Make Your Own Disinfectant

If disinfectants are not available, diluted household bleach solutions can be used if appropriate for the surface. Unexpired household bleach will be effective against coronaviruses when properly diluted.

Use bleach containing 5.25%–8.25% sodium hypochlorite. Do not use a bleach product if the percentage is not in this range or is not specified.
Follow the manufacturer’s application instructions for the surface, ensuring a contact time of at least 1 minute.
Ensure proper ventilation during and after application.
Check to ensure the product is not past its expiration date.
Never mix household bleach with ammonia or any other cleanser. This can cause fumes that may be very dangerous to breathe in.

Prepare a bleach solution by mixing:

5 tablespoons (1/3rd cup) of 5.25%–8.25% bleach per gallon of room temperature water OR
4 teaspoons of 5.25%–8.25% bleach per quart of room temperature water

Bleach solutions will be effective for disinfection up to 24 hours.

Alcohol solutions with at least 70% alcohol may also be used.