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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
51–75 of 345Versailles Water System
KY1200439 · 17,822 served
Henry County Water District #2
KY0520192 · 17,716 served
Henderson County Water District
KY0510189 · 17,447 served
Green River Valley Water District
KY0500166 · 17,431 served
Christian Co Water District
KY0240521 · 17,248 served
Laurel Co Water District #2
KY0630238 · 16,899 served
Muhlenberg Co Water District
KY0890302 · 16,845 served
Harrison Co Water Assoc
KY0490179 · 16,736 served
Pineville Water System
KY0070353 · 16,573 served
Ohio County Water District
KY0920332 · 16,511 served
Barbourville Utilities
KY0610016 · 16,420 served
Allen County Water District
KY0020956 · 16,398 served
Mt Sterling Water Works
KY0870298 · 16,391 served
Marion County Water District
KY0780268 · 16,311 served
North Marshall Water District #1
KY0790319 · 16,276 served
Corbin Utilities Commission
KY1180085 · 16,065 served
East Laurel Water District
KY0630797 · 16,062 served
Green Taylor Water District
KY0440167 · 15,497 served
Southern Water & Sewer District
KY0360026 · 15,110 served
Wood Creek Water District
KY0630477 · 14,892 served
West Laurel Water Assoc Inc
KY0630451 · 14,878 served
Garrard Co Water Assoc Inc
KY0400151 · 14,806 served
Lawrenceburg Water & Sewer Dept
KY0030239 · 14,748 served
Southern Madison Water District
KY0760407 · 14,707 served
North Shelby Water District
KY1060324 · 14,660 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