Chlorophyll-a
Why Sample for Chlorophyll-a?
The Authority is tasked with improving, protecting, and preserving water quality for beneficial uses. The Authority samples for chlorophyll α because it can tell us about the amount of algae in the reservoir, and high levels of algae may impact the reservoir's beneficial uses.
Useful Links

Seasonal Mean Concentrations of Chlorophyll-a Measured in Cherry Creek Reservoir
info_outlineEach point on the graph represents a seasonal mean value for samples collected in July, August, and September of that year. The red line represents the chlorophyll a standard for the reservoir. Hover over a point to view the specific value for the corresponding year.
Cherry Creek Reservoir Cholorophyll-a Drilldown
info_outlineEach point on this graph represents a sampling event. The different point colors represent different locations. To learn more about a specific data point, hover over it with your mouse.