Public water system · LA1097010
ActiveCity of Opelousas Water System
At a glance
City of Opelousas Water System (PWSID LA1097010) is an active community water system in St. Landry Parish County, Louisiana. It reports serving 20,388 people through 6,790 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, 7 are health-based, and the most recent began in April 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
20,388
Service connections
6,790
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does City of Opelousas Water System compare with other water systems in St. Landry Parish County?
By EPA's size categories, City of Opelousas Water System is a large system (10,001 to 100,000 people). St. Landry Parish County has 28 active public water systems, and City of Opelousas Water System is the largest of them by population served. Its population served is about 5.1 times the county average of 4,003 people per system, and accounts for 18% 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 City of Opelousas Water System is about 3 times 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 Opelousas Water System?
EPA lists City of Opelousas 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. 18 of the 28 active systems in St. Landry Parish County (64%) are also owned by a local government.
Does City of Opelousas 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 July 2015 and April 2025. By type: 7 required treatment not met, 4 public notice, recordkeeping or other and 1 monitoring and reporting. The contaminant or rule involved most often is Groundwater Rule (7 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 |
|---|---|---|---|---|
| 2025-04-02 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Resolved |
| 2024-07-17 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2024-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2024-06-04 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Resolved |
| 2021-10-27 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Resolved |
| 2021-10-27 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Resolved |
| 2021-10-27 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Resolved |
| 2021-10-27 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Resolved |
| 2019-08-22 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Resolved |
| 2018-06-08 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2016-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2015-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | 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.
City of Opelousas Water System: frequently asked questions
Who runs City of Opelousas Water System?
City of Opelousas Water System (PWSID LA1097010) 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 Opelousas Water System serve?
City of Opelousas Water System reports serving 20,388 people through 6,790 service connections in St. Landry Parish County, Louisiana.
Where does City of Opelousas 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 Opelousas 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 City of Opelousas 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 City of Opelousas Water System's water quality report?
As a community water system, City of Opelousas 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 |
|---|---|---|---|---|
| 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 |
| Plaisance Water System | St. Landry Parish | 6,465 | 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, “City of Opelousas Water System, PWSID LA1097010, Louisiana”, https://aquacensus.com/water-systems/louisiana/city-of-opelousas-water-system-la1097010 (data as of October 1, 2026).