County · Louisiana
St. Tammany Parish, Louisiana: drinking water records
Explore EPA records for 95 community water systems across 16 ZIP codes in St. Tammany Parish, then find water-testing resources and available recent monitoring-station readings.
Data as of EPA UCMR 5 final release, August 2026 (file dated Aug 28, 2026) · EPA SDWIS 2026Q2 (file dated Jul 9, 2026). How we build these pages
Drinking-water records
EPA survey and compliance records are historical reports. UCMR 5 results are available for 19 of the 95 listed systems in this snapshot. A system with no reported PFAS detection is not a test of every tap or every contaminant.
System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.
Water systems in this county
All 95 active community systems in the available county records, sorted by record completeness. Scroll the table to explore more systems.
| Water system | People served | PFAS survey results | PFAS found | Health-based violations | Lead, 9 in 10 homes at or below |
|---|---|---|---|---|---|
| Slidell Water Supply LA1103041 | 35,547 | 420 | 0 | 1 | 0 ppbbelow the action level |
| City of Covington Water Supply LA1103011 | 16,185 | 180 | 0 | 1 | 0 ppbbelow the action level |
| St Tam Parish - Cross Gates Sd LA1103053 | 8,037 | 120 | 1 | 1 | 0 ppbbelow the action level |
| Town of Abita Springs Water System LA1103002 | 3,693 | 120 | 0 | 1 | 2 ppbbelow the action level |
| Folsom Water Supply LA1103014 | 1,992 | 180 | 0 | 1 | 0 ppbbelow the action level |
| St Tam Parish- Bedico -Faubourg-Coquille LA1103149 | 18,372 | 300 | 0 | 0 | 0 ppbbelow the action level |
| St Tam Parish - Briarwood Terrace LA1103079 | 17,536 | 300 | 0 | 0 | 2 ppbbelow the action level |
| City of Mandeville Water Supply LA1103023 | 13,000 | 180 | 0 | 0 | 0 ppbbelow the action level |
| Utilities INC - North Park Water Supply LA1103124 | 11,298 | 271 | 0 | 0 | 0 ppbbelow the action level |
| Bayou Liberty Water Association LA1103005 | 10,791 | 120 | 0 | 0 | 1 ppbbelow the action level |
| Magnolia-Eden Isles LA1103013 | 10,155 | 60 | 0 | 0 | 1 ppbbelow the action level |
| Magnolia-Greenleaves LA1103118 | 8,031 | 120 | 0 | 0 | 0.3 ppbbelow the action level |
| Lee Road Water Corporation LA1103020 | 7,665 | 120 | 0 | 0 | 0 ppbbelow the action level |
| Magnolia-Resolve Whisperwood LA1103046 | 6,867 | 120 | 0 | 0 | 1 ppbbelow the action level |
| Utilities INC - Kingspoint Subdivision LA1103055 | 6,351 | 120 | 0 | 0 | 0 ppbbelow the action level |
| St Tammany Water District #2 LA1103033 | 5,200 | 60 | 0 | 0 | 0 ppbbelow the action level |
| Magnolia-The Meadows LA1103106 | 4,701 | 90 | 0 | 0 | 0.9 ppbbelow the action level |
| Beau Chene Water System LA1103006 | 4,650 | 120 | 0 | 0 | 0 ppbbelow the action level |
| Magnolia-Lakeshore Estates LA1103171 | 4,146 | 0 | 0 | 2 | 1 ppbbelow the action level |
| Town of Pearl River LA1103157 | 3,333 | 120 | 0 | 0 | 0 ppbbelow the action level |
| Utilities INC - Green Brier Water Supply LA1103130 | 2,250 | 0 | 0 | 2 | 0.8 ppbbelow the action level |
| Utilities INC - Magnolia Forest Subd LA1103054 | 1,635 | 0 | 0 | 1 | 0.8 ppbbelow the action level |
| Tchefuncta Club Estates LA1103043 | 1,245 | 0 | 0 | 2 | 0.5 ppbbelow the action level |
| Lake Ramsey LA1103139 | 840 | 0 | 0 | 7 | 2 ppbbelow the action level |
| Village of Sun Water Supply LA1103038 | 726 | 0 | 0 | 11 | 2 ppbbelow the action level |
| Ponderosa Ranches Subdivision LA1103077 | 579 | 0 | 0 | 8 | 0 ppbbelow the action level |
| Marina del Ray Water System LA1103123 | 500 | 0 | 0 | 1 | 1 ppbbelow the action level |
| St Tam Parish - Northlake Behavioral LA1103039 | 480 | 0 | 0 | 2 | 5 ppbbelow the action level |
| Oak Villa Mobile Home Community LA1103152 | 420 | 0 | 0 | 7 | 0 ppbbelow the action level |
| Village Guthrie Subdivision LA1103066 | 405 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Central Park Subdivision LA1103088 | 342 | 0 | 0 | 5 | 1.5 ppbbelow the action level |
| Magnolia Water Utilites - Cherrywood LA1103129 | 306 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Eagle Lake Mobile Home Park LA1103110 | 300 | 0 | 0 | 4 | 0 ppbbelow the action level |
| Magnolia-Rigolets Estates LA1103122 | 273 | 0 | 0 | 11 | 3 ppbbelow the action level |
| Magnolia-I59 MHP LA1103179 | 255 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Magnolia-Homeland Height LA1103072 | 234 | 0 | 0 | 2 | 0.3 ppbbelow the action level |
| St Tam Parish- Ben Thomas Rd LA1103105 | 220 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Magnolia-Port Louis Townhomes LA1103153 | 200 | 0 | 0 | 1 | 5 ppbbelow the action level |
