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
226–250 of 794Walls Water Association
MS0170019 · 2,999 served
Prvwsd-twin Harbor
MS0450024 · 2,973 served
Steele-ringgold W/a #1
MS0620011 · 2,965 served
Freeny W/a #1
MS0400003 · 2,962 served
Lincoln Rural W/a-pleasant Rid
MS0430003 · 2,938 served
Pattison W/a-west
MS0110004 · 2,933 served
City of Durant
MS0260006 · 2,932 served
Town of Bay Springs
MS0310002 · 2,925 served
Magnolia Rural Water Assn
MS0570015 · 2,922 served
City of Collins
MS0160002 · 2,921 served
Woolmarket Village Estates
MS0240237 · 2,910 served
Wallerville Water Association
MS0730009 · 2,886 served
Steele-ringgold W/a #2
MS0620023 · 2,883 served
N Central Amite Water Assn
MS0030026 · 2,872 served
Monterey Water Assn-west
MS0610016 · 2,827 served
Days Water Association
MS0170005 · 2,825 served
Town of Brooksville
MS0520001 · 2,816 served
Long Creek Water Assn #1
MS0380004 · 2,814 served
Good Hope Water Association
MS0330004 · 2,809 served
Poor House W/a #1
MS0220008 · 2,806 served
Strayhorn W/a-crockett
MS0690006 · 2,801 served
City of Okolona
MS0090007 · 2,800 served
Meridian Naval Air Station
MS0380026 · 2,800 served
City of Bruce
MS0070003 · 2,798 served
City of Verona
MS0410016 · 2,792 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