City of Boulder Water Quality Monitoring
Boulder Creek Watershed
North Boulder Creek - Boulder Creek
Longitudinal Turbidity Profiles for June, 1999

Preliminary Data - subject to revision

Marker Indicates no data available
Marker Indicates data exceeds plot scale.

Information on Turbidity:

Turbidity is a measure of the cloudiness of the water. Cloudiness is caused by suspended solids or organic matter including silt, microorganisms, plant fibers, sawdust chemicals and coal dust. High levels of turbidity can block light from reaching submerged aquatic vegetation and can raise surface water temperatures because the suspended particles absorb heat from sunlight. The most frequent causes of turbidity are from logging, road and building construction, and mining activity. Turbidity affects fish by decreasing light penetration thus reducing the amount of photosynthesis taking place in the water. This reduces the amount of oxygen available to fish. Large amounts of suspended solids can also clog fish gills, and it affects their ability to see and catch foo

More general information about Turbidity
Measurement of Turbidity
Factors affecting Turbidity
Standards regarding Turbidity
Interpretation of Boulder Creek Turbidity data
Data Source: City of Boulder Water Quality Monitoring
Point of Contact: Chris Rudkin
Collection and Analysis notes
Analysis method: Hach 2100N

Indicated monitoring site:

The above map indicates water quality monitoring sites. To view data at a specific site select it from the map with the mouse.

Plot Label SiteName Turb
NBC-Lw North Boulder Creek diversion to Lakewood 3.79
NBC-FALLS North Boulder Creek at Boulder Falls No Data
BC-ORO Boulder Creek at Orodell No Data
BC-CAN Boulder Creek at Eben G. Fine Park No Data
BC-61 Boulder Creek at 61st St. No Data
BC-aWWTP Boulder Creek above WW Plant No Data
BC-75 Boulder Creek at 75th St No Data
BC-aDC Boulder Creek above Dry Creek No Data
BC-95 Boulder Creek at 95th St No Data
BC-107 Boulder Creek at 107th St No Data
BC-aCC Boulder Creek Above Coal Creek No Data
BC-bCC Boulder Creek Below Coal Creek No Data
*value below detection limit:
Detection Limit (if available) 0.01

Preliminary Data - subject to revision

Select on the parameter name to view more detailed information for that parameter in this month. Select on the site name to view data time series observed at that station. For monitoring site locations see site location map.

Return to the BASIN water quality catalog

Return to the BASIN environmental data catalog

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