What was found in Coushatta's water
The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Copper | 3600 µg/L 277% of the EPA limit, in the worst sample — 1300 µg/L | 9/9 | SYR4 |
| Nitrate-Nitrite | 1200 µg/L 12% of the EPA limit 10000 µg/L | 9/9 | SYR4 |
| Fluoride | 486 µg/L 12% of the EPA limit 4000 µg/L | 9/9 | SYR4 |
| Total Haloacetic Acids (HAA5) | 422 µg/L 703% of the EPA limit, in the worst sample — 60 µg/L | 9/9 | SYR4 |
| TTHM | 356.3 µg/L 445% of the EPA limit, in the worst sample — 80 µg/L | 9/9 | SYR4 |
| Barium | 350 µg/L 18% of the EPA limit 2000 µg/L | 9/9 | SYR4 |
| Chloroform | 346 µg/L No EPA limit set | 9/9 | SYR4 |
| Trichloroacetic Acid | 272 µg/L No EPA limit set | 9/9 | SYR4 |
| Dalapon | 175.928 µg/L 88% of the EPA limit 200 µg/L | 2/9 | SYR4 |
| Dichloroacetic Acid | 153 µg/L No EPA limit set | 9/9 | SYR4 |
| Arsenic | 107 µg/L 1070% of the EPA limit, in the worst sample — 10 µg/L | 6/9 | SYR4 |
| Dibromochloromethane | 81.4 µg/L No EPA limit set | 9/9 | SYR4 |
| Bromoform | 59.3 µg/L No EPA limit set | 8/9 | SYR4 |
| Lead | 55 µg/L 367% of the EPA limit, in the worst sample — 15 µg/L | 9/9 | SYR4 |
| Lithium | 44.6 µg/L No EPA limit set | 1/9 | UCMR-5 |
| Bromodichloromethane | 37.1 µg/L No EPA limit set | 9/9 | SYR4 |
| Monochloroacetic Acid | 20 µg/L No EPA limit set | 8/9 | SYR4 |
| Dibromoacetic Acid | 19.5 µg/L No EPA limit set | 9/9 | SYR4 |
| Monobromoacetic Acid | 11.2 µg/L No EPA limit set | 7/9 | SYR4 |
| Gross Beta Particle Activity | 4 pCi/L No EPA limit set | 5/9 | SYR4 |
| Gross Alpha, Excl. Radon And U | 3.57 pCi/L 24% of the EPA limit 15 pCi/L | 1/9 | SYR4 |
| Combined Radium (-226 And -228) | 3.16 pCi/L 63% of the EPA limit 5 pCi/L | 8/9 | SYR4 |
| Selenium | 1.9 µg/L 3.8% of the EPA limit 50 µg/L | 4/9 | SYR4 |
| Combined Uranium | 1.49 µg/L 5% of the EPA limit 30 µg/L | 2/9 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 1.46 µg/L 24% of the EPA limit 6 µg/L | 7/9 | SYR4 |
| Carbon Tetrachloride | 1.23 µg/L 25% of the EPA limit 5 µg/L | 1/9 | SYR4 |
| Carbofuran | 0.3900 µg/L 1% of the EPA limit 40 µg/L | 1/9 | SYR4 |
| Di(2-ethylhexyl) Adipate | 0.3470 µg/L 0.1% of the EPA limit 400 µg/L | 1/9 | SYR4 |
| Toluene | 0.3000 µg/L 0% of the EPA limit 1000 µg/L | 2/9 | SYR4 |
| Hexachlorocyclopentadiene | 0.1450 µg/L 0.3% of the EPA limit 50 µg/L | 1/9 | SYR4 |
| Lead | 0.0136 mg/L 91% of the EPA limit 0.0150 mg/L | 9/9 | LCR |
Water suppliers serving Coushatta
| Supplier | Population served |
|---|---|
| TOWN OF COUSHATTA WATER SYSTEM | 3,300 |
| SLIGO WATER SYSTEM INCORPORATED | 2,850 |
| FAIRVIEW UNION WATER SYSTEM | 2,346 |
| BAYOU PIERRE WATER SYSTEM | 1,371 |
| MARTIN WATER SYSTEM | 1,350 |
| HICKORY GROVE WATER SYSTEM | 570 |
| HALFWAY-CARROLL WATER SYSTEM | 498 |
| EAST CROSS WATER SYSTEM | 453 |
| EDGEFIELD WATER SYSTEM | 375 |
Frequently asked questions about Coushatta tap water
Is Coushatta tap water safe to drink?
EPA testing detected 31 contaminants in the water serving Coushatta. 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 Coushatta?
9 public water suppliers report drinking-water monitoring for Coushatta, Louisiana to the EPA. Each is listed above with its population served.
What contaminants are in Coushatta's water?
The contaminants EPA monitoring detected in Coushatta include Copper, Nitrate-Nitrite, Fluoride, Total Haloacetic Acids (HAA5), TTHM. The full list, with the highest level found 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.