Tap WaterIndex

← Illinois

Tap water quality report

Northwest Water Commission

EPA monitoring tested this supplier for 11 contaminants and detected 9. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

11
contaminants tested
9
detected
1
people served
0
health-based violations
Illinois rankingsLead in IllinoisPFAS in Illinois
Water source
SWP
Ownership
Local government
Counties served
Cook

Compliance record

No violations on file. The EPA has no formal drinking-water violations recorded for this supplier.

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.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Bromodichloromethane
10.98 µg/L
No EPA limit set
worst single sample: 11.4 µg/L
15/15 SYR4 2012–2019
Chloroform
18.57 µg/L
No EPA limit set
worst single sample: 19.9 µg/L
15/15 SYR4 2012–2019
Dibromochloromethane
5.263 µg/L
No EPA limit set
worst single sample: 5.27 µg/L
15/15 SYR4 2012–2019
Dichloroacetic Acid
13.89 µg/L
No EPA limit set
worst single sample: 14.8 µg/L
15/15 SYR4 2012–2019
TTHM
34.44 µg/L 43%
of the EPA limit 80 µg/L
worst single sample: 36.4 µg/L
15/15 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
23.24 µg/L 39%
of the EPA limit 60 µg/L
worst single sample: 25.9 µg/L
15/15 SYR4 2012–2019
Trichloroacetic Acid
7.741 µg/L
No EPA limit set
worst single sample: 8.91 µg/L
15/15 SYR4 2012–2019
Monobromoacetic Acid
1.694 µg/L
No EPA limit set
worst single sample: 1.81 µg/L
9/15 SYR4 2012–2019
Dibromoacetic Acid
1.758 µg/L
No EPA limit set
worst single sample: 1.8 µg/L
8/15 SYR4 2012–2019
2 contaminants tested, none detected
BromoformMonochloroacetic Acid

Utility contact

Contact
MURPHY, BRIAN P
Phone
616-690-8585
Email
[email protected]

Frequently asked questions about Northwest Water Commission

Is Northwest Water Commission tap water safe to drink?

EPA monitoring detected 9 contaminants in Northwest Water Commission'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 Northwest Water Commission'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 Northwest Water Commission serve?

Northwest Water Commission reports serving 1 people in Illinois, per its EPA record.

Has Northwest Water Commission had any water quality violations?

The EPA has no formal drinking-water violations on file for Northwest Water Commission.

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.