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

The average administrative services assistant salary at Central Contra Costa Sanitary District (Contra Costa) was $159,991 , which is 63 percent higher than the average salary for this job in California, and 184 percent higher than the national average for this job . Administrative Services Assistant salaries at Central Contra Costa Sanitary District (Contra Costa) typically range from $150,554 to $163,610 (25th to 75th percentile). The highest reported administrative services assistant salary was $187,762. There are 5 employees at Central Contra Costa Sanitary District (Contra Costa) with the job title administrative services assistant.