What was found in Slidell's water
The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Fluoride | 370 µg/L 9.3% of the EPA limit 4000 µg/L Main supplier: SLIDELL WATER SUPPLY · 35,547 people · 2019
Highest in the city: 1100 µg/L — TIMBERLAND MOBILE HOME PARK · 60 people · 2018 | 8/8 | SYR4 |
| Nitrate-Nitrite | 39 µg/L 0.4% of the EPA limit 10000 µg/L Main supplier: SLIDELL WATER SUPPLY · 35,547 people · 2019
Highest in the city: 1000 µg/L — INDIAN HILLS TRAILER PARK · 100 people · 2019 | 7/8 | SYR4 |
| Copper | 200 µg/L 15% of the EPA limit 1300 µg/L Main supplier: SLIDELL WATER SUPPLY · 35,547 people · 2019 | 6/8 | SYR4 |
| Monobromoacetic Acid | 79.375 µg/L No EPA limit set Highest in the city: INDIAN HILLS TRAILER PARK · 100 people · 2019 | 3/8 | SYR4 |
| Total Haloacetic Acids (HAA5) | 10.8 µg/L 18% of the EPA limit 60 µg/L Main supplier: SLIDELL WATER SUPPLY · 35,547 people · 2019
Highest in the city: 72.3 µg/L — INDIAN HILLS TRAILER PARK · 100 people · 2019 | 7/8 | SYR4 |
| TTHM | 20.24 µg/L 25% of the EPA limit 80 µg/L Main supplier: SLIDELL WATER SUPPLY · 35,547 people · 2019
Highest in the city: 65.665 µg/L — INDIAN HILLS TRAILER PARK · 100 people · 2019 | 7/8 | SYR4 |
| Barium | 14.7 µg/L 0.7% of the EPA limit 2000 µg/L Main supplier: SLIDELL WATER SUPPLY · 35,547 people · 2019
Highest in the city: 53.7 µg/L — TIMBERLAND MOBILE HOME PARK · 60 people · 2018 | 3/8 | SYR4 |
| Chloroform | 17 µg/L No EPA limit set Main supplier: SLIDELL WATER SUPPLY · 35,547 people · 2019
Highest in the city: 51.785 µg/L — INDIAN HILLS TRAILER PARK · 100 people · 2019 | 7/8 | SYR4 |
| Bromoform | 28.95 µg/L No EPA limit set Highest in the city: BAYOU LIBERTY WATER ASSOCIATION · 10,791 people · 2019 | 2/8 | SYR4 |
| Trichloroacetic Acid | 4.76 µg/L No EPA limit set Main supplier: SLIDELL WATER SUPPLY · 35,547 people · 2019
Highest in the city: 21.74 µg/L — INDIAN HILLS TRAILER PARK · 100 people · 2019 | 7/8 | SYR4 |
| Dichloroacetic Acid | 6.775 µg/L No EPA limit set Main supplier: SLIDELL WATER SUPPLY · 35,547 people · 2019
Highest in the city: 20.505 µg/L — TIMBERLAND MOBILE HOME PARK · 60 people · 2019 | 7/8 | SYR4 |
| Lithium | 17.3 µg/L No EPA limit set Main supplier: SLIDELL WATER SUPPLY · 35,547 people · 2025 | 2/8 | UCMR-5 |
| Bromodichloromethane | 5.15 µg/L No EPA limit set Main supplier: SLIDELL WATER SUPPLY · 35,547 people · 2019
Highest in the city: 13.1345 µg/L — INDIAN HILLS TRAILER PARK · 100 people · 2019 | 7/8 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 10.212 µg/L 170% of the EPA limit, at the 95th percentile of samples — 6 µg/L Main supplier: SLIDELL WATER SUPPLY · 35,547 people · 2019
Highest in the city: 10.437 µg/L — TIMBERLAND MOBILE HOME PARK · 60 people · 2018 | 5/8 | SYR4 |
| Dibromochloromethane | 4.32 µg/L No EPA limit set Main supplier: SLIDELL WATER SUPPLY · 35,547 people · 2019
Highest in the city: 9.72 µg/L — AZALEA LANE TRAILER PARK · 84 people · 2019 | 6/8 | SYR4 |
| Dibromoacetic Acid | 1.6 µg/L No EPA limit set Main supplier: SLIDELL WATER SUPPLY · 35,547 people · 2019
Highest in the city: 7.33 µg/L — BAYOU LIBERTY WATER ASSOCIATION · 10,791 people · 2019 | 6/8 | SYR4 |
| Monochloroacetic Acid | 6.768 µg/L No EPA limit set Main supplier: SLIDELL WATER SUPPLY · 35,547 people · 2019 | 6/8 | SYR4 |
| Lead | 4 µg/L 27% of the EPA limit 15 µg/L Main supplier: SLIDELL WATER SUPPLY · 35,547 people · 2019 | 7/8 | SYR4 |
