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<br />TABLE I
<br />
<br />Temperature
<br />
<br />Maximum 680 F
<br />Maximum change 20 F
<br />
<br />6.0 - 9.0
<br />
<br />6 mg/l minimum
<br />
<br />Geometric mean of
<br />1000/100 ml from five
<br />samples in 30-day pertti.a
<br />
<br />410
<br />
<br />6l0F
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<br />WATER QUALITY STANDARDS AND DATA. SUMMARY
<br />
<br />Parameter
<br />
<br />Colorado Class Bl Standard
<br />
<br />Williams Creek
<br />(Range)
<br />
<br />pH
<br />Dissolved Oxygen
<br />Fecal Coliform Bacteria
<br />
<br />7.2 9.5
<br />0.5 9.3
<br />
<br />o - 22
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<br />
<br />Phosphorus as P
<br />
<br />Recommended Federal
<br />Water Quality Criteria
<br />For Fresh Water Organisms
<br />
<br />Not greater .than
<br />.1 mg/l in flowing
<br />
<br />.25
<br />
<br />1.88
<br />
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<br />
<br />NO COLORADO STfu~ARDS FOR THE FOLLOWING PARAMETERS
<br />
<br />stream.s
<br />
<br />Nitrogen as N
<br />
<br />Naturally occuring ratio
<br />with phosphorus (usually
<br />
<br />No standard
<br />
<br />0.3 - 2.8
<br />10:1)
<br />
<br />14 - 36 .
<br />
<br />22 36
<br />
<br />45 73
<br />
<br />6 -125
<br />
<br />Hardness
<br />
<br />i\..1kalinity
<br />Specific Conduct~nce
<br />Percent Oxygen Saturation
<br />
<br />Not lower than 20
<br />No standard
<br />
<br />At or near saturation
<br />
<br />Recommended Federal
<br />Surface Water Criteria
<br />For Public Water Supplies
<br />
<br />Total Coliform Bacteria
<br />
<br />100/100 ml
<br />
<br />o - 58
<br />
<br />:
<br />
<br />
<br />Sources:
<br />
<br />Water QpalityStandards and Stream ClasSification, Colorado Depart-
<br />ment of Health, Effective: June 19, 1974
<br />
<br />Water Quality .Criteria,
<br />
<br />Federal Water Pollution Cdntrol.Administration
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<br />5
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