What was found in Oak 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 |
|---|---|---|---|
| Copper | 292.25 µg/L 22% of the EPA limit 1300 µg/L Main supplier: OAK ISLAND, TOWN OF · 26,924 people · 2017 | 1/1 | SYR4 |
| TTHM | 83.5 µg/L 104% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: OAK ISLAND, TOWN OF · 26,924 people · 2019 | 1/1 | SYR4 |
| Chloroform | 74.81 µg/L No EPA limit set Main supplier: OAK ISLAND, TOWN OF · 26,924 people · 2019 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 42.2 µg/L 70% of the EPA limit 60 µg/L Main supplier: OAK ISLAND, TOWN OF · 26,924 people · 2019 | 1/1 | SYR4 |
| Trichloroacetic Acid | 42.1 µg/L No EPA limit set Main supplier: OAK ISLAND, TOWN OF · 26,924 people · 2019 | 1/1 | SYR4 |
| Dichloroacetic Acid | 20 µg/L No EPA limit set Main supplier: OAK ISLAND, TOWN OF · 26,924 people · 2019 | 1/1 | SYR4 |
| Bromodichloromethane | 13.07 µg/L No EPA limit set Main supplier: OAK ISLAND, TOWN OF · 26,924 people · 2019 | 1/1 | SYR4 |
| Dibromochloromethane | 10.7855 µg/L No EPA limit set Main supplier: OAK ISLAND, TOWN OF · 26,924 people · 2019 | 1/1 | SYR4 |
| Lead | 6.01975 µg/L 40% of the EPA limit 15 µg/L Main supplier: OAK ISLAND, TOWN OF · 26,924 people · 2017 | 1/1 | SYR4 |
| Dibromoacetic Acid | 4.9 µg/L No EPA limit set Main supplier: OAK ISLAND, TOWN OF · 26,924 people · 2019 | 1/1 | SYR4 |
| Bromoform | 4.8847 µg/L No EPA limit set Main supplier: OAK ISLAND, TOWN OF · 26,924 people · 2019 | 1/1 | SYR4 |
| Monochloroacetic Acid | 4.2 µg/L No EPA limit set Main supplier: OAK ISLAND, TOWN OF · 26,924 people · 2019 | 1/1 | SYR4 |
| Monobromoacetic Acid | 3.15 µg/L No EPA limit set Main supplier: OAK ISLAND, TOWN OF · 26,924 people · 2019 | 1/1 | SYR4 |
| PFOS | 0.0120 µg/L No EPA limit set Main supplier: OAK ISLAND, TOWN OF · 26,924 people · 2025 | 1/1 | UCMR-5 |
| Pfpea | 0.0120 µg/L No EPA limit set Main supplier: OAK ISLAND, TOWN OF · 26,924 people · 2025 | 1/1 | UCMR-5 |
| Pfhxa | 0.0095 µg/L No EPA limit set Main supplier: OAK ISLAND, TOWN OF · 26,924 people · 2025 | 1/1 | UCMR-5 |
| PFOA | 0.0070 µg/L No EPA limit set Main supplier: OAK ISLAND, TOWN OF · 26,924 people · 2025 | 1/1 | UCMR-5 |
| Pfba | 0.0066 µg/L No EPA limit set Main supplier: OAK ISLAND, TOWN OF · 26,924 people · 2025 | 1/1 | UCMR-5 |
| PFBS | 0.0060 µg/L No EPA limit set Main supplier: OAK ISLAND, TOWN OF · 26,924 people · 2025 | 1/1 | UCMR-5 |
| Hfpo-Da | 0.0052 µg/L No EPA limit set Main supplier: OAK ISLAND, TOWN OF · 26,924 people · 2025 | 1/1 | UCMR-5 |
| PFHXS | 0.0051 µg/L No EPA limit set Main supplier: OAK ISLAND, TOWN OF · 26,924 people · 2025 | 1/1 | UCMR-5 |
| Pfhpa | 0.0041 µg/L No EPA limit set Main supplier: OAK ISLAND, TOWN OF · 26,924 people · 2025 | 1/1 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: OAK ISLAND, TOWN OF · 26,924 people · 2025 | 1/1 | LCR |
Water suppliers serving Oak Island
| Supplier | Population served |
|---|---|
| OAK ISLAND, TOWN OF | 26,924 |
Frequently asked questions about Oak Island tap water
Is Oak Island tap water safe to drink?
EPA testing detected 23 contaminants in the water serving Oak 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 Oak Island?
1 public water supplier report drinking-water monitoring for Oak Island, North Carolina to the EPA. Each is listed above with its population served.
What contaminants are in Oak Island's water?
The contaminants EPA monitoring detected in Oak Island include Copper, TTHM, Chloroform, Total Haloacetic Acids (HAA5), Trichloroacetic Acid. 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.