• Keep water butts clean by emptying and scrubbing out once a year.
• Keep water butts in a cool position as far as practically possible. Insulate them to help prevent temperatures increasing in warm weather or paint them with a light colour to reflect the light.
• If the temperature of the water for use in mist irrigation or sprinklers is between 20°C and 45°C or is full of debris/rust/algae do not use it.
Further Reading
Royal Horticultural Society – Minimising health risks in the garden
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