Surface Water Inflow Concentrations
Highlights:
In WY 2022, total phosphorus concentrations in both Cherry Creek and Cottonwood Creek were higher than the previous five year (2017-2021) average, and lower than the historical (WY 2000-2016) values. Phosphorus concentrations in Cottonwood Creek are 70% lower than concentrations in Cherry Creek.
In WY 2022, total nitrogen concentrations in both Cherry Creek and Cottonwood Creek were higher than both the previous five-year (2017-2021) average and the historical (WY 2000-2016) values. Nitrogen concentrations in Cherry Creek were 25% lower than concentrations in Cottonwood Creek.
Cherry Creek flows from south to north to the Reservoir through a 245,000-acre drainage basin. The basin includes various types of land use, including both agriculture and heavy development, as well as permitted discharges in and around Cherry Creek. Cottonwood Creek is the other major surface water input to Cherry Creek Reservoir. Land in the Cottonwood Creek watershed is more urbanized than the Cherry Creek watershed.
Influent Summary Concentrations - Total Nitrogen
| Water Year | Cherry Creek | Cottonwood Creek |
|---|---|---|
| WY 2017-2021 | 1,501 ug/l | 1,984 ug/l |
| WY 2020 | 1,501 ug/l | 2,479 ug/l |
| WY 2021 | 1,396 ug/l | 1,856 ug/l |
| WY 2022 | 1,680 ug/l | 2,245 ug/l |
Influent Summary Concentrations - Total Phosphorus
| Water Year | Cherry Creek | Cottonwood Creek |
|---|---|---|
| WY 2017-2021 | 203 ug/l | 62 ug/l |
| WY 2020 | 188 ug/l | 53 ug/l |
| WY 2021 | 203 ug/l | 65 ug/l |
| WY 2022 | 217 ug/l | 66 ug/l |
For more annual comparisons visit the WQ Update WQ Inflow Comparison Page.
Useful Links
Phosphorus Concentrations, CC-10 and CT-2
info_outlineEach point on this graph represents a sampling event. The different point colors represent different locations, while the filled and hollow icons indicate whether the parameter is total or dissolved. To learn more about a specific data point, hover over it with your mouse.
Nitrogen Concentrations, CC-10 and CT-2
info_outlineEach point on this graph represents a sampling event. The different point colors represent different locations, while the filled and hollow icons indicate whether the parameter is total or dissolved. To learn more about a specific data point, hover over it with your mouse.
Total Suspended Solids (TSS) Concentrations, CC-10 and CT-2
info_outlineEach point on this graph represents a sampling event. The different point colors represent different locations, while the filled and hollow icons indicate whether the parameter is total or dissolved. To learn more about a specific data point, hover over it with your mouse.
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