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
451–475 of 794City of Lexington
MS0260012 · 1,600 served
Town of State Line
MS0210005 · 1,600 served
North Hinds W/a #2-chapel Hill
MS0250029 · 1,595 served
Town of Ackerman
MS0100001 · 1,594 served
Toccopola Water Association #2
MS0580017 · 1,592 served
Town of Pickens
MS0260013 · 1,587 served
Tombigbee W/a
MS0290009 · 1,581 served
Troy Water Association
MS0580010 · 1,580 served
Marydell Water Association
MS0400016 · 1,573 served
West Marion Water Association
MS0460013 · 1,571 served
Copiah W/a - Gallman
MS0150004 · 1,566 served
Houston-palestine Water Assoc
MS0290004 · 1,563 served
East Oxford Water Association
MS0360006 · 1,544 served
Ethel Rural Water Association
MS0040003 · 1,544 served
Talking Warrior Water Assn #1
MS0530022 · 1,539 served
Tallahala W/a-garlandsville
MS0310016 · 1,534 served
Billys Creek Rural W/a
MS0810015 · 1,532 served
New Candler Water Association
MS0590011 · 1,531 served
Sardis Lake Community W/a
MS0540063 · 1,521 served
J P Utility Dist #2
MS0340036 · 1,521 served
Town of New Houlka
MS0090003 · 1,515 served
Town of Summit
MS0570013 · 1,502 served
Conehoma Water Assn #2
MS0040029 · 1,500 served
Boggan Ridge W/a
MS0640001 · 1,500 served
Delta State University
MS0060007 · 1,500 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.
Mississippi Water FAQs
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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