What was found in Ferriday'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 | 230 µg/L 2.3% of the EPA limit 10000 µg/L Main supplier: CONCORDIA WATERWORKS DISTRICT 1 · 6,921 people · 2019
Highest in the city: 1700 µg/L — TOWN OF FERRIDAY WATER SYSTEM · 3,816 people · 2019 | 2/3 | SYR4 |
| Fluoride | 1500 µg/L 38% of the EPA limit 4000 µg/L Main supplier: CONCORDIA WATERWORKS DISTRICT 1 · 6,921 people · 2017 | 3/3 | SYR4 |
| Copper | 300 µg/L 23% of the EPA limit 1300 µg/L Main supplier: CONCORDIA WATERWORKS DISTRICT 1 · 6,921 people · 2017
Highest in the city: 1040 µg/L — TOWN OF FERRIDAY WATER SYSTEM · 3,816 people · 2019 | 3/3 | SYR4 |
| Barium | 9.775 µg/L 0.5% of the EPA limit 2000 µg/L Main supplier: CONCORDIA WATERWORKS DISTRICT 1 · 6,921 people · 2017
Highest in the city: 990 µg/L — TOWN OF FERRIDAY WATER SYSTEM · 3,816 people · 2019 | 3/3 | SYR4 |
| TTHM | 68.275 µg/L 85% of the EPA limit 80 µg/L Main supplier: CONCORDIA WATERWORKS DISTRICT 1 · 6,921 people · 2019
Highest in the city: 187 µg/L — TOWN OF FERRIDAY WATER SYSTEM · 3,816 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 27.45 µg/L 46% of the EPA limit 60 µg/L Main supplier: CONCORDIA WATERWORKS DISTRICT 1 · 6,921 people · 2019
Highest in the city: 171 µg/L — TOWN OF FERRIDAY WATER SYSTEM · 3,816 people · 2019 | 3/3 | SYR4 |
| Chloroform | 31.925 µg/L No EPA limit set Main supplier: CONCORDIA WATERWORKS DISTRICT 1 · 6,921 people · 2019
Highest in the city: 139.3 µg/L — TOWN OF FERRIDAY WATER SYSTEM · 3,816 people · 2019 | 3/3 | SYR4 |
| Monochloroacetic Acid | 5.05 µg/L No EPA limit set Main supplier: CONCORDIA WATERWORKS DISTRICT 1 · 6,921 people · 2019
Highest in the city: 89.2 µg/L — TOWN OF FERRIDAY WATER SYSTEM · 3,816 people · 2019 | 3/3 | SYR4 |
| Trichloroacetic Acid | 8.925 µg/L No EPA limit set Main supplier: CONCORDIA WATERWORKS DISTRICT 1 · 6,921 people · 2019
Highest in the city: 67.48 µg/L — LAKE ST JOHN WATERWORKS DISTRICT 1 · 2,067 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 23.375 µg/L No EPA limit set Main supplier: CONCORDIA WATERWORKS DISTRICT 1 · 6,921 people · 2019
Highest in the city: 46.53 µg/L — TOWN OF FERRIDAY WATER SYSTEM · 3,816 people · 2019 | 3/3 | SYR4 |
| Dichloroacetic Acid | 11.9 µg/L No EPA limit set Main supplier: CONCORDIA WATERWORKS DISTRICT 1 · 6,921 people · 2019
Highest in the city: 39.54 µg/L — LAKE ST JOHN WATERWORKS DISTRICT 1 · 2,067 people · 2019 | 3/3 | SYR4 |
| Lithium | 22.4 µg/L No EPA limit set Main supplier: CONCORDIA WATERWORKS DISTRICT 1 · 6,921 people · 2024 | 2/3 | UCMR-5 |
| Arsenic | 5.465 µg/L 55% of the EPA limit 10 µg/L Main supplier: CONCORDIA WATERWORKS DISTRICT 1 · 6,921 people · 2018
Highest in the city: 18.85 µg/L — TOWN OF FERRIDAY WATER SYSTEM · 3,816 people · 2019 | 2/3 | SYR4 |
| Dibromochloromethane | 14.25 µg/L No EPA limit set Main supplier: CONCORDIA WATERWORKS DISTRICT 1 · 6,921 people · 2019
Highest in the city: 16.3 µg/L — TOWN OF FERRIDAY WATER SYSTEM · 3,816 people · 2019 | 3/3 | SYR4 |
| Lead | 5.75 µg/L 38% of the EPA limit 15 µg/L Main supplier: CONCORDIA WATERWORKS DISTRICT 1 · 6,921 people · 2018
Highest in the city: 12.5 µg/L — TOWN OF FERRIDAY WATER SYSTEM · 3,816 people · 2019 | 3/3 | SYR4 |
| Dalapon | 2.35 µg/L 1.2% of the EPA limit 200 µg/L Main supplier: CONCORDIA WATERWORKS DISTRICT 1 · 6,921 people · 2017
Highest in the city: 8.8646 µg/L — TOWN OF FERRIDAY WATER SYSTEM · 3,816 people · 2019 | 2/3 | SYR4 |
