City of Boulder/USGS Water Quality Monitoring
Boulder Creek Watershed
COB Water Quality Monitoring Sites

Water quality data is collected monthly by the City of Boulder at 6 locations in and around Boulder Reservoir. See the City of Boulder report on Boulder Reservoir water quality for further information.

View monthly data from Boulder Reservoir area
View data as annual time series at a particular location
View data as graphs of water quality parameters on a map


Compare Boulder Reservoir area data

To see graphs of water quality in Boulder Reservoir and nearby sampling locations, use this form. Select the parameter(s) of interest, month, year, and indicate if you also want to see a data table.

Water Temperature Stream Flow pH
Specific Conductance Alkalinity Hardness
Turbidity Total Dissolved Solids Total Suspended Solids
Nitrate and Nitrite Nitrite Ammonia
Total Phosphate Ortho-phosphate Fecal Coliform Bacteria
Dissolved Oxygen Total Organic Carbon All Parameters
Include Data Table

Water Quality Time Series for Boulder Reservoir area

To see graphs of water quality over time at a certain location, use this form. Select the parameter(s) of interest, year, sampling station, and indicate if you also want to see a data table.

Water Temperature Stream Flow pH (Acidity)
Specific Conductance Alkalinity Hardness
Turbidity Total Dissolved Solids Total Suspended Solids
Nitrate and Nitrite Nitrite Ammonia
Total Phosphate Ortho-phosphate Fecal Coliform Bacteria
Dissolved Oxygen Total Organic Carbon All Parameters
Select year Include Data Table
Indicated monitoring site:

Map Displayed Time Series

To see plots of water quality parameters over time at all locations, use this form. Select the year and parameter of interest.

Select year ... and parameter to plot

Water Quality Index Map

To see a map of the NSF Water Quality Index for Boulder Creek use this form. Select the year and month of interest.

Select Month... Select year ...

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Last Page Update - Thursday October 16, 2008