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Caption: The graph shows average, minimum, and maximum pH measured in Americano Creek, and its estuary, Estero Americano, during 1988-1990. Sampling occurred generally monthly, with the number of pH measurements at each station ranging from 15 to 27 samples for the monitoring period. Note that Stations E-1 through E-5 are estuarine. The reference values represent the North Coast Regional Water Quality Control Board (NCRWQCB) 2001 Basin Plan pH range objective of 6.5-8.5 (CRWQCB, 2001). This monitoring was part of a water quality study of Americano and Stemple Creeks by Merritt Smith Consulting for the City of Santa Rosa and U.S. Army Corps of Engineers. See Picture for a map of the sampling locations and Info Links for more details.
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