Quick Answer
Water in a sealed cistern should be tested regularly to ensure safety and quality. This includes testing for pH levels, total dissolved solids, and bacteria such as E. coli. Any issues found should be addressed promptly to maintain a safe drinking water supply.
Preventing Contamination
To prevent contamination in a buried concrete cistern, cover the cistern with a secure lid or cap that is designed to prevent animals from entering the cistern. The cistern should also be positioned to prevent surface water from collecting around it, ideally on a slight slope to ensure that water flows away from the cistern. A minimum depth of 8-10 feet below the surface is recommended to prevent surface water contamination.
Maintenance and Testing
Regular maintenance of the cistern includes inspecting the lid and seal for any signs of damage or wear, and ensuring that the cistern is not overfilled, which can lead to contamination. The cistern should be tested for water quality at least once a year, and the results should be compared to local and national drinking water standards. Testing should include pH levels, total dissolved solids, and bacteria such as E. coli, with any issues found addressed promptly.
Repairing Leaks and Cracks
Leaks and cracks in the cistern should be repaired promptly to prevent contamination. Cracks can be repaired using a mixture of concrete and epoxy, while leaks can be stopped by applying a sealant or patching the damaged area with concrete. It’s essential to follow local building codes and regulations when repairing a cistern, and to ensure that the repairs are done by a qualified professional to maintain the integrity of the cistern.
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