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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
176–200 of 403Old Knoxville Hwy U.d.
TN0000530 · 8,296 served
Erin Water Department
TN0000230 · 8,239 served
Dewhite Utility District
TN0000190 · 8,219 served
Newbern Water Dept
TN0000496 · 8,098 served
Ripley Water System
TN0000580 · 8,030 served
Minor Hill Water U.d.
TN0000469 · 8,021 served
Maynardville Water Dept
TN0000442 · 7,940 served
Bangham Utility District
TN0000038 · 7,906 served
Metro Lynchburg/moore Co U.d. #1
TN0000416 · 7,895 served
Tn American - Sequatchie Valley
TN0000749 · 7,842 served
Baxter Water Department
TN0000040 · 7,781 served
Tellico Plains Water Dept
TN0000693 · 7,759 served
Signal Mountain Water System
TN0000634 · 7,714 served
South Fork Utility District
TN0000644 · 7,645 served
First U.d. of Hardin County
TN0000546 · 7,388 served
South Pittsburg Water System
TN0000651 · 7,304 served
Smithville Water System
TN0000637 · 7,049 served
Fairview Utility District
TN0000563 · 7,036 served
Nsa - Midsouth
TN0000468 · 7,000 served
South Giles Utility District
TN0000649 · 6,985 served
Center Grove-winchester Springs
TN0000101 · 6,916 served
Sylvia-tn City-pond U.d.
TN0000691 · 6,738 served
Double Springs U.d.
TN0000192 · 6,567 served
Union Fork-bakewell U.d.
TN0000037 · 6,464 served
Decatur Water Dept
TN0000183 · 6,451 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