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<br />~~B~
<br />
<br />TABLE 3.8: PRESENT WATER QUALITY VARIABLES OF CONCERN,
<br />SELECTED UPPER COLORADO RIVER SUBBASINS
<br />
<br />l'\)
<br />~ River Subbasin
<br />W (Gauge Used)
<br />'-il
<br />
<br />WAU
<br />
<br />White R., Colo.
<br />(Meeker)
<br />
<br />140500
<br />
<br />Whi te R., Utah
<br />(Watson)
<br />
<br />140500
<br />
<br />Yampa R., Colo.
<br />(Maybell)
<br />
<br />140500
<br />
<br />:,~~ih
<br />
<br />San Juan R., N. Mex. 140801
<br />(Archuleta, Shiprock)
<br />
<br />Colo. R., Colo. 140100
<br />(Colo.-Utah State line)
<br />
<br />Green R., Wyo. 140401
<br />(La Barge, Wyo.;
<br />Greendale, Utah)
<br />
<br />Green R., Utah 140600
<br />(Green River, Utah)
<br />
<br />Variables of Concern
<br />and References
<br />
<br />55, DS, 504, Fe, Zn,
<br />N, and P
<br />
<br />OS, S5, Cu, B, alpha
<br />and beta
<br />
<br />5S, DO, toxic metals,
<br />pH, specific conduc-
<br />tance (Wentz and
<br />Steele, 1978)
<br />
<br />DS,SS, P, N, pH, Fe,
<br />and Hg
<br />
<br />OS, conductivity,
<br />S04' N03 (as N) and DO
<br />
<br />SS, OS, pH, SO 4 '
<br />temperature, fecal
<br />coliform
<br />
<br />OS and SS
<br />(Maxell, 1978)
<br />
<br />Comments & References
<br />
<br />Short period of record
<br />and few data points,
<br />but 05, SS, and S04'
<br />generally show expected
<br />changes in concentration
<br />during high- and 10101-
<br />flow periods.
<br />
<br />Longer period of record
<br />than Meeker; OS and S04
<br />worthy of note.
<br />
<br />Natural concentrations
<br />of Fe and Mil may exceed
<br />Colorado water quality
<br />standards for these
<br />toxic metals (Wentz and
<br />Steele, 1978).
<br />
<br />SS of concern especially;
<br />irrigated agriculture
<br />runoff contributes to N
<br />and P concerns.
<br />
<br />Available data from
<br />UPGRADE indicates 504
<br />and N03 worthy of note.
<br />
<br />504, DS, and temperature
<br />data from UPGRADE show
<br />some trends.
<br />
<br />DS and 55 only para-
<br />meters of note (Maxell,
<br />1978) .
<br />
<br />Source: D.A. Wentz and T.D. Steele, "An Analysis of Ambient Stream Quality
<br />in the Yampa River Basin, Colorado and Wyomini', U.5. Geological
<br />Survey report (forthcoming).
<br />
<br />Telephone interview with M. Maxell, chief, Monitoring Section,
<br />Bureau of Pollution Control, Utah Department of Health, July 31,
<br />1978.
<br />
<br />," "J
<br />".~.:.;.
<br />
<br />Also see bibliography.
<br />
<br />3-21
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