BASIN-USGS-COB Boulder Creek Millenium Baseline
Boulder Creek Watershed
Specific Conductance Data for 2000 - North Boulder Creek at Boulder Falls

Preliminary Data - subject to revision


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

Monitoring site information:
NBC-FALLS Map
  • Location: North Boulder Creek at Boulder Falls
  • Name: NBC-FALLS
  • Type: Composite
  • Frequency: SemiAnnual
  • Longitude: 105 ° W 24'
  • Latitude: 40 ° N 35'
  • Elevation: 6880 feet asl
  • Site photo
Downstream Site: North Boulder Creek diversion to Lakewood
Upstream Site: Middle Boulder Creek Above North Boulder Creek Confluence

Date SC
µ mhos/cm
June, 2000 29
October, 2000 72
*value below detection limit:
Detection Limit (if available) 1.0

Preliminary Data - subject to revision

Select on the parameter name to view all Specific Conductance time series plots on the basin map. Select on the table date to view stream Specific Conductance profiles observed on that date. Select here to view all parameters at this site.

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Return to the BASIN environmental data catalog


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