OHA Drinking Water Services
OR41
PWS ID: 00869 ---- THE DALLES, 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
1Q2024 Mar 04, 2024 2DBP-01 E-1: E. 12TH AND SHEARER STS 0.024 0.025 0.019 0.019
1Q2024 Mar 04, 2024 2DBP-02 G-6: E. 8TH AND CASE STS 0.022 0.023 0.018 0.019
1Q2024 Mar 04, 2024 2DBP-03 S-3: W. SCENIC AND LIBERTY WAY 0.020 0.021 0.016 0.015
1Q2024 Mar 04, 2024 2DBP-04 G-1: E. 2ND AND MONROE STS 0.022 0.022 0.007 0.008
4Q2023 Dec 05, 2023 2DBP-01 E-1: E. 12TH AND SHEARER STS 0.021 0.020 0.019 0.016
4Q2023 Dec 05, 2023 2DBP-02 G-6: E. 8TH AND CASE STS 0.017 0.016 0.015 0.015
4Q2023 Dec 05, 2023 2DBP-03 S-3: W. SCENIC AND LIBERTY WAY 0.016 0.015 0.014 0.014
4Q2023 Dec 05, 2023 2DBP-04 G-1: E. 2ND AND MONROE STS 0.020 0.021 0.009 0.006
3Q2023 Sep 06, 2023 2DBP-01 E-1: E. 12TH AND SHEARER STS 0.021 0.022 0.020 0.019
3Q2023 Sep 06, 2023 2DBP-02 G-6: E. 8TH AND CASE STS 0.018 0.019 0.015 0.016
3Q2023 Sep 06, 2023 2DBP-03 S-3: W. SCENIC AND LIBERTY WAY 0.016 0.018 0.014 0.014
3Q2023 Sep 06, 2023 2DBP-04 G-1: E. 2ND AND MONROE STS 0.018 0.019 0.011 0.008
2Q2023 Jun 07, 2023 2DBP-01 E-1: E. 12TH AND SHEARER STS 0.022 0.024 0.020 0.022
2Q2023 Jun 07, 2023 2DBP-02 G-6: E. 8TH AND CASE STS 0.016 0.020 0.013 0.017
2Q2023 Jun 07, 2023 2DBP-03 S-3: W. SCENIC AND LIBERTY WAY 0.016 0.018 0.014 0.015
2Q2023 Jun 07, 2023 2DBP-04 G-1: E. 2ND AND MONROE STS 0.018 0.022 0.012 0.013
1Q2023 Mar 02, 2023 2DBP-01 E-1: E. 12TH AND SHEARER STS 0.024 0.020 0.021 0.021
1Q2023 Mar 02, 2023 2DBP-02 G-6: E. 8TH AND CASE STS 0.016 0.013 0.012 0.011
1Q2023 Mar 02, 2023 2DBP-03 S-3: W. SCENIC AND LIBERTY WAY 0.017 0.014 0.013 0.011
1Q2023 Mar 02, 2023 2DBP-04 G-1: E. 2ND AND MONROE STS 0.020 0.015 0.014 0.014
4Q2022 Dec 06, 2022 2DBP-01 E-1: E. 12TH AND SHEARER STS 0.028 0.023 0.021 0.019
4Q2022 Dec 06, 2022 2DBP-02 G-6: E. 8TH AND CASE STS 0.020 0.016 0.013 0.012
4Q2022 Dec 06, 2022 2DBP-03 S-3: W. SCENIC AND LIBERTY WAY 0.020 0.016 0.014 0.013
4Q2022 Dec 06, 2022 2DBP-04 G-1: E. 2ND AND MONROE STS 0.023 0.020 0.015 0.014
3Q2022 Sep 01, 2022 2DBP-01 E-1: E. 12TH AND SHEARER STS 0.030 0.029 0.021 0.019
3Q2022 Sep 01, 2022 2DBP-02 G-6: E. 8TH AND CASE STS 0.022 0.021 0.014 0.012
3Q2022 Sep 01, 2022 2DBP-03 S-3: W. SCENIC AND LIBERTY WAY 0.021 0.022 0.014 0.014
3Q2022 Sep 01, 2022 2DBP-04 G-1: E. 2ND AND MONROE STS 0.025 0.024 0.015 0.013
