Administrative Assistant salary at Central Contra Costa Sanitary District (Contra Costa)

The average administrative assistant salary at Central Contra Costa Sanitary District (Contra Costa) was $158,065 , which is 60 percent higher than the average salary for this job in California, and 110 percent higher than the national average for this job . Administrative Assistant salaries at Central Contra Costa Sanitary District (Contra Costa) typically range from $154,722 to $166,642 (25th to 75th percentile). The highest reported administrative assistant salary was $169,052. There are 9 employees at Central Contra Costa Sanitary District (Contra Costa) with the job title administrative assistant.