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Tap water quality report

Granville, IL

EPA monitoring detected 10 contaminants across the 1 water supplier serving Granville. 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
1,359
people served
10
contaminants found
Illinois rankings Lead in Illinois PFAS in Illinois

What was found in Granville'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
Fluoride
1217 µg/L 30%
of the EPA limit 4000 µg/L
Main supplier: GRANVILLE · 1,359 people · 2017
1/1 SYR4
Copper
610.4 µg/L 47%
of the EPA limit 1300 µg/L
Main supplier: GRANVILLE · 1,359 people · 2019
1/1 SYR4
Gross Alpha, Excl. Radon And U
15.9 pCi/L 106%
of the EPA limit, at the 95th percentile of samples — 15 pCi/L
Main supplier: GRANVILLE · 1,359 people · 2019
1/1 SYR4
Lead
13.115 µg/L 87%
of the EPA limit 15 µg/L
Main supplier: GRANVILLE · 1,359 people · 2019
1/1 SYR4
Nitrite
11 µg/L 1.1%
of the EPA limit 1000 µg/L
Main supplier: GRANVILLE · 1,359 people · 2019
1/1 SYR4
Barium
9.184 µg/L 0.5%
of the EPA limit 2000 µg/L
Main supplier: GRANVILLE · 1,359 people · 2017
1/1 SYR4
Cadmium
5.3 µg/L 106%
of the EPA limit, at the 95th percentile of samples — 5 µg/L
Main supplier: GRANVILLE · 1,359 people · 2017
1/1 SYR4
Combined Radium (-226 And -228)
3.76 pCi/L 75%
of the EPA limit 5 pCi/L
Main supplier: GRANVILLE · 1,359 people · 2019
1/1 SYR4
Combined Uranium
0.1028 µg/L 0.3%
of the EPA limit 30 µg/L
Main supplier: GRANVILLE · 1,359 people · 2019
1/1 SYR4
Lead
0.0077 mg/L 51%
of the EPA limit 0.0150 mg/L
Main supplier: GRANVILLE · 1,359 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 Granville

SupplierPopulation served
GRANVILLE 1,359

Frequently asked questions about Granville tap water

Is Granville tap water safe to drink?

EPA testing detected 10 contaminants in the water serving Granville. 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 Granville?

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

What contaminants are in Granville's water?

The contaminants EPA monitoring detected in Granville include Fluoride, Copper, Gross Alpha, Excl. Radon And U, Lead, Nitrite. 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.