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Kentucky Water Quality
345
Utilities in database
5.0M
Residents served
32%
On private wells
2
Key contaminants tracked
Drinking Water in Kentucky
Kentucky has 345 community water systems serving approximately 5.0 million residents. Primary water sources include surface water. The most commonly reported contaminants include disinfection byproducts, nitrates. 32% of Kentucky residents rely on private wells. DWR holds primary enforcement authority under the Safe Drinking Water Act.
Utilities in Kentucky
1–25 of 345Louisville Water Company
KY0560258 · 764,769 served
Kentucky-american Water Co
KY0340250 · 669,042 served
Northern Kentucky Water District
KY0590220 · 259,949 served
Warren County Water District
KY1140487 · 91,118 served
Hardin County Water District #2
KY0470175 · 76,326 served
Boone Co Water & Sewer District
KY0080034 · 66,300 served
Paducah Water Works
KY0730533 · 65,004 served
Owensboro Municipal Utilities
KY0300336 · 60,473 served
Bowling Green Municipal Utilities
KY1140038 · 53,601 served
Frankfort Plant Board
KY0370143 · 52,153 served
Georgetown Municipal Water Service
KY1050157 · 44,608 served
Ashland Water Works
KY0100011 · 44,402 served
Mountain Water Dist
KY0980575 · 44,057 served
Hopkinsville Water Environment Authority
KY0240201 · 41,350 served
Oldham County Water District
KY0930333 · 38,409 served
Glasgow Water Company
KY0050929 · 36,766 served
Richmond Utilities
KY0760370 · 35,640 served
Nicholasville Water Department
KY0570315 · 35,266 served
Mccreary County Water District
KY0740276 · 34,439 served
Daviess Co Water District
KY0300387 · 33,655 served
Meade County Water District
KY0820369 · 33,313 served
Danville City Water Works
KY0110097 · 32,600 served
Henderson Water Utility/north
KY0510188 · 31,705 served
Franklin Water Works
KY1070144 · 31,602 served
Bardstown Municipal Water Dept
KY0900017 · 31,185 served
Key Contaminant Concerns in Kentucky
Nitrates
Nitrate (NO₃⁻) is a nitrogen-containing compound that forms naturally through the decomposition of organic matter. At elevated concentrations — almost always from human activity — nitrate interferes with the blood's ability to carry oxygen. The United States produces over 23 million tons of nitrogen fertilizer annually, making agricultural runoff the dominant source of nitrate contamination.
DBPs
When utilities add chlorine to water to kill pathogens, it reacts with dissolved organic matter — leaves, algae, soil — to produce disinfection byproducts (DBPs). Over 600 DBPs have been identified. The EPA regulates two groups: total trihalomethanes (TTHMs, including chloroform) and haloacetic acids (HAA5). DBP levels tend to be highest in surface water systems and in warm months when organic matter is elevated.
Kentucky Water FAQs
Quick Links
Data source: Utility data from EPA SDWIS. 345 active community water systems ingested. CCR contaminant data ingestion in progress.
Last updated: 2026-04-22