Wastewater Treatment Plant Supervisor salary at Asotin County Public Utility District of No. 1

The average wastewater treatment plant supervisor salary at Asotin County Public Utility District of No. 1 was $86,385 , which is 1 percent lower than the average salary for this job in Washington, but 4 percent higher than the national average for this job . Wastewater Treatment Plant Supervisor salaries at Asotin County Public Utility District of No. 1 typically range from $80,535 to $92,234 (25th to 75th percentile). The highest reported wastewater treatment plant supervisor salary was $92,234. There are 2 employees at Asotin County Public Utility District of No. 1 with the job title wastewater treatment plant supervisor.