Most King County offices will be closed on Thursday and Friday, Nov. 22-23, 2018, for the Thanksgiving holiday.  
King County logo

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