Grand Coteau Water Quality
Louisiana
According to EPA SDWIS, Grand Coteau, Louisiana is served by 1 community water system covering about 1,650 people. The same extract lists 17 health-based violation records, most recently coded 0700 in 2025. Counts are historical EPA registry rows, not a current compliance or drinkability score.
Drinking water in Grand Coteau, Louisiana is delivered through 1 EPA-regulated community water system serving an estimated 1,650 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 17 violation records across the 1 active community system shown here. Monitoring and reporting records are not present in the extract. The records carry 2 distinct EPA contaminant codes: Groundwater Rule, LEAD AND COPPER RULE REVISIONS.
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 |
|---|---|---|---|
| TOWN OF GRAND COTEAU WATER SYSTEM | 1,650 | 17 | 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 |
|---|---|---|
| TOWN OF GRAND COTEAU WATER SYSTEM | Groundwater Rule | 2025-03-03 |
| TOWN OF GRAND COTEAU WATER SYSTEM | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| TOWN OF GRAND COTEAU WATER SYSTEM | Groundwater Rule | 2022-07-12 |
| TOWN OF GRAND COTEAU WATER SYSTEM | Groundwater Rule | 2022-07-12 |
| TOWN OF GRAND COTEAU WATER SYSTEM | Groundwater Rule | 2022-07-12 |
| TOWN OF GRAND COTEAU WATER SYSTEM | Groundwater Rule | 2022-07-12 |
| TOWN OF GRAND COTEAU WATER SYSTEM | Groundwater Rule | 2022-07-12 |
| TOWN OF GRAND COTEAU WATER SYSTEM | Groundwater Rule | 2022-07-12 |
| TOWN OF GRAND COTEAU WATER SYSTEM | Groundwater Rule | 2022-07-12 |
| TOWN OF GRAND COTEAU WATER SYSTEM | Groundwater Rule | 2022-07-12 |
| TOWN OF GRAND COTEAU WATER SYSTEM | Groundwater Rule | 2022-07-12 |
| TOWN OF GRAND COTEAU WATER SYSTEM | Groundwater Rule | 2020-06-15 |
| TOWN OF GRAND COTEAU WATER SYSTEM | Groundwater Rule | 2020-06-15 |
| TOWN OF GRAND COTEAU WATER SYSTEM | Groundwater Rule | 2020-06-15 |
| TOWN OF GRAND COTEAU WATER SYSTEM | Groundwater Rule | 2018-12-31 |
| TOWN OF GRAND COTEAU WATER SYSTEM | Groundwater Rule | 2018-12-31 |
| TOWN OF GRAND COTEAU WATER SYSTEM | Groundwater Rule | 2011-12-19 |
What are Grand Coteau's health-based records for?
Grand Coteau's health-based violation records carry 2 distinct EPA codes: some name a substance, others the drinking-water rule that was breached. Counts are records on file in the EPA SDWIS extract, not current test results.
| Contaminant | Records | Systems |
|---|---|---|
| Groundwater Rule | 16 | 1 |
| Lead and Copper Rule Revisions | 1 | 1 |
Frequently Asked Questions
What does EPA SDWIS list for drinking water in Grand Coteau, Louisiana? ▼
How many water violations does Grand Coteau have in this EPA extract? ▼
What contaminants were found in Grand Coteau water? ▼
How many water systems serve Grand Coteau? ▼
Where does Grand Coteau get its drinking water? ▼
How does Grand Coteau compare in Louisiana?
Of the 329 Louisiana places with at least one community water system on file, Grand Coteau ranks #225 by number of systems (1).
Either side of it: Gramercy (1), Grand Chenier (1), Grant (1), Greenwood (1)
About This Data
Figures here are the current EPA SDWIS extract joined to the 1 community water system whose service area lists Grand Coteau, 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.