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 $152,639 , which is 62 percent higher than the average salary for this job in California, and 103 percent higher than the national average for this job . Administrative Assistant salaries at Central Contra Costa Sanitary District (Contra Costa) typically range from $148,269 to $158,768 (25th to 75th percentile). The highest reported administrative assistant salary was $164,379. There are 10 employees at Central Contra Costa Sanitary District (Contra Costa) with the job title administrative assistant.