What was found in Plaquemine'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 | 1000 µg/L 10% of the EPA limit 10000 µg/L Main supplier: CITY OF PLAQUEMINE WATER SYSTEM · 14,043 people · 2019
Highest in the city: 2000 µg/L — INTRACOASTAL WATER SYSTEM WEST · 6,489 people · 2019 | 3/6 | SYR4 |
| Copper | 115 µg/L 8.8% of the EPA limit 1300 µg/L Main supplier: CITY OF PLAQUEMINE WATER SYSTEM · 14,043 people · 2019
Highest in the city: 1095 µg/L — INTRACOASTAL WATER SYSTEM WEST · 6,489 people · 2019 | 6/6 | SYR4 |
| Fluoride | 700 µg/L 18% of the EPA limit 4000 µg/L Main supplier: CITY OF PLAQUEMINE WATER SYSTEM · 14,043 people · 2019 | 3/6 | SYR4 |
| Barium | 373 µg/L 19% of the EPA limit 2000 µg/L Main supplier: CITY OF PLAQUEMINE WATER SYSTEM · 14,043 people · 2019
Highest in the city: 468 µg/L — INTRACOASTAL WATER SYSTEM WEST · 6,489 people · 2019 | 2/6 | SYR4 |
| TTHM | 4.54 µg/L 5.7% of the EPA limit 80 µg/L Main supplier: CITY OF PLAQUEMINE WATER SYSTEM · 14,043 people · 2019
Highest in the city: 98.525 µg/L — INTRACOASTAL WATER SYSTEM WEST · 6,489 people · 2019 | 6/6 | SYR4 |
| Chloroform | 3.845 µg/L No EPA limit set Main supplier: CITY OF PLAQUEMINE WATER SYSTEM · 14,043 people · 2019
Highest in the city: 86.42 µg/L — INTRACOASTAL WATER SYSTEM WEST · 6,489 people · 2019 | 6/6 | SYR4 |
| Total Haloacetic Acids (HAA5) | 7.2 µg/L 12% of the EPA limit 60 µg/L Main supplier: CITY OF PLAQUEMINE WATER SYSTEM · 14,043 people · 2019
Highest in the city: 82.65 µg/L — INTRACOASTAL WATER SYSTEM WEST · 6,489 people · 2019 | 6/6 | SYR4 |
| Dichloroacetic Acid | 5.34 µg/L No EPA limit set Main supplier: CITY OF PLAQUEMINE WATER SYSTEM · 14,043 people · 2019
Highest in the city: 47.075 µg/L — INTRACOASTAL WATER SYSTEM WEST · 6,489 people · 2019 | 6/6 | SYR4 |
| Dalapon | 37.0191 µg/L 19% of the EPA limit 200 µg/L Highest in the city: INTRACOASTAL WATER SYSTEM WEST · 6,489 people · 2019 | 2/6 | SYR4 |
| Trichloroacetic Acid | 1.38 µg/L No EPA limit set Main supplier: CITY OF PLAQUEMINE WATER SYSTEM · 14,043 people · 2019
Highest in the city: 35.98 µg/L — INTRACOASTAL WATER SYSTEM WEST · 6,489 people · 2019 | 6/6 | SYR4 |
| Arsenic | 26.6 µg/L 266% of the EPA limit, at the 95th percentile of samples — 10 µg/L Main supplier: CITY OF PLAQUEMINE WATER SYSTEM · 14,043 people · 2019 | 2/6 | SYR4 |
| Bromodichloromethane | 2.14 µg/L No EPA limit set Main supplier: CITY OF PLAQUEMINE WATER SYSTEM · 14,043 people · 2019
Highest in the city: 22.6 µg/L — INTRACOASTAL WATER SYSTEM WEST · 6,489 people · 2019 | 5/6 | SYR4 |
| Lithium | 21 µg/L No EPA limit set Main supplier: CITY OF PLAQUEMINE WATER SYSTEM · 14,043 people · 2024 | 3/6 | UCMR-5 |
| Lead | 17.45 µg/L 116% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: CITY OF PLAQUEMINE WATER SYSTEM · 14,043 people · 2019 | 6/6 | SYR4 |