| Dalapon | 3.765 µg/L 1.9% of the EPA limit 200 µg/L Main supplier: SLIDELL WATER SUPPLY · 35,547 people · 2019 | 3/8 | SYR4 |
| Gross Alpha, Excl. Radon And U | 3.07 pCi/L 20% of the EPA limit 15 pCi/L Main supplier: SLIDELL WATER SUPPLY · 35,547 people · 2016 | 1/8 | SYR4 |
| Gross Beta Particle Activity | 2.05 pCi/L No EPA limit set Main supplier: SLIDELL WATER SUPPLY · 35,547 people · 2019 | 4/8 | SYR4 |
| Arsenic | 1.875 µg/L 19% of the EPA limit 10 µg/L Highest in the city: TIMBERLAND MOBILE HOME PARK · 60 people · 2018 | 3/8 | SYR4 |
| Selenium | 1.498 µg/L 3% of the EPA limit 50 µg/L Main supplier: SLIDELL WATER SUPPLY · 35,547 people · 2019 | 1/8 | SYR4 |
| Dichloromethane | 1.2 µg/L 24% of the EPA limit 5 µg/L Main supplier: SLIDELL WATER SUPPLY · 35,547 people · 2019 | 1/8 | SYR4 |
| Combined Radium (-226 And -228) | 0.6817 pCi/L 14% of the EPA limit 5 pCi/L Main supplier: SLIDELL WATER SUPPLY · 35,547 people · 2019
Highest in the city: 0.8831 pCi/L — AZALEA LANE TRAILER PARK · 84 people · 2019 | 5/8 | SYR4 |
| Di(2-ethylhexyl) Adipate | 0.5600 µg/L 0.1% of the EPA limit 400 µg/L Main supplier: SLIDELL WATER SUPPLY · 35,547 people · 2019 | 1/8 | SYR4 |
| Pentachlorophenol | 0.2460 µg/L 25% of the EPA limit 1 µg/L Highest in the city: BAYOU LIBERTY WATER ASSOCIATION · 10,791 people · 2018 | 1/8 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: SLIDELL WATER SUPPLY · 35,547 people · 2024
Highest in the city: 0.0043 mg/L — AZALEA LANE TRAILER PARK · 84 people · 2025 | 8/8 | LCR |
Each bar shows the measured level as a share of the EPA limit: green is
well under, amber is close to it, red is over. For lead and copper the
limit applies to exactly the 90th-percentile figure shown, so red there
means a real exceedance. For everything else the limit applies to a
running annual average while the figure is the 95th percentile of the
system's samples — over 100% is worth reading, but is not by itself a
violation.
Formal violations are listed separately.
These are the utilities' own EPA-reported results, not a city-wide
average. A detection means the lab measured the
substance — it isn't the same as exceeding a legal limit. Hover a source
tag to see the EPA program and years behind each figure.
Water suppliers serving Slidell
| Supplier | Population served |
|---|---|
| SLIDELL WATER SUPPLY | 35,547 |
| BAYOU LIBERTY WATER ASSOCIATION | 10,791 |
| PINE CREST TRAILER PARK | 600 |
| CREEK PLACE APARTMENTS | 100 |
| INDIAN HILLS TRAILER PARK | 100 |
| AZALEA LANE TRAILER PARK | 84 |
| OZONE PINE SUBDIVISION | 75 |
| TIMBERLAND MOBILE HOME PARK | 60 |
Frequently asked questions about Slidell tap water
Is Slidell tap water safe to drink?
EPA testing detected 28 contaminants in the water serving Slidell. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.
How many water suppliers serve Slidell?
8 public water suppliers report drinking-water monitoring for Slidell, Louisiana to the EPA. Each is listed above with its population served.
What contaminants are in Slidell's water?
The contaminants EPA monitoring detected in Slidell include Fluoride, Nitrate-Nitrite, Copper, Monobromoacetic Acid, Total Haloacetic Acids (HAA5). The full list, with the level at the main supplier and the data source, is in the table above.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.