Environmental issues caused by increased stormwater flows and pollutants in the waterways is a world-wide problem. Australia is in the forefront of research and implementations to curb these impacts. The CRC for Water Sensitive Cities in Australia conducted a really interesting study that compares the “willingness to pay” for stormwater improvements and income level. A summary of the study can be found here: http://watersensitivecities.org.au/wp-content/uploads/2014/09/IndustryNoteA1.1-Web.pdf