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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
376–400 of 403Trezevant Water System
TN0000710 · 955 served
Hollow Rock Water Dept
TN0000310 · 954 served
Bethel Springs Water System
TN0000050 · 944 served
Dekalb Utility District #4
TN0000835 · 927 served
Friendship Distribution Water System
TN0000928 · 904 served
Hornsby Water Dept
TN0000312 · 892 served
Puryear Water System
TN0000568 · 833 served
Moscow Water Dept
TN0000477 · 821 served
East Sevier County U.d.
TN0000618 · 815 served
Trimble Water System
TN0000711 · 776 served
Crockett Mills Utility District
TN0000148 · 757 served
Harbor Utility District
TN0000055 · 750 served
Samburg Utility District
TN0000607 · 736 served
Iron City Utility District
TN0000320 · 729 served
Toone Water System
TN0000704 · 720 served
Grand Valley Lakes P.o.a.
TN0000451 · 702 served
South Side U.d. #2
TN0000910 · 702 served
First U.d. of Hawkins Co #2
TN0000939 · 695 served
Jackson County U.d. #1
TN0000252 · 686 served
Brownlow Utility District
TN0000480 · 683 served
Gates Water Dept
TN0000255 · 670 served
Reelfoot Water Association
TN0000757 · 644 served
Stanton Water System
TN0000672 · 631 served
West Stewart Utility District
TN0000916 · 629 served
Shelbyville Flat Creek W.s.
TN0008272 · 620 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