D25/100
Coushatta Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 11,217 residents · Louisiana
What's In Coushatta's Tap Water?
31
Contaminants Tested
0
Exceed EPA Limits
1
Above EPA Goals
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
7
Violations (last 5yr)
3
Unresolved
7
Health-Related
TIER 2Unresolved
Violation related to Consumer Confidence Report
When: May 25, 2025Rule: Consumer Confidence RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 2Unresolved
Violation related to Consumer Confidence Report
When: May 25, 2025Rule: Consumer Confidence RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 2Unresolved
Violation related to Consumer Confidence Report
When: May 25, 2025Rule: Consumer Confidence RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 2Resolved
Violation related to Consumer Confidence Report
When: January 18, 2023 – January 26, 2023Rule: Consumer Confidence RuleEnforcement: Resolving — corrective action underway
TIER 2Resolved
Violation related to Consumer Confidence Report
When: January 18, 2023 – February 16, 2023Rule: Consumer Confidence RuleEnforcement: Resolving — corrective action underway
TIER 2Resolved
Violation related to Consumer Confidence Report
When: January 18, 2023 – February 16, 2023Rule: Consumer Confidence RuleEnforcement: Resolving — corrective action underway
TIER 2Resolved
Violation related to Consumer Confidence Report
When: October 2, 2021 – September 8, 2022Rule: Consumer Confidence 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
Water Utility Details
SLIGO WATER SYSTEM INCORPORATED
Population Served
2,850
Water Source
Groundwater
System ID
LA1015044
COUSHATTA WATER SYSTEM
Population Served
3,300
Water Source
Groundwater
System ID
LA1081001
MARTIN WATER SYSTEM
Population Served
1,350
Water Source
Groundwater
System ID
LA1081006
BAYOU PIERRE WATER SYSTEM
Population Served
1,371
Water Source
Groundwater
System ID
LA1081008
FAIRVIEW UNION WATER SYSTEM
Population Served
2,346
Water Source
Surface Water
System ID
LA1081012
Frequently Asked Questions About Coushatta Water
Is Coushatta tap water safe to drink?
Coushatta, Louisiana tap water receives a grade of D (25/100), which is considered poor. 1 contaminant(s) exceed EPA maximum contaminant levels and 327 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.
What contaminants are in Coushatta's water?
Of the 32 contaminants tested in Coushatta's water supply, the most notable include Copper (90th percentile), Lead (90th percentile). 1 contaminant(s) exceed EPA legal limits (MCLs). 2 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Coushatta have any water quality violations?
Yes, Coushatta has 327 EPA violation(s) on record, with the most recent in 2025. Violation types include MCL, TT, RPT. 185 of these are health-based violations, which are the most serious category.
Do I need a water filter in Coushatta?
Based on EPA data, using a water filter in Coushatta is recommended. 1 contaminant(s) exceed legal limits. An NSF-certified filter — such as a reverse osmosis or activated carbon system — can effectively reduce many common contaminants. Choose a filter certified to remove the specific contaminants found in your area.
Where does Coushatta's tap water come from?
Coushatta's drinking water is sourced from groundwater and supplied by SLIGO WATER SYSTEM INCORPORATED and 4 other water system(s). The system serves approximately 11,217 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is Coushatta's water tested?
Under the Safe Drinking Water Act (SDWA), water utilities are required to regularly test for over 90 contaminants. Testing frequency varies by contaminant — some are tested monthly, others quarterly or annually. Coushatta's water systems must report results to the EPA and publish an annual Consumer Confidence Report (CCR). The data on this page reflects the latest available EPA testing data.
How does Coushatta's water compare to other cities in Louisiana?
Coushatta's water quality score of 25/100 earns a grade of D, which is considered poor. This is a concerning score that suggests significant water quality issues. Visit our Louisiana state page to see how all cities in the state compare.
What should I do if I'm concerned about Coushatta's water quality?
If you have concerns about Coushatta's tap water, consider these steps: (1) Request your utility's annual Consumer Confidence Report for detailed local data. (2) Get your water independently tested through a state-certified laboratory. (3) Consider an NSF-certified water filter rated for the contaminants found in your area. (4) Contact your water utility (SLIGO WATER SYSTEM INCORPORATED) with specific questions. (5) Report water quality issues to your state drinking water program or the EPA Safe Drinking Water Hotline at 800-426-4791.