City of Boulder Water Quality Monitoring
Boulder Creek Watershed
North Boulder Creek - Boulder Creek
Longitudinal Ortho-phosphate Profiles for November, 1999

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

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 OP_Dis
mg/L as P
NBC-Lw North Boulder Creek diversion to Lakewood 0.00*
NBC-FALLS North Boulder Creek at Boulder Falls 0.04
BC-ORO Boulder Creek at Orodell 0.05
BC-CAN Boulder Creek at Eben G. Fine Park 0.00*
BC-61 Boulder Creek at 61st St. 0.02*
BC-aWWTP Boulder Creek above WW Plant 0.02*
BC-75 Boulder Creek at 75th St 2.21
BC-aDC Boulder Creek above Dry Creek 1.58
BC-95 Boulder Creek at 95th St 1.43
BC-107 Boulder Creek at 107th St 0.83
BC-aCC Boulder Creek Above Coal Creek 0.69
BC-bCC Boulder Creek Below Coal Creek 0.68
*value below detection limit:
Detection Limit (if available) 0.03

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

Return to the BASIN environmental data catalog

INVITATION: BASIN is a community project actively seeking public participation. We appreciate all feedback and welcome comments, suggestions and contributions. To find out more about how you can be involved, click here.

Home | Site Map | Glossary | Bibliography | Contributors
About BASIN | Attribution | Feedback | Search
Last Page Update - Friday December 23, 2005
IMS support provided by