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Catahoula Parish County, Louisiana — public water systems

At a glance

7 active public water systems are filed under Catahoula Parish County, Louisiana in EPA's SDWIS records, together reporting 12,708 people served. The largest is Sandy Lake Water Supply, which reports serving 3,141 people. All 7 are community water systems serving people where they live.

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

Active systems

7

Population served

12.7K

Community systems

7

Groundwater share

100%

How does Catahoula Parish County compare with other Louisiana counties?

Catahoula Parish County has the 48th-most active public water systems among the 79 counties listed for active Louisiana systems in EPA records; among the 59 with 3 or more systems, the median has 13. Its systems report 12,708 people served in total, the 59th-largest county figure in the state and 0.2% of the statewide total. The average system here reports serving 1,815 people, about 61% below the Louisiana average of 4,685. 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 Catahoula Parish County's drinking water come from?

By primary water source, Catahoula Parish County's active systems draw on groundwater (7, 100%). Overall, all rely mainly on groundwater (including purchased groundwater) and none on surface water, compared with 92% and 7.7% across Louisiana. Groundwater means the system draws its water from wells or springs fed by underground aquifers. The county's largest system, Sandy Lake Water Supply, draws primarily on groundwater.

What kinds of water systems operate in Catahoula Parish County?

Catahoula Parish County's active systems break down as 7 community systems (100%). 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. EPA lists their owner types as private (57%) and local government (43%).

Water systems in Catahoula Parish County

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Active public water systems in Catahoula Parish County, Louisiana
#Water systemCountyPopulation servedTypeSource
1Sandy Lake Water SupplyCatahoula Parish3,141CommunityGroundwater
2Town of Jonesville Water SystemCatahoula Parish2,811CommunityGroundwater
3Black River Water SystemCatahoula Parish2,256CommunityGroundwater
4Village of Harrisonburg Water SystemCatahoula Parish1,530CommunityGroundwater
5Leland Water System Inc.Catahoula Parish1,140CommunityGroundwater
6Village of Sicily IslandCatahoula Parish930CommunityGroundwater
7Maitland Water Works DistrictCatahoula Parish900CommunityGroundwater

Catahoula Parish County water systems: frequently asked questions

How many public water systems are in Catahoula Parish County, Louisiana?

EPA's SDWIS records file 7 active public water systems under Catahoula Parish County, Louisiana: 7 community systems (100%).

Who supplies drinking water in Catahoula Parish County, LA?

The largest community water systems filed under Catahoula Parish County are Sandy Lake Water Supply (3,141 people served), Town of Jonesville Water System (2,811 people served) and Black River Water System (2,256 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 Catahoula Parish County's drinking water come from groundwater or surface water?

Of the 7 active public water systems in Catahoula Parish County, all draw mainly on groundwater and none on surface water, counting purchased supplies. The largest system, Sandy Lake Water Supply, uses groundwater.

Where can I find a water quality report for Catahoula Parish 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. 7 community systems are filed under Catahoula Parish 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 Catahoula Parish 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 Louisiana 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 Catahoula Parish County, Louisiana”, https://aquacensus.com/water-systems/louisiana/catahoula-parish (data as of October 1, 2026).