Your water is tested on a regular schedule.  Until recently, the results of the regular bacterial monitoring have been good enough for the state of Oregon to allow the district to provide your water without chlorine treatment.  Occassionally, however, leaks or repairs have made it necessary for our superintendent to treat parts of the distribution system with chlorine bleach to remove any risk of contamination.  If that occurs, you may temporarily notice a chlorine smell or taste that will fade away as fresh water flushes the bleach out of the system.