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
351–375 of 794Town of Smithville
MS0480012 · 2,062 served
Philadelphia Water Assn
MS0310010 · 2,062 served
Ne Itawamba W/a #2-salem
MS0290017 · 2,054 served
Siloam W/a #2-griffith Well
MS0130015 · 2,054 served
Anchor Water Association
MS0360002 · 2,051 served
Town of Blue Mountain
MS0700001 · 2,049 served
City of Itta Bena
MS0420002 · 2,049 served
Town of Myrtle
MS0730005 · 2,037 served
Independence Water Association
MS0540011 · 2,035 served
Golden Triangle Water Assn #1
MS0130018 · 2,033 served
Carnes Water Association #2
MS0660024 · 2,025 served
Lincoln Rural W/a-old Red Star
MS0430031 · 2,001 served
City of Fayette
MS0320001 · 2,000 served
Coahoma Community College
MS0140033 · 2,000 served
City of Shelby
MS0060019 · 1,998 served
Town of Sumrall
MS0370010 · 1,998 served
City of Nettleton
MS0410008 · 1,995 served
Grenada Ind Pk & Airport Water
MS0220036 · 1,991 served
Lampton Water Association
MS0460009 · 1,983 served
Town of Edwards
MS0250005 · 1,980 served
Town of Ashland
MS0050001 · 1,977 served
Southeast Chickasaw W/a #1
MS0090008 · 1,969 served
Runnelstown-north
MS0560005 · 1,968 served
Harrisville W/a
MS0640004 · 1,967 served
City of Quitman
MS0120007 · 1,964 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
Quick Links
Data source: Utility data from EPA SDWIS. 794 active community water systems ingested. CCR contaminant data ingestion in progress.
Last updated: 2026-04-22