Ninth Circuit rules that owners of storm water systems (e.g., cities, counties, districts) are liable for discharges of polluted stormwater into rivers and ocean

It is well known that stormwater gathers a variety of pollutants as it flows across the landscape and even through stormwater drainage systems. See, for example, http://cfpub.epa.gov/npdes/home.cfm?program_id=6 and http://www.epa.gov/owow_keep/NPS/index.html . In NRDC v. County of Los Angeles, Ninth...