BASIN-USGS-COB Boulder Creek Millenium Baseline
Boulder Creek Watershed
Middle Boulder Creek - Boulder Creek
Longitudinal Turbidity Profiles for October, 2000

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
Factors affecting Turbidity
Standards regarding Turbidity
Interpretation of Boulder Creek Turbidity data
Data Source:
Point of Contact:
Collection and Analysis notes

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
NTU
MBC-ELDORA Middle Boulder Creek above town of Eldora 0.22
MBC-WTP Middle Boulder Creek @ Nederland WTP 0.66
MBCaW Middle Boulder Creek at PSCo Weir 0.50
BC-aNBC Middle Boulder Creek Above North Boulder Creek Confluence 0.38
BC-ORO Boulder Creek at Orodell 3.00
BC-CAN Boulder Creek at Eben G. Fine Park 1.74
BC-30 Boulder Creek at 30th St. 2.76
BC-61 Boulder Creek at 61st St. 2.30
BC-aWWTP Boulder Creek above WW Plant 5.30
BC-75 Boulder Creek at 75th St 3.80
BC-aDC Boulder Creek at Dry Creek 4.10
BC-95 Boulder Creek at 95th St 3.00
BC-107 Boulder Creek at 107th St 2.10
BC-aCC Boulder Creek Above Coal Creek 2.20
BC-bCC Boulder Creek Below Coal Creek 9.20
BC-aSV Boulder Creek above St. Vrain 3.10
*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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