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Caption: Water quality parameters have been measured in an on-going program by the California Department of Fish and Game in various watersheds in Marin and Sonoma counties from 1991-2002. The graph shows yearly minimum, mean, and maximum water temperature measurements in Bloomfield Fork, a tributary to Americano Creek, from 1997-2001. The reference value of 10-15.6°C optimum temperature range for juvenile salmonid rearing is based on McCullough (1999). Maximum water temperatures were in stressful ranges for steelhead. See Map for sampling locations and Info Links for more information.
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