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Tap water quality report

Algonquin, IL

EPA monitoring detected 20 contaminants across the 1 water supplier serving Algonquin. 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
30,700
people served
20
contaminants found
Illinois rankings Lead in Illinois PFAS in Illinois

What was found in Algonquin'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
Nitrate
2000 µg/L 20%
of the EPA limit 10000 µg/L
Main supplier: ALGONQUIN · 30,700 people · 2019
1/1 SYR4
Nitrate-Nitrite
2000 µg/L 20%
of the EPA limit 10000 µg/L
Main supplier: ALGONQUIN · 30,700 people · 2018
1/1 SYR4
Copper
1377.5 µg/L 106%
of the EPA limit, at the 95th percentile of samples — 1300 µg/L
Main supplier: ALGONQUIN · 30,700 people · 2018
1/1 SYR4
Fluoride
1005.6 µg/L 25%
of the EPA limit 4000 µg/L
Main supplier: ALGONQUIN · 30,700 people · 2018
1/1 SYR4
Barium
456 µg/L 23%
of the EPA limit 2000 µg/L
Main supplier: ALGONQUIN · 30,700 people · 2018
1/1 SYR4
TTHM
71.17 µg/L 89%
of the EPA limit 80 µg/L
Main supplier: ALGONQUIN · 30,700 people · 2019
1/1 SYR4
Chloroform
39.675 µg/L
No EPA limit set
Main supplier: ALGONQUIN · 30,700 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
37.87 µg/L 63%
of the EPA limit 60 µg/L
Main supplier: ALGONQUIN · 30,700 people · 2019
1/1 SYR4
Bromodichloromethane
21.8 µg/L
No EPA limit set
Main supplier: ALGONQUIN · 30,700 people · 2019
1/1 SYR4
Dichloroacetic Acid
18.5 µg/L
No EPA limit set
Main supplier: ALGONQUIN · 30,700 people · 2019
1/1 SYR4
Trichloroacetic Acid
17.7 µg/L
No EPA limit set
Main supplier: ALGONQUIN · 30,700 people · 2019
1/1 SYR4
Lead
12.86 µg/L 86%
of the EPA limit 15 µg/L
Main supplier: ALGONQUIN · 30,700 people · 2018
1/1 SYR4
Dibromochloromethane
11.705 µg/L
No EPA limit set
Main supplier: ALGONQUIN · 30,700 people · 2019
1/1 SYR4
Monobromoacetic Acid
6.402 µg/L
No EPA limit set
Main supplier: ALGONQUIN · 30,700 people · 2019
1/1 SYR4
Combined Radium (-226 And -228)
3.645 pCi/L 73%
of the EPA limit 5 pCi/L
Main supplier: ALGONQUIN · 30,700 people · 2019
1/1 SYR4
Dibromoacetic Acid
3.191 µg/L
No EPA limit set
Main supplier: ALGONQUIN · 30,700 people · 2019
1/1 SYR4
Bromoform
2.636 µg/L
No EPA limit set
Main supplier: ALGONQUIN · 30,700 people · 2019
1/1 SYR4
Monochloroacetic Acid
2.348 µg/L
No EPA limit set
Main supplier: ALGONQUIN · 30,700 people · 2019
1/1 SYR4
Arsenic
1.1 µg/L 11%
of the EPA limit 10 µg/L
Main supplier: ALGONQUIN · 30,700 people · 2018
1/1 SYR4
Lead
0.0023 mg/L 15%
of the EPA limit 0.0150 mg/L
Main supplier: ALGONQUIN · 30,700 people · 2025
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 Algonquin

SupplierPopulation served
ALGONQUIN 30,700

Frequently asked questions about Algonquin tap water

Is Algonquin tap water safe to drink?

EPA testing detected 20 contaminants in the water serving Algonquin. 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 Algonquin?

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

What contaminants are in Algonquin's water?

The contaminants EPA monitoring detected in Algonquin include Nitrate, Nitrate-Nitrite, Copper, Fluoride, Barium. 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.