What amount of sodium hypochlorite (bleach) is needed to change the chlorine level in 10,000 gallons of water by 1 ppm?

To determine how much sodium hypochlorite is required to raise the chlorine level in a pool by 1 ppm (parts per million) for a volume of 10,000 gallons of water, it’s important to understand the concentration of sodium hypochlorite being used.

Sodium hypochlorite is commonly sold as a household bleach, which typically has a concentration of around 5.25% to 6%. When this concentration is used, it’s generally accepted that approximately 1.5 ounces of bleach per 10,000 gallons will yield a chlorine increase of about 1 ppm.

Considering this, if you want to increase the chlorine level in a 10,000-gallon pool by 1 ppm, you would need roughly 13 fl oz of sodium hypochlorite, factoring in dilution and other variables like water temperature and organic load in the pool. This amount aligns with established guidelines for calculating chlorine addition.

In sum, 13 fl oz is the correct quantity to effectively achieve a 1 ppm increase in chlorine level in 10,000 gallons of water, taking into account typical concentrations and practical application for pool sanitation.