Wastewater Treatment Supervisor salary at County of King

The average wastewater treatment supervisor salary at County of King was $138,663 . Wastewater Treatment Supervisor salaries at County of King typically range from $119,764 to $148,994 (25th to 75th percentile). The highest reported wastewater treatment supervisor salary was $214,167. There are 14 employees at County of King with the job title wastewater treatment supervisor.