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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
576–600 of 794Cross-roads Water Association
MS0070005 · 1,125 served
Town of Metcalfe
MS0760007 · 1,125 served
Town of Carrollton
MS0080002 · 1,122 served
Sessums Water Association
MS0530019 · 1,117 served
Town of Heidelberg
MS0310005 · 1,114 served
Town of Beaumont
MS0560001 · 1,106 served
Town of Inverness
MS0670007 · 1,104 served
Southwest Wayne Water Assn
MS0770007 · 1,101 served
Crooked Creek W/a - North
MS0390007 · 1,100 served
Crooked Creek W/a - South
MS0390008 · 1,100 served
Town of Mathiston
MS0780007 · 1,090 served
North Lee W/a-auburn System #1
MS0410001 · 1,088 served
Mt Comfort W/a
MS0070010 · 1,085 served
Town of Potts Camp
MS0470004 · 1,085 served
Mt Olivet Water Association
MS0540013 · 1,082 served
Big Black Water Association
MS0450003 · 1,080 served
Town of Pittsboro
MS0070015 · 1,077 served
Hatten Water Assn
MS0340006 · 1,075 served
Town of Liberty
MS0030004 · 1,069 served
Lewisburg -ingrams Mill North
MS0170049 · 1,067 served
Tri-lakes Water Assn-west
MS0810012 · 1,059 served
Holmes Jr College
MS0260010 · 1,052 served
Matthews Moss Water Assn
MS0340008 · 1,051 served
Town of Tutwiler
MS0680010 · 1,040 served
Town of Mount Olive
MS0160003 · 1,032 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