Arizona Water Treatment: Grade 2 Conventional Treatment & Disinfection Operations
Grade 2 is where an Arizona water treatment operator moves beyond basic groundwater wells (Grade 1) into full responsibility for conventional surface-water treatment trains and more complex disinfection and corrosion-control decisions. Arizona's Grade 2-4 exam data shows this level is dominated by disinfection, corrosion control, physical/chemical analysis, filtration, and coagulation/flocculation — the core conventional process train used by CAP/Colorado River and Salt-Verde surface plants serving the Phoenix and Tucson metro areas.
Coagulation, Flocculation & Sedimentation
CAP-fed plants typically use alum or ferric-based coagulants to destabilize colloidal turbidity from canal-delivered Colorado River water. Jar testing determines optimum coagulant dose and pH; under-dosing leaves residual turbidi