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 |
|---|---|---|---|
| Nitrate | 370 µg/L 3.7% of the EPA limit 10000 µg/L Main supplier: MDWASA - MAIN SYSTEM · 2,377,460 people · 2019
Highest in the city: 7000 µg/L — MDWASA/REX UTILITIES · 45,200 people · 2019 | 6/6 | SYR4 |
| Fluoride | 762 µg/L 19% of the EPA limit 4000 µg/L Main supplier: MDWASA - MAIN SYSTEM · 2,377,460 people · 2019 | 6/6 | SYR4 |
| Cyanide | 170 µg/L 85% of the EPA limit 200 µg/L Highest in the city: SILVER PALM MOBILE HOMES · 250 people · 2018 | 1/6 | SYR4 |
| TTHM | 70.6 µg/L 88% of the EPA limit 80 µg/L Main supplier: MDWASA - MAIN SYSTEM · 2,377,460 people · 2019
Highest in the city: 159.515 µg/L — AMERICANA VILLAGE · 2,500 people · 2019 | 6/6 | SYR4 |
| Total Haloacetic Acids (HAA5) | 45 µg/L 75% of the EPA limit 60 µg/L Main supplier: MDWASA - MAIN SYSTEM · 2,377,460 people · 2019
Highest in the city: 88.282 µg/L — AMERICANA VILLAGE · 2,500 people · 2019 | 6/6 | SYR4 |
| Nitrite | 38.1 µg/L 3.8% of the EPA limit 1000 µg/L Main supplier: MDWASA - MAIN SYSTEM · 2,377,460 people · 2019
Highest in the city: 78 µg/L — REDLAND MHC, LLC · 160 people · 2019 | 3/6 | SYR4 |
| Barium | 10.38 µg/L 0.5% of the EPA limit 2000 µg/L Main supplier: MDWASA - MAIN SYSTEM · 2,377,460 people · 2017
Highest in the city: 34.9 µg/L — JONES' TRAILER PARK · 100 people · 2018 | 6/6 | SYR4 |
| Copper | 2.575 µg/L 0.2% of the EPA limit 1300 µg/L Main supplier: MDWASA - MAIN SYSTEM · 2,377,460 people · 2017
Highest in the city: 29.55 µg/L — REDLAND MHC, LLC · 160 people · 2018 | 6/6 | SYR4 |
| Combined Uranium | 1.91018 µg/L 6.4% of the EPA limit 30 µg/L Main supplier: MDWASA - MAIN SYSTEM · 2,377,460 people · 2017
Highest in the city: 15.943 µg/L — MDWASA/REX UTILITIES · 45,200 people · 2017 | 3/6 | SYR4 |
| Gross Alpha, Excl. Radon And U | 7.8875 pCi/L 53% of the EPA limit 15 pCi/L Highest in the city: MDWASA/REX UTILITIES · 45,200 people · 2017 | 3/6 | SYR4 |
| Lead | 0.1000 µg/L 0.7% of the EPA limit 15 µg/L Main supplier: MDWASA - MAIN SYSTEM · 2,377,460 people · 2017
Highest in the city: 2.2 µg/L — REDLAND MHC, LLC · 160 people · 2018 | 4/6 | SYR4 |
| Chromium | 1.065 µg/L 1.1% of the EPA limit 100 µg/L Main supplier: MDWASA - MAIN SYSTEM · 2,377,460 people · 2017
Highest in the city: 2.1 µg/L — SILVER PALM MOBILE HOMES · 250 people · 2018 | 5/6 | SYR4 |
| Arsenic | 1.4 µg/L 14% of the EPA limit 10 µg/L Main supplier: MDWASA - MAIN SYSTEM · 2,377,460 people · 2017
Highest in the city: 1.99 µg/L — AMERICANA VILLAGE · 2,500 people · 2019 | 6/6 | SYR4 |
| Selenium | 0.7000 µg/L 1.4% of the EPA limit 50 µg/L Main supplier: MDWASA - MAIN SYSTEM · 2,377,460 people · 2017
Highest in the city: 1.6 µg/L — AMERICANA VILLAGE · 2,500 people · 2019 | 3/6 | SYR4 |
