Water Treatment Plant Operator salary at Frederick County

The average water treatment plant operator salary at Frederick County was $82,907 , which is 26 percent higher than the average salary for this job in Maryland, and 36 percent higher than the national average for this job . Water Treatment Plant Operator salaries at Frederick County typically range from $73,907 to $80,718 (25th to 75th percentile). The highest reported water treatment plant operator salary was $128,026. There are 7 employees at Frederick County with the job title water treatment plant operator.