City of Boulder Storm Water Quality Program
Boulder Creek Watershed
Specific Conductance Time Series for 2000
Boulder Creek at 75th St

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
Measurement of Specific Conductance
Factors affecting Specific Conductance
Standards regarding Specific Conductance
Interpretation of Boulder Creek Specific Conductance data
Data Source: City of Boulder Water Quality Monitoring
Point of Contact: Chris Rudkin
Collection and Analysis notes
Analysis method: YSI 600XL probe

Monitoring site information:
BC-75 Map
BC-75 Photo
  • Location: Boulder Creek at 75th St
  • Name: BC-75
  • Type: Composite
  • Frequency: Monthly
  • Longitude: 105 ° W 10'
  • Latitude: 40 ° N 30'
  • Elevation: 5105 feet asl
  • Site photo
Downstream Site: Boulder Creek above Dry Creek
Upstream Site: Boulder Creek above WW Plant

Plot Label Date SC
µ mhos/cm
01 January, 2000 370
02 February, 2000 436
03 March, 2000 604
04 April, 2000 604
05 May, 2000 435
06 June, 2000 325
07 July, 2000 276
08 August, 2000 180
09 September, 2000 400
10 October, 2000 572
11 November, 2000 No Data
12 December, 2000 No Data
*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.

Return to the BASIN water quality catalog

Return to the BASIN environmental data catalog


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