Sewage Treatment Plant Op salary at Massachusetts State Police

The average sewage treatment plant op salary at Massachusetts State Police was $88,426 , which is 4 percent higher than the average salary for this job in Massachusetts, and 4 percent higher than the national average for this job . Sewage Treatment Plant Op salaries at Massachusetts State Police typically range from $84,669 to $92,182 (25th to 75th percentile). The highest reported sewage treatment plant op salary was $92,182. There are 3 employees at Massachusetts State Police with the job title sewage treatment plant op.