Is promotion ofrainwater collection an opportunity for counties in Washington State to control stormwater?
As of October 2009, rainwater collection is legal in all counties in Washington State. Many county Health Departments are allowing collected rainwater for potable use as well. King County, the largest county in the state, allows for potable usage. Seattle Public Utilities offers rebates for rain gardens in certain areas of Seattle such as Ballard. The Rainwise Program encourages home owners to collect and use roof runoff to help control storm water. Many consumers have taken advantage of this program and are practicing good storm water control. The GSI or “green storm water infrastructure“mandate addresses the issue of storm water runoff for new construction by total infiltration of impervious surfaces on site.
But what about all the existing buildings and houses throughout our state including Seattle area, wherestormwaterrunoff still overwhelms sewer systems, causing intentional sewage release into the Puget Sound during large rain events?
What can the counties and municipalities do to encourage existing building and home owners to control their runoff, thus reducing or eliminating these large releases? Public awareness is an excellent start. Countyand municipality funded educationusing media andpublicservice announcements promoting rainwater catchment practices while offering incentives such as theRainwise program would generate interest. A properly funded program of encouragement and incentives would create morepublicinterest to adopt rainwater collection, as it has with the Rainwise Program, while money being spent to promote would be absorbed by the cost savings totheoverwhelmed systems we experience now.
Rainfall collection and use can be part of thesolution to Seattle’s storm water issue, augmenting the GSI mandate by addressing runoff, not only from new construction, but from existing buildings and homes as well. It’s fair to saythat most Seattleites would welcome being part of the solution — if given the opportunity.
New stormwater regulations forrunoff and green storm water infrastructure are adding to the costs of new residential and commercial construction in Seattle and elsewhere. Infiltration of runoff from roofs, driveways, and all impervious surfaces are mandated by local and Federal agencies. While infiltration does help reduce storm water runoff, the added costs of implementing infiltration or a rain garden can be considerable, with no return on investment for the home owner or building’s owner.
While the average monthly billing increases are not enough to pay for a rainwater catchment system, the costs of designing and implementing an infiltration system or a rain garden are significant enough that if redirected to designing and building a rainwater collection system along with lower water and sewer bills, a homeowner or building owner will recognize a return on investment.
the soil during watering will reduce the building’s stormwater runoff and save money by not using city water.