Public water system · LA1099007
ActiveCity of St Martinville Water System
At a glance
City of St Martinville Water System (PWSID LA1099007) is an active community water system in St. Martin Parish County, Louisiana. It reports serving 7,263 people through 2,421 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 12 are health-based, and the most recent began in November 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
7,263
Service connections
2,421
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does City of St Martinville Water System compare with other water systems in St. Martin Parish County?
By EPA's size categories, City of St Martinville Water System is a medium system (3,301 to 10,000 people). St. Martin Parish County has 24 active public water systems, and City of St Martinville Water System is the 5th-largest of them by population served. Its population served is about twice the county average of 3,304 people per system, and accounts for 9.2% 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 City of St Martinville Water System is roughly in line with 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 City of St Martinville Water System?
EPA lists City of St Martinville Water System 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 City of St Martinville Water System have drinking water violations?
Of the 12 most recent violations in EPA's records, 12 are health-based, and the most recent began in November 2025. The violations listed here began between January 2015 and November 2025. By type: 6 required treatment not met and 6 contaminant level above the legal limit. The contaminant or rule involved most often is Total trihalomethanes (TTHM) (6 of them). EPA lists 9 as resolved and 3 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. 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 |
|---|---|---|---|---|
| 2025-11-05 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Unaddressed |
| 2025-11-05 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Resolved |
| 2024-10-17 | Required treatment not metLSL Inventory · code 2E | Lead and Copper Rule Revisionscode 5200 | Yes | Resolved |
| 2023-11-27 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Resolved |
| 2023-11-27 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Unaddressed |
| 2023-02-24 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Unaddressed |
| 2021-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2016-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2015-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2015-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2015-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2015-01-01 | 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.
City of St Martinville Water System: frequently asked questions
Who runs City of St Martinville Water System?
City of St Martinville Water System (PWSID LA1099007) is a community water system owned by a local government. It is regulated by the LA state drinking water program.
How many people does City of St Martinville Water System serve?
City of St Martinville Water System reports serving 7,263 people through 2,421 service connections in St. Martin Parish County, Louisiana.
Where does City of St Martinville Water System 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 City of St Martinville Water System 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 November 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 City of St Martinville Water System'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 November 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 City of St Martinville Water System's water quality report?
As a community water system, City of St Martinville Water System 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 |
| Henderson Nina Water System Inc. | St. Martin Parish | 5,535 | Community | Groundwater |
| United Water System | St. Martin Parish | 4,446 | 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, “City of St Martinville Water System, PWSID LA1099007, Louisiana”, https://aquacensus.com/water-systems/louisiana/city-of-st-martinville-water-system-la1099007 (data as of October 1, 2026).