What was found in Marksville'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 | 1875 µg/L 47% of the EPA limit 4000 µg/L Highest in the city: BROUILLETTE WATER SYSTEM INC · 3,732 people · 2019 | 2/4 | SYR4 |
| Copper | 400 µg/L 31% of the EPA limit 1300 µg/L Main supplier: CITY OF MARKSVILLE WATER SYSTEM · 7,593 people · 2017
Highest in the city: 415 µg/L — SPRING BAYOU WATER WORKS DISTRICT · 795 people · 2019 | 4/4 | SYR4 |
| TTHM | 51.615 µg/L 65% of the EPA limit 80 µg/L Main supplier: CITY OF MARKSVILLE WATER SYSTEM · 7,593 people · 2019
Highest in the city: 98.35 µg/L — FIFTH WARD WATER SYSTEM · 5,676 people · 2019 | 4/4 | SYR4 |
| Chloroform | 21.7 µg/L No EPA limit set Main supplier: CITY OF MARKSVILLE WATER SYSTEM · 7,593 people · 2019
Highest in the city: 61.75 µg/L — FIFTH WARD WATER SYSTEM · 5,676 people · 2019 | 4/4 | SYR4 |
| Barium | 45.15 µg/L 2.3% of the EPA limit 2000 µg/L Highest in the city: FIFTH WARD WATER SYSTEM · 5,676 people · 2018 | 2/4 | SYR4 |
| Nitrate-Nitrite | 41 µg/L 0.4% of the EPA limit 10000 µg/L Highest in the city: FIFTH WARD WATER SYSTEM · 5,676 people · 2019 | 1/4 | SYR4 |
| Total Haloacetic Acids (HAA5) | 25.51 µg/L 43% of the EPA limit 60 µg/L Main supplier: CITY OF MARKSVILLE WATER SYSTEM · 7,593 people · 2019
Highest in the city: 38.25 µg/L — FIFTH WARD WATER SYSTEM · 5,676 people · 2019 | 4/4 | SYR4 |
| Bromodichloromethane | 18.17 µg/L No EPA limit set Main supplier: CITY OF MARKSVILLE WATER SYSTEM · 7,593 people · 2019
Highest in the city: 28.9 µg/L — FIFTH WARD WATER SYSTEM · 5,676 people · 2019 | 4/4 | SYR4 |
| Lithium | 22.5 µg/L No EPA limit set Main supplier: CITY OF MARKSVILLE WATER SYSTEM · 7,593 people · 2025
Highest in the city: 24.7 µg/L — FIFTH WARD WATER SYSTEM · 5,676 people · 2025 | 3/4 | UCMR-5 |
| Trichloroacetic Acid | 9.945 µg/L No EPA limit set Main supplier: CITY OF MARKSVILLE WATER SYSTEM · 7,593 people · 2019
Highest in the city: 18.05 µg/L — FIFTH WARD WATER SYSTEM · 5,676 people · 2019 | 4/4 | SYR4 |
| Dibromochloromethane | 12.645 µg/L No EPA limit set Main supplier: CITY OF MARKSVILLE WATER SYSTEM · 7,593 people · 2019
Highest in the city: 17.85 µg/L — FIFTH WARD WATER SYSTEM · 5,676 people · 2019 | 4/4 | SYR4 |
| Dichloroacetic Acid | 11.715 µg/L No EPA limit set Main supplier: CITY OF MARKSVILLE WATER SYSTEM · 7,593 people · 2019
Highest in the city: 17.7 µg/L — FIFTH WARD WATER SYSTEM · 5,676 people · 2019 | 4/4 | SYR4 |
| Monochloroacetic Acid | 6.56 µg/L No EPA limit set Main supplier: CITY OF MARKSVILLE WATER SYSTEM · 7,593 people · 2019
Highest in the city: 9.88 µg/L — FIFTH WARD WATER SYSTEM · 5,676 people · 2019 | 4/4 | SYR4 |
| Lead | 3.45 µg/L 23% of the EPA limit 15 µg/L Main supplier: CITY OF MARKSVILLE WATER SYSTEM · 7,593 people · 2017
Highest in the city: 6.2 µg/L — SPRING BAYOU WATER WORKS DISTRICT · 795 people · 2019 | 4/4 | SYR4 |
| Bromoform | 1.4 µg/L No EPA limit set Main supplier: CITY OF MARKSVILLE WATER SYSTEM · 7,593 people · 2019
Highest in the city: 4.9465 µg/L — SPRING BAYOU WATER WORKS DISTRICT · 795 people · 2019 | 3/4 | SYR4 |
| Dibromoacetic Acid | 3.835 µg/L No EPA limit set Main supplier: CITY OF MARKSVILLE WATER SYSTEM · 7,593 people · 2019
Highest in the city: 4.9 µg/L — SPRING BAYOU WATER WORKS DISTRICT · 795 people · 2019 | 4/4 | SYR4 |
| Gross Alpha, Excl. Radon And U | 3 pCi/L 20% of the EPA limit 15 pCi/L Highest in the city: BROUILLETTE WATER SYSTEM INC · 3,732 people · 2012 | 1/4 | SYR4 |
| Gross Beta Particle Activity | 2.497 pCi/L No EPA limit set Highest in the city: BROUILLETTE WATER SYSTEM INC · 3,732 people · 2019 | 1/4 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 0.9965 µg/L 17% of the EPA limit 6 µg/L Highest in the city: FIFTH WARD WATER SYSTEM · 5,676 people · 2018 | 2/4 | SYR4 |
| Monobromoacetic Acid | 0.9920 µg/L No EPA limit set Highest in the city: FIFTH WARD WATER SYSTEM · 5,676 people · 2019 | 2/4 | SYR4 |
| Arsenic | 0.8800 µg/L 8.8% of the EPA limit 10 µg/L Highest in the city: FIFTH WARD WATER SYSTEM · 5,676 people · 2018 | 1/4 | SYR4 |
| Combined Radium (-226 And -228) | 0.6038 pCi/L 12% of the EPA limit 5 pCi/L Highest in the city: FIFTH WARD WATER SYSTEM · 5,676 people · 2018 | 1/4 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: CITY OF MARKSVILLE WATER SYSTEM · 7,593 people · 2023
Highest in the city: 0.0010 mg/L — FIFTH WARD WATER SYSTEM · 5,676 people · 2023 | 4/4 | 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 Marksville
| Supplier | Population served |
|---|---|
| CITY OF MARKSVILLE WATER SYSTEM | 7,593 |
| FIFTH WARD WATER SYSTEM | 5,676 |
| BROUILLETTE WATER SYSTEM INC | 3,732 |
| SPRING BAYOU WATER WORKS DISTRICT | 795 |
Frequently asked questions about Marksville tap water
Is Marksville tap water safe to drink?
EPA testing detected 23 contaminants in the water serving Marksville. 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 Marksville?
4 public water suppliers report drinking-water monitoring for Marksville, Louisiana to the EPA. Each is listed above with its population served.
What contaminants are in Marksville's water?
The contaminants EPA monitoring detected in Marksville include Fluoride, Copper, TTHM, Chloroform, 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.