0309-1708/$ see front matter 2012 Elsevier Ltd. A http://dx.doi.org/10.1016/j.advwatres.2012.07.017 q The US Department of Agriculture (USDA) prohi programs and activities on the basis of race, color, n and where applicable, sex, marital status, familial sta sexual orientation, genetic information, political belie part of an individual’s income is derived from any pu all prohibited bases apply ...