Wastewater Treatment

Water Reclamation

Wet Weather/Sewer Infrastructure

Odor Control

Relevant Projects


Greeley and Hansen earned its status in the wastewater engineering industry by the firm's successful track-record with hundreds of treatment plant projects across the United States. We have completed planning, design and construction services projects for all types of treatment facilities ranging from extended aeration systems to advanced treatment works utilizing the latest process technologies. Historically, the firm has experience with plants with treatment capacities ranging from 0.4 mgd to 1,200 mgd. Our current staff of 300 employees offers specialized experience gained from more than 35 different wastewater treatment plants over the past 15 years. This experience also includes large and small plants and a variety of treatment processes and technologies.