Wastewater Treatment Plant Operator salary at Frederick County

The average wastewater treatment plant operator salary at Frederick County was $61,265 , which is 9 percent higher than the average salary for this job in Maryland, but 15 percent lower than the national average for this job . Wastewater Treatment Plant Operator salaries at Frederick County typically range from $25,672 to $96,542 (25th to 75th percentile). The highest reported wastewater treatment plant operator salary was $96,541. There are 3 employees at Frederick County with the job title wastewater treatment plant operator.