C47/100
ST MARY WATER & SEWER COMM #3 — Water Quality Report 2026
Serving 7,500 people · Louisiana
Water Source
Surface Water
County
—
System ID
LA1101010
Violations
13
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.70 mg/L | 1.30 mg/L | Over Limit |
EPA Violation History
1
Violation (last 5yr)
1
Unresolved
1
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
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 ST MARY WATER & SEWER COMM #3
Is ST MARY WATER & SEWER COMM #3 water safe to drink?
ST MARY WATER & SEWER COMM #3 water receives a grade of C (47/100), which is considered fair. 1 contaminant(s) exceed EPA legal limits and 13 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has ST MARY WATER & SEWER COMM #3 detected?
32 contaminants were tested in ST MARY WATER & SEWER COMM #3's water. Notable contaminants include Copper (90th percentile). 1 exceed EPA legal limits (MCLs). 1 exceed EPA health goals (MCLGs).
Does ST MARY WATER & SEWER COMM #3 have any EPA violations?
Yes, ST MARY WATER & SEWER COMM #3 has 13 EPA violation(s) on record, with the most recent in 2025. Violation types include MCL, MR, Other. 8 are health-based violations.
How many people does ST MARY WATER & SEWER COMM #3 serve?
ST MARY WATER & SEWER COMM #3 serves approximately 7,500 people, Louisiana.
What type of water does ST MARY WATER & SEWER COMM #3 provide?
ST MARY WATER & SEWER COMM #3 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 LA1101010.
How does ST MARY WATER & SEWER COMM #3 compare to other utilities in Louisiana?
ST MARY WATER & SEWER COMM #3 scores 47/100 with a grade of C (fair). This score indicates room for improvement compared to other utilities. Visit our Louisiana state page for a full comparison of water systems.