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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
276–300 of 794Tishomingo Co Water District
MS0710004 · 2,598 served
City of Purvis
MS0370009 · 2,590 served
Oktoc Water Association #1
MS0530014 · 2,587 served
New Hope Water Association
MS0640008 · 2,587 served
Dumas-pine Grove Water Assn
MS0700012 · 2,582 served
Copiah W/a - Hazlehurst
MS0150002 · 2,574 served
Dorsey Water Association
MS0290002 · 2,561 served
North Lee W/a-beech Springs
MS0410041 · 2,556 served
Freeny W/a #2-rosebud System
MS0400018 · 2,550 served
Pisgah Water Association
MS0610019 · 2,542 served
Ne Itawamba W/a #1-ridge
MS0290016 · 2,537 served
Sparta Water Association #1
MS0090010 · 2,532 served
City of Hernando - Laughter
MS0170050 · 2,521 served
Holcut-cairo Water Assn
MS0590007 · 2,513 served
City of Mendenhall
MS0640007 · 2,500 served
Prairie Land Water Association, Inc
MS0440096 · 2,500 served
Highway 28 Water Association
MS0640005 · 2,500 served
Cleary Water Sewer & Fire Dept
MS0610022 · 2,500 served
Double Ponds Water Association
MS0330003 · 2,500 served
Ms State Penitentiary-mn Ln
MS0670014 · 2,500 served
Town of Vaiden
MS0080009 · 2,497 served
Central Yazoo #1 Fletchers Ch.
MS0820004 · 2,482 served
City Point Water Association
MS0410004 · 2,479 served
Southwest Leake Water Assn
MS0400008 · 2,463 served
Hancock County Water & Sewer- Bayside
MS0230071 · 2,458 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