Tap WaterIndex

← Illinois

Tap water quality report

Troy, IL

EPA monitoring detected 22 contaminants across the 1 water supplier serving Troy. 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
16,962
people served
22
contaminants found
Illinois rankings Lead in Illinois PFAS in Illinois

What was found in Troy'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
3210 µg/L 32%
of the EPA limit 10000 µg/L
Main supplier: TROY · 16,962 people · 2019
1/1 SYR4
Nitrate-Nitrite
3146.5 µg/L 31%
of the EPA limit 10000 µg/L
Main supplier: TROY · 16,962 people · 2017
1/1 SYR4
Copper
1943.999999999999 µg/L 150%
of the EPA limit, at the 95th percentile of samples — 1300 µg/L
Main supplier: TROY · 16,962 people · 2019
1/1 SYR4
Fluoride
1153 µg/L 29%
of the EPA limit 4000 µg/L
Main supplier: TROY · 16,962 people · 2019
1/1 SYR4
Barium
167.5 µg/L 8.4%
of the EPA limit 2000 µg/L
Main supplier: TROY · 16,962 people · 2019
1/1 SYR4
TTHM
48.059999999999995 µg/L 60%
of the EPA limit 80 µg/L
Main supplier: TROY · 16,962 people · 2019
1/1 SYR4
Dibromochloromethane
21.989999999999995 µg/L
No EPA limit set
Main supplier: TROY · 16,962 people · 2019
1/1 SYR4
Bromodichloromethane
12.529999999999998 µg/L
No EPA limit set
Main supplier: TROY · 16,962 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
11.3 µg/L 19%
of the EPA limit 60 µg/L
Main supplier: TROY · 16,962 people · 2019
1/1 SYR4
Lithium
10.9 µg/L
No EPA limit set
Main supplier: TROY · 16,962 people · 2025
1/1 UCMR-5
Bromoform
10.229999999999999 µg/L
No EPA limit set
Main supplier: TROY · 16,962 people · 2019
1/1 SYR4
Dibromoacetic Acid
6.464999999999999 µg/L
No EPA limit set
Main supplier: TROY · 16,962 people · 2019
1/1 SYR4
Chloroform
5.464999999999999 µg/L
No EPA limit set
Main supplier: TROY · 16,962 people · 2019
1/1 SYR4
Selenium
4.91 µg/L 9.8%
of the EPA limit 50 µg/L
Main supplier: TROY · 16,962 people · 2019
1/1 SYR4
Monobromoacetic Acid
3.8775 µg/L
No EPA limit set
Main supplier: TROY · 16,962 people · 2019
1/1 SYR4
Lead
3.4 µg/L 23%
of the EPA limit 15 µg/L
Main supplier: TROY · 16,962 people · 2019
1/1 SYR4
Dichloroacetic Acid
3.3 µg/L
No EPA limit set
Main supplier: TROY · 16,962 people · 2019
1/1 SYR4
Di(2-ethylhexyl) Phthalate
2.62 µg/L 44%
of the EPA limit 6 µg/L
Main supplier: TROY · 16,962 people · 2019
1/1 SYR4
Monochloroacetic Acid
2.1 µg/L
No EPA limit set
Main supplier: TROY · 16,962 people · 2019
1/1 SYR4
Trichloroacetic Acid
1.8 µg/L
No EPA limit set
Main supplier: TROY · 16,962 people · 2019
1/1 SYR4
PFBS
0.0039 µg/L
No EPA limit set
Main supplier: TROY · 16,962 people · 2025
1/1 UCMR-5
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: TROY · 16,962 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 Troy

SupplierPopulation served
TROY 16,962

Frequently asked questions about Troy tap water

Is Troy tap water safe to drink?

EPA testing detected 22 contaminants in the water serving Troy. 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 Troy?

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

What contaminants are in Troy's water?

The contaminants EPA monitoring detected in Troy 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.