Notice:

OWP continues to be short-staffed. Please place orders online rather than by phone to allow us to manage order volumes. We will do our best to process your orders and respond to your requests. We appreciate your patience and understanding. Starting July 1, 2022, OWP will only send paper test booklets and scantrons upon request and for a fee.

OWP will be closed from Friday, December 23, 2022, through Monday, January 2, 2023, for Winter Break.

Course certificates will be mailed on the following dates:

• Exams submitted before December 13th-before Winter Break
• Online exams and mail-in exams submitted after December 13th-early January

Water and Wastewater Terms Beginning Y

A B C D E F G H I J K L M N O P Q R S T U V W Y Z

Y (growth rate)
Y connection
yield