BASIN-USGS-COB Boulder Creek Millenium Baseline
Boulder Creek Watershed
Water Quality Data Data for 2000 - Boulder Creek at 75th St

Preliminary Data - subject to revision

Data Source: BASIN-USGS-COB Boulder Creek Millenium Baseline
Point of Contact: Sheila Murphy

Monitoring site information:
BC-75 Map
  • Location: Boulder Creek at 75th St
  • Name: BC-75
  • Type: Composite
  • Frequency: SemiAnnual
  • Longitude: 105 ° W 10'
  • Latitude: 40 ° N 30'
  • Elevation: 5105 feet asl
  • Site photo
Downstream Site: Boulder Creek above WW Plant
Upstream Site: Boulder Creek at Dry Creek

Parameter Units High Flow Value Lower Detection LimitRange Ceiling
Water Temperature° C 18.00 0.0 
Dissolved Oxygenmg/L 7.20   15
Dissolved Oxygen % of Saturation- No Data   200
Specific Conductanceµ mhos/cm 326 1.01000
pHstnd units 7.19 NA 
Total Organic Carbonmg/L 5.43   10
Stream Flowcfs 181.00   250
Total Alkalinitymg/L as CaCO3 52.5 1.0120
Total Hardnessmg/L as CaCO3 260.0 0.1 
Nitritemg/L as N 0.3 0.0011.2
Nitratemg/L as N 4.5 0.025.0
Nitratemg/L as N 4.9 0.0015.0
Nitrate + Nitritemg/L as N No Data 0.120.0
Ammoniamg/L as N 2.10 0.12.5
Total Phosphatemg/L as P 0.90 0.036.0
Fecal Coliform#/100 mL No Data 1.0150
Total Suspended Solidsmg/L 8 1100
Total Dissolved Solidsmg/L 194 1660
TurbidityNTU 4.68 0.0160
* indicates measured value below analysis detection limit listed in forth column:
* indicates measured value exceeds plot scale range listed in fifth column:

Preliminary Data - subject to revision

Select on the parameter name to view more detailed information on that parameter at this station. Select on the table date to view stream data profiles observed on that date.

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