What was found in Miami'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 | 467 µg/L 12% of the EPA limit 4000 µg/L Main supplier: MIAMI · 13,704 people · 2018
Highest in the city: 689.5 µg/L — OTTAWA CO RWD #6 · 560 people · 2019 | 3/3 | SYR4 |
| Copper | 193.75 µg/L 15% of the EPA limit 1300 µg/L Main supplier: MIAMI · 13,704 people · 2019 | 3/3 | SYR4 |
| Lithium | 89.2 µg/L No EPA limit set Main supplier: MIAMI · 13,704 people · 2025 | 1/3 | UCMR-5 |
| Barium | 37.95 µg/L 1.9% of the EPA limit 2000 µg/L Main supplier: MIAMI · 13,704 people · 2018
Highest in the city: 87.05 µg/L — QUAPAW TRIBE · 55 people · 2018 | 3/3 | SYR4 |
| TTHM | 24.975 µg/L 31% of the EPA limit 80 µg/L Main supplier: MIAMI · 13,704 people · 2019 | 3/3 | SYR4 |
| Lead | 23.835 µg/L 159% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: MIAMI · 13,704 people · 2019 | 1/3 | SYR4 |
| Gross Alpha, Excl. Radon And U | 8.952 pCi/L 60% of the EPA limit 15 pCi/L Main supplier: MIAMI · 13,704 people · 2019 | 3/3 | SYR4 |
| Gross Beta Particle Activity | 7.356 pCi/L No EPA limit set Main supplier: MIAMI · 13,704 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 6.726 µg/L 11% of the EPA limit 60 µg/L Main supplier: MIAMI · 13,704 people · 2019 | 1/3 | SYR4 |
| Bromoform | 6.7 µg/L No EPA limit set Main supplier: MIAMI · 13,704 people · 2019 | 3/3 | SYR4 |
| Combined Radium (-226 And -228) | 5.405 pCi/L 108% of the EPA limit, at the 95th percentile of samples — 5 pCi/L Main supplier: MIAMI · 13,704 people · 2019 | 3/3 | SYR4 |
| Dibromochloromethane | 4.9475 µg/L No EPA limit set Main supplier: MIAMI · 13,704 people · 2019 | 2/3 | SYR4 |
| Bromodichloromethane | 4.474 µg/L No EPA limit set Main supplier: MIAMI · 13,704 people · 2019 | 1/3 | SYR4 |
| Monochloroacetic Acid | 4.25 µg/L No EPA limit set Main supplier: MIAMI · 13,704 people · 2019 | 1/3 | SYR4 |
| Chloroform | 3.7325 µg/L No EPA limit set Main supplier: MIAMI · 13,704 people · 2019 | 1/3 | SYR4 |
| Dichloroacetic Acid | 3.603 µg/L No EPA limit set Main supplier: MIAMI · 13,704 people · 2019 | 1/3 | SYR4 |
| Dibromoacetic Acid | 2.761 µg/L No EPA limit set Main supplier: MIAMI · 13,704 people · 2019 | 1/3 | SYR4 |
| Carbon Tetrachloride | 0.6400 µg/L 13% of the EPA limit 5 µg/L Main supplier: MIAMI · 13,704 people · 2018 | 1/3 | SYR4 |
| Lead | 0.0021 mg/L 14% of the EPA limit 0.0150 mg/L Main supplier: MIAMI · 13,704 people · 2025 | 3/3 | LCR |
Water suppliers serving Miami
| Supplier | Population served |
|---|---|
| MIAMI | 13,704 |
| OTTAWA CO RWD #6 | 560 |
| QUAPAW TRIBE | 55 |
Frequently asked questions about Miami tap water
Is Miami tap water safe to drink?
EPA testing detected 19 contaminants in the water serving Miami. 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 Miami?
3 public water suppliers report drinking-water monitoring for Miami, Oklahoma to the EPA. Each is listed above with its population served.
What contaminants are in Miami's water?
The contaminants EPA monitoring detected in Miami include Fluoride, Copper, Lithium, 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.