Includes chemicals detected in your state for which annual utility averages exceeded an EWG-proposed health guideline established by a federal or state public health authority, toxicological assessment or peer-reviewed study.

1The water utility found all of its samples were below the Oregon Clean Water Authority 'low level results marked with an * were those from previous years.

2HAAS is a contaminant group that includes monobromoacetic acid, dibromoacetic acid, trichloroacetic acid, monochloroacetic acid and dibromoacetic acid. HAA9 is a contaminant group that includes the chemicals in HAA5 and bromochloroacetic acid, bromodichloroacetic acid, chlorodibromoacetic acid and tribromoacetic acid.

3TTHM is a contaminant group that includes bromodichloromethane, bromoform, dibromochloromethane and chloroform.