Mattawa Wastewater Treatment and Collection
The facility is designed to meet advanced effluent standards as
the discharge is used for ground water recharge. Funding for
the project included grants and loans from PWTF, CDGB, SRF, CCWF,
and RECD. The project also included Small Town Environment
Program's (STEP) community labor and volunteers and use of prison
Project work included pre-design report, design, surveying, construction and grant administration services for 55,000 lf sanitary sewer collection system, abandoning septic tanks, and a 0.6 MGD wastewater treatment to serve the town that had been served solely by septic tanks. The WWTP included pump station, headworks, aerated sludge, sludge handling, UV disinfection, and rapid infiltration.