What was found in Castor'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 | 1545 µg/L 39% of the EPA limit 4000 µg/L Main supplier: ALBERTA WATER SYSTEM · 1,860 people · 2018 | 3/3 | SYR4 |
| Copper | 940 µg/L 72% of the EPA limit 1300 µg/L Main supplier: ALBERTA WATER SYSTEM · 1,860 people · 2018 | 3/3 | SYR4 |
| TTHM | 299 µg/L 374% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: ALBERTA WATER SYSTEM · 1,860 people · 2019 | 3/3 | SYR4 |
| Barium | 18.65 µg/L 0.9% of the EPA limit 2000 µg/L Main supplier: ALBERTA WATER SYSTEM · 1,860 people · 2018
Highest in the city: 289.35 µg/L — OLD SALINE COMMUNITY WATER SYSTEM · 390 people · 2018 | 3/3 | SYR4 |
| Chloroform | 261.75 µg/L No EPA limit set Main supplier: ALBERTA WATER SYSTEM · 1,860 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 215.7 µg/L 360% of the EPA limit, at the 95th percentile of samples — 60 µg/L Main supplier: ALBERTA WATER SYSTEM · 1,860 people · 2019 | 3/3 | SYR4 |
| Lead | 10.2 µg/L 68% of the EPA limit 15 µg/L Main supplier: ALBERTA WATER SYSTEM · 1,860 people · 2018
Highest in the city: 205.86 µg/L — OLD SALINE COMMUNITY WATER SYSTEM · 390 people · 2019 | 3/3 | SYR4 |
| Trichloroacetic Acid | 139.1 µg/L No EPA limit set Main supplier: ALBERTA WATER SYSTEM · 1,860 people · 2019 | 3/3 | SYR4 |
| Dichloroacetic Acid | 122.1 µg/L No EPA limit set Main supplier: ALBERTA WATER SYSTEM · 1,860 people · 2019 | 3/3 | SYR4 |
| Nitrate-Nitrite | 66 µg/L 0.7% of the EPA limit 10000 µg/L Main supplier: ALBERTA WATER SYSTEM · 1,860 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 34.46 µg/L No EPA limit set Main supplier: ALBERTA WATER SYSTEM · 1,860 people · 2019 | 3/3 | SYR4 |
| Monobromoacetic Acid | 1.4595 µg/L No EPA limit set Main supplier: ALBERTA WATER SYSTEM · 1,860 people · 2019
Highest in the city: 22.1 µg/L — VILLAGE OF CASTOR WATER SYSTEM · 435 people · 2019 | 3/3 | SYR4 |
| Dibromoacetic Acid | 4.2 µg/L No EPA limit set Main supplier: ALBERTA WATER SYSTEM · 1,860 people · 2019
Highest in the city: 10 µg/L — VILLAGE OF CASTOR WATER SYSTEM · 435 people · 2019 | 3/3 | SYR4 |
| Dibromochloromethane | 7.58 µg/L No EPA limit set Main supplier: ALBERTA WATER SYSTEM · 1,860 people · 2019
Highest in the city: 9.8 µg/L — OLD SALINE COMMUNITY WATER SYSTEM · 390 people · 2019 | 3/3 | SYR4 |
| Bromoform | 4.75 µg/L No EPA limit set Main supplier: ALBERTA WATER SYSTEM · 1,860 people · 2019
Highest in the city: 7.93 µg/L — OLD SALINE COMMUNITY WATER SYSTEM · 390 people · 2019 | 3/3 | SYR4 |
| Monochloroacetic Acid | 6.3 µg/L No EPA limit set Main supplier: ALBERTA WATER SYSTEM · 1,860 people · 2019 | 3/3 | SYR4 |
| Toluene | 5.4 µg/L 0.5% of the EPA limit 1000 µg/L Highest in the city: OLD SALINE COMMUNITY WATER SYSTEM · 390 people · 2017 | 1/3 | SYR4 |
| Selenium | 3.1 µg/L 6.2% of the EPA limit 50 µg/L Highest in the city: OLD SALINE COMMUNITY WATER SYSTEM · 390 people · 2018 | 1/3 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 2.918 µg/L 49% of the EPA limit 6 µg/L Main supplier: ALBERTA WATER SYSTEM · 1,860 people · 2018 | 3/3 | SYR4 |
| Cadmium | 2.8 µg/L 56% of the EPA limit 5 µg/L Highest in the city: OLD SALINE COMMUNITY WATER SYSTEM · 390 people · 2018 | 1/3 | SYR4 |
| Gross Beta Particle Activity | 2.72 pCi/L No EPA limit set Main supplier: ALBERTA WATER SYSTEM · 1,860 people · 2018 | 2/3 | SYR4 |
| Dalapon | 1.99 µg/L 1% of the EPA limit 200 µg/L Highest in the city: VILLAGE OF CASTOR WATER SYSTEM · 435 people · 2017 | 1/3 | SYR4 |
| Arsenic | 1 µg/L 10% of the EPA limit 10 µg/L Main supplier: ALBERTA WATER SYSTEM · 1,860 people · 2018
Highest in the city: 1.263 µg/L — OLD SALINE COMMUNITY WATER SYSTEM · 390 people · 2018 | 2/3 | SYR4 |
| Combined Radium (-226 And -228) | 0.7059 pCi/L 14% of the EPA limit 5 pCi/L Main supplier: ALBERTA WATER SYSTEM · 1,860 people · 2018 | 3/3 | SYR4 |
| Thallium, Total | 0.0939 µg/L 4.7% of the EPA limit 2 µg/L Highest in the city: OLD SALINE COMMUNITY WATER SYSTEM · 390 people · 2018 | 1/3 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: ALBERTA WATER SYSTEM · 1,860 people · 2023
Highest in the city: 0.0020 mg/L — OLD SALINE COMMUNITY WATER SYSTEM · 390 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 Castor
| Supplier | Population served |
|---|---|
| ALBERTA WATER SYSTEM | 1,860 |
| VILLAGE OF CASTOR WATER SYSTEM | 435 |
| OLD SALINE COMMUNITY WATER SYSTEM | 390 |
Frequently asked questions about Castor tap water
Is Castor tap water safe to drink?
EPA testing detected 26 contaminants in the water serving Castor. 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 Castor?
3 public water suppliers report drinking-water monitoring for Castor, Louisiana to the EPA. Each is listed above with its population served.
What contaminants are in Castor's water?
The contaminants EPA monitoring detected in Castor include Fluoride, Copper, TTHM, Barium, Chloroform. 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.