Mine sometimes has a very slight sulfur odor when I first turn on the faucet in the morning. I recently had a guy from Public Works to flush the lines in my street,he said that the hot weather tends to do some strange things to the water...
you may want to check your hot water tank as well....The rods on the inside may need replaced.... We had this happen at a house in Florida....but depending on what type of Hot Water tank you have....