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         Basin-wide/Regional  | 
     
     
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         WQ: 1973-2000 Dissolved Oxygen at Five Russian River Sites | 
     
 
 
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   Caption:  This chart shows minimum dissolved oxygen levels at five mainstem Russian River sites for the period 1973-2000.   Data were provided by the North Coast Regional Water Quality Control Board (NCRWQCB).  Dissolved oxygen levels dropped below 7.0 mg/L, the NCRWQCB Basin Plan Objective minimum, during some years at all sites except Hopland Bridge.  Number of samples per year varied from 1 to 56.  See InfoLinks for more information.
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 rr_waterquality_jd_cross_do2.db (size 20,480 bytes)  .
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 rr_waterquality_jd.dbf (size 3,141,378 bytes)