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Tap water quality report

Riverdale, IL

EPA monitoring detected 13 contaminants across the 1 water supplier serving Riverdale. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

1
water supplier
10,266
people served
13
contaminants found
Illinois rankings Lead in Illinois PFAS in Illinois

What was found in Riverdale's water

The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Copper
130 µg/L 10%
of the EPA limit 1300 µg/L
Main supplier: RIVERDALE · 10,266 people · 2017
1/1 SYR4
TTHM
44.2 µg/L 55%
of the EPA limit 80 µg/L
Main supplier: RIVERDALE · 10,266 people · 2019
1/1 SYR4
Chloroform
25.5 µg/L
No EPA limit set
Main supplier: RIVERDALE · 10,266 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
24.85 µg/L 41%
of the EPA limit 60 µg/L
Main supplier: RIVERDALE · 10,266 people · 2019
1/1 SYR4
Lead
13.46 µg/L 90%
of the EPA limit 15 µg/L
Main supplier: RIVERDALE · 10,266 people · 2017
1/1 SYR4
Dichloroacetic Acid
12.5 µg/L
No EPA limit set
Main supplier: RIVERDALE · 10,266 people · 2019
1/1 SYR4
Bromodichloromethane
12.1 µg/L
No EPA limit set
Main supplier: RIVERDALE · 10,266 people · 2019
1/1 SYR4
Trichloroacetic Acid
10.95 µg/L
No EPA limit set
Main supplier: RIVERDALE · 10,266 people · 2019
1/1 SYR4
Dibromochloromethane
6.61 µg/L
No EPA limit set
Main supplier: RIVERDALE · 10,266 people · 2019
1/1 SYR4
Monochloroacetic Acid
5.244 µg/L
No EPA limit set
Main supplier: RIVERDALE · 10,266 people · 2019
1/1 SYR4
Monobromoacetic Acid
2.032 µg/L
No EPA limit set
Main supplier: RIVERDALE · 10,266 people · 2019
1/1 SYR4
Dibromoacetic Acid
2.022 µg/L
No EPA limit set
Main supplier: RIVERDALE · 10,266 people · 2019
1/1 SYR4
Lead
0.0048 mg/L 32%
of the EPA limit 0.0150 mg/L
Main supplier: RIVERDALE · 10,266 people · 2026
1/1 LCR
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 the system's samples — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving Riverdale

SupplierPopulation served
RIVERDALE 10,266

Frequently asked questions about Riverdale tap water

Is Riverdale tap water safe to drink?

EPA testing detected 13 contaminants in the water serving Riverdale. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.

How many water suppliers serve Riverdale?

1 public water supplier report drinking-water monitoring for Riverdale, Illinois to the EPA. Each is listed above with its population served.

What contaminants are in Riverdale's water?

The contaminants EPA monitoring detected in Riverdale include Copper, TTHM, Chloroform, Total Haloacetic Acids (HAA5), Lead. The full list, with the level at the main supplier and the data source, is in the table above.

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.