DRINKING WATER TREATMENT PROCESS — CLICK ANY STEP TO EXPLORE
💧
STEP 1Bar Screens & Fine Screens
Intake & Screening
👆
Interactive Diagram
Click the labelled buttons on the diagram to learn about each component
💧 WATER QUALITY AT THIS STAGE
Turbidity
5–500 NTU
pH
6.5–8.5
Colour
Yellow/Brown
Contaminants
Sediment, bacteria, algae
WHAT HAPPENS HERE
Raw water is drawn from a surface water source (river, lake, or reservoir) or groundwater (well). Screens remove large debris — leaves, fish, sticks — before water enters the treatment train.
⚡ KEY EXAM POINTS
1
Bar screens remove objects >10mm
2
Fine screens (0.5–6mm) remove smaller debris
3
Intake positioned to minimise algae and contamination
4
Flow monitoring begins at this point
📋 ONTARIO REGULATION
O. Reg. 170/03 requires continuous monitoring of raw water turbidity, pH, and temperature at the intake point.