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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
226–250 of 403Quebeck Walling U.d.
TN0000569 · 5,349 served
Roane Central Utility District
TN0000457 · 5,317 served
Halls Water System
TN0000279 · 5,287 served
Northeast Henry County U.d.
TN0000540 · 5,155 served
Trenton Water System
TN0000707 · 5,155 served
Monterey Water Dept
TN0000471 · 5,072 served
Jellico Utilities Authority
TN0000330 · 5,056 served
Somerville Water System
TN0000641 · 5,020 served
Persia Utility District
TN0000594 · 4,966 served
Decherd Water Dept
TN0000187 · 4,809 served
Leoma Utility District
TN0000399 · 4,808 served
Loretto Water Department
TN0000408 · 4,773 served
Lobelville Water Dept
TN0000406 · 4,752 served
North Overton Utility District
TN0000013 · 4,729 served
Scotts Hill Water System
TN0000614 · 4,579 served
Bon De Croft Utility District
TN0000653 · 4,577 served
Unicoi Utility District
TN0000719 · 4,527 served
Northwest Clay County Utility
TN0000573 · 4,437 served
South Side U.d. #1
TN0000904 · 4,431 served
Estill Springs Water Dept
TN0000232 · 4,317 served
Parsons Water Department
TN0000541 · 4,303 served
Monteagle Public Utility Board
TN0000470 · 4,179 served
White Pine Water System
TN0000746 · 4,171 served
Tennessee Ridge Water System
TN0000698 · 4,169 served
Clifton Water Dept
TN0000119 · 4,110 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