Sulphur Water Quality
Louisiana
According to EPA SDWIS, Sulphur, Louisiana is served by 3 community water systems covering about 45,906 people. The same extract lists 6 health-based violation records, most recently coded 0700 in 2023. Counts are historical EPA registry rows, not a current compliance or drinkability score.
Drinking water in Sulphur, Louisiana is delivered through 3 EPA-regulated community water systems serving an estimated 45,906 people. Each system is tracked in the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act, which requires testing for regulated contaminants, consumer notification of violations, and publication of an annual Consumer Confidence Report.
PlainEnviro's health-based SDWIS extract shows 6 violation records across the 3 active community systems shown here. Monitoring and reporting records are not present in the extract. The records carry 1 distinct EPA contaminant code: Groundwater Rule. 15 TRI-reporting industrial facilities are also located within the city limits.
A past EPA health-based registry row does not describe water delivered today or current compliance status; utilities notify customers and remediate under state primacy oversight when required. For current water-quality status and treatment practices, review your local utility's most recent Consumer Confidence Report or contact the Louisiana drinking water program. All records above reflect federal EPA SDWIS data and are not independently verified against state databases.
Community Water Systems
| System Name | Pop. Served | Violations | Status |
|---|---|---|---|
| SULPHUR CITY OF WATER SYSTEM | 24,489 | 2 | Health |
| CALCASIEU PARISH WW DIST 9 CARLYSS | 14,502 | 1 | Health |
| HOUSTON RIVER WATERWORKS DISTRICT 11 | 6,915 | 3 | Health |
Does this city have health-based water violations?
These health-based records can represent Maximum Contaminant Level (MCL), Treatment Technique (TT), or Maximum Residual Disinfectant Level (MRDL) categories. A historical record does not establish that water is currently unsafe.
| Water system | Contaminant | Begin Date |
|---|---|---|
| HOUSTON RIVER WATERWORKS DISTRICT 11 | Groundwater Rule | 2023-10-05 |
| HOUSTON RIVER WATERWORKS DISTRICT 11 | Groundwater Rule | 2023-10-05 |
| HOUSTON RIVER WATERWORKS DISTRICT 11 | Groundwater Rule | 2023-10-05 |
| SULPHUR CITY OF WATER SYSTEM | Groundwater Rule | 2020-01-01 |
| SULPHUR CITY OF WATER SYSTEM | Groundwater Rule | 2020-01-01 |
| CALCASIEU PARISH WW DIST 9 CARLYSS | Groundwater Rule | 2013-01-15 |
What are Sulphur's health-based records for?
Every health-based violation record in Sulphur carries one EPA contaminant or rule code. Counts are records on file in the EPA SDWIS extract, not current test results.
| Contaminant | Records | Systems |
|---|---|---|
| Groundwater Rule | 6 | 3 |
TRI Facilities in Sulphur
| Facility | Total Releases |
|---|---|
| Chemical Waste Management - la Ke Charles Facility | 25.7M lbs |
| Citgo Petroleum Corp | 8.7M lbs |
| W R Grace & Co-Conn Grace | 4.7M lbs |
| Westlake Polymers LLC | 2.2M lbs |
| Westlake Petrochemicals Ethylene | 1.0M lbs |
| Firestone Polymers LLC | 461.3K lbs |
| Boardwalk Louisiana Midstream LLC | 233.6K lbs |
| Rain Cii Carbon LLC Lake Charles Calcining Plant (lccp) | 101.2K lbs |
| Westlake Styrene LLC - Styrene Marine Terminal | 45.4K lbs |
| Phillips 66 Co Gulf Coast Lubes Plant | 9.6K lbs |
Frequently Asked Questions
What does EPA SDWIS list for drinking water in Sulphur, Louisiana? ▼
How many water violations does Sulphur have in this EPA extract? ▼
What contaminants were found in Sulphur water? ▼
How many water systems serve Sulphur? ▼
Where does Sulphur get its drinking water? ▼
Are there pollution sources near Sulphur? ▼
How does Sulphur compare in Louisiana?
Of the 329 Louisiana places with at least one community water system on file, Sulphur ranks #90 by number of systems (3).
Either side of it: Simsboro (3), Springfield (3), Sunset (3), Youngsville (3)
About This Data
Figures here are the current EPA SDWIS extract joined to the 3 community water systems whose service area lists Sulphur, ranked against the 329 Louisiana places with at least one system on file. Data current as of 2026-08-25.
Water system data comes from the EPA's Safe Drinking Water Information System (SDWIS). PlainEnviro's violation fetch is restricted upstream to records EPA flags as health-based and then joined to active community water systems. Monitoring and reporting violations are not included.
A health-based violation row in this extract is a historical EPA registry entry. It does not describe water delivered today or current compliance status. Many records are later resolved, and public water systems notify customers when required. For current conditions, contact your local water utility or the state drinking water program.
TRI facility data comes from the EPA Toxic Release Inventory. Facilities shown are those that self-report to the TRI program. PlainEnviro presents this data without advocacy framing.
Read our methodology - how this data is sourced, computed, and verified.