City of Boulder Drinking Water Quality Program
Boulder Creek Watershed
Dissolved Oxygen Time Series for 1999
North Boulder Creek diversion to Lakewood

Preliminary Data - subject to revision

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

Information on Dissolved Oxygen:

Dissolved Oxygen (DO) is the amount of oxygen dissolved in the water. DO is a very important indicator of a water body's ability to support aquatic life. The amount of DO in water depends on several factors, including temperature (the colder the water, the more oxygen can be dissolved); the volume and velocity of water flowing in the water body; and the amount of organisms using oxygen for respiration. The amount of oxygen dissolved in water is expressed as a concentration, in milligrams per liter (mg/l) of water. The optimal DO for adult brown trout is 9-12 mg/l. Human activities that affect DO levels include the removal of riparian vegetation, runoff from roads, and sewage discharge.

More general information about Dissolved Oxygen
Measurement of Dissolved Oxygen
Factors affecting Dissolved Oxygen
Standards regarding Dissolved Oxygen
Interpretation of Boulder Creek Dissolved Oxygen 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:
NBC-Lw Map
NBC-Lw Photo
  • Location: North Boulder Creek diversion to Lakewood
  • Name: NBC-Lw
  • Type: Composite
  • Frequency: Monthly
  • Longitude: 105 ° W 30'
  • Latitude: 39 ° N 59'
  • Elevation: 8240 feet asl
  • Site photo
Downstream Site: North Boulder Creek at Boulder Falls

Plot Label Date DO
01 January, 1999 10.26
02 February, 1999 10.37
03 March, 1999 10.57
04 April, 1999 9.97
05 May, 1999 9.82
06 June, 1999 7.45
07 July, 1999 7.82
08 August, 1999 7.85
09 September, 1999 9.04
10 October, 1999 9.37
11 November, 1999 10.34
12 December, 1999 10.38
*value below detection limit:
Detection Limit (if available)  

Preliminary Data - subject to revision

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

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