The average custodian salary at Afton Es was $21,365 , which is 19 percent lower than the average salary for this job in Oklahoma, and 70 percent lower than the national average for this job . Custodian salaries at Afton Es typically range from $16,954 to $25,834 (25th to 75th percentile). The highest reported custodian salary was $25,834. There are 5 employees at Afton Es with the job title custodian.