Water Quality

The Delaware River in the Philadelphia area is designated as Zone 3 by the Delaware River
Basin Commission (DRBC). Imaging a wastewater treatment plant discharges 3 MGD
(million gallons per day) of effluent containing 25 mg/L BOD and 2 mg/L DO to the upper
stream of the Delaware River Zone 3. Is it still within the Philadelphia area when the river
reaches the Streeter Phelps critical point?
Deoxygenation rate constant = 0.2 d-1
.
Use todays temperature to determine the saturated DO.
Find the rest of the data of the Delaware River Zone 3 online.