This sheet consolidates the 33 formulas most likely to appear on Ontario OWWCO water and wastewater operator exams — CT values, chemical dosing, sludge volume index, pump power, detention time, filter loading rate, and more — each with a worked example showing correct unit handling.
Every Class 1–4 water and wastewater course has its own targeted formula sheet inside the platform. Pick the one that matches your exam class for the tightest scope.
Try the calculation-only practice mode to drill the formulas you just reviewed.