Public water system · LA1073047
ActiveSouthwest Ouachita Waterworks, Inc.
At a glance
Southwest Ouachita Waterworks, Inc. (PWSID LA1073047) is an active community water system in Ouachita Parish County, Louisiana. It reports serving 10,725 people through 3,575 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, 12 are health-based, and the most recent began in October 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
10,725
Service connections
3,575
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Southwest Ouachita Waterworks, Inc. compare with other water systems in Ouachita Parish County?
By EPA's size categories, Southwest Ouachita Waterworks, Inc. is a large system (10,001 to 100,000 people). Ouachita Parish County has 28 active public water systems. Its population served is about 65% above the county average of 6,514 people per system, and accounts for 5.9% of the 182,392 people reported by systems filed under the county. Across Louisiana, the 1,121 active systems average 4,685 people each. Nationally, the average active community water system reports serving 6,703 people, so Southwest Ouachita Waterworks, Inc. is about 60% above that figure.
What does “community water system” mean?
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. Louisiana has 815 active community water systems, 73% of the state's 1,121 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 966 Louisiana systems (86%) list groundwater as their primary source.
Who owns and regulates Southwest Ouachita Waterworks, Inc.?
EPA lists Southwest Ouachita Waterworks, Inc. as privately owned. The LA state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 25 of the 28 active systems in Ouachita Parish County (89%) are also privately owned.
Does Southwest Ouachita Waterworks, Inc. have drinking water violations?
Of the 12 most recent violations in EPA's records, 12 are health-based, and the most recent began in October 2024. The violations listed here began between July 2018 and October 2024. By type: 10 contaminant level above the legal limit and 2 required treatment not met. The contaminant or rule involved most often is Total trihalomethanes (TTHM) (9 of them). EPA lists 8 as resolved and 4 as archived. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2024-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Archived |
| 2024-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Archived |
| 2024-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Archived |
| 2024-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Archived |
| 2020-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2020-01-24 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Resolved |
| 2020-01-24 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Resolved |
| 2019-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2019-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2018-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Haloacetic acids (HAA5)code 2456 | Yes | Resolved |
| 2018-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2018-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
The 12 most recent violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Southwest Ouachita Waterworks, Inc.: frequently asked questions
Who runs Southwest Ouachita Waterworks, Inc.?
Southwest Ouachita Waterworks, Inc. (PWSID LA1073047) is a community water system privately owned. It is regulated by the LA state drinking water program.
How many people does Southwest Ouachita Waterworks, Inc. serve?
Southwest Ouachita Waterworks, Inc. reports serving 10,725 people through 3,575 service connections in Ouachita Parish County, Louisiana.
Where does Southwest Ouachita Waterworks, Inc. get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Southwest Ouachita Waterworks, Inc. have any drinking water violations?
Of the 12 most recent violations in EPA's records, 12 are health-based, and the most recent began in October 2024. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Southwest Ouachita Waterworks, Inc.'s water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. Of the 12 most recent violations in EPA's records, 12 are health-based, and the most recent began in October 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the LA state drinking water program.
Where can I find Southwest Ouachita Waterworks, Inc.'s water quality report?
As a community water system, Southwest Ouachita Waterworks, Inc. must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Ouachita Parish County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| City of Monroe Water System | Ouachita Parish | 57,000 | Community | Surface water |
| West Monroe Water System | Ouachita Parish | 16,005 | Community | Groundwater |
| West Hwy 80 Ark Road Ws | Ouachita Parish | 14,649 | Community | Groundwater |
| Gowc North Water System | Ouachita Parish | 13,287 | Community | Groundwater |
| Gowc East Water System | Ouachita Parish | 11,742 | Community | Groundwater |
| Cheniere Drew North Water System | Ouachita Parish | 11,280 | Community | Groundwater |
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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, “Southwest Ouachita Waterworks, Inc., PWSID LA1073047, Louisiana”, https://aquacensus.com/water-systems/louisiana/southwest-ouachita-waterworks-inc-la1073047 (data as of October 1, 2026).