| Chahta Mobile Home Park LA1103125 | 180 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Magnolia-Pilot Street LA1103193 | 174 | 0 | 0 | 3 | 0 ppbbelow the action level |
| St Joseph Abbey LA1103032 | 127 | 0 | 0 | 4 | 0 ppbbelow the action level |
| Creek Place Apartments LA1103081 | 100 | 0 | 0 | 4 | 1 ppbbelow the action level |
| Indian Hills Trailer Park LA1103143 | 100 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Magnolia-Beverly Heights LA1103178 | 100 | 0 | 0 | 3 | 0 ppbbelow the action level |
| Big Branch Trailer Park LA1103182 | 92 | 0 | 0 | 1 | 3 ppbbelow the action level |
| St Tam Parish - Lake Hills Village LA1103128 | 88 | 0 | 0 | 4 | 1 ppbbelow the action level |
| Azalea Lane Trailer Park LA1103004 | 84 | 0 | 0 | 16 | 4.3 ppbbelow the action level |
| Ozone Pine Subdivision LA1103069 | 75 | 0 | 0 | 14 | 0 ppbbelow the action level |
| Lewisburg Estates LA1103156 | 60 | 0 | 0 | 3 | 0 ppbbelow the action level |
| Pearl Plantation Townhse LA1103131 | 60 | 0 | 0 | 7 | 0 ppbbelow the action level |
| Timberland Mobile Home Park LA1103194 | 60 | 0 | 0 | 2 | 1 ppbbelow the action level |
| Madisonville on the Lake LA1103176 | 51 | 0 | 0 | 6 | 0.9 ppbbelow the action level |
| Giving Hope Retreat LA1103062 | 45 | 0 | 0 | 8 | 1 ppbbelow the action level |
| Oak River Estates LA1103159 | 25 | 0 | 0 | 5 | 4 ppbbelow the action level |
| Salt Bayou Kampground - Vista Sites LA1103174 | 25 | 0 | 0 | 2 | 0 ppbbelow the action level |
| St Tammany Water District 3 LA1103056 | 2,920 | 0 | 0 | 0 | 7 ppbbelow the action level |
| Magnolia-Guste Island LA1103189 | 2,847 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Utilities INC - Lake Village Sd LA1103064 | 2,724 | 0 | 0 | 0 | 0 ppbbelow the action level |
| St Tam Parish Pineland Park Subd LA1103093 | 2,500 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Utilities INC - Huntwyck Village LA1103073 | 2,088 | 0 | 0 | 0 | 0 ppbbelow the action level |
| St Tam Parish -Northridge Estates LA1103181 | 1,653 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Utilities INC - Woodridge Subdivision LA1103075 | 1,590 | 0 | 0 | 0 | 2 ppbbelow the action level |
| Utilities INC - Quail Ridge Subdivision LA1103074 | 1,563 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Magnolia-Monterey Subdivision LA1103148 | 1,356 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Magnolia-Penn Mill Lakes LA1103185 | 1,152 | 0 | 0 | 0 | 0 ppbbelow the action level |
| St Tam Parish - River Oaks LA1103180 | 933 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Villages of Bocage- Madisonville LA1103195 | 894 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Village of Madisonville Water Supply LA1103022 | 871 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Magnolia-Money Hills Estates LA1103164 | 825 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Magnolia-River Park LA1103198 | 822 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Magnolia-Brier Lake Utilities INC LA1103141 | 630 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Utilities INC - Oakmont Subd LA1103108 | 612 | 0 | 0 | 0 | 0 ppbbelow the action level |
| St Tam Parish - Abita Lakes LA1103173 | 609 | 0 | 0 | 0 | 3 ppbbelow the action level |
| Pine Crest Trailer Park LA1103078 | 600 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Magnolia-Grande Palms LA1103142 | 579 | 0 | 0 | 0 | 1 ppbbelow the action level |
| St Tam Parish - Alton LA1103145 | 499 | 0 | 0 | 0 | 1.2 ppbbelow the action level |
| Magnolia-Oaklawn Trace LA1103201 | 480 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Magnolia-Bleu Lake Hills LA1103132 | 420 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Magnolia-Pruden Creek LA1103197 | 324 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Forest Glen Sd LA1103137 | 270 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Magnolia-Autumn Haven LA1103190 | 267 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Magnolia-Beau Pre LA1103134 | 240 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Manganos Mobile Home Park LA1103071 | 234 | 0 | 0 | 0 | 0 ppbbelow the action level |
| St Tam Parish - Tamanend LA1103199 | 222 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Magnolia-Rigolets Harbor LA1103144 | 200 | 0 | 0 | 0 | 2 ppbbelow the action level |
| Magnolia-Penn Mill Place LA1103200 | 171 | 0 | 0 | 0 | 0.8 ppbbelow the action level |
| St Tam Parish Salvation Manor St Joe LA1103184 | 171 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Utilities INC - Beau Village LA1103113 | 165 | 0 | 0 | 0 | 3 ppbbelow the action level |
| Lacombe Nursing Centre LA1103018 | 150 | 0 | 0 | 0 | 0 ppbbelow the action level |
| St Tam Parish-Madisonville Woods LA1103147 | 87 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Chapman Apartments LA1103150 | 80 | 0 | 0 | 0 | 1.4 ppbbelow the action level |
