Water Quality in Bay Saint Louis, MS: 17 Violations - Grade N/A
5 water systems · 1 directly mapped ZIP records
Available EPA records report 17 violations across 1 directly mapped ZIP records with known counts for Bay Saint Louis. This is compliance evidence, not a property-level tap-water verdict.
Data: EPA Safe Drinking Water Information System (SDWIS)
Water Quality by ZIP Code in Bay Saint Louis
This table shows typed EPA water evidence only. Missing violation counts are displayed as N/A, not zero.
| ZIP Code | Violations | Health | |
|---|---|---|---|
| 39520 | 17 | 5 | View report → |
Violation Trend
EPA violations recorded for water systems serving Bay Saint Louis.
| Year | Total violations | Health-based |
|---|---|---|
| 2022 | 1 | 1 |
| 2023 | 1 | 1 |
| 2024 | 3 | 3 |
Water Quality Overview
Bay Saint Louis, Mississippi has directly mapped EPA water-system data for 1 ZIP codes. This page reports typed compliance facts and does not relabel the multi-source Home Safety Score as a drinking-water grade.
The available EPA records report 17 violations, including 5 health-based violations across 1 directly mapped ZIP record with reported counts.
Lead Levels
The average 90th percentile lead level across Bay Saint Louis water systems is 0.0090 mg/L - within EPA limits. No exceedances appear among the 1 ZIP records with known lead status.
Water Systems Serving Bay Saint Louis
Bay Saint Louis is served by 5 community water systems regulated under the Safe Drinking Water Act. These systems collectively serve approximately 15,471 people across 2 ZIP codes.
Each water system is identified by a Public Water System ID (PWSID) and is required to:
- Test for over 90 regulated contaminants on a regular schedule
- Report results to the EPA and state regulators
- Issue an annual Consumer Confidence Report (CCR) to all customers
- Take corrective action when violations occur
The EPA has taken 10 enforcement actions against water systems serving Bay Saint Louis. Enforcement actions range from informal compliance assistance to formal orders and penalties.
How to Check Your Water in Bay Saint Louis
Enter your ZIP code on ZipCheckup to see your specific water system data, including contaminant levels and violation history
Request your CCR - your water utility must provide an annual Consumer Confidence Report with detailed test results for all monitored contaminants
Get a home test - certified kits cost $20–$50 and test for lead, bacteria, and common contaminants. Professional lab tests ($150–$400) cover a broader panel
Consider filtration - NSF-certified filters can remove specific contaminants. Reverse osmosis removes the broadest range; activated carbon is effective for chlorine and many organics
Check for advisories - monitor your local utility website and local news for boil water advisories or system alerts
Contaminants Detected in Bay Saint Louis Water Systems
The following contaminants have been detected or caused violations across Bay Saint Louis's water systems:
| Contaminant | Category | MCL | Violations | ZIPs Affected | Health-Based |
|---|---|---|---|---|---|
| Haloacetic Acids (HAA5) | Disinfection Byproducts | 0.06 mg/L | 5 | 1 | Yes |
| Revised Total Coliform Rule | Microbiological | N/A | 4 | 1 | No |
| Lead and Copper Rule | Treatment Technique | N/A | 4 | 1 | No |
| Surface Water Treatment Rule | Treatment Technique | N/A | 1 | 1 | No |
MCL = Maximum Contaminant Level (EPA enforceable standard). Health-based violations indicate levels that may pose direct health risks.
Violation Trend Over Time
Year-by-year EPA violations recorded for water systems serving Bay Saint Louis:
| Year | Total Violations | Health-Based |
|---|---|---|
| 2022 | 1 | 1 |
| 2023 | 1 | 1 |
| 2024 | 3 | 3 |
Violations have increased from 1 in 2022 to 3 in 2024. This trend warrants monitoring.
EPA Enforcement History
The EPA and state regulators have taken 10 enforcement actions against water systems serving Bay Saint Louis. Recent actions:
| Date | Action Type |
|---|---|
| 2025-09-15 | State Order Action |
| 2025-07-01 | State Order Extension |
| 2025-06-06 | State Informal Action |
| 2025-06-05 | State Informal Action |
| 2025-04-29 | State Informal Action |
| 2025-04-21 | State Order Extension |
| 2025-04-15 | State Filed Judgment |
| 2025-04-15 | State Informal Enforcement |
| 2025-02-25 | State Order Extension |
| 2025-02-13 | State Filed Judgment |
Enforcement actions range from informal compliance assistance to formal orders and penalties. The most recent action was on 2025-09-15.
Bay Saint Louis vs. Nearby Mississippi Cities
How Bay Saint Louis's water quality compares to similar cities in Mississippi:
| City | Direct EPA ZIPs | Violations | Systems | Population |
|---|---|---|---|---|
| Bay Saint Louis | 1 | 17 | 5 | 15,471 |
| New Albany | 1 | 38 | 5 | 15,540 |
| Holly Springs | 1 | 6 | 3 | 15,312 |
| Carthage | 1 | 25 | 5 | 15,242 |
Common Questions About Bay Saint Louis Water
These are the most common questions residents search for about water quality in Bay Saint Louis, Mississippi:
Is Bay Saint Louis water hard or soft? Water hardness varies by source. Bay Saint Louis's 5 water systems use multiple sources. Check your ZIP code report for specific hardness data.
Can I drink Bay Saint Louis tap water? City-level EPA records cannot determine safety at a specific tap. The measured subset contains 5 health-based violations; check the affected utility record and consider certified testing.
What is the best water filter for Bay Saint Louis? A NSF/ANSI 53-certified filter for lead removal is a good general choice. See our Water Filter Matcher for personalized recommendations.
Bay Saint Louis vs. Mississippi Average
Understanding how Bay Saint Louis compares to the broader Mississippi average helps contextualize your local water quality. Factors like water source, treatment methods, and infrastructure age all contribute to differences between cities in the same state.
To see how individual neighborhoods compare, check the ZIP code reports below - water quality can vary significantly even within Bay Saint Louis.
ZIP Codes in Bay Saint Louis
Bay Saint Louis spans 2 ZIP codes. EPA water-system coverage is available for 1 directly mapped ZIP code. Check each ZIP code for detailed contaminant data, violation history, and system information.
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
- Enforcement: EPA ECHO database
- Filter recommendations: NSF/ANSI certified products
Source reporting periods vary. See each cited source for its publication schedule.