The Nogales Wash, a tributary of the Santa Cruz River, is the main environmental feature of the urban corridor formed by Nogales, Arizona and Nogales, Sonora. This binational urban area has experience an accelerated growth during the last decades, primarily because immigration and industrialization in the Mexican side of the border. The 2005 census notes a population of 193,500 in Nogales, Sonora with an annual growth rate of 4.2% (INEGI, 2006). That suggests the population in Nogales will double around the year 2020, reaching at that point in time approximately 400,000 residents. The rapid growth of Nogales, Sonora has put huge pressure on Mexican authorities to provide essential public services, particularly in the area of potable and wastewater infrastructure. Rapid urbanization and industrialization in Nogales also has created an exponential growth of impervious area, multiplication of non-point pollution sources, industrial contamination, erosion and disruption of water streams, and increased flooding risk in areas not suitable for urbanization. (Sanchez 1995, Norman 2006). The combined effect of these changes has resulted in serious water quality degradation affecting both sides of the border. The establishment of land use policies within a watershed management framework is required to mitigate the consequences of rapid growth.
|Effective start/end date||10/1/08 → 12/31/10|
- EPA: Region 9: $54,807.00