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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
76–100 of 345Barkley Lake Water District
KY1110019 · 14,284 served
Butler County Water System Inc
KY0160052 · 14,256 served
Paris Water Works
KY0090343 · 14,139 served
Jackson Co Water Association
KY0550209 · 13,629 served
North Nelson Water District
KY0900323 · 13,365 served
Springfield Water Works
KY1150415 · 13,205 served
Big Sandy Water District
KY0100944 · 13,044 served
Western Rockcastle Water Assoc
KY1020891 · 12,623 served
Eubank Water System
KY1000124 · 12,492 served
East Casey Co Water District
KY0230556 · 12,460 served
Mayfield Electric & Water
KY0420274 · 12,379 served
Greenup Water System
KY0450169 · 12,193 served
Water Service Corporation of Kentucky
KY0070282 · 12,022 served
E Daviess Co Water Assoc Inc
KY0300109 · 11,997 served
Rattlesnake Ridge Water District
KY0220555 · 11,397 served
Manchester Water Works
KY0260737 · 11,349 served
Maysville Utility Commission
KY0810275 · 11,263 served
Grayson Utility Commission
KY0220164 · 10,950 served
Bath County Water District
KY0060022 · 10,083 served
Lagrange Utilities Commission
KY0930481 · 10,067 served
Berea Municipal Utilities
KY0760030 · 9,972 served
Whitley Co Water District
KY1180468 · 9,825 served
Todd County Water District
KY1100944 · 9,801 served
North Mercer Water District
KY0840321 · 9,775 served
Fleming Co Water Association
KY0350133 · 9,693 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