Is Marion Tap Water Safe? Quality Report

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

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

122

violations on file

still open

Violation	Type	Status	Period
TT	Health-based	Resolved	2002-06-01 → 2002-06-30
TT	Health-based	Resolved	2002-06-01 → 2002-06-30
TT	Health-based	Resolved	2002-06-01 → 2002-06-30
MCL	Health-based	Archived	1997-04-01 → 1997-04-30
MCL	Health-based	Archived	1997-04-01 → 1997-04-30
MCL	Health-based	Resolved	1985-07-01 → 1986-06-30
MCL	Health-based	Resolved	1985-07-01 → 1986-06-30
MCL	Health-based	Resolved	1985-07-01 → 1986-06-30
MCL	Health-based	Resolved	1985-07-01 → 1986-06-30
MCL	Health-based	Resolved	1985-07-01 → 1986-06-30

PFAS detected

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

Contaminant	Max	Detection rate	Period
Pfba	0.0056 µg/L	2/4	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 single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Copper	89 µg/L 6.8% of the EPA limit 1300 µg/L	134/150	SYR4	2012–2017
Bromodichloromethane	11 µg/L No EPA limit set	128/128	SYR4	2012–2019
Chloroform	54 µg/L No EPA limit set	128/128	SYR4	2012–2019
TTHM	62 µg/L 78% of the EPA limit 80 µg/L	128/128	SYR4	2012–2019
Dibromochloromethane	4.9 µg/L No EPA limit set	124/128	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	53.7 µg/L 90% of the EPA limit 60 µg/L	124/128	SYR4	2012–2019
Dichloroacetic Acid	28.2 µg/L No EPA limit set	123/128	SYR4	2012–2019
Trichloroacetic Acid	6.6 µg/L No EPA limit set	111/128	SYR4	2012–2019
Dibromoacetic Acid	2.59 µg/L No EPA limit set	41/128	SYR4	2012–2019
Monobromoacetic Acid	33.1 µg/L No EPA limit set	30/128	SYR4	2012–2019
Lead	11 µg/L 73% of the EPA limit 15 µg/L	27/150	SYR4	2012–2017
Monochloroacetic Acid	4.4 µg/L No EPA limit set	21/128	SYR4	2012–2019
Lead	0.0012 mg/L 8% of the EPA limit 0.0150 mg/L	19/19	LCR	2027
Bromoform	2.32 µg/L No EPA limit set	10/128	SYR4	2012–2019

29 contaminants tested, none detected

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Utility contact

Contact: CLARIDA, H. GLENN
Phone: 618-997-6281
Email: gclarida@cityofmarionil.gov

Frequently asked questions about Marion

Is Marion tap water safe to drink?

EPA monitoring detected 15 contaminants in Marion'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 Marion's water?

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

How many people does Marion serve?

Marion reports serving 16,855 people in Illinois, per its EPA record.

Has Marion had any water quality violations?

The EPA has 122 violations on file for Marion, of which 28 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.