How many public water systems are in Mississippi?

Mississippi has 1,181 active public water systems in EPA SDWIS records, including 988 community water systems. Together they report serving 3.3M people.

What is the largest water system in Mississippi?

City of Jackson is the largest active public water system in Mississippi, serving a reported 189,673 people.

Does Mississippi rely more on groundwater or surface water?

98.8% of Mississippi's active public water systems draw primarily on groundwater and 1.2% on surface water (including purchased supplies).

Mississippi public water systems

1,181 active systems regulated under the Safe Drinking Water Act, serving a reported 3.3M people across 98 counties.

Dataset updated July 2026 . Source: EPA SDWIS/ECHO, refreshed quarterly.

Active systems

1,181

Population served

3.3M

Community systems

988

Groundwater share

98.8%

System types in Mississippi

988

Community water system

Non-transient non-community water system

111

Transient non-community water system

Largest water systems in Mississippi

The largest active public water systems in Mississippi by population served
#	Water system	County	Population served	Type	Source
1	City of Jackson	Hinds	189,673	Community	Surface water
2	City of Gulfport	Harrison	75,056	Community	Groundwater
3	City of Southaven	DeSoto	56,000	Community	Groundwater
4	City of Olive Branch	DeSoto	54,025	Community	Groundwater
5	City of Hattiesburg	Forrest	43,449	Community	Groundwater
6	City of Tupelo	Lee	37,000	Community	Purchased surface water
7	City of Meridian	Lauderdale	34,466	Community	Groundwater
8	City of Starkville	Oktibbeha	32,027	Community	Groundwater
9	City of Brandon	Rankin	31,852	Community	Groundwater
10	City of Flowood	Rankin	31,574	Community	Groundwater
11	City of Greenville	Washington	29,602	Community	Groundwater
12	City of Vicksburg	Warren	29,238	Community	Groundwater
13	West Jackson Co Utility Dist	Jackson	28,544	Community	Groundwater
14	City of Oxford	Lafayette	28,500	Community	Groundwater
15	City of Jackson-Maddox Rd.	Hinds	28,098	Community	Groundwater
16	City of Pearl	Rankin	27,115	Community	Groundwater
17	University of Mississippi	Lafayette	26,874	Community	Groundwater
18	Bear Creek W/A-West	Madison	26,677	Community	Groundwater
19	City of Ocean Springs	Jackson	26,168	Community	Groundwater
20	City of Clinton	Hinds	25,000	Community	Groundwater
21	City of Ridgeland	Madison	24,340	Community	Groundwater
22	Columbus Light & Water	Lowndes	23,616	Community	Groundwater
23	City of Biloxi	Harrison	23,310	Community	Groundwater
24	City of Pascagoula	Jackson	22,686	Community	Groundwater
25	City of Gautier	Jackson	22,253	Community	Groundwater

By county

Harrison42 systems Rankin36 systems Jackson30 systems Hinds30 systems Bolivar29 systems Panola28 systems Lee25 systems Oktibbeha24 systems Jones23 systems DeSoto22 systems Lafayette22 systems Holmes21 systems Hancock20 systems Pearl River18 systems Tate18 systems Coahoma18 systems Yalobusha18 systems Yazoo18 systems Copiah17 systems Madison17 systems Montgomery17 systems Grenada17 systems Pike17 systems Calhoun17 systems Simpson16 systems Leflore16 systems Tallahatchie16 systems Jasper16 systems Forrest15 systems Washington14 systems Lauderdale14 systems Lowndes14 systems Scott14 systems Smith14 systems Attala14 systems Sunflower14 systems Franklin14 systems Marshall13 systems Monroe13 systems Leake13 systems Pontotoc12 systems Union12 systems Prentiss12 systems Chickasaw12 systems Webster12 systems Clarke12 systems Tippah12 systems Kemper12 systems Choctaw11 systems Perry11 systems Lamar11 systems Stone11 systems Lawrence11 systems Humphreys11 systems Quitman11 systems Winston11 systems Newton11 systems Marion11 systems Lincoln10 systems Amite10 systems George10 systems Tishomingo10 systems Covington10 systems Itawamba9 systems Wilkinson9 systems Noxubee8 systems Jefferson Davis8 systems Wayne8 systems Alcorn8 systems Clay8 systems Carroll7 systems Warren7 systems Jefferson7 systems Adams7 systems Greene7 systems Claiborne7 systems Walthall6 systems Benton6 systems Neshoba6 systems Sharkey5 systems Washington Parish3 systems Issaquena3 systems

Tangipahoa Parish2 systems

Tunica2 systems

St. Tammany Parish1 systems

Colquitt1 systems

Taney1 systems

Lewis1 systems

Burnet1 systems

Brazos1 systems

Anderson1 systems

Freestone1 systems

McLennan1 systems

Robertson1 systems

East Baton Rouge Parish1 systems

Red River1 systems

Jim Wells1 systems

Westmoreland1 systems