Duke Point Pollution Control Centre
The DPPCC uses Secondary Treatment to remove 95% of Biochemical Oxygen Demand and Total Suspended Solids. Sludge from DPPCC is trucked to the Greater Nanaimo Pollution Control Centre where it undergoes further treatment to become Biosolids.
Effluent is discharged into the Strait of Georgia 242 m off shore at a depth of 43 m.
- Biochemical Oxygen Demand (BOD) is a measure of the quantity of oxygen consumed by microorganisms to break down organic matter in water. A high BOD means that there will be less oxygen available to aquatic life.
- Total Suspended Solids (TSS) are solid pollutants that would be captured on fine filter paper. They are visible in water and decrease water clarity. High concentrations of TSS can cause problems for aquatic life.