OHA Drinking Water Services
OR41
PWS ID: 00493 ---- LYONS MEHAMA WATER DISTRICT
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
4Q2015 Nov 10, 2015 2DBP-01 NORTH RESERVOIR WHEN WTP OFF 0.011 0.012 0.007 0.006
3Q2015 Sep 09, 2015 2DBP-01 NORTH RESERVOIR WHEN WTP OFF 0.011 0.013 0.008 0.008
2Q2015 May 13, 2015 2DBP-01 NORTH RESERVOIR WHEN WTP OFF 0.011 0.009 0.009 0.009
1Q2015 Mar 12, 2015 2DBP-01 NORTH RESERVOIR WHEN WTP OFF 0.011 0.010 0.009 0.009
4Q2014 Nov 07, 2014 2DBP-01 NORTH RESERVOIR WHEN WTP OFF 0.011 0.012 0.011 0.010
3Q2014 Sep 09, 2014 2DBP-01 NORTH RESERVOIR WHEN WTP OFF 0.011 0.012 0.009 0.011
2Q2014 Jun 17, 2014 2DBP-01 NORTH RESERVOIR WHEN WTP OFF 0.007 0.010 0.006
1Q2014 Mar 11, 2014 2DBP-01 NORTH RESERVOIR WHEN WTP OFF 0.004 0.004
4Q2013 Dec 05, 2013 2DBP-01 NORTH RESERVOIR WHEN WTP OFF 0.002 0.001