OHA Drinking Water Services
OR41
PWS ID: 00673 ---- PRAIRIE CITY
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 Mar 06, 2024 2DBP-01 SM #2 - 14 ST 0.036 0.030
4Q2023 Dec 06, 2023 2DBP-01 SM #2 - 14 ST 0.034 0.034
3Q2023 Sep 13, 2023 2DBP-01 SM #2 - 14 ST 0.034 0.038
2Q2023 Jun 07, 2023 2DBP-01 SM #2 - 14 ST 0.037 0.037
1Q2023 Mar 01, 2023 2DBP-01 SM #2 - 14 ST 0.043 0.030
4Q2022 Dec 07, 2022 2DBP-01 SM #2 - 14 ST 0.043 0.043
3Q2022 Sep 07, 2022 2DBP-01 SM #2 - 14 ST 0.046 0.049
2Q2022 Jun 01, 2022 2DBP-01 SM #2 - 14 ST 0.038 0.052
1Q2022 Mar 08, 2022 2DBP-01 SM #2 - 14 ST 0.030 0.026
4Q2021 Dec 01, 2021 2DBP-01 SM #2 - 14 ST 0.029 0.033
3Q2021 Sep 01, 2021 2DBP-01 SM #2 - 14 ST 0.024 0.025
2Q2021 Jun 02, 2021 2DBP-01 SM #2 - 14 ST 0.025 0.030
1Q2021 Mar 03, 2021 2DBP-01 SM #2 - 14 ST 0.033 0.020
4Q2020 Dec 02, 2020 2DBP-01 SM #2 - 14 ST 0.035 0.032
3Q2020 Sep 02, 2020 2DBP-01 SM #2 - 14 ST 0.038 0.038
2Q2020 Jun 03, 2020 2DBP-01 SM #2 - 14 ST 0.042 0.050
1Q2020 Mar 04, 2020 2DBP-01 SM #2 - 14 ST 0.043 0.031
4Q2019 Dec 09, 2019 2DBP-01 SM #2 - 14 ST 0.043 0.042
3Q2019 Sep 04, 2019 2DBP-01 SM #2 - 14 ST 0.045 0.046
2Q2019 Jun 05, 2019 2DBP-01 SM #2 - 14 ST 0.041 0.054
1Q2019 Mar 13, 2019 2DBP-01 SM #2 - 14 ST 0.038 0.030
4Q2018 Nov 07, 2018 2DBP-01 SM #2 - 14 ST 0.040 0.038
3Q2018 Sep 05, 2018 2DBP-01 SM #2 - 14 ST 0.032 0.036
2Q2018 Jun 06, 2018 2DBP-01 SM #2 - 14 ST 0.033 0.045
1Q2018 2DBP-01 SM #2 - 14 ST 0.029
4Q2017 Dec 13, 2017 2DBP-01 SM #2 - 14 ST 0.032 0.025
3Q2017 Sep 06, 2017 2DBP-01 SM #2 - 14 ST 0.033 0.035
2Q2017 Jun 07, 2017 2DBP-01 SM #2 - 14 ST 0.029 0.039
1Q2017 Mar 01, 2017 2DBP-01 SM #2 - 14 ST 0.027 0.027
4Q2016 Dec 05, 2016 2DBP-01 SM #2 - 14 ST 0.033 0.020
3Q2016 Sep 07, 2016 2DBP-01 SM #2 - 14 ST 0.035 0.033
2Q2016 Jun 06, 2016 2DBP-01 SM #2 - 14 ST 0.041 0.042
1Q2016 Mar 02, 2016 2DBP-01 SM #2 - 14 ST 0.051 0.048
4Q2015 Dec 02, 2015 2DBP-01 SM #2 - 14 ST 0.042 0.040 0.045
3Q2015 Sep 22, 2015 2DBP-01 SM #2 - 14 ST 0.041 0.045 0.045
2Q2015 Jun 01, 2015 2DBP-01 SM #2 - 14 ST 0.037 0.052 0.045
1Q2015 Mar 03, 2015 2DBP-01 SM #2 - 14 ST 0.040 0.024 0.045 0.045
4Q2014 Dec 02, 2014 2DBP-01 SM #2 - 14 ST 0.047 0.038
3Q2014 Sep 09, 2014 2DBP-01 SM #2 - 14 ST 0.056 0.047
2Q2014 Jun 10, 2014 2DBP-01 SM #2 - 14 ST 0.050 0.080
1Q2014 Mar 04, 2014 2DBP-01 SM #2 - 14 ST 0.020
4Q2013 2DBP-01 SM #2 - 14 ST
1Q2024 Mar 06, 2024 2DBP-02 STAGE 1 #1 - PW OFFICE 0.024 0.016
4Q2023 Dec 06, 2023 2DBP-02 STAGE 1 #1 - PW OFFICE 0.024 0.023
3Q2023 Sep 13, 2023 2DBP-02 STAGE 1 #1 - PW OFFICE 0.026 0.025
