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
1–25 of 794City of Jackson
MS0250008 · 189,673 served
City of Gulfport
MS0240003 · 75,056 served
City of Southaven
MS0170018 · 56,000 served
City of Olive Branch
MS0170015 · 54,025 served
City of Hattiesburg
MS0180008 · 43,449 served
City of Tupelo
MS0410015 · 37,000 served
City of Meridian
MS0380005 · 34,466 served
City of Starkville
MS0530020 · 32,027 served
City of Brandon
MS0610003 · 31,852 served
City of Flowood
MS0610075 · 31,574 served
City of Greenville
MS0760004 · 29,602 served
City of Vicksburg
MS0750010 · 29,238 served
West Jackson Co Utility Dist
MS0300156 · 28,544 served
City of Oxford
MS0360011 · 28,500 served
City of Jackson-maddox Rd.
MS0250012 · 28,098 served
City of Pearl
MS0610017 · 27,115 served
University of Mississippi
MS0360015 · 26,874 served
Bear Creek W/a-west
MS0450021 · 26,677 served
City of Ocean Springs
MS0300005 · 26,168 served
City of Clinton
MS0250003 · 25,000 served
City of Ridgeland
MS0450013 · 24,340 served
Columbus Light & Water
MS0440003 · 23,616 served
City of Biloxi
MS0240001 · 23,310 served
City of Pascagoula
MS0300006 · 22,686 served
City of Gautier
MS0300004 · 22,253 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