Examinations: On-site wastewater treatment

Exam schedule

Examinations are administered each April and October. The following are application deadlines and exam dates for the on-site wastewater treatment system designer licensing exam:

Can I reschedule or withdraw from an exam without paying additional fees?

You may withdraw from a scheduled exam without forfeiting the fee by sending us a written notice no later than 6 weeks before the exam date. The fee submitted with your application will be held until you are scheduled in another exam.

However, if you do not pass an exam, or do not take it for any reason, you must pay a re-examination fee before you can be scheduled to take it again.

Study guides

On-Site Wastewater Treatment System Designer Examination Matrix (updated August 2007)

Will I get my test results?

Because the exam is pass/fail, you will not receive your exam scores if you pass the test. If you fail the test, we will tell you how many answers you got correct in each content area but will not tell you which specific answers were incorrect. Scores are usually available 6-8 weeks after the exam.