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
476–500 of 794Town of Shannon
MS0410013 · 1,500 served
Prvwsd-main Harbor
MS0450019 · 1,497 served
Conehoma Water Assn #1
MS0040001 · 1,495 served
Acl Water Association #1
MS0610001 · 1,492 served
Siloam W/a #6-una System
MS0130023 · 1,489 served
Town of Terry
MS0250025 · 1,486 served
Boyle-skene W/a#3
MS0060051 · 1,486 served
Bexley Water Association
MS0200003 · 1,486 served
Sontag-wanilla
MS0390006 · 1,484 served
French Camp W/a #1
MS0100004 · 1,478 served
East Chickasaw W/a #1
MS0090002 · 1,463 served
Enon-locke-curtis Water Assn
MS0540006 · 1,460 served
Central W/a-arlington
MS0500001 · 1,460 served
Union Church Waterworks Assn
MS0320004 · 1,456 served
Town of Walnut
MS0700011 · 1,449 served
Wellsgate
MS0360068 · 1,447 served
Hermanville Water Association
MS0110003 · 1,442 served
Savannah Water Association #1
MS0780012 · 1,434 served
Simpson Water Association #1
MS0100008 · 1,426 served
Town of Hickory Flat
MS0050002 · 1,423 served
Yalobusha Water/sewer Dist #1
MS0810028 · 1,422 served
Pearlington Water and Sewer District
MS0230067 · 1,412 served
Liberty-plattsburg W/a #2
MS0800019 · 1,412 served
Ocean Beach
MS0300113 · 1,407 served
Oak Grove Water Assn
MS0340011 · 1,405 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