Office Assistant salary at Contra Costa Water District

The average office assistant salary at Contra Costa Water District was $101,896 , which is 82 percent higher than the average salary for this job in California, and 146 percent higher than the national average for this job . Office Assistant salaries at Contra Costa Water District typically range from $79,021 to $124,772 (25th to 75th percentile). The highest reported office assistant salary was $124,771. There are 2 employees at Contra Costa Water District with the job title office assistant.