Michael Mobbs 5 June 2016 stormwater, rainwater, water, offgrid How to keep stormwater on your site - Part 1 Michael Mobbs 5 June 2016 stormwater, rainwater, water, offgrid Part 1 of how you can keep stormwater on your site. In this video I talk about the amount of wasted water and the pollution it causes. In Part 2 I will show you how as a householder you can keep all stormwater that falls on your property on site.