D24/100
WATER & SEWER COMMISSION 4 OF ST MARY — Water Quality Report 2026
Serving 9,709 people · Louisiana
Water Source
Surface Water
County
—
System ID
LA1101011
Violations
16
Contaminant Test Results
EPA Violation History
5
Violations (last 5yr)
5
Unresolved
5
Health-Related
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
When: January 1, 2025 – March 31, 2025Rule: Stage 2 DBPREnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
When: October 1, 2024 – December 31, 2024Rule: Stage 2 DBPREnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
When: July 1, 2024 – September 30, 2024Rule: Stage 2 DBPREnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
When: July 1, 2024 – September 30, 2024Rule: Stage 2 DBPREnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
When: October 1, 2023 – December 31, 2023Rule: Stage 2 DBPREnforcement: Informal — resolved cooperativelyVerify on EPA.gov
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 WATER & SEWER COMMISSION 4 OF ST MARY
Is WATER & SEWER COMMISSION 4 OF ST MARY water safe to drink?
WATER & SEWER COMMISSION 4 OF ST MARY water receives a grade of D (24/100), which is considered poor. 0 contaminant(s) exceed EPA legal limits and 16 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has WATER & SEWER COMMISSION 4 OF ST MARY detected?
31 contaminants were tested in WATER & SEWER COMMISSION 4 OF ST MARY's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does WATER & SEWER COMMISSION 4 OF ST MARY have any EPA violations?
Yes, WATER & SEWER COMMISSION 4 OF ST MARY has 16 EPA violation(s) on record, with the most recent in 2025. Violation types include MCL, TT, MR. 15 are health-based violations.
How many people does WATER & SEWER COMMISSION 4 OF ST MARY serve?
WATER & SEWER COMMISSION 4 OF ST MARY serves approximately 9,709 people, Louisiana.
What type of water does WATER & SEWER COMMISSION 4 OF ST MARY provide?
WATER & SEWER COMMISSION 4 OF ST MARY sources its water from surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is LA1101011.
How does WATER & SEWER COMMISSION 4 OF ST MARY compare to other utilities in Louisiana?
WATER & SEWER COMMISSION 4 OF ST MARY scores 24/100 with a grade of D (poor). This score suggests significant water quality concerns relative to other utilities. Visit our Louisiana state page for a full comparison of water systems.