F0/100

TOWN OF GRAND COTEAU WATER SYSTEM — Water Quality Report 2026

Serving 1,650 people · Louisiana

Water Source
Groundwater
County
System ID
LA1097001
Violations
47

Contaminant Test Results

2 contaminants above EPA health goals
ContaminantDetectedLimit (MCL)Status
Copper (90th percentile)
2.00 mg/L1.30 mg/LOver Limit
Lead (90th percentile)
0.007 mg/L0.015 mg/LAbove Goal

EPA Violation History

17

Violations (last 5yr)

6

Unresolved

10

Health-Related

TIER 2Resolved

Violation related to Consumer Confidence Report

When: March 3, 2025Rule: Consumer Confidence RuleEnforcement: Formal — state order issued
TIER 3Resolved

Failed to issue ongoing public notification

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: January 1, 2025 – May 6, 2025Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Unresolved

Reporting violation

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: October 17, 2024Rule: Ground Water RuleVerify on EPA.gov
TIER 2Unresolved

Treatment technique violation

When: October 17, 2024Rule: Ground Water RuleVerify on EPA.gov
TIER 3Resolved

Monitoring / Reporting Violation

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: September 4, 2024 – February 4, 2025Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved

Surface water treatment technique failure

When: July 1, 2023 – March 1, 2024Enforcement: Resolving — corrective action underway
TIER 3Resolved

Disinfection byproduct treatment technique failure

When: August 17, 2022 – December 19, 2024Rule: Ground Water RuleEnforcement: Formal — state order issued
TIER 2Resolved

Violation related to Consumer Confidence Report

When: July 12, 2022 – March 27, 2025Rule: Consumer Confidence RuleEnforcement: Formal — state order issued
TIER 2Resolved

Violation related to Consumer Confidence Report

When: July 12, 2022Rule: Consumer Confidence RuleEnforcement: Formal — state order issued
TIER 2Unresolved

Violation related to Consumer Confidence Report

When: July 12, 2022Rule: Consumer Confidence RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 2Unresolved

Violation related to Consumer Confidence Report

When: July 12, 2022Rule: Consumer Confidence RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 2Resolved

Violation related to Consumer Confidence Report

When: July 12, 2022Rule: Consumer Confidence RuleEnforcement: Formal — state order issued
TIER 2Unresolved

Violation related to Consumer Confidence Report

When: July 12, 2022Rule: Consumer Confidence RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 2Resolved

Violation related to Consumer Confidence Report

When: July 12, 2022Rule: Consumer Confidence RuleEnforcement: Formal — state order issued
TIER 2Unresolved

Violation related to Consumer Confidence Report

When: July 12, 2022Rule: Consumer Confidence RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 3Resolved

Surface water treatment technique failure

When: July 1, 2021 – November 24, 2021Enforcement: Resolving — corrective action underway
TIER 3Resolved

Monitoring / Reporting Violation

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: April 17, 2021 – May 21, 2021Rule: Ground Water RuleEnforcement: Resolving — corrective action underway

Understanding violation severity

Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.

Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly

Frequently Asked Questions About TOWN OF GRAND COTEAU WATER SYSTEM

Is TOWN OF GRAND COTEAU WATER SYSTEM water safe to drink?

TOWN OF GRAND COTEAU WATER SYSTEM water receives a grade of F (0/100), which is considered failing. 1 contaminant(s) exceed EPA legal limits and 47 violation(s) are on record. Customers may want to consider using a water filter.

What contaminants has TOWN OF GRAND COTEAU WATER SYSTEM detected?

2 contaminants were tested in TOWN OF GRAND COTEAU WATER SYSTEM's water. Notable contaminants include Copper (90th percentile), Lead (90th percentile). 1 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).

Does TOWN OF GRAND COTEAU WATER SYSTEM have any EPA violations?

Yes, TOWN OF GRAND COTEAU WATER SYSTEM has 47 EPA violation(s) on record, with the most recent in 2025. Violation types include TT, MR, RPT. 21 are health-based violations.

How many people does TOWN OF GRAND COTEAU WATER SYSTEM serve?

TOWN OF GRAND COTEAU WATER SYSTEM serves approximately 1,650 people, Louisiana.

What type of water does TOWN OF GRAND COTEAU WATER SYSTEM provide?

TOWN OF GRAND COTEAU WATER SYSTEM sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is LA1097001.

How does TOWN OF GRAND COTEAU WATER SYSTEM compare to other utilities in Louisiana?

TOWN OF GRAND COTEAU WATER SYSTEM scores 0/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our Louisiana state page for a full comparison of water systems.