What was found in Downsville'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 |
|---|---|---|---|
| Copper | 330 µg/L 25% of the EPA limit 1300 µg/L Main supplier: HOLMESVILLE WATER SYSTEM · 2,406 people · 2018
Highest in the city: 500 µg/L — VILLAGE OF DOWNSVILLE WATER SYSTEM · 216 people · 2019 | 3/3 | SYR4 |
| Fluoride | 344 µg/L 8.6% of the EPA limit 4000 µg/L Main supplier: HOLMESVILLE WATER SYSTEM · 2,406 people · 2018
Highest in the city: 432 µg/L — VILLAGE OF DOWNSVILLE WATER SYSTEM · 216 people · 2019 | 3/3 | SYR4 |
| TTHM | 285.555 µg/L 357% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: HOLMESVILLE WATER SYSTEM · 2,406 people · 2019
Highest in the city: 290.74 µg/L — POINT WILHITE WS · 2,292 people · 2019 | 3/3 | SYR4 |
| Bromoform | 223 µg/L No EPA limit set Main supplier: HOLMESVILLE WATER SYSTEM · 2,406 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 40.525 µg/L 68% of the EPA limit 60 µg/L Main supplier: HOLMESVILLE WATER SYSTEM · 2,406 people · 2019
Highest in the city: 100.625 µg/L — VILLAGE OF DOWNSVILLE WATER SYSTEM · 216 people · 2019 | 3/3 | SYR4 |
| Chloroform | 12.5 µg/L No EPA limit set Main supplier: HOLMESVILLE WATER SYSTEM · 2,406 people · 2019
Highest in the city: 94.65 µg/L — VILLAGE OF DOWNSVILLE WATER SYSTEM · 216 people · 2019 | 3/3 | SYR4 |
| Dibromochloromethane | 68.055 µg/L No EPA limit set Main supplier: HOLMESVILLE WATER SYSTEM · 2,406 people · 2019
Highest in the city: 88.22 µg/L — POINT WILHITE WS · 2,292 people · 2019 | 3/3 | SYR4 |
| Dichloroacetic Acid | 5.16 µg/L No EPA limit set Main supplier: HOLMESVILLE WATER SYSTEM · 2,406 people · 2019
Highest in the city: 55.66 µg/L — VILLAGE OF DOWNSVILLE WATER SYSTEM · 216 people · 2019 | 3/3 | SYR4 |
| Nitrate-Nitrite | 38 µg/L 0.4% of the EPA limit 10000 µg/L Main supplier: HOLMESVILLE WATER SYSTEM · 2,406 people · 2019
Highest in the city: 44 µg/L — VILLAGE OF DOWNSVILLE WATER SYSTEM · 216 people · 2019 | 2/3 | SYR4 |
| Bromodichloromethane | 16.96 µg/L No EPA limit set Main supplier: HOLMESVILLE WATER SYSTEM · 2,406 people · 2019
Highest in the city: 41.225 µg/L — VILLAGE OF DOWNSVILLE WATER SYSTEM · 216 people · 2019 | 3/3 | SYR4 |
| Dibromoacetic Acid | 39.88 µg/L No EPA limit set Main supplier: HOLMESVILLE WATER SYSTEM · 2,406 people · 2019 | 3/3 | SYR4 |
| Trichloroacetic Acid | 2.25 µg/L No EPA limit set Main supplier: HOLMESVILLE WATER SYSTEM · 2,406 people · 2019
Highest in the city: 39.16 µg/L — VILLAGE OF DOWNSVILLE WATER SYSTEM · 216 people · 2019 | 3/3 | SYR4 |
| Monobromoacetic Acid | 6.89 µg/L No EPA limit set Main supplier: HOLMESVILLE WATER SYSTEM · 2,406 people · 2019
Highest in the city: 17.28 µg/L — POINT WILHITE WS · 2,292 people · 2019 | 3/3 | SYR4 |
| Lead | 13.4 µg/L 89% of the EPA limit 15 µg/L Main supplier: HOLMESVILLE WATER SYSTEM · 2,406 people · 2018 | 3/3 | SYR4 |
| Chromium | 10 µg/L 10% of the EPA limit 100 µg/L Highest in the city: VILLAGE OF DOWNSVILLE WATER SYSTEM · 216 people · 2019 | 1/3 | SYR4 |
| Barium | 9.14 µg/L 0.5% of the EPA limit 2000 µg/L Main supplier: HOLMESVILLE WATER SYSTEM · 2,406 people · 2018 | 3/3 | SYR4 |
| Monochloroacetic Acid | 3.98 µg/L No EPA limit set Main supplier: HOLMESVILLE WATER SYSTEM · 2,406 people · 2019
Highest in the city: 6.495 µg/L — POINT WILHITE WS · 2,292 people · 2019 | 3/3 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 0.7845 µg/L 13% of the EPA limit 6 µg/L Main supplier: HOLMESVILLE WATER SYSTEM · 2,406 people · 2018
Highest in the city: 2.477 µg/L — VILLAGE OF DOWNSVILLE WATER SYSTEM · 216 people · 2019 | 3/3 | SYR4 |
| Gross Beta Particle Activity | 1.44 pCi/L No EPA limit set Highest in the city: VILLAGE OF DOWNSVILLE WATER SYSTEM · 216 people · 2019 | 1/3 | SYR4 |
| Combined Radium (-226 And -228) | 0.4120 pCi/L 8.2% of the EPA limit 5 pCi/L Main supplier: HOLMESVILLE WATER SYSTEM · 2,406 people · 2018
Highest in the city: 1.07 pCi/L — POINT WILHITE WS · 2,292 people · 2018 | 3/3 | SYR4 |
| Dalapon | 1.004 µg/L 0.5% of the EPA limit 200 µg/L Highest in the city: POINT WILHITE WS · 2,292 people · 2018 | 1/3 | SYR4 |
| Arsenic | 0.5395 µg/L 5.4% of the EPA limit 10 µg/L Main supplier: HOLMESVILLE WATER SYSTEM · 2,406 people · 2018
Highest in the city: 0.9810 µg/L — POINT WILHITE WS · 2,292 people · 2018 | 2/3 | SYR4 |
| Ethylbenzene | 0.5700 µg/L 0.1% of the EPA limit 700 µg/L Main supplier: HOLMESVILLE WATER SYSTEM · 2,406 people · 2018 | 1/3 | SYR4 |
| Hexachlorobenzene | 0.2100 µg/L 21% of the EPA limit 1 µg/L Highest in the city: VILLAGE OF DOWNSVILLE WATER SYSTEM · 216 people · 2019 | 1/3 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: HOLMESVILLE WATER SYSTEM · 2,406 people · 2024
Highest in the city: 0.0020 mg/L — VILLAGE OF DOWNSVILLE WATER SYSTEM · 216 people · 2024 | 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 Downsville
| Supplier | Population served |
|---|---|
| HOLMESVILLE WATER SYSTEM | 2,406 |
| POINT WILHITE WS | 2,292 |
| VILLAGE OF DOWNSVILLE WATER SYSTEM | 216 |
Frequently asked questions about Downsville tap water
Is Downsville tap water safe to drink?
EPA testing detected 25 contaminants in the water serving Downsville. 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 Downsville?
3 public water suppliers report drinking-water monitoring for Downsville, Louisiana to the EPA. Each is listed above with its population served.
What contaminants are in Downsville's water?
The contaminants EPA monitoring detected in Downsville include Copper, Fluoride, TTHM, Bromoform, 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.