The permit process for potable rainwater catchment systems

The Gulf Islands are in an excellent position for rainwater catchment. Though it fluctuates year-by-year and is slightly different from island to island, we can count on receiving nearly 800-1000mm of precipitation a year. This is enough rainfall that most households can catch enough water for their yearly needs. This can relieve a bad quality or poor pumping well. Or, it can open the door for building a house on a site where previously that wasn’t an option, due to a lack of groundwater for a well. So what does the permit process look like?