State Hub
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
626–650 of 794Bethlehem Water Association
MS0730024 · 937 served
North Haven Water Association
MS0730008 · 930 served
Lake City Water Assn-west
MS0820015 · 929 served
Town of Rienzi
MS0020005 · 927 served
Yocona Water Association, Inc.
MS0360017 · 926 served
Town of Duck Hill
MS0490002 · 924 served
Pugh's Mill Water Association
MS0800007 · 924 served
Town of Richton
MS0560004 · 920 served
Harmony W/a #7-n Enterprise
MS0120028 · 919 served
Centerville Community W/a
MS0260004 · 918 served
Town of Enterprise
MS0120004 · 916 served
North Lee W/a-sws #1
MS0410044 · 916 served
Rock Hill Water Association
MS0530017 · 915 served
Thomastown Water Association
MS0400009 · 908 served
S Ms Public Water Auth-mclaurin
MS0180009 · 905 served
Town of Coffeeville
MS0810002 · 905 served
Star Water Company
MS0610027 · 904 served
Calvary Water Association
MS0800002 · 900 served
Boyle-skene Water Assn
MS0060047 · 898 served
So. Sunflower W/a-inverness
MS0670015 · 898 served
Parks Utilities
MS0520023 · 898 served
Wilkinson Co Correctional Cent
MS0790033 · 889 served
Morris Water Association
MS0650005 · 887 served
Town of Stonewall
MS0120009 · 879 served
South Winona Water Association
MS0490008 · 874 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