Tapcensus

Louisiana

St. Tammany Parish drinking water quality

207 active public water systems serve 267,954 people in St. Tammany Parish. 115 are compliant, 92 had at least one EPA violation in the past three years, 10 are designated serious violators, and 28 carry a health flag.

Active systems 207 94 community systems
People served 268K by public water systems
Systems with violations 92 44% of active systems, past 3 years
Serious violators 10 28 systems carry a health flag

Needs attention

ST Tammany Water District 3 LA1103056 · Community water system · Serves 2,920 3 rules violated in the past three years. Unresolved: Ground Water Rule, Lead and Copper Rule, and Consumer Confidence Rule.
Mayfield Elementary School LA2103505 · Non-Transient non-community system · Serves 890 3 rules violated in the past three years. Unresolved: Ground Water Rule, Lead and Copper Rule, and Public Notice Rule and Revised PN Rule.
Ponderosa Ranches Subdivision LA1103077 · Community water system · Serves 579 3 rules violated in the past three years. Unresolved: Ground Water Rule, Lead and Copper Rule, and Public Notice Rule and Revised PN Rule.
Marina del Ray Water System LA1103123 · Community water system · Serves 500 3 rules violated in the past three years. Unresolved: Lead and Copper Rule and Consumer Confidence Rule.
Olivia Inn LA2103241 · Transient non-community system · Serves 500 2 rules violated in the past three years. Unresolved: Ground Water Rule and Public Notice Rule and Revised PN Rule.
Central Park Subdivision LA1103088 · Community water system · Serves 342 4 rules violated in the past three years. Unresolved: Ground Water Rule, Stage 2 Disinfectants and Disinfection Byproducts Rule, Lead and Copper Rule, and Public Notice Rule and Revised PN Rule.
Eagle Lake Mobile Home Park LA1103110 · Community water system · Serves 300 3 rules violated in the past three years. Unresolved: Ground Water Rule, Lead and Copper Rule, and Consumer Confidence Rule.
Lacombe-Mandeville Headstart LA2103356 · Non-Transient non-community system · Serves 130 4 rules violated in the past three years. Unresolved: Ground Water Rule, Lead and Copper Rule, and Public Notice Rule and Revised PN Rule.
ST Tammany Recreation District 2 LA2103478 · Transient non-community system · Serves 35 3 rules violated in the past three years. Unresolved: Revised Total Coliform Rule, Ground Water Rule, and Public Notice Rule and Revised PN Rule.
Southern Comfort Lounge LA2103515 · Transient non-community system · Serves 25 2 rules violated in the past three years. Unresolved: Ground Water Rule and Public Notice Rule and Revised PN Rule.

19 more systems with a serious violator or health flag designation are in the lists below.

Community water systems

94 systems, largest first
SystemServesStatusRules violated, 3 yrUnresolved
City of Slidell Water Supply
 35,547 0 0
ST Tam Parish Bedico -Faubourg-Coquille
 18,372 0 0
ST Tam Parish Briarwood Terrace
 17,536 1 1
City of Covington Water Supply
 16,185 3 0
City of Mandeville Water Supply
 13,000 0 0
Utilities INC North Park Water Supply
 11,298 0 0
Bayou Liberty Water Association
 10,791 0 0
Magnolia-Eden Isles
 10,155 0 0
ST Tam Parish Cross Gates SD
 8,037 0 0
Magnolia-Greenleaves
 8,031 0 0
Lee Road Water Corporation
 7,665 0 0
Magnolia-Resolve Whisperwood
 6,867 0 0
Utilities INC Kingspoint Subdivision
 6,351 0 0
ST Tammany Water District #2
 5,200 0 0
Magnolia-The Meadows
 4,701 1 0
Beau Chene Water System
 4,650 0 0
Magnolia-Lakeshore Estates
 4,146 0 0
Town of Abita Springs Water System
 3,693 0 0
Town of Pearl River
 3,333 0 0
ST Tammany Water District 3
 2,920 3 3
Magnolia-Guste Island
 2,847 0 0
Utilities INC Lake Village SD
 2,724 0 0
ST Tam Parish Pineland Park Subd
 2,500 0 0
Utilities INC Green Brier Water Supply
 2,250 0 0
Utilities INC Huntwyck Village
 2,088 0 0
Village of Folsom Water Supply
 1,992 0 0
ST Tam Parish -Northridge Estates
 1,653 0 0
Utilities INC Magnolia Forest Subd
 1,635 1 0
Utilities INC Woodridge Subdivision
 1,590 1 0
Utilities INC Quail Ridge Subdivision
 1,563 1 0
Magnolia-Monterey Subdivision
 1,356 1 1
Tchefuncta Club Estates
 1,245 0 0
Magnolia-Penn Mill Lakes
 1,152 0 0
ST Tam Parish River Oaks
 933 0 0
Villages of Bocage Madisonville
 894 0 0
Village of Madisonville Water Supply
 871 0 0
Lake Ramsey
 840 4 2
Magnolia-Money Hills Estates
 825 0 0
Magnolia-River Park
 822 0 0
Village of Sun Water Supply
 726 0 0
Magnolia Brier Lake
 630 0 0
Utilities INC Oakmont Subd
 612 0 0
ST Tam Parish Abita Lakes
 609 0 0
Pine Crest Trailer Park
 600 2 1
Magnolia-Grande Palms
 579 0 0
Ponderosa Ranches Subdivision
 579 3 3
Marina del Ray Water System
 500 3 2
ST Tam Parish Alton
 499 1 1
Magnolia-Oaklawn Trace
 480 2 0
ST Tam Parish Northlake Behavioral
 480 1 1
Non-community systems (113: schools, campgrounds, workplaces, restaurants)

These systems serve places people visit rather than homes.

