Whether your rainwater harvesting system is for non-potable or potable use, there are key factors thatdictate the quality of that collected water and the success ofyour system.Collection surfaces shouldbe compatible with intended usage. Whilean asphalt shingle roofmaylend itself for collectionof a non-potable demand, abaked enamel, metal roof would be preferred for potable use.
Rainwater thathas beencollectedin a manner that reducesdebris and contamination will store betterthan that whichhas not. Bacterial growth can be kept to a minimum by prescreening and aerating rainwater entering storage. Diffusing, or calming water entering storage will reduce disturbance ofany sediment, allowing microorganismsto do their job by eating bacteria. All inlets and outlets of cistern(s) should be screened and protected from insects and vermin entering the storage tank.Mid-level in the water column is the cleanest source of water to be delivered to the pressure pump and can be achieved with a floating/screened suction.
Properly designed and installed conveyance and storage should require little maintenance, but should be looked after by the purveyor. Gutter system and screens should be inspected and cleaned as needed, especially during pollen season. Debrisin the gutter should not be allowed to enter the conveyance lines.Periodic inspections will reduce the buildup of unwanted debris that may cause odor or discoloration of your stored water.
Byconveying and storing your harvested rainwaterproperly, yourpressurizing and filtration system will operate to its greatest potential, producing quality domestic water for bothnon-potable and potable demands.
Skagit County allows residents rainwater collection for household use.
Seattle based RainBank Rainwater Systems and