EWG Tap Water Database

Chapel Hill water quality

Source
University Lake / Cane Creek
Hardness
6–9 GPG
Disinfected with
chlorine

What's in Chapel Hill tap water

Contaminants detected in Chapel Hill tap water
ContaminantDetectedHealth guidelineLegal limitOver guideline
Total Trihalomethanes Disinfection ByproductLinked to bladder cancer and reproductive harm.44.6 ppb0.15 ppb80 ppb297×
Haloacetic Acids (HAA5) Disinfection ByproductFive chlorination byproducts linked to cancer and developmental harm.18.3 ppb0.1 ppb60 ppb183×
Dichloroacetic Acid Disinfection ByproductHAA byproduct linked to liver tumors and developmental harm.11.2 ppb0.4 ppbNo legal limit28×
Combined Radium RadiologicalRadioactive element that concentrates in bones; linked to bone cancer with prolonged exposure.1.24 pCi/L0.05 pCi/L5 pCi/L25×
Nitrate AgriculturalAgricultural runoff contaminant linked to blue baby syndrome in infants and adult cancer risk.2.80 ppm0.14 ppm10 ppm20×

Figures from the EWG Tap Water Database.

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Chapel Hill water questions

Is Chapel Hill water hard?
Chapel Hill 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 Chapel Hill water treated with?
Chapel Hill's supply comes from University Lake / Cane Creek and is disinfected with chlorine. Free chlorine is comparatively easy to remove with quality carbon filtration.
Where do these Chapel Hill water figures come from?
The EWG Tap Water Database, which compiles the utility's own state-reported testing results.

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