| Dalapon | 1.1 µg/L 0.6% of the EPA limit 200 µg/L Highest in the city: JONES' TRAILER PARK · 100 people · 2018 | 1/6 | SYR4 |
| Antimony, Total | 0.1000 µg/L 1.7% of the EPA limit 6 µg/L Main supplier: MDWASA - MAIN SYSTEM · 2,377,460 people · 2017
Highest in the city: 0.4850 µg/L — MDWASA/REX UTILITIES · 45,200 people · 2017 | 3/6 | SYR4 |
| P-Dichlorobenzene | 0.3600 µg/L 0.5% of the EPA limit 75 µg/L Highest in the city: MDWASA/REX UTILITIES · 45,200 people · 2019 | 1/6 | SYR4 |
| 6:2 Fts | 0.1900 µg/L No EPA limit set Main supplier: MDWASA - MAIN SYSTEM · 2,377,460 people · 2024 | 1/6 | UCMR-5 |
| Cadmium | 0.1000 µg/L 2% of the EPA limit 5 µg/L Highest in the city: MDWASA/REX UTILITIES · 45,200 people · 2017 | 1/6 | SYR4 |
| Pfhxa | 0.0580 µg/L No EPA limit set Main supplier: MDWASA - MAIN SYSTEM · 2,377,460 people · 2024 | 2/6 | UCMR-5 |
| Pfpea | 0.0560 µg/L No EPA limit set Main supplier: MDWASA - MAIN SYSTEM · 2,377,460 people · 2024 | 2/6 | UCMR-5 |
| PFOS | 0.0330 µg/L No EPA limit set Main supplier: MDWASA - MAIN SYSTEM · 2,377,460 people · 2024
Highest in the city: 0.0374 µg/L — MDWASA/REX UTILITIES · 45,200 people · 2025 | 2/6 | UCMR-5 |
| Pfba | 0.0220 µg/L No EPA limit set Main supplier: MDWASA - MAIN SYSTEM · 2,377,460 people · 2024 | 2/6 | UCMR-5 |
| Pfhpa | 0.0200 µg/L No EPA limit set Main supplier: MDWASA - MAIN SYSTEM · 2,377,460 people · 2024 | 2/6 | UCMR-5 |
| PFBS | 0.0046 µg/L No EPA limit set Main supplier: MDWASA - MAIN SYSTEM · 2,377,460 people · 2024
Highest in the city: 0.0170 µg/L — MDWASA/REX UTILITIES · 45,200 people · 2025 | 2/6 | UCMR-5 |
| PFOA | 0.0140 µg/L No EPA limit set Main supplier: MDWASA - MAIN SYSTEM · 2,377,460 people · 2024 | 2/6 | UCMR-5 |
| 8:2 Fts | 0.0096 µg/L No EPA limit set Main supplier: MDWASA - MAIN SYSTEM · 2,377,460 people · 2024 | 1/6 | UCMR-5 |
| PFHXS | 0.0094 µg/L No EPA limit set Main supplier: MDWASA - MAIN SYSTEM · 2,377,460 people · 2024 | 2/6 | UCMR-5 |
| PFNA | 0.0065 µg/L No EPA limit set Main supplier: MDWASA - MAIN SYSTEM · 2,377,460 people · 2024 | 1/6 | UCMR-5 |
| Lead | 0.0031 mg/L 21% of the EPA limit 0.0150 mg/L Main supplier: MDWASA - MAIN SYSTEM · 2,377,460 people · 2023 | 6/6 | 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 Miami
| Supplier | Population served |
|---|---|
| MDWASA - MAIN SYSTEM | 2,377,460 |
| MDWASA/REX UTILITIES | 45,200 |
| AMERICANA VILLAGE | 2,500 |
| SILVER PALM MOBILE HOMES | 250 |
| REDLAND MHC, LLC | 160 |
| JONES' TRAILER PARK | 100 |
Frequently asked questions about Miami tap water
Is Miami tap water safe to drink?
EPA testing detected 30 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?
6 public water suppliers report drinking-water monitoring for Miami, Florida 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 Nitrate, Fluoride, Cyanide, TTHM, 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.