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Tap water quality report

Nashville, IL

EPA monitoring detected 21 contaminants across the 2 water suppliers serving Nashville. 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.

2
water suppliers
14,604
people served
21
contaminants found
Illinois rankings Lead in Illinois PFAS in Illinois

What was found in Nashville'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
2400 µg/L 24%
of the EPA limit 10000 µg/L
Highest in the city: NASHVILLE · 3,230 people · 2019
1/2 SYR4
Nitrate-Nitrite
2375.5 µg/L 24%
of the EPA limit 10000 µg/L
Highest in the city: NASHVILLE · 3,230 people · 2019
1/2 SYR4
Copper
1189 µg/L 91%
of the EPA limit 1300 µg/L
Main supplier: WASHINGTON COUNTY WATER COMPANY · 11,374 people · 2017
2/2 SYR4
Fluoride
1090 µg/L 27%
of the EPA limit 4000 µg/L
Highest in the city: NASHVILLE · 3,230 people · 2019
1/2 SYR4
TTHM
80.825 µg/L 101%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
Main supplier: WASHINGTON COUNTY WATER COMPANY · 11,374 people · 2019
2/2 SYR4
Chloroform
58.035 µg/L
No EPA limit set
Main supplier: WASHINGTON COUNTY WATER COMPANY · 11,374 people · 2019
2/2 SYR4
Total Haloacetic Acids (HAA5)
39.35 µg/L 66%
of the EPA limit 60 µg/L
Main supplier: WASHINGTON COUNTY WATER COMPANY · 11,374 people · 2019
2/2 SYR4
Dichloroacetic Acid
29.15 µg/L
No EPA limit set
Main supplier: WASHINGTON COUNTY WATER COMPANY · 11,374 people · 2019
2/2 SYR4
Trichloroacetic Acid
16.87 µg/L
No EPA limit set
Main supplier: WASHINGTON COUNTY WATER COMPANY · 11,374 people · 2019
2/2 SYR4
Bromodichloromethane
16.67 µg/L
No EPA limit set
Main supplier: WASHINGTON COUNTY WATER COMPANY · 11,374 people · 2019
2/2 SYR4
Dibromochloromethane
6.1 µg/L
No EPA limit set
Main supplier: WASHINGTON COUNTY WATER COMPANY · 11,374 people · 2019
2/2 SYR4
Monochloroacetic Acid
4.96 µg/L
No EPA limit set
Main supplier: WASHINGTON COUNTY WATER COMPANY · 11,374 people · 2019
2/2 SYR4
Monobromoacetic Acid
4.73 µg/L
No EPA limit set
Main supplier: WASHINGTON COUNTY WATER COMPANY · 11,374 people · 2019
2/2 SYR4
Lead
4 µg/L 27%
of the EPA limit 15 µg/L
Main supplier: WASHINGTON COUNTY WATER COMPANY · 11,374 people · 2017
2/2 SYR4
2,4-D
2.9 µg/L 4.1%
of the EPA limit 70 µg/L
Highest in the city: NASHVILLE · 3,230 people · 2019
1/2 SYR4
Dibromoacetic Acid
2.1 µg/L
No EPA limit set
Main supplier: WASHINGTON COUNTY WATER COMPANY · 11,374 people · 2019
1/2 SYR4
Bromoform
1.6 µg/L
No EPA limit set
Main supplier: WASHINGTON COUNTY WATER COMPANY · 11,374 people · 2019
1/2 SYR4
Atrazine
1.38 µg/L 46%
of the EPA limit 3 µg/L
Highest in the city: NASHVILLE · 3,230 people · 2019
1/2 SYR4
Combined Radium (-226 And -228)
0.2600 pCi/L 5.2%
of the EPA limit 5 pCi/L
Highest in the city: NASHVILLE · 3,230 people · 2017
1/2 SYR4
Pfba
0.0082 µg/L
No EPA limit set
Main supplier: WASHINGTON COUNTY WATER COMPANY · 11,374 people · 2025
1/2 UCMR-5
Lead
0.0020 mg/L 13%
of the EPA limit 0.0150 mg/L
Main supplier: WASHINGTON COUNTY WATER COMPANY · 11,374 people · 2023
2/2 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 Nashville

SupplierPopulation served
WASHINGTON COUNTY WATER COMPANY 11,374
NASHVILLE 3,230

Frequently asked questions about Nashville tap water

Is Nashville tap water safe to drink?

EPA testing detected 21 contaminants in the water serving Nashville. 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 Nashville?

2 public water suppliers report drinking-water monitoring for Nashville, Illinois to the EPA. Each is listed above with its population served.

What contaminants are in Nashville's water?

The contaminants EPA monitoring detected in Nashville include Nitrate, Nitrate-Nitrite, Copper, Fluoride, TTHM. 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.