City of Boulder Storm Water Quality Program
Boulder Creek Watershed
Ortho-phosphate Time Series for 1999
Boulder Creek Below Coal Creek

Preliminary Data - subject to revision

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

Information on Ortho-phosphate:

Phosphorus in natural waters is usually found in the form of phosphates (PO4-3). Phosphates can be in inorganic form (including orthophosphates and polyphosphates), or organic form (organically-bound phosphates). Orthophosphate is sometimes referred to as "reactive phosphorus." Orthophosphate is the most stable kind of phosphate, and is the form used by plants. Orthophosphate is produced by natural processes and is found in sewage.

More general information about Ortho-phosphate
Measurement of Ortho-phosphate
Factors affecting Ortho-phosphate
Standards regarding Ortho-phosphate
Interpretation of Boulder Creek Ortho-phosphate data
Data Source: City of Boulder Water Quality Monitoring
Point of Contact: Chris Rudkin
Collection and Analysis notes
Analysis method: SM 4500-P E

Monitoring site information:
BC-bCC Map
BC-bCC Photo
  • Location: Boulder Creek Below Coal Creek
  • Name: BC-bCC
  • Type: Composite
  • Frequency: Monthly
  • Longitude: 105 ° W 34'
  • Latitude: 40 ° N 50'
  • Elevation: 4955 feet asl
  • Site photo
Downstream Site: North Boulder Creek diversion to Lakewood
Upstream Site: Boulder Creek Above Coal Creek

Plot Label Date OP_Dis
mg/L as P
01 January, 1999 0.72
02 February, 1999 0.65
03 March, 1999 No Data
04 April, 1999 1.66
05 May, 1999 0.13
06 June, 1999 0.20
07 July, 1999 0.44
08 August, 1999 0.20
09 September, 1999 0.38
10 October, 1999 0.56
11 November, 1999 0.68
12 December, 1999 0.81
*value below detection limit:
Detection Limit (if available) 0.03

Preliminary Data - subject to revision

Select on the parameter name to view all Ortho-phosphate time series plots on the basin map. Select on the table date to view stream Ortho-phosphate 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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