Home Study Correspondence Courses
For Water Operator Certification


*All new students must take a DOH approved Laboratory course before taking the course final exam.
Plant Type
Required Minimum Operator Grade
Required Minimum Assistant Operator Grade
Water treatment plant with facilities for filtration* which treats 2.5 MGD# or less
IIA
IIA
Water treatment plant without facilities for filtration* which treats 2.5 MGD# or less and serves more than 1,000 people
IIB
C
Water treatment plant that serves 1,000 people or less
C
None Required
Distribution system serving 1,000 people or more
D
None Required

Note: * filtration means a treatment process which includes slow sand filtration, gravity rapid sand, anthracite coal filtration, pressure filtration, diatomaceous earth filtration, or other processes determined to acceptable treatment under Subpart 5-1.

# MGD = million gallons per day.