OHA Drinking Water Services
OR41
PWS ID: 00985 ---- HILLSBORO-CHERRY GROVE
LRAAs and OELs

LRAA = Locational running annual average; OEL = Operational evaluation level. Learn about OELs here.
Averages are subject to change as new data is taken into consideration.

TTHM MCL = 0.080 mg/L,  HAA5 MCL = 0.060 mg/L.  MCL exceedances are indicated with red text.

Monitoring
Period		 Last
Sample		 Sample
Point		 Location TTHM
LRAA		 TTHM
OEL		 HAA5
LRAA		 HAA5
OEL
4Q2014 Oct 02, 2014 2DBP-01 #36 PATTON VALLEY CONTROL VALVE 0.015 0.016 0.017 0.015
3Q2014 Jul 01, 2014 2DBP-01 #36 PATTON VALLEY CONTROL VALVE 0.017 0.014 0.018 0.017
2Q2014 Apr 07, 2014 2DBP-01 #36 PATTON VALLEY CONTROL VALVE 0.013 0.017 0.015 0.019
1Q2014 Jan 13, 2014 2DBP-01 #36 PATTON VALLEY CONTROL VALVE 0.010 0.011
4Q2013 Oct 02, 2013 2DBP-01 #36 PATTON VALLEY CONTROL VALVE 0.006 0.005