OHA Drinking Water Services
OR41
PWS ID: 00372 ---- HERMISTON, CITY OF


Water System History    -   Click here for Detail View
Date of
Status Change		 Active or
Inactive		 Primary
Source		 PWS
Type		 Population PWS
Name
Current Status
12/05/2025		ASWC20,000        HERMISTON, CITY OF
12/05/2025ASW C 19,696        HERMISTON, CITY OF
09/02/2022ASW C 18,200        HERMISTON, CITY OF
03/03/2020ASW C 17,107        HERMISTON, CITY OF
06/29/2016ASW C 16,939        HERMISTON, CITY OF
02/14/2014ASW C 15,410        HERMISTON, CITY OF
01/18/2007ASW C 14,120        HERMISTON, CITY OF
12/19/2003ASW C 12,400        HERMISTON, CITY OF


Annual Operating Period History
Population
Type		 Avg Daily
Population		 Start
Month		 Start
Day		 End
Month		 End
Day		 Effective
Begin Date		 Effective
End Date
Residential2000011123111/13/2025
Residential1969611123108/03/202211/12/2025
Residential1820011123109/18/201908/02/2022
Residential1710711123105/24/201609/17/2019
Residential1693911123112/12/201305/23/2016
Residential1541011123101/01/200712/11/2013
Residential1412011123110/23/200312/31/2006
Residential12400111231First Record10/22/2003