What was found in Ponchatoula'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 |
|---|---|---|---|
| Nitrate-Nitrite | 400 µg/L 4% of the EPA limit 10000 µg/L Main supplier: CITY OF PONTCHATOULA WATER SYSTEM · 6,657 people · 2019 | 1/3 | SYR4 |
| Fluoride | 266 µg/L 6.7% of the EPA limit 4000 µg/L Main supplier: CITY OF PONTCHATOULA WATER SYSTEM · 6,657 people · 2018 | 2/3 | SYR4 |
| Copper | 260 µg/L 20% of the EPA limit 1300 µg/L Main supplier: CITY OF PONTCHATOULA WATER SYSTEM · 6,657 people · 2018 | 1/3 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 41.188 µg/L 686% of the EPA limit, at the 95th percentile of samples — 6 µg/L Main supplier: CITY OF PONTCHATOULA WATER SYSTEM · 6,657 people · 2018 | 1/3 | SYR4 |
| Barium | 28.5 µg/L 1.4% of the EPA limit 2000 µg/L Main supplier: CITY OF PONTCHATOULA WATER SYSTEM · 6,657 people · 2018 | 1/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 9.25 µg/L 15% of the EPA limit 60 µg/L Main supplier: CITY OF PONTCHATOULA WATER SYSTEM · 6,657 people · 2019
Highest in the city: 24.7 µg/L — LA CASA LLC · 540 people · 2019 | 2/3 | SYR4 |
| TTHM | 18.58 µg/L 23% of the EPA limit 80 µg/L Main supplier: CITY OF PONTCHATOULA WATER SYSTEM · 6,657 people · 2019 | 2/3 | SYR4 |
| Lithium | 17.6 µg/L No EPA limit set Main supplier: CITY OF PONTCHATOULA WATER SYSTEM · 6,657 people · 2023 | 1/3 | UCMR-5 |
| Trichloroacetic Acid | 1.4 µg/L No EPA limit set Main supplier: CITY OF PONTCHATOULA WATER SYSTEM · 6,657 people · 2019
Highest in the city: 12.67 µg/L — LA CASA LLC · 540 people · 2019 | 2/3 | SYR4 |
| Monochloroacetic Acid | 3.6 µg/L No EPA limit set Main supplier: CITY OF PONTCHATOULA WATER SYSTEM · 6,657 people · 2019
Highest in the city: 11.7 µg/L — LA CASA LLC · 540 people · 2019 | 2/3 | SYR4 |
| Dichloroacetic Acid | 3.02 µg/L No EPA limit set Main supplier: CITY OF PONTCHATOULA WATER SYSTEM · 6,657 people · 2019
Highest in the city: 8.985 µg/L — LA CASA LLC · 540 people · 2019 | 2/3 | SYR4 |
| Chloroform | 7.27 µg/L No EPA limit set Main supplier: CITY OF PONTCHATOULA WATER SYSTEM · 6,657 people · 2019 | 2/3 | SYR4 |
| Bromodichloromethane | 6.4 µg/L No EPA limit set Main supplier: CITY OF PONTCHATOULA WATER SYSTEM · 6,657 people · 2019 | 2/3 | SYR4 |
| Dibromochloromethane | 4.9 µg/L No EPA limit set Main supplier: CITY OF PONTCHATOULA WATER SYSTEM · 6,657 people · 2019 | 2/3 | SYR4 |
| Lead | 1 µg/L 6.7% of the EPA limit 15 µg/L Main supplier: CITY OF PONTCHATOULA WATER SYSTEM · 6,657 people · 2018
Highest in the city: 4.3 µg/L — LA CASA LLC · 540 people · 2019 | 2/3 | SYR4 |
| Dalapon | 3.82 µg/L 1.9% of the EPA limit 200 µg/L Highest in the city: LA CASA LLC · 540 people · 2019 | 1/3 | SYR4 |
| Gross Alpha, Excl. Radon And U | 3.26 pCi/L 22% of the EPA limit 15 pCi/L Highest in the city: LA CASA LLC · 540 people · 2016 | 1/3 | SYR4 |
| Dibromoacetic Acid | 1.995 µg/L No EPA limit set Main supplier: CITY OF PONTCHATOULA WATER SYSTEM · 6,657 people · 2019
Highest in the city: 2.82 µg/L — LA CASA LLC · 540 people · 2019 | 2/3 | SYR4 |
| Bromoform | 0.8860 µg/L No EPA limit set Main supplier: CITY OF PONTCHATOULA WATER SYSTEM · 6,657 people · 2019
Highest in the city: 1.8 µg/L — LA CASA LLC · 540 people · 2019 | 2/3 | SYR4 |
| Gross Beta Particle Activity | 1.7 pCi/L No EPA limit set Highest in the city: LA CASA LLC · 540 people · 2019 | 1/3 | SYR4 |
| Monobromoacetic Acid | 1.3 µg/L No EPA limit set Highest in the city: LA CASA LLC · 540 people · 2019 | 1/3 | SYR4 |
| Combined Radium (-226 And -228) | 1.08 pCi/L 22% of the EPA limit 5 pCi/L Main supplier: CITY OF PONTCHATOULA WATER SYSTEM · 6,657 people · 2018 | 1/3 | SYR4 |
| Arsenic | 0.5575 µg/L 5.6% of the EPA limit 10 µg/L Main supplier: CITY OF PONTCHATOULA WATER SYSTEM · 6,657 people · 2018 | 1/3 | SYR4 |
| P-Dichlorobenzene | 0.5400 µg/L 0.7% of the EPA limit 75 µg/L Main supplier: CITY OF PONTCHATOULA WATER SYSTEM · 6,657 people · 2018 | 1/3 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: CITY OF PONTCHATOULA WATER SYSTEM · 6,657 people · 2023
Highest in the city: 0.00097 mg/L — LA CASA LLC · 540 people · 2025 | 3/3 | 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 Ponchatoula
| Supplier | Population served |
|---|---|
| CITY OF PONTCHATOULA WATER SYSTEM | 6,657 |
| LA CASA LLC | 540 |
| WEST YELLOW WATER MH PARK | 174 |
Frequently asked questions about Ponchatoula tap water
Is Ponchatoula tap water safe to drink?
EPA testing detected 25 contaminants in the water serving Ponchatoula. 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 Ponchatoula?
3 public water suppliers report drinking-water monitoring for Ponchatoula, Louisiana to the EPA. Each is listed above with its population served.
What contaminants are in Ponchatoula's water?
The contaminants EPA monitoring detected in Ponchatoula include Nitrate-Nitrite, Fluoride, Copper, Di(2-ethylhexyl) Phthalate, Barium. 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.