Policy and Legislation
This is necessary due to its potential for damage, erosion, and pollution when it flows quickly and uncontrolled. Existing infrastructure is increasingly unable to handle peak volumes of stormwater while fulfilling the requirements of federal and state Clean Water mandates. Cities and wastewater agencies can be fined when stormwater overwhelms sewage treatment facilities causing spills.
The many stormwater retention strategies, Wholly H2o promotes such as Low Impact Development (LID) are widely recognized as the preferred solutions to this urgent problem. Most local building agencies will require that a permit be obtained for any construction that alters drainage and runoff, because of the possible liability issues involved. But a well-designed stormwater retention system should meet few regulatory roadblocks. Local governments are increasingly likely to mandate these practices in the near future.
San Francisco is again in the lead, with many other cities in California following, with a proposed (Jan, 2010) Stormwater Management Ordinance that requires stormwater BMP’s (mostly Low Impact Development strategies) to be used on large developments and small projects in separate sewer areas. Their motto is “Keep it on Site.”
Here’s another example of stormwater management from the City of Emeryville, which requires this form before giving permits to projects over 10,000 square feet. Permeable pavement, native plantings and educational signage are becoming standard features of city parks and new construction.
The state Stormwater Resource Planning Act, SB 790, allows agencies and non-profits to draw on funds remaining from Proposition 50, the $3.44-billion water security bond passed by California voters in 2002, and Proposition 84, the $5.4-billion safe drinking water bond passed in 2006. These two existing bonds fund projects that reduce or reuse storm water, recharge the groundwater supply, create green spaces and enhance wildlife habitats. The measure took effect Jan. 1, 2010.
The City of LA plans to use the funds to expand the city's rainwater harvesting projects and green infrastructure, including large cisterns, stream restoration, biofiltration and downspout disconnections.