SystemServesStatusRules violated, 3 yrUnresolved
Pelican Park
 2,000 0 0
ST Tam Parish Medcath (la Heart)
 1,001 1 1
Fontainebleau State Park
 1,000 0 0
Knights of Columbus Bingo
 1,000 0 0
Rouses Markets #92
 1,000 0 0
Lacombe Stores
 999 0 0
Arby's
 900 0 0
Mayfield Elementary School
 890 3 3
Lakeshore High School
 750 1 0
Sunny Times 4 LLC
 750 2 2
Sixth Ward JR High W S
 607 1 1
Sixth Ward Cafeteria
 575 2 1
Rallys Hamburgers
 550 1 1
Salt Bayou Kampground
 540 0 0
Fifth Ward JR High W S
 530 1 0
House of Seafood
 525 0 0
Briggs of Hwy 190
 500 0 0
Monteleone JR High School
 500 1 1
Olivia Inn
 500 2 2
ST Scholastica Athletic Field
 500 0 0
The Inn at la Provence
 500 2 2
WE Dat Stop
 500 1 1
Jubilee RV Park
 480 2 1
Abita Event Center
 400 0 0
Fat Spoon Cafe #2
 400 0 0
Stop N Shop 15
 400 0 0
Chata-Ima Elementary School W S
 399 1 0
The Field Church
 325 0 0
Tulane University Primate Center
 320 0 0
Dollar General Lacombe
 300 0 0
Land-O-Pines Campground
 300 0 0
Abita Springs RV Resort
 279 0 0
Lake Castle School
 270 1 0
Bayou Lacombe Middle School
 266 1 1
Bush Shell 2
 200 0 0
Sal & Judys Water Supply
 200 0 0
The Greenwood (sh Events, Llc.)
 200 0 0
OM Pearl River Oil
 150 2 2
Dirty Laundry Linen Service
 134 0 0
Lacombe-Mandeville Headstart
 130 4 3
Top Velocity
 129 0 0
Folger Coffee Co-Lacombe Distrib Cntr
 125 0 0
Starc Freamaux
 115 1 0
Carollas Shopping Center
 101 0 0
Goodbee Quickstop
 100 1 1
Habaneros Mexican Kitchen
 100 0 0
K C Abbey Youth Camp W S
 100 0 0
Laborde Products
 100 0 0
Matt Bowers Hyundai Slidell
 100 0 0
Mayhem Baseball
 100 3 2
Northshore 1 Commercial Condo Assoc
 100 0 0
Social Security Admin Office
 100 0 0
Sunny Times Chevron
 100 0 0
The Restaurant
 100 1 1
White House Holdings, LLC
 100 0 0
Kinderhaus Montessori
 90 1 1
Ford Lincoln Mercury of Slidell
 80 0 0
Lakeshore Chrysler
 80 0 0
Camp Covington Girl Sct
 75 0 0
Honda of Slidell
 75 0 0
Assuntas Restaurant
 70 1 0
Chillco, Inc.
 68 0 0
Abita Oaks Llc.
 60 0 0
Delta College Buildings 1 & 3
 60 1 0
Legacy Buick Gmc
 60 1 1
ST Tammany Parish 911 Communicat Center
 56 0 0
Abita Petro Plus
 50 2 2
Bayou Stuf
 50 1 1
Carlock Toyota of Slidell
 50 1 1
Delta College Building 2
 50 0 0
Dollar General Store NO 12728
 50 0 0
Dollar General Store NO 7594
 50 0 0
Empa Taco
 50 0 0
Keith Youngs Restaurant
 50 0 0
Kidz Klubhouse
 50 0 0
Mandabita Plaza
 50 0 0
Petro Guardian LLC
 50 0 0
Piggly Wiggly Express
 50 1 1
State Police Troop L
 50 0 0
Two Sisters Billiards
 50 0 0
Waste Management
 42 1 0
A to Z Daycare Center
 40 1 0
Dollar General NO 09535
 40 1 0
Hole in the Wall
 40 2 2
Insta-Gator Ranch
 40 1 1
Jmk Ventures Water System
 40 0 0
Pavestone
 40 1 0
Planet Kids Academy #2
 40 0 0
The First Class Academy Daycare
 40 2 1
Tiny Toes & Tots, LLC
 40 2 2
Trumpet in Zion Fellowship INC
 40 4 3
ST Tammany Recreation District 2
 35 3 3
Tammany Supply Water System
 30 3 0
Family Dollar #7491
 26 2 2
J&s Bayou Gas & Grocery
 26 0 0
Backroads Mercantile
 25 0 0
Bayou Industrial Park
 25 0 0
Coastal Environmental Services
 25 1 1
DA Crab Trap
 25 0 0
Dollar General Store 18417
 25 0 0
All 113 in the systems table
Inactive systems (495, no longer operating or reporting)

Kept for the record and excluded from the county totals above. Browse inactive systems.

About this data

Totals cover active systems. Systems serving more than one county are counted in each county. EPA counts the rules a system was in violation of, not the individual violations; one rule can carry several.

Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Louisiana records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet.