When is it time to get my tank cleaned? Rainwater tanks should be cleaned at least every 1-2 years because leaves, dirt, insects, and other materials can build up into sludge at the base of the tank. Waste from birds, possums, and rodents also have the potential to contaminate your water.

Using a mixture of 1 part bleach to 4 parts hot water wash the sides of the tank with the mop (or pressure washer) in order to remove the slime and dirt build up on the sides and corners of the tank. Scrub the build-up on the bottom and use the wet/dry vacuum to remove the rinse water from the tank.

The temperature of the tank from the inlet and outlet should be inspected at least annually. An internal inspection for signs of possible contamination and debris should be carried out every 6 months for potable water and every 12 months for non-potable water.

Boil water, if you do not have bottled water. Boiling is sufficient to kill pathogenic bacteria, viruses and protozoa (WHO, 2015). If water is cloudy, let it settle and filter it through a clean cloth, paperboiling water towel, or coffee filter. Bring water to a rolling boil for at least one minute.