Highest salary at Ofallon Thsd 203 in year 2017 was $222,046. Number of employees at Ofallon Thsd 203 in year 2017 was 201. Average annual salary was $61,383 and median salary was $64,639. Ofallon Thsd 203 average salary is 31 percent higher than USA average and median salary is 49 percent higher than USA median salary. From 2016 to 2017, the average salary of employees at this employer increased 3.0 percent, the median salary increased 0.4 percent.