What was found in Lockport'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 | 2155 µg/L 22% of the EPA limit 10000 µg/L Main supplier: LAFOURCHE WATER DISTRICT 1 · 81,609 people · 2019 | 1/1 | SYR4 |
| Fluoride | 862.5 µg/L 22% of the EPA limit 4000 µg/L Main supplier: LAFOURCHE WATER DISTRICT 1 · 81,609 people · 2019 | 1/1 | SYR4 |
| Copper | 305 µg/L 23% of the EPA limit 1300 µg/L Main supplier: LAFOURCHE WATER DISTRICT 1 · 81,609 people · 2019 | 1/1 | SYR4 |
| Barium | 63.55 µg/L 3.2% of the EPA limit 2000 µg/L Main supplier: LAFOURCHE WATER DISTRICT 1 · 81,609 people · 2019 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 48.495 µg/L 81% of the EPA limit 60 µg/L Main supplier: LAFOURCHE WATER DISTRICT 1 · 81,609 people · 2019 | 1/1 | SYR4 |
| Dichloroacetic Acid | 35 µg/L No EPA limit set Main supplier: LAFOURCHE WATER DISTRICT 1 · 81,609 people · 2019 | 1/1 | SYR4 |
| Dalapon | 33.828 µg/L 17% of the EPA limit 200 µg/L Main supplier: LAFOURCHE WATER DISTRICT 1 · 81,609 people · 2019 | 1/1 | SYR4 |
| TTHM | 25.085 µg/L 31% of the EPA limit 80 µg/L Main supplier: LAFOURCHE WATER DISTRICT 1 · 81,609 people · 2019 | 1/1 | SYR4 |
| Chloroform | 19.82 µg/L No EPA limit set Main supplier: LAFOURCHE WATER DISTRICT 1 · 81,609 people · 2019 | 1/1 | SYR4 |
| Trichloroacetic Acid | 12.85 µg/L No EPA limit set Main supplier: LAFOURCHE WATER DISTRICT 1 · 81,609 people · 2019 | 1/1 | SYR4 |
| Lithium | 12.5 µg/L No EPA limit set Main supplier: LAFOURCHE WATER DISTRICT 1 · 81,609 people · 2024 | 1/1 | UCMR-5 |
| Monobromoacetic Acid | 8.88 µg/L No EPA limit set Main supplier: LAFOURCHE WATER DISTRICT 1 · 81,609 people · 2019 | 1/1 | SYR4 |
| Selenium | 8.2 µg/L 16% of the EPA limit 50 µg/L Main supplier: LAFOURCHE WATER DISTRICT 1 · 81,609 people · 2019 | 1/1 | SYR4 |
| Bromodichloromethane | 5.57 µg/L No EPA limit set Main supplier: LAFOURCHE WATER DISTRICT 1 · 81,609 people · 2019 | 1/1 | SYR4 |
| Monochloroacetic Acid | 4.705 µg/L No EPA limit set Main supplier: LAFOURCHE WATER DISTRICT 1 · 81,609 people · 2019 | 1/1 | SYR4 |
| Lead | 4.35 µg/L 29% of the EPA limit 15 µg/L Main supplier: LAFOURCHE WATER DISTRICT 1 · 81,609 people · 2019 | 1/1 | SYR4 |
| Antimony, Total | 3.95 µg/L 66% of the EPA limit 6 µg/L Main supplier: LAFOURCHE WATER DISTRICT 1 · 81,609 people · 2019 | 1/1 | SYR4 |
| Gross Beta Particle Activity | 3.948 pCi/L No EPA limit set Main supplier: LAFOURCHE WATER DISTRICT 1 · 81,609 people · 2019 | 1/1 | SYR4 |
| Atrazine | 3.64 µg/L 121% of the EPA limit, at the 95th percentile of samples — 3 µg/L Main supplier: LAFOURCHE WATER DISTRICT 1 · 81,609 people · 2019 | 1/1 | SYR4 |
| Dibromoacetic Acid | 2.42 µg/L No EPA limit set Main supplier: LAFOURCHE WATER DISTRICT 1 · 81,609 people · 2019 | 1/1 | SYR4 |
| 2,4-D | 1.826 µg/L 2.6% of the EPA limit 70 µg/L Main supplier: LAFOURCHE WATER DISTRICT 1 · 81,609 people · 2019 | 1/1 | SYR4 |
| Dibromochloromethane | 1.6 µg/L No EPA limit set Main supplier: LAFOURCHE WATER DISTRICT 1 · 81,609 people · 2019 | 1/1 | SYR4 |
| Simazine | 1.1075 µg/L 28% of the EPA limit 4 µg/L Main supplier: LAFOURCHE WATER DISTRICT 1 · 81,609 people · 2019 | 1/1 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 1.044 µg/L 17% of the EPA limit 6 µg/L Main supplier: LAFOURCHE WATER DISTRICT 1 · 81,609 people · 2019 | 1/1 | SYR4 |
| Arsenic | 1 µg/L 10% of the EPA limit 10 µg/L Main supplier: LAFOURCHE WATER DISTRICT 1 · 81,609 people · 2019 | 1/1 | SYR4 |
| Carbon Tetrachloride | 0.7800 µg/L 16% of the EPA limit 5 µg/L Main supplier: LAFOURCHE WATER DISTRICT 1 · 81,609 people · 2019 | 1/1 | SYR4 |
| Bromoform | 0.7710 µg/L No EPA limit set Main supplier: LAFOURCHE WATER DISTRICT 1 · 81,609 people · 2019 | 1/1 | SYR4 |
| Combined Radium (-226 And -228) | 0.6440 pCi/L 13% of the EPA limit 5 pCi/L Main supplier: LAFOURCHE WATER DISTRICT 1 · 81,609 people · 2019 | 1/1 | SYR4 |
| Combined Uranium | 0.6365 µg/L 2.1% of the EPA limit 30 µg/L Main supplier: LAFOURCHE WATER DISTRICT 1 · 81,609 people · 2019 | 1/1 | SYR4 |
| Toluene | 0.5300 µg/L 0.1% of the EPA limit 1000 µg/L Main supplier: LAFOURCHE WATER DISTRICT 1 · 81,609 people · 2019 | 1/1 | SYR4 |
| Pfba | 0.0067 µg/L No EPA limit set Main supplier: LAFOURCHE WATER DISTRICT 1 · 81,609 people · 2024 | 1/1 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: LAFOURCHE WATER DISTRICT 1 · 81,609 people · 2025 | 1/1 | 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 Lockport
| Supplier | Population served |
|---|---|
| LAFOURCHE WATER DISTRICT 1 | 81,609 |
Frequently asked questions about Lockport tap water
Is Lockport tap water safe to drink?
EPA testing detected 32 contaminants in the water serving Lockport. 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 Lockport?
1 public water supplier report drinking-water monitoring for Lockport, Louisiana to the EPA. Each is listed above with its population served.
What contaminants are in Lockport's water?
The contaminants EPA monitoring detected in Lockport include Nitrate-Nitrite, Fluoride, Copper, Barium, 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.