F0/100
CITY OF OPELOUSAS WATER SYSTEM — Water Quality Report 2026
Serving 20,388 people · Louisiana
Water Source
Groundwater
County
—
System ID
LA1097010
Violations
30
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.002 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
8
Violations (last 5yr)
1
Unresolved
6
Health-Related
TIER 2Unresolved
Violation related to Consumer Confidence Report
When: April 2, 2025Rule: Consumer Confidence RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 3Resolved
Disinfection byproduct treatment technique failure
When: July 17, 2024 – January 30, 2025Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2024 – June 13, 2025Enforcement: Resolving — corrective action underway
TIER 2Resolved
Violation related to Consumer Confidence Report
When: June 4, 2024 – February 19, 2025Rule: Consumer Confidence RuleEnforcement: Resolving — corrective action underway
TIER 2Resolved
Violation related to Consumer Confidence Report
When: October 27, 2021 – February 1, 2023Rule: Consumer Confidence RuleEnforcement: Formal — state order issued
TIER 2Resolved
Violation related to Consumer Confidence Report
When: October 27, 2021Rule: Consumer Confidence RuleEnforcement: Formal — state order issued
TIER 2Resolved
Violation related to Consumer Confidence Report
When: October 27, 2021Rule: Consumer Confidence RuleEnforcement: Formal — state order issued
TIER 2Resolved
Violation related to Consumer Confidence Report
When: October 27, 2021 – February 1, 2023Rule: Consumer Confidence RuleEnforcement: Formal — state order issued
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 CITY OF OPELOUSAS WATER SYSTEM
Is CITY OF OPELOUSAS WATER SYSTEM water safe to drink?
CITY OF OPELOUSAS WATER SYSTEM water receives a grade of F (0/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 30 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has CITY OF OPELOUSAS WATER SYSTEM detected?
66 contaminants were tested in CITY OF OPELOUSAS WATER SYSTEM's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does CITY OF OPELOUSAS WATER SYSTEM have any EPA violations?
Yes, CITY OF OPELOUSAS WATER SYSTEM has 30 EPA violation(s) on record, with the most recent in 2025. Violation types include TT, Other, MR. 19 are health-based violations.
How many people does CITY OF OPELOUSAS WATER SYSTEM serve?
CITY OF OPELOUSAS WATER SYSTEM serves approximately 20,388 people, Louisiana.
What type of water does CITY OF OPELOUSAS WATER SYSTEM provide?
CITY OF OPELOUSAS WATER SYSTEM sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is LA1097010.
How does CITY OF OPELOUSAS WATER SYSTEM compare to other utilities in Louisiana?
CITY OF OPELOUSAS 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.