2Q2023 Jun 07, 2023 2DBP-02 STAGE 1 #1 - PW OFFICE 0.026 0.034
1Q2023 Mar 01, 2023 2DBP-02 STAGE 1 #1 - PW OFFICE 0.025 0.018
4Q2022 Dec 07, 2022 2DBP-02 STAGE 1 #1 - PW OFFICE 0.024 0.026
3Q2022 Sep 07, 2022 2DBP-02 STAGE 1 #1 - PW OFFICE 0.025 0.024
2Q2022 Jun 01, 2022 2DBP-02 STAGE 1 #1 - PW OFFICE 0.021 0.032
1Q2022 Mar 08, 2022 2DBP-02 STAGE 1 #1 - PW OFFICE 0.017 0.012
4Q2021 Dec 01, 2021 2DBP-02 STAGE 1 #1 - PW OFFICE 0.019 0.019
3Q2021 Sep 01, 2021 2DBP-02 STAGE 1 #1 - PW OFFICE 0.015 0.015
2Q2021 Jun 02, 2021 2DBP-02 STAGE 1 #1 - PW OFFICE 0.017 0.022
1Q2021 Mar 03, 2021 2DBP-02 STAGE 1 #1 - PW OFFICE 0.023 0.014
4Q2020 Dec 02, 2020 2DBP-02 STAGE 1 #1 - PW OFFICE 0.023 0.019
3Q2020 Sep 02, 2020 2DBP-02 STAGE 1 #1 - PW OFFICE 0.026 0.026
2Q2020 Jun 03, 2020 2DBP-02 STAGE 1 #1 - PW OFFICE 0.028 0.036
1Q2020 Mar 04, 2020 2DBP-02 STAGE 1 #1 - PW OFFICE 0.023 0.019
4Q2019 Dec 09, 2019 2DBP-02 STAGE 1 #1 - PW OFFICE 0.023 0.023
3Q2019 Sep 04, 2019 2DBP-02 STAGE 1 #1 - PW OFFICE 0.029 0.024
2Q2019 Jun 05, 2019 2DBP-02 STAGE 1 #1 - PW OFFICE 0.026 0.033
1Q2019 Mar 13, 2019 2DBP-02 STAGE 1 #1 - PW OFFICE 0.030 0.020
4Q2018 Nov 07, 2018 2DBP-02 STAGE 1 #1 - PW OFFICE 0.034 0.035
3Q2018 Sep 05, 2018 2DBP-02 STAGE 1 #1 - PW OFFICE 0.025 0.025
2Q2018 Jun 06, 2018 2DBP-02 STAGE 1 #1 - PW OFFICE 0.027 0.042
1Q2018 2DBP-02 STAGE 1 #1 - PW OFFICE 0.022
4Q2017 Dec 13, 2017 2DBP-02 STAGE 1 #1 - PW OFFICE 0.027 0.019
3Q2017 Sep 06, 2017 2DBP-02 STAGE 1 #1 - PW OFFICE 0.027 0.028
2Q2017 Jun 07, 2017 2DBP-02 STAGE 1 #1 - PW OFFICE 0.024 0.034
1Q2017 Mar 01, 2017 2DBP-02 STAGE 1 #1 - PW OFFICE 0.021 0.023
4Q2016 Dec 05, 2016 2DBP-02 STAGE 1 #1 - PW OFFICE 0.023 0.013
3Q2016 Sep 07, 2016 2DBP-02 STAGE 1 #1 - PW OFFICE 0.027 0.021
2Q2016 Jun 06, 2016 2DBP-02 STAGE 1 #1 - PW OFFICE 0.031 0.034
1Q2016 Mar 02, 2016 2DBP-02 STAGE 1 #1 - PW OFFICE 0.039 0.035
4Q2015 Dec 02, 2015 2DBP-02 STAGE 1 #1 - PW OFFICE 0.037 0.034
3Q2015 Sep 22, 2015 2DBP-02 STAGE 1 #1 - PW OFFICE 0.037 0.036
2Q2015 Jun 01, 2015 2DBP-02 STAGE 1 #1 - PW OFFICE 0.030 0.051
1Q2015 2DBP-02 STAGE 1 #1 - PW OFFICE 0.040
4Q2014 Dec 02, 2014 2DBP-02 STAGE 1 #1 - PW OFFICE 0.043 0.037
3Q2014 Sep 09, 2014 2DBP-02 STAGE 1 #1 - PW OFFICE 0.018 0.039 0.048
2Q2014 Jun 10, 2014 2DBP-02 STAGE 1 #1 - PW OFFICE 0.009 0.039 0.063
1Q2014 Mar 04, 2014 2DBP-02 STAGE 1 #1 - PW OFFICE 0.006 0.016
4Q2013 Dec 03, 2013 2DBP-02 STAGE 1 #1 - PW OFFICE 0.004 0.003



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