Why does my water smell like rotten eggs and how do I get rid of it?

Smelly water, or rotten egg odor, is hydrogen sulfide gas that is present in the water. It is not usually harmful at the low concentration that occurs in a household water system. The City maintains a chlorine residual throughout the system that eliminates this smell, but if water sits in any place too long (dead-end lines, unoccupied houses, new developments with only a few homes), the chlorine dissipates and results in the smell. Water heaters with a magnesium anode rode are another common cause of this odor, especially in houses where little water is used. To eliminate smelly water caused by your water heater, turn your hot water heater to high for several hours (150-160 degrees). This should kill the sulfur bacteria. Then flush your system, especially your water heater. Also, the magnesium rod can be replaced with an aluminum one or removed completely. If you live on a dead-end line or in an area with just a few homes, we recommend calling the City Water Department so that the lines can be flushed to assure that there is chlorine present to kill the hydrogen sulfide odor. 

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1. What is my drinking water quality?
2. Why is my water rusty?
3. Why do I notice a chlorine odor in the water?
4. Why is there a metallic taste in my water?
5. Why does the water sometimes look milky?
6. What causes the spots on my dishes?
7. I have a water softener in my home. How much water hardness does my water softener need to be set at?
8. Why does my water smell like rotten eggs and how do I get rid of it?
9. Faucet Deposits
10. Why is my water green?
11. Is City water safe to drink?
12. Who else can I discuss water concerns with?
13. Sample Site
14. Why are there dark specs/staining in my water?
15. How do I turn off the water supply to my house in the event of a scheduled plumbing repair?
16. What is the small metal disk in my yard or driveway?
17. Is the City responsible for plumbing leaks?
18. Does my insurance company cover my service line repairs/replacements?
19. How do I report a water or sewer issue?
20. I've noticed the water pressure in my house has decreased over the years, why?
21. How do I flush my plumbing?