Public water system · LA1097012
ActivePlaisance Water System
At a glance
Plaisance Water System (PWSID LA1097012) is an active community water system in St. Landry Parish County, Louisiana. It reports serving 6,465 people through 2,155 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, 4 are health-based, and the most recent began in July 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
6,465
Service connections
2,155
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Plaisance Water System compare with other water systems in St. Landry Parish County?
By EPA's size categories, Plaisance Water System is a medium system (3,301 to 10,000 people). St. Landry Parish County has 28 active public water systems, and Plaisance Water System is the 6th-largest of them by population served. Its population served is about 62% above the county average of 4,003 people per system, and accounts for 5.8% of the 112,071 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 Plaisance 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 Plaisance Water System?
EPA lists Plaisance 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. 10 of the 28 active systems in St. Landry Parish County (36%) are also privately owned.
Does Plaisance Water System have drinking water violations?
Of the 12 most recent violations in EPA's records, 4 are health-based, and the most recent began in July 2024. The violations listed here began between February 2013 and July 2024. By type: 5 monitoring and reporting, 3 public notice, recordkeeping or other, 2 required treatment not met and 2 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (3 of them). EPA lists 12 as resolved. 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.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2024-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2018-11-16 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Resolved |
| 2018-11-16 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Resolved |
| 2017-10-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2017-05-24 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2015-09-13 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2015-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2013-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2013-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2013-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2013-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2013-02-01 | Monitoring and reportingMonitoring, Repeat Major (TCR) · code 25 | Total coliform bacteria (TCR)code 3100 | 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.
Plaisance Water System: frequently asked questions
Who runs Plaisance Water System?
Plaisance Water System (PWSID LA1097012) is a community water system privately owned. It is regulated by the LA state drinking water program.
How many people does Plaisance Water System serve?
Plaisance Water System reports serving 6,465 people through 2,155 service connections in St. Landry Parish County, Louisiana.
Where does Plaisance 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 Plaisance Water System have any drinking water violations?
Of the 12 most recent violations in EPA's records, 4 are health-based, and the most recent began in July 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 Plaisance 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, 4 are health-based, and the most recent began in July 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 Plaisance Water System's water quality report?
As a community water system, Plaisance 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. Landry Parish County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| City of Opelousas Water System | St. Landry Parish | 20,388 | Community | Groundwater |
| Lawco - Eunice Water System | St. Landry Parish | 15,393 | Community | Groundwater |
| Town of Leonville Water System | St. Landry Parish | 9,552 | Community | Groundwater |
| Lewisburg Bellevue Water System | St. Landry Parish | 8,226 | Community | Groundwater |
| Savoy Swords Water System Inc. | St. Landry Parish | 7,326 | Community | Groundwater |
| Prairie Ronde Water System Inc. | St. Landry Parish | 6,090 | 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, “Plaisance Water System, PWSID LA1097012, Louisiana”, https://aquacensus.com/water-systems/louisiana/plaisance-water-system-la1097012 (data as of October 1, 2026).