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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
26–50 of 345Hardin County Water District #1
KY0470393 · 30,230 served
Winchester Municipal Utilities
KY0250473 · 29,823 served
Somerset Water Service
KY1000403 · 29,700 served
Florence Water & Sewer
KY0080135 · 29,351 served
Madisonville Light & Water
KY0540936 · 28,102 served
Prestonsburg City Utilities
KY0360358 · 26,788 served
Hazard Water Department
KY0970184 · 26,730 served
Murray Water System
KY0180306 · 26,302 served
Madison Co Utilities District
KY0760224 · 25,120 served
Campbellsville Municipal Water
KY1090060 · 24,874 served
Paintsville Municipal Water Works
KY0580340 · 24,354 served
Mt Washington Water Company
KY0150300 · 23,760 served
Shelbyville Water & Sewer Commission
KY1060394 · 23,760 served
Hardin Co. Water Dist #1/ft. Knox
KY0470990 · 23,600 served
Western Pulaski Co Water District
KY1000363 · 23,264 served
Taylorsville Water Works
KY1080425 · 22,286 served
Columbia/adair Utilities District
KY0011016 · 22,113 served
Fort Campbell
KY0241001 · 22,000 served
Southeastern Water Assoc/nelson Valley
KY1000311 · 21,895 served
Monticello Water & Sewer Commission
KY1160291 · 21,000 served
Bullock Pen Water District
KY0410047 · 20,048 served
Grayson County Water District
KY0430616 · 20,033 served
Rowan Water Inc
KY1030375 · 18,765 served
Hardinsburg Ro Wtp
KY0140966 · 18,437 served
Edmonson Co Water District
KY0310114 · 17,848 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
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Data source: Utility data from EPA SDWIS. 345 active community water systems ingested. CCR contaminant data ingestion in progress.
Last updated: 2026-04-22