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Simpson County, Mississippi — public water systems

At a glance

16 active public water systems are filed under Simpson County, Mississippi in EPA's SDWIS records, together reporting 35,130 people served. The largest is Okatoma Water Association #2, which reports serving 5,866 people. 15 are community water systems serving people where they live; the other 1 are non-community systems, such as schools, workplaces, campgrounds and gas stations with their own supply.

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

Active systems

16

Population served

35.1K

Community systems

15

Groundwater share

100%

How does Simpson County compare with other Mississippi counties?

Simpson County has the 23rd-most active public water systems among the 98 counties listed for active Mississippi systems in EPA records; among the 82 with 3 or more systems, the median has 12. Its systems report 35,130 people served in total, the 24th-largest county figure in the state and 1.1% of the statewide total. The average system here reports serving 2,196 people, about 22% below the Mississippi average of 2,832. Population figures are what each system reports; people served by more than one system, such as a wholesaler and the town that buys from it, are counted by each.

Where does Simpson County's drinking water come from?

By primary water source, Simpson County's active systems draw on groundwater (16, 100%). Overall, all rely mainly on groundwater (including purchased groundwater) and none on surface water, compared with 99% and 1.2% across Mississippi. Groundwater means the system draws its water from wells or springs fed by underground aquifers. The county's largest system, Okatoma Water Association #2, draws primarily on groundwater.

What kinds of water systems operate in Simpson County?

Simpson County's active systems break down as 15 community systems (94%) and 1 non-transient non-community systems (6.3%). A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. EPA lists their owner types as public/private partnership (63%), local government (25%), state government (6.3%) and private (6.3%).

Water systems in Simpson County

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Active public water systems in Simpson County, Mississippi
#Water systemCountyPopulation servedTypeSource
1Okatoma Water Association #2Simpson5,866CommunityGroundwater
2Smiths Crossing Water AssnSimpson4,480CommunityGroundwater
3Okatoma Water Association #1Simpson3,981CommunityGroundwater
4City of MageeSimpson3,526CommunityGroundwater
5New Hope Water AssociationSimpson2,587CommunityGroundwater
6City of MendenhallSimpson2,500CommunityGroundwater
7Highway 28 Water AssociationSimpson2,500CommunityGroundwater
8Shivers Water AssociationSimpson2,200CommunityGroundwater
9Harrisville W/ASimpson1,967CommunityGroundwater
10Boggan Ridge W/ASimpson1,500CommunityGroundwater
11Poplar Springs Water DistrictSimpson1,188CommunityGroundwater
12Boggan Ridge W/A-Pine GroveSimpson1,177CommunityGroundwater
13Town of BraxtonSimpson800CommunityGroundwater
14Town of DloSimpson510CommunityGroundwater
15Boswell Regional CenterSimpson248CommunityGroundwater
16Howard IndustriesSimpson100Non-transient non-communityGroundwater

Simpson County water systems: frequently asked questions

How many public water systems are in Simpson County, Mississippi?

EPA's SDWIS records file 16 active public water systems under Simpson County, Mississippi: 15 community systems (94%) and 1 non-transient non-community systems (6.3%).

Who supplies drinking water in Simpson County, MS?

The largest community water systems filed under Simpson County are Okatoma Water Association #2 (5,866 people served), Smiths Crossing Water Assn (4,480 people served) and Okatoma Water Association #1 (3,981 people served). Which system serves a particular address depends on its service area, which EPA's SDWIS records do not include; a water bill or the local utility can confirm it.

Does Simpson County's drinking water come from groundwater or surface water?

Of the 16 active public water systems in Simpson County, all draw mainly on groundwater and none on surface water, counting purchased supplies. The largest system, Okatoma Water Association #2, uses groundwater.

Where can I find a water quality report for Simpson County?

Each community water system must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1, covering the previous calendar year. 15 community systems are filed under Simpson County, so the report to look for is the one from the system that supplies your address.

How can I check violations for a water system in Simpson County?

Open the system's profile from the list on this page. Each profile shows the most recent Safe Drinking Water Act violations in EPA's records, with plain-English labels and whether each one is resolved. For current compliance status, EPA ECHO is the primary source.

More Mississippi water systems

About this data

Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.

Cite as: AquaCensus, “Public water systems in Simpson County, Mississippi”, https://aquacensus.com/water-systems/mississippi/simpson (data as of October 1, 2026).