Drinking water quality
What's in Durham, NC tap water
8 contaminants were measured in the Durham, NC water system's most recent annual report. Each is shown below against its federal limit.
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Chlorine | 0.3–2.5 mg/LRange | 4 mg/LMRDLG | Approaching the limit |
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| HAA5 | 11 ug/LRunning Annual Avg | 60 ug/LMCL | Within the limit |
| TTHM | 21 ug/LRunning Annual Avg | 80 ug/LMCL | Within the limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Fluoride | 0.11 mg/LReported Level | 4 mg/LMCLG | Within the limit |
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Copper | 0–0.392 mg/LRange | 1.3 mg/LMCLG | Within the limit |
| Lead | 0–5 ug/LRange | 0 ug/LMCLG | Detected — no federal limit |
| Sodium | 54.1 mg/LReported Level | None set | Detected — no federal limit |
VOCs & pesticides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Xylenes | 0.00079 mg/LReported Level | 10 mg/LMCLG | Within the limit |
Every figure here is transcribed verbatim from Durham, NC's annual Consumer Confidence Report, cross-checked by a second model, and approved by a person before publishing. Numbers are the utility's own — a water-quality report covers an entire service area, not a single address.