| Dibromochloromethane | 1.048 µg/L No EPA limit set Main supplier: CITY OF PLAQUEMINE WATER SYSTEM · 14,043 people · 2019
Highest in the city: 12.5 µg/L — INTRACOASTAL WATER SYSTEM WEST · 6,489 people · 2019 | 5/6 | SYR4 |
| Chromium | 10 µg/L 10% of the EPA limit 100 µg/L Main supplier: CITY OF PLAQUEMINE WATER SYSTEM · 14,043 people · 2019 | 1/6 | SYR4 |
| Monochloroacetic Acid | 2.8 µg/L No EPA limit set Main supplier: CITY OF PLAQUEMINE WATER SYSTEM · 14,043 people · 2019
Highest in the city: 8.77 µg/L — INTRACOASTAL WATER SYSTEM WEST · 6,489 people · 2019 | 3/6 | SYR4 |
| Xylenes, Total | 7.202 µg/L 0.1% of the EPA limit 10000 µg/L Highest in the city: INTRACOASTAL WATER SYSTEM WEST · 6,489 people · 2019 | 1/6 | SYR4 |
| Monobromoacetic Acid | 1.65 µg/L No EPA limit set Main supplier: CITY OF PLAQUEMINE WATER SYSTEM · 14,043 people · 2019
Highest in the city: 6.56 µg/L — INTRACOASTAL WATER SYSTEM WEST · 6,489 people · 2019 | 3/6 | SYR4 |
| Dibromoacetic Acid | 1.1 µg/L No EPA limit set Main supplier: CITY OF PLAQUEMINE WATER SYSTEM · 14,043 people · 2019
Highest in the city: 5.49 µg/L — INTRACOASTAL WATER SYSTEM EAST · 2,940 people · 2019 | 5/6 | SYR4 |
| Gross Alpha, Excl. Radon And U | 4.614 pCi/L 31% of the EPA limit 15 pCi/L Main supplier: CITY OF PLAQUEMINE WATER SYSTEM · 14,043 people · 2016 | 1/6 | SYR4 |
| Gross Beta Particle Activity | 3.349 pCi/L No EPA limit set Main supplier: CITY OF PLAQUEMINE WATER SYSTEM · 14,043 people · 2019
Highest in the city: 4 pCi/L — INTRACOASTAL WATER SYSTEM WEST · 6,489 people · 2019 | 2/6 | SYR4 |
| Atrazine | 3.72 µg/L 124% of the EPA limit, at the 95th percentile of samples — 3 µg/L Highest in the city: INTRACOASTAL WATER SYSTEM WEST · 6,489 people · 2019 | 1/6 | SYR4 |
| Combined Radium (-226 And -228) | 1.5405 pCi/L 31% of the EPA limit 5 pCi/L Main supplier: CITY OF PLAQUEMINE WATER SYSTEM · 14,043 people · 2019
Highest in the city: 2.312 pCi/L — INTRACOASTAL WATER SYSTEM WEST · 6,489 people · 2019 | 3/6 | SYR4 |
| 1,2-Dichloroethane | 2.1685 µg/L 43% of the EPA limit 5 µg/L Main supplier: CITY OF PLAQUEMINE WATER SYSTEM · 14,043 people · 2019 | 1/6 | SYR4 |
| Carbon Tetrachloride | 2.002 µg/L 40% of the EPA limit 5 µg/L Highest in the city: INTRACOASTAL WATER SYSTEM WEST · 6,489 people · 2019 | 1/6 | SYR4 |
| Bromoform | 0.4700 µg/L No EPA limit set Main supplier: CITY OF PLAQUEMINE WATER SYSTEM · 14,043 people · 2019
Highest in the city: 2 µg/L — INTRACOASTAL WATER SYSTEM WEST · 6,489 people · 2019 | 3/6 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 0.9960 µg/L 17% of the EPA limit 6 µg/L Main supplier: CITY OF PLAQUEMINE WATER SYSTEM · 14,043 people · 2019
Highest in the city: 1.573 µg/L — INTRACOASTAL WATER SYSTEM WEST · 6,489 people · 2019 | 3/6 | SYR4 |
