The concrete, asphalt, and other impervious surfaces in urban areas have disrupted the natural hydrology of our landscape. Unmanaged urban stormwater impairs the quality of local waterways and increases the potential for localized flooding. Harvesting urban stormwater is a viable alternative to supplement local water supplies, recharge over-drafted groundwater tables, enhance return flows to streams, and improve the quality of local waterways.
2NDNATURE methods suggest the CA average annual urban stormwater opportunity exceeds 2.0 million acre-feet annually. 52% of this urban stormwater (350 billion gallons/year on average) is generated directly atop a mapped groundwater basin.
Use this INTERACTIVE MAP created by the science team at 2NDNATURE to explore the opportunities.