OHA Drinking Water Services
OR41
PWS ID: 00260 ---- DRAIN, 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
3Q2024 Aug 13, 2024 2DBP-01 503 N MAIN (TTHM) 0.035 0.035
3Q2024 Aug 13, 2024 2DBP-02 205 W A AVE (HAA5 SM #1) 0.023 0.026
2Q2024 May 07, 2024 2DBP-01 503 N MAIN (TTHM) 0.035 0.031
2Q2024 May 07, 2024 2DBP-02 205 W A AVE (HAA5 SM #1) 0.021 0.023
1Q2024 Feb 29, 2024 2DBP-01 503 N MAIN (TTHM) 0.036 0.035
1Q2024 Feb 29, 2024 2DBP-02 205 W A AVE (HAA5 SM #1) 0.019 0.021
4Q2023 Nov 07, 2023 2DBP-01 503 N MAIN (TTHM) 0.035 0.040
4Q2023 Nov 07, 2023 2DBP-02 205 W A AVE (HAA5 SM #1) 0.021 0.017
3Q2023 Aug 29, 2023 2DBP-01 503 N MAIN (TTHM) 0.028 0.035
3Q2023 Aug 29, 2023 2DBP-02 205 W A AVE (HAA5 SM #1) 0.020 0.022
2Q2023 May 16, 2023 2DBP-01 503 N MAIN (TTHM) 0.027 0.025
2Q2023 May 16, 2023 2DBP-02 205 W A AVE (HAA5 SM #1) 0.040 0.019
1Q2023 Feb 28, 2023 2DBP-01 503 N MAIN (TTHM) 0.032 0.025
1Q2023 Feb 28, 2023 2DBP-02 205 W A AVE (HAA5 SM #1) 0.045 0.044
4Q2022 Nov 01, 2022 2DBP-01 503 N MAIN (TTHM) 0.032 0.031
4Q2022 Nov 01, 2022 2DBP-02 205 W A AVE (HAA5 SM #1) 0.044 0.039
3Q2022 Aug 16, 2022 2DBP-01 503 N MAIN (TTHM) 0.037 0.037
3Q2022 Aug 16, 2022 2DBP-02 205 W A AVE (HAA5 SM #1) 0.052 0.067
2Q2022 Jun 07, 2022 2DBP-01 503 N MAIN (TTHM) 0.037 0.041
2Q2022 Jun 07, 2022 2DBP-02 205 W A AVE (HAA5 SM #1) 0.035 0.034
1Q2022 Feb 08, 2022 2DBP-01 503 N MAIN (TTHM) 0.036 0.027
1Q2022 Feb 08, 2022 2DBP-02 205 W A AVE (HAA5 SM #1) 0.034 0.034
4Q2021 Nov 09, 2021 2DBP-01 503 N MAIN (TTHM) 0.039 0.041
4Q2021 Nov 09, 2021 2DBP-02 205 W A AVE (HAA5 SM #1) 0.033 0.037
3Q2021 2DBP-01 503 N MAIN (TTHM) 0.041
3Q2021 2DBP-02 205 W A AVE (HAA5 SM #1) 0.023
2Q2021 May 04, 2021 2DBP-01 503 N MAIN (TTHM) 0.046 0.042
2Q2021 May 04, 2021 2DBP-02 205 W A AVE (HAA5 SM #1) 0.025 0.028
1Q2021 Feb 04, 2021 2DBP-01 503 N MAIN (TTHM) 0.045 0.041
1Q2021 Feb 04, 2021 2DBP-02 205 W A AVE (HAA5 SM #1) 0.022 0.023
4Q2020 Dec 23, 2020 2DBP-01 503 N MAIN (TTHM) 0.046 0.047
4Q2020 Dec 23, 2020 2DBP-02 205 W A AVE (HAA5 SM #1) 0.020 0.021
3Q2020 Aug 06, 2020 2DBP-01 503 N MAIN (TTHM) 0.049 0.052
3Q2020 Aug 06, 2020 2DBP-02 205 W A AVE (HAA5 SM #1) 0.019 0.019
2Q2020 May 21, 2020 2DBP-01 503 N MAIN (TTHM) 0.061 0.044
2Q2020 May 21, 2020 2DBP-02 205 W A AVE (HAA5 SM #1) 0.021 0.019
1Q2020 Feb 06, 2020 2DBP-01 503 N MAIN (TTHM) 0.062 0.059
1Q2020 Feb 06, 2020 2DBP-02 205 W A AVE (HAA5 SM #1) 0.021 0.021
4Q2019 Nov 21, 2019 2DBP-01 503 N MAIN (TTHM) 0.059 0.066
4Q2019 Nov 21, 2019 2DBP-02 205 W A AVE (HAA5 SM #1) 0.019 0.020
3Q2019 Aug 15, 2019 2DBP-01 503 N MAIN (TTHM) 0.056 0.074
3Q2019 Aug 15, 2019 2DBP-02 205 W A AVE (HAA5 SM #1) 0.018 0.022
2Q2019 May 02, 2019 2DBP-01 503 N MAIN (TTHM) 0.045 0.040
2Q2019 May 02, 2019 2DBP-02 205 W A AVE (HAA5 SM #1) 0.015 0.017
