The Wastewater Division operates within the Public Works Department and is responsible for managing all facets of wastewater treatment for the City of Pasco to meet and exceed State and Federal requirements for the safe return of water to the Columbia River.
Free tours are available of the City’s WWTP. The tour is approximately two hours in length and includes a walk-through of the plant and an explanation of plant processes. Advance reservations are required. Call 509-544-3083 for more information.
Responsibilities include:
- Removing foreign materials in the wastewater.
- Primary treatment-settable solids are removed from the wastewater at the primary clarifiers.
- Secondary treatment includes biologically converting ammonia contained in the plant influent to nitrate.
- After secondary treatment the wastewater is disinfected with ultraviolet light prior to returning to the Columbia River.
- Solids are thickened in the primary clarifiers, transferred to the two primary and two secondary digesters.
- Digested bio-solids are dewatered on drying beds and applied to agricultural land as a soil amendment.
This division consists of 10 staff members.
For odor concerns or for more information on the WWTP, please call 509-544-3083.
