Administrative Assistant salary at Delta Diablo Sanitation District (Contra Costa)

The average administrative assistant salary at Delta Diablo Sanitation District (Contra Costa) was $109,753 , which is 17 percent higher than the average salary for this job in California, and 46 percent higher than the national average for this job . Administrative Assistant salaries at Delta Diablo Sanitation District (Contra Costa) typically range from $101,826 to $132,362 (25th to 75th percentile). The highest reported administrative assistant salary was $143,638. There are 5 employees at Delta Diablo Sanitation District (Contra Costa) with the job title administrative assistant.