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

Preliminary Data - subject to revision


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

Information on Specific Conductance:

Specific Conductance is a measure of how well water can pass an electrical current. It is an indirect measure of the presence of inorganic dissolved solids, such as chloride, nitrate, sulfate, phosphate, sodium, magnesium, calcium, and iron. These substances conduct electricity because they are negatively or positively charged when dissolved in water. The concentration of dissolved solids, or the conductivity, is affected by the bedrock and soil in the watershed. It is also affected by human influences. For example, agricultural runoff can raise conductivity because of the presence of phosphate and nitrate.

More general information about Specific Conductance
Factors affecting Specific Conductance
Standards regarding Specific Conductance
Interpretation of Boulder Creek Specific Conductance data
Data Source: USGS Aqueous Organic Carbon Study
Point of Contact: Larry Barber
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 SC
µ mhos/cm
MBC-ELDORA Middle Boulder Creek above town of Eldora 38
MBC-WTP Middle Boulder Creek @ Nederland WTP No Data
MBCaW Middle Boulder Creek at PSCo Weir 48
BC-aNBC Middle Boulder Creek Above North Boulder Creek Confluence 84
BC-ORO Boulder Creek at Orodell 54
BC-CAN Boulder Creek at Eben G. Fine Park 61
BC-30 Boulder Creek at 30th St. 118
BC-61 Boulder Creek at 61st St. 232
BC-aWWTP Boulder Creek above WW Plant 240
BC-75 Boulder Creek at 75th St 569
BC-aDC Boulder Creek at Dry Creek 449
BC-95 Boulder Creek at 95th St 472
BC-107 Boulder Creek at 107th St 510
BC-aCC Boulder Creek Above Coal Creek 510
BC-bCC Boulder Creek Below Coal Creek 771
BC-aSV Boulder Creek above St. Vrain 695
*value below detection limit:
Detection Limit (if available) 1.0

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.

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