What was found in Marco Island'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 | 645 µg/L 16% of the EPA limit 4000 µg/L Main supplier: MARCO ISLAND UTILITIES (CITY OF) · 31,830 people · 2019 | 1/2 | SYR4 |
| Nitrate | 223 µg/L 2.2% of the EPA limit 10000 µg/L Main supplier: MARCO ISLAND UTILITIES (CITY OF) · 31,830 people · 2019 | 1/2 | SYR4 |
| Nitrite | 84 µg/L 8.4% of the EPA limit 1000 µg/L Main supplier: MARCO ISLAND UTILITIES (CITY OF) · 31,830 people · 2019 | 1/2 | SYR4 |
| TTHM | 69.125 µg/L 86% of the EPA limit 80 µg/L Main supplier: MARCO ISLAND UTILITIES (CITY OF) · 31,830 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 33.62 µg/L 56% of the EPA limit 60 µg/L Main supplier: MARCO ISLAND UTILITIES (CITY OF) · 31,830 people · 2019 | 2/2 | SYR4 |
| Cyanide | 16.4 µg/L 8.2% of the EPA limit 200 µg/L Main supplier: MARCO ISLAND UTILITIES (CITY OF) · 31,830 people · 2019 | 1/2 | SYR4 |
| Barium | 10.955 µg/L 0.5% of the EPA limit 2000 µg/L Main supplier: MARCO ISLAND UTILITIES (CITY OF) · 31,830 people · 2019 | 1/2 | SYR4 |
| Selenium | 5.335 µg/L 11% of the EPA limit 50 µg/L Main supplier: MARCO ISLAND UTILITIES (CITY OF) · 31,830 people · 2019 | 1/2 | SYR4 |
| Arsenic | 2.195 µg/L 22% of the EPA limit 10 µg/L Main supplier: MARCO ISLAND UTILITIES (CITY OF) · 31,830 people · 2019 | 1/2 | SYR4 |
| Gross Alpha, Excl. Radon And U | 1.4 pCi/L 9.3% of the EPA limit 15 pCi/L Main supplier: MARCO ISLAND UTILITIES (CITY OF) · 31,830 people · 2017 | 1/2 | SYR4 |
| Copper | 1.385 µg/L 0.1% of the EPA limit 1300 µg/L Main supplier: MARCO ISLAND UTILITIES (CITY OF) · 31,830 people · 2017 | 1/2 | SYR4 |
| Lead | 1.3 µg/L 8.7% of the EPA limit 15 µg/L Main supplier: MARCO ISLAND UTILITIES (CITY OF) · 31,830 people · 2019 | 1/2 | SYR4 |
| Antimony, Total | 0.8000 µg/L 13% of the EPA limit 6 µg/L Main supplier: MARCO ISLAND UTILITIES (CITY OF) · 31,830 people · 2019 | 1/2 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 0.5700 µg/L 9.5% of the EPA limit 6 µg/L Main supplier: MARCO ISLAND UTILITIES (CITY OF) · 31,830 people · 2017 | 1/2 | SYR4 |
| Chromium | 0.5000 µg/L 0.5% of the EPA limit 100 µg/L Main supplier: MARCO ISLAND UTILITIES (CITY OF) · 31,830 people · 2019 | 1/2 | SYR4 |
| Combined Uranium | 0.2429 µg/L 0.8% of the EPA limit 30 µg/L Main supplier: MARCO ISLAND UTILITIES (CITY OF) · 31,830 people · 2019 | 1/2 | SYR4 |
| Pfba | 0.0092 µg/L No EPA limit set Main supplier: MARCO ISLAND UTILITIES (CITY OF) · 31,830 people · 2024 | 1/2 | UCMR-5 |
| Pfpea | 0.0086 µg/L No EPA limit set Main supplier: MARCO ISLAND UTILITIES (CITY OF) · 31,830 people · 2024 | 2/2 | UCMR-5 |
| PFOS | 0.0080 µg/L No EPA limit set Main supplier: MARCO ISLAND UTILITIES (CITY OF) · 31,830 people · 2024 | 1/2 | UCMR-5 |
| PFOA | 0.0066 µg/L No EPA limit set Main supplier: MARCO ISLAND UTILITIES (CITY OF) · 31,830 people · 2024 | 1/2 | UCMR-5 |
| Pfhxa | 0.0062 µg/L No EPA limit set Main supplier: MARCO ISLAND UTILITIES (CITY OF) · 31,830 people · 2024 | 2/2 | UCMR-5 |
| Lead | 0.0029 mg/L 19% of the EPA limit 0.0150 mg/L Main supplier: MARCO ISLAND UTILITIES (CITY OF) · 31,830 people · 2023
Highest in the city: 0.0047 mg/L — GOODLAND WATER COMPANY · 853 people · 2024 | 2/2 | LCR |
| PFBS | 0.0047 µg/L No EPA limit set Main supplier: MARCO ISLAND UTILITIES (CITY OF) · 31,830 people · 2024 | 1/2 | UCMR-5 |
| Pfhpa | 0.0032 µg/L No EPA limit set Main supplier: MARCO ISLAND UTILITIES (CITY OF) · 31,830 people · 2024 | 1/2 | UCMR-5 |
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 Marco Island
| Supplier | Population served |
|---|---|
| MARCO ISLAND UTILITIES (CITY OF) | 31,830 |
| GOODLAND WATER COMPANY | 853 |
Frequently asked questions about Marco Island tap water
Is Marco Island tap water safe to drink?
EPA testing detected 24 contaminants in the water serving Marco Island. 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 Marco Island?
2 public water suppliers report drinking-water monitoring for Marco Island, Florida to the EPA. Each is listed above with its population served.
What contaminants are in Marco Island's water?
The contaminants EPA monitoring detected in Marco Island include Fluoride, Nitrate, Nitrite, 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.