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Caption: This graph shows one-time sampling measurements of pH at five stations (going downstream from left to right) in Salmon Creek on June 22, 2001. The very high pH of 10 at Highway 1 is likely related to an algae bloom and may trigger conversion of any ammonia present to the un-ionized form, which can be highly toxic to fish. 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). These data were collected by the North Coast Regional Water Quality Control Board as a part of the Surface Water Ambient Monitoring Program (SWAMP). See Info Links for more information.
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