| Magnolia-Whippoorwill Grove LA1103165 | 78 | 0 | 0 | 0 | 0 ppbbelow the action level |
| St Tam Parish - St Gertrude LA1103154 | 72 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Hillcrest / Snead Apartments LA1103160 | 60 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Alexander Milne Home for Women LA1103196 | 42 | 0 | 0 | 0 | 0 ppbbelow the action level |
USGS · Monitoring stations
The water, more recently.
Available station readings in St. Tammany Parish, Louisiana. Each measurement keeps its time, unit and original source.
These readings describe water at a monitoring station. They do not test your tap, measure PFAS or lead, or determine whether water is safe to drink or swim in.
Recent observations load when this section comes into view.
How these readings update
We check for updates every 10 minutes while this section is visible and show supported observations from the last 48 hours. The time beside a reading is when USGS measured it; the checked time is when our service retrieved the response. We mark a reading more than 6 hours old as older. Provisional observations can change after USGS review. A missing reading does not mean zero or clean water.
Temperature, pH, dissolved oxygen, turbidity, conductivity, streamflow and water level are shown only where a station reports them. Different measurements have different units and sampling intervals. USGS data and documentation.
Your next step
Water testing, reports & local help.
Use these official directories to find your drinking-water agency, a certified laboratory and public water records. We have not yet added an individually reviewed local resource list for this county.
Official national directories
Water testing
Find your state’s private-well program
EPA’s state directory points well owners to local program information. Services and eligibility vary by state and county.
Water testing
Find a certified drinking-water laboratory
Use EPA’s directory to reach your state’s laboratory certification program. EPA does not provide on-request testing of residential drinking water.
Public records
Find your utility’s Consumer Confidence Report
EPA links to community water-system reports and explains how to read them. Look for your actual supplier rather than assuming every address in a county shares one system.
Public records
Explore USGS water observations
Find current and historical observations from USGS monitoring locations, including available stream, lake, and groundwater data. Measurements vary by station and do not replace a test of your household water.
A county overview cannot identify every property’s water provider. If you use a public water system, confirm its name on your bill and request its annual Consumer Confidence Report. Private wells need their own testing; public-system records do not describe a private well.
Understand water testing and laboratory reportsResource descriptions are compiled by Tap Water Lookup. Review dates describe our source check, not a new water sample. How we review sources · Suggest a correction
Explore your area
Local coverage in St. Tammany Parish
16ZIP areas in this overview
Explore the water-system records, recent station readings and testing resources on this county page. They describe the systems and stations identified in each section; they are not a separate water test for every community.
Towns and communities
- Abita Springs
- Covington
- Folsom
- Lacombe
- Madisonville
- Mandeville
- Pearl River
- Slidell
- Sun
View ZIP areas and understand coverage
- 70420Abita Springs
- 70431
- 70433Covington
- 70435Covington
- 70437Folsom
- 70445Lacombe
- 70447Madisonville
- 70448Mandeville
- 70452Pearl River
- 70457
- 70458Slidell
- 70460Slidell
- 70461Slidell
- 70463Sun
- 70464
- 70471Mandeville
These Census ZIP Code Tabulation Areas are grouped here by their largest county overlap. A ZIP area can cross county lines and contain several water suppliers or private wells. Place labels reflect Census geography, not verified postal city names or utility service boundaries.
Records for these areas are currently presented in this county overview rather than individual ZIP reports. An unpublished report does not mean there are no water records. Confirm your supplier on your water bill; if you use a private well, testing your own well is the relevant next step.
Sources and scope
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Database prepared 2026-09-03.
Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.
Compiled by Tap Water Lookup from the sources identified on this page. Read the methodology and review process.