OHA Drinking Water Services
OR41
PWS ID: 00062 ---- YOUNGS RIVER LEWIS & CLARK WD
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
1Q2024 Feb 16, 2024 2DBP-01 FORT CLATSOP 0.009 0.008 0.002 0.002
1Q2024 Feb 16, 2024 2DBP-02 35456 WOODLAND LANE 0.013 0.012 0.004 0.002
4Q2023 Oct 13, 2023 2DBP-01 FORT CLATSOP 0.009 0.011 0.002 0.004
4Q2023 Oct 13, 2023 2DBP-02 35456 WOODLAND LANE 0.015 0.014 0.006 0.006
3Q2023 Jul 14, 2023 2DBP-01 FORT CLATSOP 0.008 0.007 0 0
3Q2023 Jul 14, 2023 2DBP-02 35456 WOODLAND LANE 0.014 0.013 0.004 0.006
2Q2023 Apr 17, 2023 2DBP-01 FORT CLATSOP 0.008 0.008 0 0
2Q2023 Apr 17, 2023 2DBP-02 35456 WOODLAND LANE 0.014 0.016 0.004 0.006
1Q2023 Jan 18, 2023 2DBP-01 FORT CLATSOP 0.008 0.008 0 0
1Q2023 Jan 18, 2023 2DBP-02 35456 WOODLAND LANE 0.014 0.015 0.004 0.005
4Q2022 Oct 13, 2022 2DBP-01 FORT CLATSOP 0.008 0.009 0 0
4Q2022 Oct 13, 2022 2DBP-02 35456 WOODLAND LANE 0.010 0.012 0.001 0.002
3Q2022 Jul 15, 2022 2DBP-01 FORT CLATSOP 0.006 0.006 0 0
3Q2022 Jul 15, 2022 2DBP-02 35456 WOODLAND LANE 0.009 0.009 0.002 0.002
2Q2022 Jun 07, 2022 2DBP-01 FORT CLATSOP 0.005 0.006 0 0
2Q2022 Jun 07, 2022 2DBP-02 35456 WOODLAND LANE 0.009 0.010 0.003 0.003
1Q2022 Mar 11, 2022 2DBP-01 FORT CLATSOP 0.005 0.005 0 0
1Q2022 Mar 11, 2022 2DBP-02 35456 WOODLAND LANE 0.009 0.005 0.004 0.002
4Q2021 2DBP-01 FORT CLATSOP
4Q2021 2DBP-02 35456 WOODLAND LANE
3Q2021 Jul 20, 2021 2DBP-01 FORT CLATSOP 0.027 0.008 0.033 0.004
3Q2021 Jul 20, 2021 2DBP-02 35456 WOODLAND LANE 0.027 0.012 0.018 0.004
2Q2021 Apr 16, 2021 2DBP-01 FORT CLATSOP 0.038 0.027 0.041 0.044
2Q2021 Apr 16, 2021 2DBP-02 35456 WOODLAND LANE 0.042 0.029 0.024 0.019
1Q2021 Jan 25, 2021 2DBP-01 FORT CLATSOP 0.055 0.042 0.057 0.043
1Q2021 Jan 25, 2021 2DBP-02 35456 WOODLAND LANE 0.054 0.042 0.030 0.030
4Q2020 Oct 01, 2020 2DBP-01 FORT CLATSOP 0.060 0.069 0.070 0.085
4Q2020 Oct 01, 2020 2DBP-02 35456 WOODLAND LANE 0.065 0.068 0.047 0.045
3Q2020 Jul 30, 2020 2DBP-01 FORT CLATSOP 0.066 0.052 0.070 0.048
3Q2020 Jul 30, 2020 2DBP-02 35456 WOODLAND LANE 0.061 0.065 0.037 0.040
2Q2020 Jun 15, 2020 2DBP-01 FORT CLATSOP 0.076 0.072 0.076 0.078
2Q2020 Jun 15, 2020 2DBP-02 35456 WOODLAND LANE 0.058 0.059 0.040 0.037
1Q2020 Mar 23, 2020 2DBP-01 FORT CLATSOP 0.078 0.069 0.076 0.074
1Q2020 Feb 11, 2020 2DBP-02 35456 WOODLAND LANE 0.055 0.056 0.045 0.054
4Q2019 Oct 14, 2019 2DBP-01 FORT CLATSOP 0.079 0.094 0.069 0.091
4Q2019 Oct 14, 2019 2DBP-02 35456 WOODLAND LANE 0.053 0.053 0.021 0.021
3Q2019 Jul 25, 2019 2DBP-01 FORT CLATSOP 0.074 0.075 0.058 0.054
2Q2019 Jun 17, 2019 2DBP-01 FORT CLATSOP 0.061 0.073 0.048 0.061
1Q2019 Mar 13, 2019 2DBP-01 FORT CLATSOP 0.050 0.052 0.035 0.039
4Q2018 Oct 15, 2018 2DBP-01 FORT CLATSOP 0.054 0.059 0.039 0.046
3Q2018 Jul 06, 2018 2DBP-01 FORT CLATSOP 0.040 0.041 0.024 0.024
2Q2018 May 10, 2018 2DBP-01 FORT CLATSOP 0.041 0.042 0.025 0.024
1Q2018 Jan 18, 2018 2DBP-01 FORT CLATSOP 0.042 0.048 0.027 0.033
4Q2017 Dec 14, 2017 2DBP-01 FORT CLATSOP 0.034 0.033 0.020 0.019
3Q2017 Jul 25, 2017 2DBP-01 FORT CLATSOP 0.037 0.036 0.014 0.020
2Q2017 Jun 19, 2017 2DBP-01 FORT CLATSOP 0.045 0.038 0.021 0.015
1Q2017 2DBP-01 FORT CLATSOP 0.047 0.022
4Q2016 Dec 27, 2016 2DBP-01 FORT CLATSOP 0.045 0.045 0.024 0.022
3Q2016 Aug 03, 2016 2DBP-01 FORT CLATSOP 0.046 0.050 0.030 0.034
2Q2016 Apr 19, 2016 2DBP-01 FORT CLATSOP 0.050 0.042 0.030 0.028
1Q2016 Mar 17, 2016 2DBP-01 FORT CLATSOP 0.053 0.050 0.031 0.030
4Q2015 Dec 29, 2015 2DBP-01 FORT CLATSOP 0.052 0.053 0.030 0.030
3Q2015 Sep 08, 2015 2DBP-01 FORT CLATSOP 0.061 0.061 0.038 0.033
2Q2015 May 11, 2015 2DBP-01 FORT CLATSOP 0.063 0.055 0.044 0.037
1Q2015 Jan 15, 2015 2DBP-01 FORT CLATSOP 0.061 0.060 0.045 0.042
4Q2014 Nov 12, 2014 2DBP-01 FORT CLATSOP 0.070 0.070 0.054 0.053
3Q2014 Jul 23, 2014 2DBP-01 FORT CLATSOP 0.059 0.071 0.045 0.055
2Q2014 Apr 24, 2014 2DBP-01 FORT CLATSOP 0.039 0.050 0.029 0.039
1Q2014 Feb 24, 2014 2DBP-01 FORT CLATSOP 0.028 0.020
4Q2013 Oct 29, 2013 2DBP-01 FORT CLATSOP 0.008 0.005



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