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
301–325 of 794North Decatur W/a #1
MS0510012 · 2,455 served
Porterville W/a
MS0350006 · 2,445 served
Mt Comfort W/a-banner
MS0070020 · 2,442 served
Friendship Community W/a
MS0570002 · 2,434 served
Mt Gilead-improve Water Assn
MS0460012 · 2,416 served
Powers Water Association
MS0340015 · 2,413 served
Grenada Co W/s-girl Scout
MS0220005 · 2,410 served
Northeast Jeff Davis W/a
MS0330007 · 2,400 served
Town of North Carrollton
MS0080006 · 2,392 served
Shady Grove Utility District
MS0340017 · 2,390 served
Palmetto W/a
MS0410018 · 2,376 served
Eastabuchie Water Association
MS0180006 · 2,363 served
Yokena-jeff Davis Water District Inc
MS0750011 · 2,360 served
Kokomo-shiloh Water Assn.
MS0460014 · 2,344 served
Sw Rankin Water Association #2
MS0610040 · 2,334 served
North Covington W/a-south
MS0160011 · 2,326 served
City of Hollandale
MS0760005 · 2,323 served
Town of Tylertown
MS0740005 · 2,321 served
Beulah Hubbard Water Assn, Inc
MS0510001 · 2,318 served
Prentiss-alcorn Water Assn
MS0020014 · 2,318 served
City of Magnolia
MS0570005 · 2,307 served
Town of Moorhead
MS0670008 · 2,301 served
City of Drew
MS0670004 · 2,300 served
Willow Grove Water Assn
MS0160010 · 2,284 served
Pearl River Central W/a-north
MS0550002 · 2,278 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