Owasso is one of the fastest-growing cities in Oklahoma, creating rising demands for essential public infrastructure. To support this rapid growth, the City advanced one of its largest capital initiatives: a major expansion of the Owasso Wastewater Treatment Plant. The project increased treatment capacity and modernized plant systems, strengthening long-term performance and supporting the community’s continued development.
What challenges did STV address?
Owasso needed a high-capacity wastewater treatment facility that could accommodate significant population growth while also reducing operational costs and improving effluent quality. The existing systems required modernization, higher efficiency and more resilient processes that could operate reliably as flows continued to increase.
What solutions did STV deliver?
STV served as engineer-of-record for the first phase of the expansion, delivering upgrades to the main pump station, headworks facility, aeration basins, blowers, digesters and non-potable water systems. The design introduced advanced blower technology and shared anoxic zones, lowering energy use by more than 30 percent while improving treatment performance. A new aerobic digester reduced biosolids disposal needs and the non-potable water system cut potable water usage by 60 percent, strengthening the plant’s overall efficiency.
How does this project benefit the region?
The upgraded facility supports Owasso’s continued growth by providing cleaner, more sustainable wastewater treatment for the community and downstream environments. Reduced energy consumption lowers operating costs and decreases potable water use, supporting responsible resource management. Together, these improvements help Owasso deliver safer, cleaner water and greater long-term resilience.
Key stats and accolades
- More than 30% decrease in energy use
- 60% reduction in potable water use
- $250,000 estimated operations cost savings
- Grand Conceptor Award from the American Council of Engineering Companies in Oklahoma
