Most King County offices will be closed on Thursday and Friday, Nov. 22-23, 2018, for the Thanksgiving holiday.  
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Select All Parameters
Select Water Quality Parameters




Select High Precision pH Parameters (Note: final data are only available after validation and recalculation)
Select Meteorological Parameters



Available range is from 1/15/2009 to 11/18/2018.
Start Date:     End Date:          


Parameter Range Check Values and End Check Condition