EWG Tap Water Database
Durham water quality
- Source
- Lake Michie / Little River
- Hardness
- 6–9 GPG
- Disinfected with
- chlorine
What's in Durham tap water
| Contaminant | Detected | Health guideline | Legal limit | Over guideline |
|---|---|---|---|---|
| Haloacetic Acids (HAA9) Disinfection ByproductHighest DBP levels in the Triangle; linked to cancer and reproductive harm. | 32.4 ppb | 0.06 ppb | No legal limit | 540× |
| Total Trihalomethanes Disinfection ByproductForm when chlorine treats Lake Michie water; linked to bladder cancer. | 37.1 ppb | 0.15 ppb | 80 ppb | 247× |
| Trichloroacetic Acid Disinfection ByproductHAA disinfection byproduct linked to liver cancer risk. | 13.3 ppb | 0.1 ppb | No legal limit | 133× |
| PFOA (Forever Chemical) PFASLinked to kidney cancer, endocrine disruption, and developmental harm; does not break down. | 2.09 ppt | 0.09 ppt | 4 ppt (proposed) | 23× |
| PFOS (Forever Chemical) PFASPersistent forever chemical linked to thyroid disruption, immune damage, and cancer. | 5.33 ppt | 0.3 ppt | 4 ppt (proposed) | 18× |
Figures from the EWG Tap Water Database.
Honest Water in Durham
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Durham water questions
- Is Durham water hard?
- Durham water runs about 6–9 GPG. That is hard enough to leave scale on fixtures, spot glassware, and shorten the life of water heaters and dishwashers.
- What is Durham water treated with?
- Durham's supply comes from Lake Michie / Little River and is disinfected with chlorine. Free chlorine is comparatively easy to remove with quality carbon filtration.
- Where do these Durham water figures come from?
- The EWG Tap Water Database, which compiles the utility's own state-reported testing results.
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