It is important to note that this odor is normally not a health concern, but one of aesthetic quality.
The most likely cause of a sulfurous or rotten-egg like odor is from either the water trap below the sink (i.e. the 'P-trap') or from within the faucet itself. As organic material settles in the water trap beneath the sink a sulfurous, or rotten egg smell is often mistakenly perceived as coming from the water.
The best way to test this theory is by filling a glass of water at the sink and then smelling it in a different room away from the sink. If the smell disappears, then the problem is most likely in the sink itself. Pouring a ¼ cup of bleach down the drain and allowing it to sit overnight should help relieve the problem. Cleaning the aerator is also recommended.
Simple steps you can take at home to prevent water pollution.
Signage installed at Griggs, O'Shaughnessy & Hoover Reservoirs invites park visitors to take a self-guided tour along the shoreline & learn about the green infrastructure installed there.
Rain gardens, porous pavement & more can improve the quality of storm water entering the reservoirs that supply our drinking water.
Protect our Waterways Illustration Courtesy of NCDENR