On Line Environmental, Inc.

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If you would like to register and receive a username and password, contact Jim at the email address at bottom right of the page.

Recently Published: Revised Basic Biological Wastewater Practice Exams - go to the catalog: Biological Wastewater Practice Exams. Two updated practice exams have been published: a 30-question and a 100-question exam. Both exams use a bank of around 600 questions and many of the questions now have explanations which serve as "mini lessons". Use Build 25-02 to access the latest exams.

Recently Published: Revised Basic Physical/Chemical Wastewater Practice Exam - go to the catalog: Physical/Chemical Wastewater Practice Exams. Use Build 25.03 for the latest version.

Recently Published: Advanced Water Distribution Practice Exam - this exam simulates a level 3 or 4 (level B or A) exam, has 30 questions. This is the first build of this exam - more to come and with explanations to the questions.

If you wish to take any of the courses for continuing education, please access them in the catalog labelled "Continuing Education".  The courses there are configured for CE and successful completion of them will place a certificate in your account.