1Q2019 Feb 15, 2019 2DBP-01 503 N MAIN (TTHM) 0.041 0.038
1Q2019 Feb 15, 2019 2DBP-02 205 W A AVE (HAA5 SM #1) 0.014 0.012
4Q2018 Nov 01, 2018 2DBP-01 503 N MAIN (TTHM) 0.042 0.047
4Q2018 Nov 01, 2018 2DBP-02 205 W A AVE (HAA5 SM #1) 0.015 0.015
3Q2018 Aug 16, 2018 2DBP-01 503 N MAIN (TTHM) 0.039 0.048
3Q2018 Aug 16, 2018 2DBP-02 205 W A AVE (HAA5 SM #1) 0.016 0.015
2Q2018 May 10, 2018 2DBP-01 503 N MAIN (TTHM) 0.032 0.030
2Q2018 May 10, 2018 2DBP-02 205 W A AVE (HAA5 SM #1) 0.016 0.017
1Q2018 Feb 01, 2018 2DBP-01 503 N MAIN (TTHM) 0.028 0.030
1Q2018 Feb 01, 2018 2DBP-02 205 W A AVE (HAA5 SM #1) 0.015 0.015
4Q2017 Dec 01, 2017 2DBP-01 503 N MAIN (TTHM) 0.028 0.030
4Q2017 Dec 01, 2017 2DBP-02 205 W A AVE (HAA5 SM #1) 0.014 0.016
3Q2017 Aug 03, 2017 2DBP-01 503 N MAIN (TTHM) 0.027 0.031
3Q2017 Aug 03, 2017 2DBP-02 205 W A AVE (HAA5 SM #1) 0.013 0.014
2Q2017 May 04, 2017 2DBP-01 503 N MAIN (TTHM) 0.037 0.021
2Q2017 May 31, 2017 2DBP-02 205 W A AVE (HAA5 SM #1) 0.015 0.013
1Q2017 Feb 08, 2017 2DBP-01 503 N MAIN (TTHM) 0.043 0.038
1Q2017 Feb 08, 2017 2DBP-02 205 W A AVE (HAA5 SM #1) 0.018 0.014
4Q2016 Nov 03, 2016 2DBP-01 503 N MAIN (TTHM) 0.044 0.045
4Q2016 Nov 03, 2016 2DBP-02 205 W A AVE (HAA5 SM #1) 0.020 0.019
3Q2016 Aug 18, 2016 2DBP-01 503 N MAIN (TTHM) 0.050 0.058
3Q2016 Aug 18, 2016 2DBP-02 205 W A AVE (HAA5 SM #1) 0.021 0.022
2Q2016 May 19, 2016 2DBP-01 503 N MAIN (TTHM) 0.045 0.039
2Q2016 May 19, 2016 2DBP-02 205 W A AVE (HAA5 SM #1) 0.025 0.022
1Q2016 Feb 04, 2016 2DBP-01 503 N MAIN (TTHM) 0.048 0.040
1Q2016 Feb 04, 2016 2DBP-02 205 W A AVE (HAA5 SM #1) 0.023 0.022
4Q2015 Nov 15, 2015 2DBP-01 503 N MAIN (TTHM) 0.047 0.054
4Q2015 Nov 05, 2015 2DBP-02 205 W A AVE (HAA5 SM #1) 0.022 0.023
3Q2015 Aug 06, 2015 2DBP-01 503 N MAIN (TTHM) 0.047 0.051
3Q2015 Aug 06, 2015 2DBP-02 205 W A AVE (HAA5 SM #1) 0.024 0.028
2Q2015 May 21, 2015 2DBP-01 503 N MAIN (TTHM) 0.054 0.044
2Q2015 May 21, 2015 2DBP-02 205 W A AVE (HAA5 SM #1) 0.021 0.020
1Q2015 Feb 12, 2015 2DBP-01 503 N MAIN (TTHM) 0.051 0.046
1Q2015 Feb 12, 2015 2DBP-02 205 W A AVE (HAA5 SM #1) 0.022 0.019
4Q2014 Nov 06, 2014 2DBP-01 503 N MAIN (TTHM) 0.056 0.058
4Q2014 Nov 06, 2014 2DBP-02 205 W A AVE (HAA5 SM #1) 0.026 0.024
3Q2014 Aug 07, 2014 2DBP-01 503 N MAIN (TTHM) 0.060 0.067
3Q2014 Aug 07, 2014 2DBP-02 205 W A AVE (HAA5 SM #1) 0.027 0.027
2Q2014 May 08, 2014 2DBP-01 503 N MAIN (TTHM) 0.036 0.046
2Q2014 May 08, 2014 2DBP-02 205 W A AVE (HAA5 SM #1) 0.020 0.026
1Q2014 Feb 13, 2014 2DBP-01 503 N MAIN (TTHM) 0.026
1Q2014 Feb 13, 2014 2DBP-02 205 W A AVE (HAA5 SM #1) 0.014
4Q2013 Nov 21, 2013 2DBP-01 503 N MAIN (TTHM) 0.016
4Q2013 Nov 21, 2013 2DBP-02 205 W A AVE (HAA5 SM #1) 0.007



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