Grounds/maintenance Assistant salary at Contra Costa Water District

The average grounds/maintenance assistant salary at Contra Costa Water District was $125,583 , which is 145 percent higher than the average salary for this job in California, and 140 percent higher than the national average for this job . Grounds/maintenance Assistant salaries at Contra Costa Water District typically range from $95,733 to $155,434 (25th to 75th percentile). The highest reported grounds/maintenance assistant salary was $178,285. There are 4 employees at Contra Costa Water District with the job title grounds/maintenance assistant.