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Ouachita Parish County, Louisiana — public water systems

At a glance

28 active public water systems are filed under Ouachita Parish County, Louisiana in EPA's SDWIS records, together reporting 182,392 people served. The largest is City of Monroe Water System, which reports serving 57,000 people. 23 are community water systems serving people where they live; the other 5 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

28

Population served

182.4K

Community systems

23

Groundwater share

96.4%

How does Ouachita Parish County compare with other Louisiana counties?

Ouachita Parish County has the 7th-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 182,392 people served in total, the 8th-largest county figure in the state and 3.5% of the statewide total. The average system here reports serving 6,514 people, about 39% above 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 Ouachita Parish County's drinking water come from?

By primary water source, Ouachita Parish County's active systems draw on groundwater (22, 79%), purchased groundwater (5, 18%) and surface water (1, 3.6%). Overall, 96% rely mainly on groundwater (including purchased groundwater) and 3.6% 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, City of Monroe Water System, draws primarily on surface water.

What kinds of water systems operate in Ouachita Parish County?

Ouachita Parish County's active systems break down as 23 community systems (82%), 4 non-transient non-community systems (14%) and 1 transient non-community systems (3.6%). 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. A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. EPA lists their owner types as private (89%) and local government (11%).

Water systems in Ouachita Parish County

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Active public water systems in Ouachita Parish County, Louisiana
#Water systemCountyPopulation servedTypeSource
1City of Monroe Water SystemOuachita Parish57,000CommunitySurface water
2West Monroe Water SystemOuachita Parish16,005CommunityGroundwater
3West Hwy 80 Ark Road WsOuachita Parish14,649CommunityGroundwater
4Gowc North Water SystemOuachita Parish13,287CommunityGroundwater
5Gowc East Water SystemOuachita Parish11,742CommunityGroundwater
6Cheniere Drew North Water SystemOuachita Parish11,280CommunityGroundwater
7Southwest Ouachita Waterworks, Inc.Ouachita Parish10,725CommunityGroundwater
8Brownville Water SystemOuachita Parish9,696CommunityGroundwater
9Kiroli Darbonne WsOuachita Parish9,210CommunityGroundwater
10South Monroe Ws GowcOuachita Parish7,335CommunityGroundwater
11Cadeville Water DistrictOuachita Parish6,219CommunityGroundwater
12Prairie Road Water DistrictOuachita Parish2,598CommunityGroundwater
13Better Waterworks Water SystemOuachita Parish2,160CommunityGroundwater
14Indian Village Water SystemOuachita Parish2,082CommunityGroundwater
15Cheniere Drew South Water SystemOuachita Parish1,563CommunityGroundwater
16Frost Town Water SystemOuachita Parish1,551CommunityGroundwater
17L&R North Water SystemOuachita Parish1,293CommunityGroundwater
18Graphic Packaging International Inc. - AOuachita Parish850Non-transient non-communityGroundwater
19Graphic Packaging International Inc. - BOuachita Parish850Non-transient non-communityGroundwater
20Lincoln Hills Subdivision WsOuachita Parish552CommunityPurchased groundwater
21West Ouachita Ind ParkOuachita Parish500Non-transient non-communityGroundwater
22Hidden Oaks Subdivision WsOuachita Parish438CommunityPurchased groundwater
23Mcclendon Community Water WellOuachita Parish336CommunityGroundwater
24International Paper - West MonroeOuachita Parish200Non-transient non-communityGroundwater
25Bayou Boeuf Rv Park Water SystemOuachita Parish100Transient non-communityGroundwater
26Ramsey Water SystemOuachita Parish84CommunityPurchased groundwater
27Pecan Lake Subdivision WsOuachita Parish57CommunityPurchased groundwater
28Wildwood MHP WsOuachita Parish30CommunityPurchased groundwater

Ouachita Parish County water systems: frequently asked questions

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

EPA's SDWIS records file 28 active public water systems under Ouachita Parish County, Louisiana: 23 community systems (82%), 4 non-transient non-community systems (14%) and 1 transient non-community systems (3.6%).

Who supplies drinking water in Ouachita Parish County, LA?

The largest community water systems filed under Ouachita Parish County are City of Monroe Water System (57,000 people served), West Monroe Water System (16,005 people served) and West Hwy 80 Ark Road Ws (14,649 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 Ouachita Parish County's drinking water come from groundwater or surface water?

Of the 28 active public water systems in Ouachita Parish County, 96% draw mainly on groundwater and 3.6% on surface water, counting purchased supplies. The largest system, City of Monroe Water System, uses surface water.

Where can I find a water quality report for Ouachita 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. 23 community systems are filed under Ouachita 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 Ouachita 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 Ouachita Parish County, Louisiana”, https://aquacensus.com/water-systems/louisiana/ouachita-parish (data as of October 1, 2026).