Public water system · LA1015023
ActiveSt Marys Water System
At a glance
St Marys Water System (PWSID LA1015023) is an active community water system in Bossier Parish County, Louisiana. It reports serving 294 people through 98 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, 7 are health-based, and the most recent began in April 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
294
Service connections
98
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does St Marys Water System compare with other water systems in Bossier Parish County?
By EPA's size categories, St Marys Water System is a very small system (500 people or fewer). Bossier Parish County has 26 active public water systems. Its population served is well below the county average of 5,412 people per system, and accounts for 0.2% of the 140,710 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 Marys Water System is well 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. 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 St Marys Water System?
EPA lists St Marys Water System 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. 17 of the 26 active systems in Bossier Parish County (65%) are also privately owned.
Does St Marys Water System have drinking water violations?
Of the 12 most recent violations in EPA's records, 7 are health-based, and the most recent began in April 2025. The violations listed here began between March 2023 and April 2025. By type: 6 required treatment not met, 3 public notice, recordkeeping or other, 1 contaminant level above the legal limit, 1 monitoring and reporting and 1 reporting. The contaminant or rule involved most often is Groundwater Rule (5 of them). EPA lists 5 as addressed, 4 as resolved and 3 as unaddressed. Addressed means the violation is not resolved or archived and is covered by formal enforcement. 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 |
|---|---|---|---|---|
| 2025-04-29 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2025-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2024-12-20 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2024-10-17 | ReportingLSL Reporting · code 4G | Lead and Copper Rule Revisionscode 5200 | No | Addressed |
| 2024-10-17 | Required treatment not metLSL Inventory · code 2E | Lead and Copper Rule Revisionscode 5200 | Yes | Addressed |
| 2023-05-04 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2023-04-21 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Addressed |
| 2023-03-23 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Unaddressed |
| 2023-03-23 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Addressed |
| 2023-03-23 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Unaddressed |
| 2023-03-23 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Unaddressed |
| 2023-03-23 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Addressed |
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 Marys Water System: frequently asked questions
Who runs St Marys Water System?
St Marys Water System (PWSID LA1015023) is a community water system privately owned. It is regulated by the LA state drinking water program.
How many people does St Marys Water System serve?
St Marys Water System reports serving 294 people through 98 service connections in Bossier Parish County, Louisiana.
Where does St Marys 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 St Marys Water System have any drinking water violations?
Of the 12 most recent violations in EPA's records, 7 are health-based, and the most recent began in April 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 Marys 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, 7 are health-based, and the most recent began in April 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 Marys Water System's water quality report?
As a community water system, St Marys 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 Bossier Parish County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| City of Bossier City Water System | Bossier Parish | 79,506 | Community | Surface water |
| Barksdale Afb Water System | Bossier Parish | 13,000 | Community | Purchased surface water |
| Village Water System | Bossier Parish | 10,890 | Community | Groundwater |
| Town of Benton Water System | Bossier Parish | 8,037 | Community | Purchased surface water |
| Cypress Black Bayou Water System | Bossier Parish | 5,520 | Community | Purchased surface water |
| Town of Haughton Water System | Bossier Parish | 5,355 | 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 Marys Water System, PWSID LA1015023, Louisiana”, https://aquacensus.com/water-systems/louisiana/st-marys-water-system-la1015023 (data as of October 1, 2026).