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Tap water quality report

Princeton, KY

EPA monitoring detected 15 contaminants across the 2 water suppliers 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.

2
water suppliers
13,007
people served
15
contaminants found
Kentucky rankings Lead in Kentucky PFAS in Kentucky

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
Nitrate
1500 µg/L 15%
of the EPA limit 10000 µg/L
Main supplier: PRINCETON WATER & SEWER COMMISSION · 7,007 people · 2019
1/2 SYR4
Fluoride
1125 µg/L 28%
of the EPA limit 4000 µg/L
Main supplier: PRINCETON WATER & SEWER COMMISSION · 7,007 people · 2019
1/2 SYR4
Chlorite
696.5 µg/L 70%
of the EPA limit 1000 µg/L
Main supplier: PRINCETON WATER & SEWER COMMISSION · 7,007 people · 2019
1/2 SYR4
Copper
157 µg/L 12%
of the EPA limit 1300 µg/L
Main supplier: PRINCETON WATER & SEWER COMMISSION · 7,007 people · 2019
Highest in the city: 304.29999999999995 µg/L — CALDWELL COUNTY WATER DISTRICT · 6,000 people · 2017
2/2 SYR4
TTHM
85 µg/L 106%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
Main supplier: PRINCETON WATER & SEWER COMMISSION · 7,007 people · 2019
Highest in the city: 101.29999999999998 µg/L — CALDWELL COUNTY WATER DISTRICT · 6,000 people · 2019
2/2 SYR4
Total Haloacetic Acids (HAA5)
79.84999999999997 µg/L 133%
of the EPA limit, at the 95th percentile of samples — 60 µg/L
Main supplier: PRINCETON WATER & SEWER COMMISSION · 7,007 people · 2019
2/2 SYR4
Barium
25.099999999999998 µg/L 1.3%
of the EPA limit 2000 µg/L
Main supplier: PRINCETON WATER & SEWER COMMISSION · 7,007 people · 2019
1/2 SYR4
Lead
2.07 µg/L 14%
of the EPA limit 15 µg/L
Main supplier: PRINCETON WATER & SEWER COMMISSION · 7,007 people · 2019
Highest in the city: 4 µg/L — CALDWELL COUNTY WATER DISTRICT · 6,000 people · 2017
2/2 SYR4
Combined Radium (-226 And -228)
0.5450 pCi/L 11%
of the EPA limit 5 pCi/L
Main supplier: PRINCETON WATER & SEWER COMMISSION · 7,007 people · 2019
1/2 SYR4
Chromium
0.3000 µg/L 0.3%
of the EPA limit 100 µg/L
Main supplier: PRINCETON WATER & SEWER COMMISSION · 7,007 people · 2019
1/2 SYR4
Arsenic
0.2000 µg/L 2%
of the EPA limit 10 µg/L
Main supplier: PRINCETON WATER & SEWER COMMISSION · 7,007 people · 2019
1/2 SYR4
Pfba
0.0306 µg/L
No EPA limit set
Highest in the city: CALDWELL COUNTY WATER DISTRICT · 6,000 people · 2023
1/2 UCMR-5
Benzo(A)Pyrene
0.0300 µg/L 15%
of the EPA limit 0.2000 µg/L
Main supplier: PRINCETON WATER & SEWER COMMISSION · 7,007 people · 2017
1/2 SYR4
Pfpea
0.0038 µg/L
No EPA limit set
Highest in the city: CALDWELL COUNTY WATER DISTRICT · 6,000 people · 2023
1/2 UCMR-5
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: PRINCETON WATER & SEWER COMMISSION · 7,007 people · 2025
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 Princeton

SupplierPopulation served
PRINCETON WATER & SEWER COMMISSION 7,007
CALDWELL COUNTY WATER DISTRICT 6,000

Frequently asked questions about Princeton tap water

Is Princeton tap water safe to drink?

EPA testing detected 15 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?

2 public water suppliers report drinking-water monitoring for Princeton, Kentucky 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 Nitrate, Fluoride, Chlorite, Copper, 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.