OHA Drinking Water Services
OR41
PWS ID: 00194 ---- CLATSKANIE, CITY OF
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
4Q2020 Dec 02, 2020 2DBP-01 WEST CREEK STANDPIPE 0.028 0.031 0.030 0.034
3Q2020 Sep 23, 2020 2DBP-01 WEST CREEK STANDPIPE 0.024 0.030 0.033 0.034
2Q2020 Jun 24, 2020 2DBP-01 WEST CREEK STANDPIPE 0.030 0.020 0.032 0.027
1Q2020 Mar 18, 2020 2DBP-01 WEST CREEK STANDPIPE 0.031 0.028 0.033 0.030
4Q2019 Dec 10, 2019 2DBP-01 WEST CREEK STANDPIPE 0.031 0.030 0.033 0.040
3Q2019 Sep 25, 2019 2DBP-01 WEST CREEK STANDPIPE 0.035 0.042 0.030 0.034
2Q2019 Jun 12, 2019 2DBP-01 WEST CREEK STANDPIPE 0.022 0.023 0.023 0.025
1Q2019 Mar 27, 2019 2DBP-01 WEST CREEK STANDPIPE 0.017 0.017 0.016 0.016
3Q2014 Sep 10, 2014 2DBP-01 WEST CREEK STANDPIPE 0.017 0.019 0.024 0.023
2Q2014 Jun 11, 2014 2DBP-01 WEST CREEK STANDPIPE 0.012 0.017 0.018 0.024
1Q2014 Mar 12, 2014 2DBP-01 WEST CREEK STANDPIPE 0.007 0.013
4Q2013 Dec 30, 2013 2DBP-01 WEST CREEK STANDPIPE 0.003 0.007