| Monobromoacetic Acid | 2.7 µg/L No EPA limit set Main supplier: CONCORDIA WATERWORKS DISTRICT 1 · 6,921 people · 2019
Highest in the city: 7.307 µg/L — LAKE ST JOHN WATERWORKS DISTRICT 1 · 2,067 people · 2019 | 3/3 | SYR4 |
| Thallium, Total | 7 µg/L 350% of the EPA limit, at the 95th percentile of samples — 2 µg/L Main supplier: CONCORDIA WATERWORKS DISTRICT 1 · 6,921 people · 2017 | 1/3 | SYR4 |
| Gross Beta Particle Activity | 2.451 pCi/L No EPA limit set Main supplier: CONCORDIA WATERWORKS DISTRICT 1 · 6,921 people · 2017
Highest in the city: 6.254 pCi/L — TOWN OF FERRIDAY WATER SYSTEM · 3,816 people · 2019 | 3/3 | SYR4 |
| Dibromoacetic Acid | 3.4 µg/L No EPA limit set Main supplier: CONCORDIA WATERWORKS DISTRICT 1 · 6,921 people · 2019
Highest in the city: 4.45 µg/L — TOWN OF FERRIDAY WATER SYSTEM · 3,816 people · 2019 | 3/3 | SYR4 |
| Gross Alpha, Excl. Radon And U | 3 pCi/L 20% of the EPA limit 15 pCi/L Main supplier: CONCORDIA WATERWORKS DISTRICT 1 · 6,921 people · 2014
Highest in the city: 3.762 pCi/L — TOWN OF FERRIDAY WATER SYSTEM · 3,816 people · 2016 | 3/3 | SYR4 |
| Combined Radium (-226 And -228) | 2.5865 pCi/L 52% of the EPA limit 5 pCi/L Highest in the city: TOWN OF FERRIDAY WATER SYSTEM · 3,816 people · 2019 | 2/3 | SYR4 |
| Bromoform | 1.4 µg/L No EPA limit set Main supplier: CONCORDIA WATERWORKS DISTRICT 1 · 6,921 people · 2019
Highest in the city: 2.3 µg/L — TOWN OF FERRIDAY WATER SYSTEM · 3,816 people · 2019 | 2/3 | SYR4 |
| Combined Uranium | 1.49 µg/L 5% of the EPA limit 30 µg/L Main supplier: CONCORDIA WATERWORKS DISTRICT 1 · 6,921 people · 2014 | 1/3 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 0.6040 µg/L 10% of the EPA limit 6 µg/L Main supplier: CONCORDIA WATERWORKS DISTRICT 1 · 6,921 people · 2017
Highest in the city: 1.076 µg/L — TOWN OF FERRIDAY WATER SYSTEM · 3,816 people · 2019 | 3/3 | SYR4 |
| Antimony, Total | 1 µg/L 17% of the EPA limit 6 µg/L Highest in the city: TOWN OF FERRIDAY WATER SYSTEM · 3,816 people · 2019 | 1/3 | SYR4 |
| Atrazine | 0.6935 µg/L 23% of the EPA limit 3 µg/L Highest in the city: TOWN OF FERRIDAY WATER SYSTEM · 3,816 people · 2019 | 1/3 | SYR4 |
| Di(2-ethylhexyl) Adipate | 0.5500 µg/L 0.1% of the EPA limit 400 µg/L Highest in the city: TOWN OF FERRIDAY WATER SYSTEM · 3,816 people · 2019 | 1/3 | SYR4 |
| Hexachlorocyclopentadiene | 0.0370 µg/L 0.1% of the EPA limit 50 µg/L Highest in the city: TOWN OF FERRIDAY WATER SYSTEM · 3,816 people · 2019 | 1/3 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: CONCORDIA WATERWORKS DISTRICT 1 · 6,921 people · 2023
Highest in the city: 0.0114 mg/L — TOWN OF FERRIDAY WATER SYSTEM · 3,816 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 Ferriday
| Supplier | Population served |
|---|---|
| CONCORDIA WATERWORKS DISTRICT 1 | 6,921 |
| TOWN OF FERRIDAY WATER SYSTEM | 3,816 |
| LAKE ST JOHN WATERWORKS DISTRICT 1 | 2,067 |
Frequently asked questions about Ferriday tap water
Is Ferriday tap water safe to drink?
EPA testing detected 30 contaminants in the water serving Ferriday. 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 Ferriday?
3 public water suppliers report drinking-water monitoring for Ferriday, Louisiana to the EPA. Each is listed above with its population served.
What contaminants are in Ferriday's water?
The contaminants EPA monitoring detected in Ferriday include Nitrate-Nitrite, Fluoride, Copper, 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.