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Tap water quality report

Horse Cave, KY

EPA monitoring detected 14 contaminants across the 2 water suppliers serving Horse Cave. 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
20,175
people served
14
contaminants found
Kentucky rankings Lead in Kentucky PFAS in Kentucky

What was found in Horse Cave'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
1920 µg/L 19%
of the EPA limit 10000 µg/L
Main supplier: GREEN RIVER VALLEY WATER DISTRICT · 17,431 people · 2019
1/2 SYR4
Fluoride
1100 µg/L 28%
of the EPA limit 4000 µg/L
Main supplier: GREEN RIVER VALLEY WATER DISTRICT · 17,431 people · 2019
1/2 SYR4
Copper
153.95 µg/L 12%
of the EPA limit 1300 µg/L
Main supplier: GREEN RIVER VALLEY WATER DISTRICT · 17,431 people · 2019
1/2 SYR4
TTHM
68 µg/L 85%
of the EPA limit 80 µg/L
Main supplier: GREEN RIVER VALLEY WATER DISTRICT · 17,431 people · 2019
2/2 SYR4
Cyanide
58.5 µg/L 29%
of the EPA limit 200 µg/L
Main supplier: GREEN RIVER VALLEY WATER DISTRICT · 17,431 people · 2019
1/2 SYR4
Total Haloacetic Acids (HAA5)
52 µg/L 87%
of the EPA limit 60 µg/L
Main supplier: GREEN RIVER VALLEY WATER DISTRICT · 17,431 people · 2019
2/2 SYR4
Barium
39.949999999999996 µg/L 2%
of the EPA limit 2000 µg/L
Main supplier: GREEN RIVER VALLEY WATER DISTRICT · 17,431 people · 2019
1/2 SYR4
Lead
7.3999999999999915 µg/L 49%
of the EPA limit 15 µg/L
Main supplier: GREEN RIVER VALLEY WATER DISTRICT · 17,431 people · 2019
1/2 SYR4
Combined Radium (-226 And -228)
3 pCi/L 60%
of the EPA limit 5 pCi/L
Main supplier: GREEN RIVER VALLEY WATER DISTRICT · 17,431 people · 2014
1/2 SYR4
Chromium
1 µg/L 1%
of the EPA limit 100 µg/L
Main supplier: GREEN RIVER VALLEY WATER DISTRICT · 17,431 people · 2019
1/2 SYR4
Mercury
0.6000 µg/L 30%
of the EPA limit 2 µg/L
Main supplier: GREEN RIVER VALLEY WATER DISTRICT · 17,431 people · 2019
1/2 SYR4
Arsenic
0.4900 µg/L 4.9%
of the EPA limit 10 µg/L
Main supplier: GREEN RIVER VALLEY WATER DISTRICT · 17,431 people · 2019
1/2 SYR4
Di(2-ethylhexyl) Adipate
0.3000 µg/L 0.1%
of the EPA limit 400 µg/L
Main supplier: GREEN RIVER VALLEY WATER DISTRICT · 17,431 people · 2018
1/2 SYR4
Lead
0.0030 mg/L 20%
of the EPA limit 0.0150 mg/L
Main supplier: GREEN RIVER VALLEY WATER DISTRICT · 17,431 people · 2025
Highest in the city: 0.0041 mg/L — HORSE CAVE WATER SYSTEM · 2,744 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 Horse Cave

SupplierPopulation served
GREEN RIVER VALLEY WATER DISTRICT 17,431
HORSE CAVE WATER SYSTEM 2,744

Frequently asked questions about Horse Cave tap water

Is Horse Cave tap water safe to drink?

EPA testing detected 14 contaminants in the water serving Horse Cave. 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 Horse Cave?

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

What contaminants are in Horse Cave's water?

The contaminants EPA monitoring detected in Horse Cave include Nitrate, Fluoride, Copper, TTHM, Cyanide. 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.