Abstract
Storm water is ideally harvested to aquifers after passing it through aggregate filter media and also as a new concept of water sensitive urban design (WSUD). Water needs to be free of pollutants before harvesting. Infiltration systems are one of the many ways of harvesting. They use aggregate filter media to remove pollutants. Filter medias are available in different configurations, shapes and sizes. There is a need to identify the filter media which is most resistant to readjustment and repacking. Standard ASTM D2434-68 test was carried out on four filter medias to compare the relative performance of each. Coarse sand was found to be most effective in bearing the impact of water and more resistant to breakage. Further research needs to done to find a solution to automate the replacement of filter media once clogging is reported.
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