25.215 µg/L No EPA limit set worst single sample: 30.6 µg/L	72/72	SYR4	2012–2019
TTHM	44.255 µg/L 55% of the EPA limit 80 µg/L worst single sample: 53.8 µg/L	72/72	SYR4	2012–2019
Dibromochloromethane	6.65 µg/L No EPA limit set worst single sample: 7.4 µg/L	71/72	SYR4	2012–2019
Dichloroacetic Acid	9.35 µg/L No EPA limit set worst single sample: 13 µg/L	71/71	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	17.05 µg/L 28% of the EPA limit 60 µg/L worst single sample: 19.8 µg/L	71/71	SYR4	2012–2019
Trichloroacetic Acid	8 µg/L No EPA limit set worst single sample: 9.2 µg/L	71/71	SYR4	2012–2019
Dibromoacetic Acid	1.64 µg/L No EPA limit set worst single sample: 1.9 µg/L	37/71	SYR4	2012–2019
Lead	0.0107 mg/L 71% of the EPA limit 0.0150 mg/L	23/23	LCR	2026
Lead	20.77 µg/L 138% of the EPA limit, at the 95th percentile of samples — 15 µg/L worst single sample: 36.1 µg/L	15/60	SYR4	2014–2017
Copper	442.1 µg/L 34% of the EPA limit 1300 µg/L worst single sample: 470 µg/L	4/60	SYR4	2014–2017
Bromoform	1.3 µg/L No EPA limit set	1/72	SYR4	2012–2019

32 contaminants tested, none detected

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Utility contact

Contact: LOSURDO, MIKE
Phone: 847-455-8616
Email: [email protected]

Frequently asked questions about Leyden Twsp Water District

Is Leyden Twsp Water District tap water safe to drink?

EPA monitoring detected 12 contaminants in Leyden Twsp Water District'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 Leyden Twsp Water District's water?

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

How many people does Leyden Twsp Water District serve?

Leyden Twsp Water District reports serving 10,000 people in Illinois, per its EPA record.

Has Leyden Twsp Water District had any water quality violations?

The EPA has 40 violations on file for Leyden Twsp Water District, of which 9 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.