City of Boulder Drinking Water Quality Program
Boulder Creek Watershed
Total Alkalinity Time Series for 1998
Middle Boulder Creek at PSCo Weir

Preliminary Data - subject to revision

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

Information on Total Alkalinity:

Alkalinity refers to how well a water body can neutralize acids. Alkalinity measures the amount of alkaline compounds in water, such as carbonates (CO3 2-), bicarbonates (HCO3 -), and hydroxides (OH-). These compounds are natural buffers that can remove excess hydrogen ions that have been added from sources such as acid rain or acid mine drainage. Alkalinity mitigates or relieves metals toxicity by using available HCO3 - and CO3 2- to take metals out of solution, thus making it unavailable to fish. Alkalinity is affected by the geology of the watershed; watersheds containing limestone will have a higher alkalinity than watersheds where granite is predominant. The Boulder Creek Watershed is composed primarily of granite rocks, thus the water has a lower alkalinity content.

More general information about Total Alkalinity
Measurement of Total Alkalinity
Factors affecting Total Alkalinity
Standards regarding Total Alkalinity
Interpretation of Boulder Creek Total Alkalinity data
Data Source: City of Boulder Water Quality Monitoring
Point of Contact: Chris Rudkin
Collection and Analysis notes
Analysis method: SM 2320B

Monitoring site information:
MBCaW Photo
  • Location: Middle Boulder Creek at PSCo Weir
  • Name: MBCaW
  • Type: Composite
  • Frequency: Monthly
  • Longitude: 105 ° W 30'
  • Latitude: 39 ° N 57'
  • Elevation: 8185 feet asl
  • Site photo
Downstream Site: North Boulder Creek at Boulder Falls

Plot Label Date Alk
mg/L as CaCO3
01 January, 1998 27.2
02 February, 1998 26.3
03 March, 1998 28.4
04 April, 1998 24.8
05 May, 1998 17.7
06 June, 1998 14.8
07 July, 1998 11.0
08 August, 1998 18.9
09 September, 1998 18.3
10 October, 1998 20.1
11 November, 1998 24.9
12 December, 1998 27.3
*value below detection limit:
Detection Limit (if available) 1.0

Preliminary Data - subject to revision

Select on the parameter name to view all Total Alkalinity time series plots on the basin map. Select on the table date to view stream Total Alkalinity 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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