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
26–50 of 794City of Greenwood
MS0420001 · 19,140 served
Bear Creek W/a -east
MS0450002 · 18,770 served
City of Long Beach
MS0240005 · 18,514 served
West Lamar Water Assn #1
MS0370011 · 18,491 served
City of Laurel
MS0340021 · 18,100 served
City of Canton
MS0450006 · 16,785 served
City of Cleveland
MS0060006 · 16,392 served
City of Madison
MS0450010 · 16,136 served
City of West Point
MS0130008 · 15,062 served
Ms State University
MS0530012 · 15,000 served
City of Corinth
MS0020002 · 15,000 served
Clarksdale Public Utilities
MS0140002 · 14,903 served
City of Natchez
MS0010002 · 14,520 served
City of Hernando
MS0170009 · 14,457 served
City of Horn Lake
MS0170022 · 13,649 served
North Lamar Water Association
MS0370006 · 12,778 served
City of Grenada
MS0220003 · 12,762 served
Horn Lake Water Association
MS0170010 · 12,735 served
Diberville W/s
MS0240002 · 12,721 served
Diamondhead Utilities-north
MS0230005 · 12,577 served
City of Moss Point
MS0300008 · 12,524 served
City of Brookhaven
MS0430002 · 12,513 served
South Central Water Assn
MS0250022 · 12,260 served
City of Mccomb
MS0570004 · 12,041 served
City of Picayune Utilities
MS0550004 · 11,859 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