Unkempt backyard pools can breed millions of disease-carrying mosquitoes.  The Santa Clara County Vector Control Office uses an aerial photography system to track and treat those stagnant swimming holes.  The “revolutionary” system and has drastically reduced the risk of West Nile and other diseases in the county, says Vector Control chief Russ Parman.

This video explores how the aerial photo system works, the innovative ways the county combats mosquitoes in dirty pools, and what happens to homeowners who refuse to keep their pools clean.