Water harvesting The city of Tucson, Arizona provides financial incentives for residents to harvest their rainwater. Tucson's water supply, like many Western cities, is drawn from two main sources: surface water that is pumped more than 300 miles from the Colorado River and groundwater. The pump expends a significant amount of energy and the Colorado River is diminishing as a result of climate change and overuse.
Water harvesting The city of Tucson, Arizona provides financial incentives for residents to harvest their rainwater. Tucson's water supply, like many Western cities, is drawn from t.wo main sources: surface water that is pumped more than 300 miles from the Colorado River and groundwater The pump expends a significant amount of energy and the Colorado River is diminishing as a result of climate change and overuse.