What was found in Erwin'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 | 1100 µg/L 11% of the EPA limit 10000 µg/L Main supplier: DUNN, CITY OF · 12,442 people · 2019 | 1/1 | SYR4 |
| Nitrate-Nitrite | 1100 µg/L 11% of the EPA limit 10000 µg/L Main supplier: DUNN, CITY OF · 12,442 people · 2019 | 1/1 | SYR4 |
| Fluoride | 722 µg/L 18% of the EPA limit 4000 µg/L Main supplier: DUNN, CITY OF · 12,442 people · 2019 | 1/1 | SYR4 |
| Copper | 187.2 µg/L 14% of the EPA limit 1300 µg/L Main supplier: DUNN, CITY OF · 12,442 people · 2019 | 1/1 | SYR4 |
| Cyanide | 177.5 µg/L 89% of the EPA limit 200 µg/L Main supplier: DUNN, CITY OF · 12,442 people · 2019 | 1/1 | SYR4 |
| TTHM | 81.9 µg/L 102% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: DUNN, CITY OF · 12,442 people · 2019 | 1/1 | SYR4 |
| Chloroform | 35.15 µg/L No EPA limit set Main supplier: DUNN, CITY OF · 12,442 people · 2019 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 31.7 µg/L 53% of the EPA limit 60 µg/L Main supplier: DUNN, CITY OF · 12,442 people · 2019 | 1/1 | SYR4 |
| Dibromochloromethane | 30.15 µg/L No EPA limit set Main supplier: DUNN, CITY OF · 12,442 people · 2019 | 1/1 | SYR4 |
| Bromodichloromethane | 27.1 µg/L No EPA limit set Main supplier: DUNN, CITY OF · 12,442 people · 2019 | 1/1 | SYR4 |
| Dichloroacetic Acid | 23 µg/L No EPA limit set Main supplier: DUNN, CITY OF · 12,442 people · 2019 | 1/1 | SYR4 |
| Bromoform | 22 µg/L No EPA limit set Main supplier: DUNN, CITY OF · 12,442 people · 2019 | 1/1 | SYR4 |
| Trichloroacetic Acid | 9.18 µg/L No EPA limit set Main supplier: DUNN, CITY OF · 12,442 people · 2019 | 1/1 | SYR4 |
| Dibromoacetic Acid | 8.49 µg/L No EPA limit set Main supplier: DUNN, CITY OF · 12,442 people · 2019 | 1/1 | SYR4 |
| Gross Beta Particle Activity | 6.015 pCi/L No EPA limit set Main supplier: DUNN, CITY OF · 12,442 people · 2018 | 1/1 | SYR4 |
| Lead | 5.568 µg/L 37% of the EPA limit 15 µg/L Main supplier: DUNN, CITY OF · 12,442 people · 2019 | 1/1 | SYR4 |
| Monochloroacetic Acid | 2.575 µg/L No EPA limit set Main supplier: DUNN, CITY OF · 12,442 people · 2019 | 1/1 | SYR4 |
| Monobromoacetic Acid | 1.47 µg/L No EPA limit set Main supplier: DUNN, CITY OF · 12,442 people · 2019 | 1/1 | SYR4 |
| Atrazine | 0.4120 µg/L 14% of the EPA limit 3 µg/L Main supplier: DUNN, CITY OF · 12,442 people · 2019 | 1/1 | SYR4 |
| Simazine | 0.2725 µg/L 6.8% of the EPA limit 4 µg/L Main supplier: DUNN, CITY OF · 12,442 people · 2019 | 1/1 | SYR4 |
| Pfpea | 0.0224 µg/L No EPA limit set Main supplier: DUNN, CITY OF · 12,442 people · 2024 | 1/1 | UCMR-5 |
| Pfhxa | 0.0204 µg/L No EPA limit set Main supplier: DUNN, CITY OF · 12,442 people · 2024 | 1/1 | UCMR-5 |
| PFOS | 0.0144 µg/L No EPA limit set Main supplier: DUNN, CITY OF · 12,442 people · 2024 | 1/1 | UCMR-5 |
| PFBS | 0.0142 µg/L No EPA limit set Main supplier: DUNN, CITY OF · 12,442 people · 2024 | 1/1 | UCMR-5 |
| Pfba | 0.0134 µg/L No EPA limit set Main supplier: DUNN, CITY OF · 12,442 people · 2024 | 1/1 | UCMR-5 |
| PFOA | 0.0120 µg/L No EPA limit set Main supplier: DUNN, CITY OF · 12,442 people · 2024 | 1/1 | UCMR-5 |
| Pfhpa | 0.0076 µg/L No EPA limit set Main supplier: DUNN, CITY OF · 12,442 people · 2024 | 1/1 | UCMR-5 |
| PFHXS | 0.0052 µg/L No EPA limit set Main supplier: DUNN, CITY OF · 12,442 people · 2024 | 1/1 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: DUNN, CITY OF · 12,442 people · 2025 | 1/1 | 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 Erwin
| Supplier | Population served |
|---|---|
| DUNN, CITY OF | 12,442 |
Frequently asked questions about Erwin tap water
Is Erwin tap water safe to drink?
EPA testing detected 29 contaminants in the water serving Erwin. 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 Erwin?
1 public water supplier report drinking-water monitoring for Erwin, North Carolina to the EPA. Each is listed above with its population served.
What contaminants are in Erwin's water?
The contaminants EPA monitoring detected in Erwin include Nitrate, Nitrate-Nitrite, Fluoride, Copper, Cyanide. 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.