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Tennessee Water Quality
403
Utilities in database
7.8M
Residents served
22%
On private wells
2
Key contaminants tracked
Drinking Water in Tennessee
Tennessee has 403 community water systems serving approximately 7.8 million residents. Primary water sources include surface water. The most commonly reported contaminants include disinfection byproducts, nitrates. 22% of Tennessee residents rely on private wells. TDEC holds primary enforcement authority under the Safe Drinking Water Act.
Utilities in Tennessee
276–300 of 403Gibson Co Mun Water Dist #4
TN0000813 · 3,386 served
Dresden Water Dept
TN0000196 · 3,381 served
Cagle-fredonia U.d.
TN0000927 · 3,363 served
Siam Utility District
TN0000633 · 3,319 served
West Tn State Penitentiary
TN0000245 · 3,250 served
Elbridge Water Association
TN0000220 · 3,239 served
Cordell Hull Utility District
TN0000096 · 3,220 served
Collinwood Water Dept
TN0000127 · 3,131 served
Perryville Utility District
TN0000543 · 3,127 served
Jamestown Water Dept
TN0000324 · 3,078 served
Alamo Water Department
TN0000005 · 3,050 served
Spring City Water System
TN0000656 · 2,985 served
New Johnsonville Water Dept
TN0000497 · 2,961 served
Piperton Water System
TN0000842 · 2,956 served
Calhoun-charleston U.d.
TN0000106 · 2,895 served
Gibson Co Mun Water Dist #5
TN0000815 · 2,864 served
Michie Water Dept
TN0000454 · 2,825 served
Dyer Water Dept
TN0000209 · 2,783 served
Bluff City Water Department
TN0000061 · 2,763 served
Copper Basin Utility District
TN0000844 · 2,710 served
Lakeview U.d. West
TN0000596 · 2,684 served
Bell Buckle Water System
TN0000044 · 2,633 served
Tiptonville Water System
TN0000700 · 2,627 served
Alexandria Water System
TN0000008 · 2,626 served
Bells Public Utility District
TN0000045 · 2,610 served
Key Contaminant Concerns in Tennessee
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.
Tennessee Water FAQs
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Data source: Utility data from EPA SDWIS. 403 active community water systems ingested. CCR contaminant data ingestion in progress.
Last updated: 2026-04-19