Public water system · LA1099004
ActiveSt Martin Water District 4 - Catahoula
At a glance
St Martin Water District 4 - Catahoula (PWSID LA1099004) is an active community water system in St. Martin Parish County, Louisiana. It reports serving 3,000 people through 1,000 service connections. Its primary water source is purchased groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 8 are health-based, and the most recent began in July 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
3,000
Service connections
1,000
Primary source
GWP
Purchased groundwater
System type
CWS
Community water system
System record
How does St Martin Water District 4 - Catahoula compare with other water systems in St. Martin Parish County?
By EPA's size categories, St Martin Water District 4 - Catahoula is a small system (501 to 3,300 people). St. Martin Parish County has 24 active public water systems. Its population served is roughly in line with the county average of 3,304 people per system, and accounts for 3.8% of the 79,285 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 St Martin Water District 4 - Catahoula is about 55% below 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. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own. 69 Louisiana systems (6.2%) list purchased groundwater as their primary source.
Who owns and regulates St Martin Water District 4 - Catahoula?
EPA lists St Martin Water District 4 - Catahoula as owned by a local government. 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. 8 of the 24 active systems in St. Martin Parish County (33%) are also owned by a local government.
Does St Martin Water District 4 - Catahoula have drinking water violations?
Of the 12 most recent violations in EPA's records, 8 are health-based, and the most recent began in July 2025. The violations listed here began between March 2014 and July 2025. By type: 7 contaminant level above the legal limit, 3 public notice, recordkeeping or other, 1 monitoring and reporting and 1 required treatment not met. The contaminant or rule involved most often is Arsenic (6 of them). EPA lists 6 as resolved, 5 as archived and 1 as unaddressed. 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. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2025-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Archived |
| 2025-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Archived |
| 2025-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Archived |
| 2024-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Archived |
| 2024-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Archived |
| 2022-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2021-01-17 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Unaddressed |
| 2020-06-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, E. coli (RTCR) · code 1A | Revised Total Coliform Rulecode 8000 | Yes | Resolved |
| 2018-09-19 | Required treatment not metTreatment Technique, Level 1 Assessment (RTCR) · code 2A | Revised Total Coliform Rulecode 8000 | Yes | Resolved |
| 2017-10-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2015-10-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2014-03-19 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | 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.
St Martin Water District 4 - Catahoula: frequently asked questions
Who runs St Martin Water District 4 - Catahoula?
St Martin Water District 4 - Catahoula (PWSID LA1099004) is a community water system owned by a local government. It is regulated by the LA state drinking water program.
How many people does St Martin Water District 4 - Catahoula serve?
St Martin Water District 4 - Catahoula reports serving 3,000 people through 1,000 service connections in St. Martin Parish County, Louisiana.
Where does St Martin Water District 4 - Catahoula get its water?
EPA SDWIS lists this system's primary water source as purchased groundwater. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own.
Does St Martin Water District 4 - Catahoula have any drinking water violations?
Of the 12 most recent violations in EPA's records, 8 are health-based, and the most recent began in July 2025. 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 St Martin Water District 4 - Catahoula'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, 8 are health-based, and the most recent began in July 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the LA state drinking water program.
Where can I find St Martin Water District 4 - Catahoula's water quality report?
As a community water system, St Martin Water District 4 - Catahoula 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 St. Martin Parish County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Village of Parks Water System | St. Martin Parish | 12,801 | Community | Groundwater |
| Cecilia Water Corporation | St. Martin Parish | 12,420 | Community | Groundwater |
| Bayou Teche Water Works | St. Martin Parish | 10,137 | Community | Groundwater |
| City of Breaux Bridge Water System | St. Martin Parish | 10,098 | Community | Groundwater |
| City of St Martinville Water System | St. Martin Parish | 7,263 | Community | Groundwater |
| Henderson Nina Water System Inc. | St. Martin Parish | 5,535 | 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, “St Martin Water District 4 - Catahoula, PWSID LA1099004, Louisiana”, https://aquacensus.com/water-systems/louisiana/st-martin-water-district-4-catahoula-la1099004 (data as of October 1, 2026).