Echo Mountain customers may notice a smell of rotten eggs when they turn on the faucet. We have turned on the back up well. This unpleasant odor is from sulfur. As soon as we can we will shut the back up well off.
The information below was taken from the Oregon Health Authority Drinking Water website. This explains why water smells like sulfur and what causes the smell.
Many well owners notice the rotten egg smell only occasionally, or perhaps
seasonally. This occurs as a result of the amount of recharge water arriving
at the aquifer from the surface, or in the summer because the extent of
drawdown of the water table results in a deeper portion of the aquifer being
tapped. The actual cause and timing of the variation must be considered on
a case-by-case basis. Importantly, the sudden occurrence of the rotten egg
smell does not necessarily mean that your drinking water source has been
impacted by some pollution event. It probably represents natural variations
in water chemistry (See Natural Factors Influencing the Composition of
Groundwater at http://oregon.gov/DHS/ph/dwp/gwater.shtml).