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Mississippi Water Quality
794
Utilities in database
3.1M
Residents served
30%
On private wells
3
Key contaminants tracked
Drinking Water in Mississippi
Mississippi has 794 community water systems serving approximately 3.1 million residents. Primary water sources include groundwater. The most commonly reported contaminants include disinfection byproducts, lead, nitrates. 30% of Mississippi residents rely on private wells. MDEQ holds primary enforcement authority under the Safe Drinking Water Act.
Utilities in Mississippi
651–675 of 794Town of Louise
MS0270004 · 870 served
Kwp Utility Company Llc
MS0720026 · 869 served
Alpine Water Association
MS0730001 · 866 served
Town of Friars Point
MS0140004 · 858 served
Traxler Water Association
MS0650012 · 855 served
Town of Sherman
MS0580008 · 847 served
Humphreys Co W/a #6-gooden Lak
MS0270022 · 847 served
Sapa Water System
MS0780009 · 842 served
Youngs W/s Dist #2-youngs Sys
MS0220065 · 842 served
Harmony Water Association #2
MS0120018 · 840 served
Cascilla Water Association
MS0680001 · 837 served
Town of Snow Lake Shores
MS0050003 · 834 served
Country Haven Mobile Home Park
MS0170027 · 829 served
Sixtown Water Association
MS0190006 · 828 served
Town of Tishomingo
MS0710010 · 818 served
Erata Water Association
MS0340004 · 818 served
Siloam W/a #3-beasley Well
MS0130016 · 810 served
S Ms Public Water Auth-rock Hill
MS0180022 · 803 served
Town of Braxton
MS0640002 · 800 served
Hinds Co Detention Ctr
MS0250097 · 800 served
Town of Crenshaw
MS0540005 · 800 served
Double Springs Water Assn
MS0530008 · 797 served
The Oaks Utilities
MS0240256 · 797 served
Thomasville W/a #2
MS0610086 · 795 served
Looxahoma Water Association
MS0690004 · 792 served
Key Contaminant Concerns in Mississippi
Lead
Lead is a naturally occurring heavy metal that was widely used in plumbing infrastructure until it was banned for new installations in 1986. An estimated 9.2 million lead service lines still connect homes to public water mains across the United States, along with millions of homes with lead solder in their internal plumbing.
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.
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Data source: Utility data from EPA SDWIS. 794 active community water systems ingested. CCR contaminant data ingestion in progress.
Last updated: 2026-04-22