These grading lists determine the necessary certification level for treatment plant operators. Contact the Board of Wastewater Treatment Plants Certification Program in writing if there are any changes to your facility name, address or grading. Most recent update: January 2015.

Recommended Content

People also viewed...

You recently viewed...

Personalization is OFF. Your personal browsing history at Mass.gov is not visible because your personalization is turned off. To view your history, turn your personalization on.

Learn more on our .

*Recommendations are based on site visitor traffic patterns and are not endorsements of that content.