Public water system · LA1011001
ActiveCity of Deridder Water System
At a glance
City of Deridder Water System (PWSID LA1011001) is an active community water system in Beauregard Parish County, Louisiana. It reports serving 14,400 people through 4,800 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 7 violations for this system; 4 are health-based, and the most recent began in October 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
14,400
Service connections
4,800
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does City of Deridder Water System compare with other water systems in Beauregard Parish County?
By EPA's size categories, City of Deridder Water System is a large system (10,001 to 100,000 people). Beauregard Parish County has 8 active public water systems, and City of Deridder Water System is the 2nd-largest of them by population served. Its population served is about 138% above the county average of 6,058 people per system, and accounts for 30% of the 48,460 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 Deridder Water System is about twice 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 Deridder Water System?
EPA lists City of Deridder 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. 6 of the 8 active systems in Beauregard Parish County (75%) are also owned by a local government.
Does City of Deridder Water System have drinking water violations?
EPA's records list 7 violations for this system; 4 are health-based, and the most recent began in October 2024. The violations listed here began between July 1994 and October 2024. By type: 3 contaminant level above the legal limit, 1 required treatment not met, 1 monitoring, 1 monitoring and reporting and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Total coliform bacteria (TCR) (3 of them). EPA lists 5 as resolved and 2 as archived. 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.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2024-10-17 | Required treatment not metLSL Inventory · code 2E | Lead and Copper Rule Revisionscode 5200 | Yes | Resolved |
| 2016-05-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2015-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2013-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2008-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2002-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1994-07-15 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
All 7 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 Deridder Water System: frequently asked questions
Who runs City of Deridder Water System?
City of Deridder Water System (PWSID LA1011001) 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 Deridder Water System serve?
City of Deridder Water System reports serving 14,400 people through 4,800 service connections in Beauregard Parish County, Louisiana.
Where does City of Deridder 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 Deridder Water System have any drinking water violations?
EPA's records list 7 violations for this system; 4 are health-based, and the most recent began in October 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 City of Deridder 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. EPA's records list 7 violations for this system; 4 are health-based, and the most recent began in October 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 City of Deridder Water System's water quality report?
As a community water system, City of Deridder 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 Beauregard Parish County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Beauregard Water Works Dist #3 | Beauregard Parish | 24,000 | Community | Groundwater |
| Beauregard District No 2 Ward No 5 | Beauregard Parish | 6,613 | Community | Groundwater |
| Town of Merryville Water System | Beauregard Parish | 1,107 | Community | Groundwater |
| Beauregard Waterworks District No. 6 | Beauregard Parish | 993 | Community | Groundwater |
| Beauregard Water District #5 | Beauregard Parish | 672 | Community | Groundwater |
| Packaging Corp of America - Deridder | Beauregard Parish | 650 | Non-transient non-community | Groundwater |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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 Deridder Water System, PWSID LA1011001, Louisiana”, https://aquacensus.com/water-systems/louisiana/city-of-deridder-water-system-la1011001 (data as of October 1, 2026).