F19/100
Gueydan Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 2,016 residents · Louisiana
What's In Gueydan's Tap Water?
2
Contaminants Tested
1
Exceed EPA Limits
1
Above EPA Goals
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.50 mg/L | 1.30 mg/L | Over Limit |
Lead (90th percentile) | 0.003 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
16
Violations (last 5yr)
3
Unresolved
8
Health-Related
TIER 2Unresolved
Violation related to Consumer Confidence Report
When: August 8, 2025Rule: Consumer Confidence RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 2Unresolved
Violation related to Consumer Confidence Report
When: August 8, 2025Rule: Consumer Confidence RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 2Unresolved
Violation related to Consumer Confidence Report
When: August 8, 2025Rule: Consumer Confidence RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 2Resolved
Treatment technique violation
When: October 17, 2024 – January 28, 2025Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Disinfection byproduct treatment technique failure
When: November 20, 2023 – September 8, 2024Rule: Ground Water RuleEnforcement: Formal — state order issued
TIER 3Resolved
Disinfection byproduct treatment technique failure
When: November 20, 2023 – September 8, 2024Rule: Ground Water RuleEnforcement: Formal — state order issued
TIER 2Resolved
Consumer confidence report — content deficiency
When: July 11, 2023 – November 27, 2023Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Disinfection byproduct treatment technique failure
When: June 28, 2023 – September 6, 2024Rule: Ground Water RuleEnforcement: Formal — state order issued
TIER 2Resolved
Violation related to Consumer Confidence Report
When: May 17, 2023 – April 29, 2025Rule: Consumer Confidence RuleEnforcement: Formal — state order issued
TIER 3Resolved
Disinfection byproduct treatment technique failure
When: December 14, 2022 – September 8, 2024Rule: Ground Water RuleEnforcement: Formal — state order issued
TIER 3Resolved
Disinfection byproduct treatment technique failure
When: December 14, 2022 – September 8, 2024Rule: Ground Water RuleEnforcement: Formal — state order issued
TIER 2Resolved
Consumer confidence report — content deficiency
When: July 11, 2022 – November 27, 2023Rule: Ground Water RuleEnforcement: 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: July 1, 2022 – December 31, 2022Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Consumer confidence report — inadequate or unavailable
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: January 1, 2022 – May 25, 2021Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Disinfection byproduct treatment technique failure
When: October 30, 2021 – September 13, 2024Rule: Ground Water RuleEnforcement: Formal — state order issued
TIER 2Resolved
Violation related to Consumer Confidence Report
When: September 6, 2021Rule: 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
Water Utility Details
TOWN OF GUEYDAN WATER SYSTEM
Population Served
2,016
Water Source
Groundwater
System ID
LA1113006
Frequently Asked Questions About Gueydan Water
Is Gueydan tap water safe to drink?
Gueydan, Louisiana tap water receives a grade of F (19/100), which is considered failing. 1 contaminant(s) exceed EPA maximum contaminant levels and 22 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.
What contaminants are in Gueydan's water?
Of the 2 contaminants tested in Gueydan'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 Gueydan have any water quality violations?
Yes, Gueydan has 22 EPA violation(s) on record, with the most recent in 2025. Violation types include TT, Other, MR. 12 of these are health-based violations, which are the most serious category.
Do I need a water filter in Gueydan?
Based on EPA data, using a water filter in Gueydan 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 Gueydan's tap water come from?
Gueydan's drinking water is sourced from groundwater and supplied by TOWN OF GUEYDAN WATER SYSTEM. The system serves approximately 2,016 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is Gueydan'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. Gueydan'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 Gueydan's water compare to other cities in Louisiana?
Gueydan's water quality score of 19/100 earns a grade of F, which is considered failing. 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 Gueydan's water quality?
If you have concerns about Gueydan'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 (TOWN OF GUEYDAN WATER SYSTEM) 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.