Need to know criteria
Colorado uses the 2019 edition of standard, sequential examinations developed by the Association of Boards of Certification (ABC) for all classes of certificates, except Classes "S" and "T" which are custom exams.
- ABC's website provides Need to Know Criteria for exams.
- Applicants preparing to take the custom Colorado Small Water System exam should review ABC's Class I Water Treatment Operator Need to Know Criteria and the Class I Water Distribution Operator Need to Know Criteria.
- Applicants preparing to take the custom Colorado Small Wastewater System exam should review ABC's Class I Wastewater Treatment Operator Need to Know Criteria and the Class I Wastewater Collection Operator Need to Know Criteria.
- Applicants preparing the take the custom Colorado Class "T" exam should review ABC's Very Small Water System Operator Need to Know Criteria.
Examination Study Resources
- American Water Works Association (AWWA): Principles and Practices of Water Supply Operations Series.
- California Sacramento State University, Office of Water Programs: Operator Training Courses.
- Montana Water Center: Operator Basics Training Series (free download).
- Water Environment Federation (WEF): Select study guides from left panel of web page.
- National Environmental Training Center for Small Communities.
- New Mexico wastewater study manual (free download).
- Kentucky wastewater treatment manual (free download).