Grounds/maintenance Assistant salary at Contra Costa Water District

The average grounds/maintenance assistant salary at Contra Costa Water District was $133,206 , which is 192 percent higher than the average salary for this job in California, and 194 percent higher than the national average for this job . Grounds/maintenance Assistant salaries at Contra Costa Water District typically range from $126,490 to $139,923 (25th to 75th percentile). The highest reported grounds/maintenance assistant salary was $139,923. There are 2 employees at Contra Costa Water District with the job title grounds/maintenance assistant.