This is the type of in-stream monitoring system used by Fort Collins, Colo., to practice sustainability. It monitors pressure to determine flow and conductivity to calculate chloride concentration. Individuals at Colorado State University check these monitors and then report the fi ndings back to the city. (Photo provided by the city of Fort Collins, Colo.)

This is the type of in-stream monitoring
system used by Fort Collins, Colo., to
practice sustainability. It monitors pressure to
determine flow and conductivity to calculate chloride concentration.
Individuals at Colorado State University check these monitors and then report the fi ndings
back to the city. (Photo provided by the city of Fort Collins, Colo.)