The average custodial salary at Slaton Isd was $21,583 , which is 18 percent lower than the average salary for this job in Texas, and 34 percent lower than the national average for this job . Custodial salaries at Slaton Isd typically range from $19,048 to $23,474 (25th to 75th percentile). The highest reported custodial salary was $28,545. There are 16 employees at Slaton Isd with the job title custodial.