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Tap water quality report

Princeton, IL

EPA monitoring detected 16 contaminants across the 1 water supplier serving Princeton. 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
7,832
people served
16
contaminants found
Illinois rankings Lead in Illinois PFAS in Illinois

What was found in Princeton'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
1099 µg/L 27%
of the EPA limit 4000 µg/L
Main supplier: PRINCETON · 7,832 people · 2017
1/1 SYR4
Nitrate
190 µg/L 1.9%
of the EPA limit 10000 µg/L
Main supplier: PRINCETON · 7,832 people · 2019
1/1 SYR4
Copper
102 µg/L 7.8%
of the EPA limit 1300 µg/L
Main supplier: PRINCETON · 7,832 people · 2019
1/1 SYR4
Nitrate-Nitrite
40 µg/L 0.4%
of the EPA limit 10000 µg/L
Main supplier: PRINCETON · 7,832 people · 2017
1/1 SYR4
Lead
29.4 µg/L 196%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
Main supplier: PRINCETON · 7,832 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
13.975 µg/L 23%
of the EPA limit 60 µg/L
Main supplier: PRINCETON · 7,832 people · 2019
1/1 SYR4
Dichloroacetic Acid
11.515 µg/L
No EPA limit set
Main supplier: PRINCETON · 7,832 people · 2019
1/1 SYR4
TTHM
10.721 µg/L 13%
of the EPA limit 80 µg/L
Main supplier: PRINCETON · 7,832 people · 2019
1/1 SYR4
Chloroform
10.1815 µg/L
No EPA limit set
Main supplier: PRINCETON · 7,832 people · 2019
1/1 SYR4
Arsenic
7.78 µg/L 78%
of the EPA limit 10 µg/L
Main supplier: PRINCETON · 7,832 people · 2017
1/1 SYR4
Barium
7.42 µg/L 0.4%
of the EPA limit 2000 µg/L
Main supplier: PRINCETON · 7,832 people · 2017
1/1 SYR4
Monochloroacetic Acid
2.61 µg/L
No EPA limit set
Main supplier: PRINCETON · 7,832 people · 2019
1/1 SYR4
Trichloroacetic Acid
2.186 µg/L
No EPA limit set
Main supplier: PRINCETON · 7,832 people · 2019
1/1 SYR4
Combined Radium (-226 And -228)
1.434 pCi/L 29%
of the EPA limit 5 pCi/L
Main supplier: PRINCETON · 7,832 people · 2015
1/1 SYR4
Bromodichloromethane
0.5519 µg/L
No EPA limit set
Main supplier: PRINCETON · 7,832 people · 2019
1/1 SYR4
Lead
0.0270 mg/L 180%
above the EPA limit of 0.0150 mg/L
Main supplier: PRINCETON · 7,832 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 Princeton

SupplierPopulation served
PRINCETON 7,832

Frequently asked questions about Princeton tap water

Is Princeton tap water safe to drink?

EPA testing detected 16 contaminants in the water serving Princeton. 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 Princeton?

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

What contaminants are in Princeton's water?

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