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
151–175 of 794Town of Byhalia
MS0470001 · 4,446 served
Pearl River Central W/a-henley Field
MS0550060 · 4,438 served
Pearl River Central W/a-bi Co
MS0550058 · 4,406 served
City of Wiggins
MS0660005 · 4,300 served
Lexie Water Association, Inc.
MS0740004 · 4,290 served
North Hinds W/a #1-brownsville
MS0250015 · 4,277 served
City of Flowood - Noranco
MS0610044 · 4,274 served
Wheeler-frankstown Water Assn
MS0590014 · 4,203 served
Whistler Water Association
MS0770004 · 4,116 served
North Lumberton Utility Assn
MS0370007 · 4,071 served
Hamilton Water District
MS0480007 · 4,029 served
Langford Water Association
MS0610012 · 4,013 served
Okatoma Water Association #1
MS0640009 · 3,981 served
Long Creek Water Assn #2
MS0380106 · 3,977 served
Ms State Hospital-whitfield
MS0610032 · 3,950 served
G T & Y Water District Inc
MS0220002 · 3,907 served
Beat Iii W/a #1-sand Hill
MS0210001 · 3,881 served
Big V Water Association
MS0590002 · 3,878 served
J P Utility District
MS0340007 · 3,839 served
Leesburg Water Association
MS0610013 · 3,836 served
Sunnyhill Water Association
MS0570014 · 3,833 served
Toomsuba Water Association
MS0380009 · 3,828 served
Southern Rankin W/a #2 Plain
MS0610024 · 3,810 served
Mooreville-richmond W/a #1
MS0410007 · 3,807 served
Copiah-new Zion Water Assn,inc
MS0150009 · 3,791 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