STATE REPORT LA 12 ALERTS 638 HEALTH VIOLATIONS

Louisiana Water Quality & Safety Report

36 ZIP codes · 120 water systems · State-specific plumbing code · Updated 2026-03-16

Data: EPA SDWIS, NWS, State plumbing boards, Rewiring America Last verified: 2026-03-16

36
ZIP Codes
120
Water Systems
26
ZIPs with Violations
12
Active Alerts
State-specific
Plumbing Code

Overview

We track water quality, weather alerts, plumbing regulations, and energy rebates for 36 ZIP codes across Louisiana, covering 120 community water systems that serve approximately 2,289,570 people.

26 of 36 ZIP codes (72%) have recorded EPA violations. 638 health-based violations have been documented.

Active Weather Alerts

12 active alerts in Louisiana including 8 warnings. Severe weather can directly affect tap water quality — flooding, power outages, and infrastructure damage may lead to boil-water advisories.

AlertSeverityAreas
Tornado WatchExtremeSt. Tammany, LA; Hancock, MS; Harrison, MS; Jackson, MS; …
Flood WarningSevereColumbia, AR; Webster, LA
Severe Thunderstorm WarningSevereOrleans, LA; St. Tammany, LA; Hancock, MS
Red Flag WarningSeverePointe Coupee; West Feliciana; East Feliciana; St. Helena…
Freeze WatchSevereSoutheast St. Tammany; Southwestern St. Tammany; Lower Ta…

View all Louisiana alerts →

Plumbing Regulations

Louisiana follows the Louisiana State Plumbing Code (NSPC-based) (Current edition).

  • Plumbing code: State-specific (Current)
  • Homeowner DIY: Licensed plumber required
  • Water heater permit: Required
  • Annual backflow test: Required

Full Louisiana regulations →

Areas with Most Violations

ZIP CodeCitySafety ScoreViolationsHealth-BasedSystem
71301Alexandria—164140CITY OF ALEXANDRIA WATER SYSTEM
70037Belle Chasse—10296BELLE CHASSE WATER DISTRICT
71101Shreveport—9685SHREVEPORT WATER SYSTEM
70764Plaquemine—6862CITY OF PLAQUEMINE WATER SYSTEM
71201Monroe—6357MONROE WATER SYSTEM
71111Bossier City—6239CITY OF BOSSIER CITY WATER SYSTEM
71282Tallulah—3729TALLULAH WATER SYSTEM
70112New Orleans—3613NEW ORLEANS CARROLLTON WATER WORKS
70560New Iberia—3319IBERIA WATER WORKS DISTRICT 3 - COTEAU
71220Bastrop—2418BASTROP WATER SYSTEM

Areas with No Violations

ZIP CodeCitySafety ScoreSystemPopulation
70043Chalmette—ST BERNARD PARISH WATERWORKS44,783
70301Thibodaux—THIBODAUX WATERWORKS14,862
70360Houma—SCHRIEVER WATER TREATMENT SERVICE AREA116,460
70448Mandeville—MANDEVILLE WATER SUPPLY13,000
70500Lafayette—LAFAYETTE UTILITIES WATER SYSTEM169,389
70510Abbeville—CITY OF ABBEVILLE WATER SYSTEM14,445
70601Lake Charles—CITY OF LAKE CHARLES WATER SYSTEM79,500
70801Baton Rouge—BATON ROUGE WATER COMPANY596,844
71270Ruston—RUSTON WATER SYSTEM22,468
71457Natchitoches—NATCHITOCHES WATER SYSTEM27,693

Lead & Copper

  • 0 ZIP codes exceed the EPA lead action level

Radon Risk

  • High risk (Zone 1): 0 ZIP codes (0%)
  • Moderate risk (Zone 2): 0 ZIP codes
  • Low risk (Zone 3): 0 ZIP codes

All 36 ZIP Codes in Louisiana

Data Sources

Updated daily.

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