2Q2022 Jun 02, 2022 2DBP-01 E-1: E. 12TH AND SHEARER STS 0.028 0.034 0.020 0.024
2Q2022 Jun 02, 2022 2DBP-02 G-6: E. 8TH AND CASE STS 0.021 0.025 0.013 0.016
2Q2022 Jun 02, 2022 2DBP-03 S-3: W. SCENIC AND LIBERTY WAY 0.019 0.022 0.013 0.014
2Q2022 Jun 02, 2022 2DBP-04 G-1: E. 2ND AND MONROE STS 0.025 0.030 0.013 0.018
1Q2022 Mar 02, 2022 2DBP-01 E-1: E. 12TH AND SHEARER STS 0.022 0.028 0.018 0.020
1Q2022 Mar 02, 2022 2DBP-02 G-6: E. 8TH AND CASE STS 0.018 0.021 0.012 0.013
1Q2022 Mar 02, 2022 2DBP-03 S-3: W. SCENIC AND LIBERTY WAY 0.017 0.020 0.012 0.012
1Q2022 Mar 02, 2022 2DBP-04 G-1: E. 2ND AND MONROE STS 0.022 0.023 0.013 0.013
4Q2021 Dec 01, 2021 2DBP-01 E-1: E. 12TH AND SHEARER STS 0.021 0.019 0.018 0.017
4Q2021 Dec 01, 2021 2DBP-02 G-6: E. 8TH AND CASE STS 0.018 0.015 0.014 0.011
4Q2021 Dec 01, 2021 2DBP-03 S-3: W. SCENIC AND LIBERTY WAY 0.017 0.014 0.014 0.011
4Q2021 Dec 01, 2021 2DBP-04 G-1: E. 2ND AND MONROE STS 0.023 0.020 0.015 0.012
3Q2021 Sep 30, 2021 2DBP-01 E-1: E. 12TH AND SHEARER STS 0.020 0.019 0.017 0.015
3Q2021 Sep 30, 2021 2DBP-02 G-6: E. 8TH AND CASE STS 0.018 0.017 0.015 0.012
3Q2021 Sep 30, 2021 2DBP-03 S-3: W. SCENIC AND LIBERTY WAY 0.017 0.017 0.016 0.014
3Q2021 Sep 30, 2021 2DBP-04 G-1: E. 2ND AND MONROE STS 0.024 0.021 0.016 0.012
2Q2021 Jun 09, 2021 2DBP-01 E-1: E. 12TH AND SHEARER STS 0.020 0.020 0.018 0.018
2Q2021 Jun 09, 2021 2DBP-02 G-6: E. 8TH AND CASE STS 0.021 0.020 0.017 0.017
2Q2021 Jun 09, 2021 2DBP-03 S-3: W. SCENIC AND LIBERTY WAY 0.018 0.018 0.016 0.017
2Q2021 Jun 09, 2021 2DBP-04 G-1: E. 2ND AND MONROE STS 0.025 0.027 0.018 0.020
1Q2021 Mar 02, 2021 2DBP-01 E-1: E. 12TH AND SHEARER STS 0.021 0.024 0.018 0.021
1Q2021 Mar 02, 2021 2DBP-02 G-6: E. 8TH AND CASE STS 0.021 0.025 0.018 0.020
1Q2021 Mar 02, 2021 2DBP-03 S-3: W. SCENIC AND LIBERTY WAY 0.018 0.021 0.017 0.019
1Q2021 Mar 02, 2021 2DBP-04 G-1: E. 2ND AND MONROE STS 0.025 0.026 0.019 0.019
4Q2020 Dec 02, 2020 2DBP-01 E-1: E. 12TH AND SHEARER STS 0.017 0.017 0.016 0.017
4Q2020 Dec 02, 2020 2DBP-02 G-6: E. 8TH AND CASE STS 0.018 0.017 0.016 0.016
4Q2020 Dec 02, 2020 2DBP-03 S-3: W. SCENIC AND LIBERTY WAY 0.015 0.015 0.014 0.015
4Q2020 Dec 02, 2020 2DBP-04 G-1: E. 2ND AND MONROE STS 0.023 0.024 0.017 0.017
3Q2020 Sep 02, 2020 2DBP-01 E-1: E. 12TH AND SHEARER STS 0.018 0.017 0.017 0.015