| cis-1,2-Dichloroethylene | 1.4675 µg/L 2.1% of the EPA limit 70 µg/L Main supplier: CITY OF PLAQUEMINE WATER SYSTEM · 14,043 people · 2019 | 1/6 | SYR4 |
| Diquat | 1.1 µg/L 5.5% of the EPA limit 20 µg/L Highest in the city: INTRACOASTAL WATER SYSTEM WEST · 6,489 people · 2019 | 1/6 | SYR4 |
| Hexachlorocyclopentadiene | 0.8420 µg/L 1.7% of the EPA limit 50 µg/L Highest in the city: INTRACOASTAL WATER SYSTEM WEST · 6,489 people · 2019 | 1/6 | SYR4 |
| Ethylbenzene | 0.6530 µg/L 0.1% of the EPA limit 700 µg/L Highest in the city: INTRACOASTAL WATER SYSTEM WEST · 6,489 people · 2019 | 1/6 | SYR4 |
| Vinyl Chloride | 0.5760 µg/L 29% of the EPA limit 2 µg/L Main supplier: CITY OF PLAQUEMINE WATER SYSTEM · 14,043 people · 2019 | 1/6 | SYR4 |
| 2,4-D | 0.3900 µg/L 0.6% of the EPA limit 70 µg/L Highest in the city: INTRACOASTAL WATER SYSTEM WEST · 6,489 people · 2019 | 1/6 | SYR4 |
| Hexachlorobenzene | 0.0980 µg/L 9.8% of the EPA limit 1 µg/L Main supplier: CITY OF PLAQUEMINE WATER SYSTEM · 14,043 people · 2019 | 1/6 | SYR4 |
| Pfba | 0.0142 µg/L No EPA limit set Main supplier: CITY OF PLAQUEMINE WATER SYSTEM · 14,043 people · 2024 | 2/6 | UCMR-5 |
| PFOA | 0.0062 µg/L No EPA limit set Main supplier: CITY OF PLAQUEMINE WATER SYSTEM · 14,043 people · 2024 | 1/6 | UCMR-5 |
| PFOS | 0.0060 µg/L No EPA limit set Main supplier: CITY OF PLAQUEMINE WATER SYSTEM · 14,043 people · 2024 | 1/6 | UCMR-5 |
| Pfpea | 0.0032 µg/L No EPA limit set Main supplier: CITY OF PLAQUEMINE WATER SYSTEM · 14,043 people · 2024 | 1/6 | UCMR-5 |
| PFBS | 0.0030 µg/L No EPA limit set Main supplier: CITY OF PLAQUEMINE WATER SYSTEM · 14,043 people · 2024 | 1/6 | UCMR-5 |
| Lead | 0.0010 mg/L 6.7% of the EPA limit 0.0150 mg/L Main supplier: CITY OF PLAQUEMINE WATER SYSTEM · 14,043 people · 2023 | 6/6 | 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 Plaquemine
| Supplier | Population served |
|---|---|
| CITY OF PLAQUEMINE WATER SYSTEM | 14,043 |
| EAST IBERVILLE WATER SYSTEM | 6,657 |
| INTRACOASTAL WATER SYSTEM WEST | 6,489 |
| INTRACOASTAL WATER SYSTEM EAST | 2,940 |
| NORTH IBERVILLE WATER SYSTEM | 1,524 |
| HIGHWAY 1148 WATER SYSTEM | 1,086 |
Frequently asked questions about Plaquemine tap water
Is Plaquemine tap water safe to drink?
EPA testing detected 41 contaminants in the water serving Plaquemine. 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 Plaquemine?
6 public water suppliers report drinking-water monitoring for Plaquemine, Louisiana to the EPA. Each is listed above with its population served.
What contaminants are in Plaquemine's water?
The contaminants EPA monitoring detected in Plaquemine include Nitrate-Nitrite, Copper, Fluoride, Barium, TTHM. 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.