City of Boulder/USGS Water Quality Monitoring
Boulder Reservior Watershed
Boulder Reservoir and its Tributaries
for August, 1999

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 Reservior Specific Conductance data
Data Source:
Point of Contact:
Collection and Analysis notes
Analysis method: YSI 600XL probe

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
DC Dry Creek 1304
BFCaBR Boulder Feeder Canal at Boulder Reservoir 113
BR_SDB Boulder Reservoir South Dam - Bottom 337
BR_SDT Boulder Reservoir South Dam - Top 341
BCSC Boulder Creek Supply Canal 329
LDC Little Dry Creek 727
UNK Unknown Ditch 1154
*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.

Return to the BASIN water quality catalog

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