How much chlore powder mixture per gallon of water?

For water disinfection, a common recommendation is to use 1/4 teaspoon of chlorine powder (calcium hypochlorite) per gallon of water, which typically yields about 2-4 mg/L of chlorine. If you're using a different concentration of chlorine powder, check the manufacturer's instructions for the appropriate dosage. Always allow the mixture to sit for at least 30 minutes before use, ensuring it reaches the proper disinfection levels.