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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
26–50 of 403Lebanon Water System
TN0000393 · 60,669 served
Eastside Utility District
TN0000219 · 59,612 served
Hendersonville U.d.
TN0000294 · 59,034 served
Bartlett Water System
TN0000765 · 57,129 served
South Blount Utility District
TN0000643 · 53,864 served
Collierville Water Dept
TN0000126 · 51,972 served
City of Maryville W&s Dept
TN0000438 · 49,135 served
Cookeville Water Dept
TN0000133 · 48,711 served
Springfield Water System
TN0000666 · 43,338 served
Fort Campbell Water System
TN0000820 · 43,270 served
Oak Ridge Dept of Public Works
TN0000522 · 41,614 served
Knox-chapman Utility District
TN0000367 · 41,311 served
H.b.& T.s. Utility District
TN0000699 · 40,094 served
Sevierville Water System
TN0000617 · 39,885 served
Morristown Utilities Commission
TN0000474 · 39,883 served
La Vergne Water System
TN0000386 · 38,730 served
Milcrofton Utility District
TN0000247 · 38,032 served
Germantown Water Dept
TN0000262 · 37,738 served
Bristol Department of Utilities
TN0000073 · 37,648 served
Alcoa Water System
TN0000007 · 35,238 served
Newport Utilities Board
TN0000500 · 34,925 served
Lenoir City Utility Board
TN0000396 · 34,786 served
Shelbyville Water System
TN0000628 · 34,772 served
Crossville Water Dept
TN0000150 · 33,135 served
Jonesborough Water Dept
TN0000338 · 33,069 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