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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
751–775 of 794South Terry Water Assn
MS0250023 · 573 served
Wake Forest Water Assn
MS0530025 · 571 served
Town of New Augusta
MS0560002 · 570 served
South Lake Water Association
MS0600012 · 570 served
Houlka-washington Ext
MS0580023 · 570 served
Palmer Creek Utility Assc, Inc
MS0240247 · 570 served
Town of Mize
MS0650004 · 568 served
Mcnair-stampley W/a #3
MS0320015 · 562 served
Town of Weir
MS0100009 · 560 served
Echcpud-tradition Subdivision
MS0240266 · 557 served
Midway W/a #1
MS0820010 · 552 served
Town of Mayersville
MS0280001 · 549 served
Truelight Redevelopment Grp #2
MS0630037 · 546 served
Town of Arcola
MS0760001 · 546 served
Humphreys Co. W/a #1-midnight
MS0270018 · 544 served
Fentress Community W/s
MS0100003 · 544 served
Town of Merigold
MS0060012 · 542 served
North Bolivar W/a
MS0060054 · 539 served
Yalobusha Water/sewer Dist #2
MS0810029 · 537 served
Center Grove W/a #1
MS0530005 · 535 served
Tougaloo College
MS0450014 · 534 served
Arlington W/a
MS0560006 · 533 served
Valley Park W/a
MS0280018 · 533 served
Paynes Water Association
MS0680008 · 531 served
Morgan Chapel Water Assn
MS0530013 · 528 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