Public water system · LA1019053
ActiveCalcasieu Parish Ww District No 4
At a glance
Calcasieu Parish Ww District No 4 (PWSID LA1019053) is an active community water system in Calcasieu Parish County, Louisiana. It reports serving 5,340 people through 1,780 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, 8 are health-based, and the most recent began in December 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
5,340
Service connections
1,780
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Calcasieu Parish Ww District No 4 compare with other water systems in Calcasieu Parish County?
By EPA's size categories, Calcasieu Parish Ww District No 4 is a medium system (3,301 to 10,000 people). Calcasieu Parish County has 72 active public water systems. Its population served is about 80% above the county average of 2,962 people per system, and accounts for 2.5% of the 213,234 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 Calcasieu Parish Ww District No 4 is about 20% 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 Calcasieu Parish Ww District No 4?
EPA lists Calcasieu Parish Ww District No 4 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. 19 of the 72 active systems in Calcasieu Parish County (26%) are also owned by a local government.
Does Calcasieu Parish Ww District No 4 have drinking water violations?
Of the 12 most recent violations in EPA's records, 8 are health-based, and the most recent began in December 2025. The violations listed here began between May 2006 and December 2025. By type: 7 required treatment not met, 2 public notice, recordkeeping or other, 1 reporting, 1 monitoring and reporting and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Groundwater Rule (6 of them). EPA lists 8 as unaddressed and 4 as resolved. Unaddressed means the violation is not resolved or archived and is not yet 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.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2025-12-06 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Unaddressed |
| 2025-10-28 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Unaddressed |
| 2025-10-28 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Unaddressed |
| 2025-10-28 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Unaddressed |
| 2025-10-28 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Unaddressed |
| 2025-10-28 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Unaddressed |
| 2024-10-17 | Required treatment not metLSL Inventory · code 2E | Lead and Copper Rule Revisionscode 5200 | Yes | Unaddressed |
| 2024-10-17 | ReportingLSL Reporting · code 4G | Lead and Copper Rule Revisionscode 5200 | No | Unaddressed |
| 2023-08-11 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2023-07-03 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Resolved |
| 2019-01-12 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2006-05-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | 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.
Calcasieu Parish Ww District No 4: frequently asked questions
Who runs Calcasieu Parish Ww District No 4?
Calcasieu Parish Ww District No 4 (PWSID LA1019053) is a community water system owned by a local government. It is regulated by the LA state drinking water program.
How many people does Calcasieu Parish Ww District No 4 serve?
Calcasieu Parish Ww District No 4 reports serving 5,340 people through 1,780 service connections in Calcasieu Parish County, Louisiana.
Where does Calcasieu Parish Ww District No 4 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 Calcasieu Parish Ww District No 4 have any drinking water violations?
Of the 12 most recent violations in EPA's records, 8 are health-based, and the most recent began in December 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 Calcasieu Parish Ww District No 4'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, 8 are health-based, and the most recent began in December 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 Calcasieu Parish Ww District No 4's water quality report?
As a community water system, Calcasieu Parish Ww District No 4 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 Calcasieu Parish County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| City of Lake Charles Water System | Calcasieu Parish | 79,500 | Community | Groundwater |
| Sulphur City of Water System | Calcasieu Parish | 24,489 | Community | Groundwater |
| Calcasieu Parish Ww District No 1 | Calcasieu Parish | 20,837 | Community | Groundwater |
| Calcasieu Parish Ww Dist 9 Carlyss | Calcasieu Parish | 14,502 | Community | Groundwater |
| Houston River Waterworks District 11 | Calcasieu Parish | 6,915 | Community | Groundwater |
| Calcasieu Parish Ww District 8 | Calcasieu Parish | 6,834 | 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, “Calcasieu Parish Ww District No 4, PWSID LA1019053, Louisiana”, https://aquacensus.com/water-systems/louisiana/calcasieu-parish-ww-district-no-4-la1019053 (data as of October 1, 2026).