3Q2020 Sep 02, 2020 2DBP-02 G-6: E. 8TH AND CASE STS 0.017 0.018 0.014 0.016
3Q2020 Sep 02, 2020 2DBP-03 S-3: W. SCENIC AND LIBERTY WAY 0.014 0.015 0.012 0.013
3Q2020 Sep 02, 2020 2DBP-04 G-1: E. 2ND AND MONROE STS 0.020 0.020 0.015 0.014
2Q2020 Jun 09, 2020 2DBP-01 E-1: E. 12TH AND SHEARER STS 0.018 0.018 0.017 0.018
2Q2020 Jun 09, 2020 2DBP-02 G-6: E. 8TH AND CASE STS 0.017 0.016 0.014 0.014
2Q2020 Jun 09, 2020 2DBP-03 S-3: W. SCENIC AND LIBERTY WAY 0.014 0.014 0.012 0.013
2Q2020 Jun 09, 2020 2DBP-04 G-1: E. 2ND AND MONROE STS 0.023 0.023 0.015 0.019
1Q2020 Mar 04, 2020 2DBP-01 E-1: E. 12TH AND SHEARER STS 0.023 0.018 0.019 0.017
1Q2020 Mar 04, 2020 2DBP-02 G-6: E. 8TH AND CASE STS 0.017 0.018 0.013 0.015
1Q2020 Mar 04, 2020 2DBP-03 S-3: W. SCENIC AND LIBERTY WAY 0.017 0.014 0.013 0.011
1Q2020 Mar 04, 2020 2DBP-04 G-1: E. 2ND AND MONROE STS 0.026 0.022 0.014 0.014
4Q2019 Dec 03, 2019 2DBP-01 E-1: E. 12TH AND SHEARER STS 0.023 0.024 0.019 0.021
4Q2019 Dec 03, 2019 2DBP-02 G-6: E. 8TH AND CASE STS 0.016 0.015 0.012 0.011
4Q2019 Dec 03, 2019 2DBP-03 S-3: W. SCENIC AND LIBERTY WAY 0.017 0.015 0.013 0.011
4Q2019 Dec 03, 2019 2DBP-04 G-1: E. 2ND AND MONROE STS 0.025 0.025 0.014 0.012
3Q2019 Sep 04, 2019 2DBP-01 E-1: E. 12TH AND SHEARER STS 0.022 0.022 0.018 0.017
3Q2019 Sep 04, 2019 2DBP-02 G-6: E. 8TH AND CASE STS 0.016 0.018 0.013 0.014
3Q2019 Sep 04, 2019 2DBP-03 S-3: W. SCENIC AND LIBERTY WAY 0.017 0.018 0.014 0.014
3Q2019 Sep 04, 2019 2DBP-04 G-1: E. 2ND AND MONROE STS 0.024 0.028 0.014 0.013
2Q2019 Jun 06, 2019 2DBP-01 E-1: E. 12TH AND SHEARER STS 0.023 0.027 0.019 0.021
2Q2019 Jun 06, 2019 2DBP-02 G-6: E. 8TH AND CASE STS 0.014 0.015 0.011 0.012
2Q2019 Jun 06, 2019 2DBP-03 S-3: W. SCENIC AND LIBERTY WAY 0.018 0.020 0.015 0.017
2Q2019 Jun 06, 2019 2DBP-04 G-1: E. 2ND AND MONROE STS 0.022 0.028 0.014 0.017
1Q2019 Mar 11, 2019 2DBP-01 E-1: E. 12TH AND SHEARER STS 0.022 0.018 0.019 0.017
1Q2019 Mar 11, 2019 2DBP-02 G-6: E. 8TH AND CASE STS 0.017 0.015 0.014 0.013
1Q2019 Mar 11, 2019 2DBP-03 S-3: W. SCENIC AND LIBERTY WAY 0.018 0.015 0.015 0.014
1Q2019 Mar 11, 2019 2DBP-04 G-1: E. 2ND AND MONROE STS 0.020 0.017 0.014 0.013
4Q2018 Dec 04, 2018 2DBP-01 E-1: E. 12TH AND SHEARER STS 0.025 0.021 0.022 0.018
4Q2018 Dec 04, 2018 2DBP-02 G-6: E. 8TH AND CASE STS 0.020 0.016 0.016 0.013
4Q2018 Dec 04, 2018 2DBP-03 S-3: W. SCENIC AND LIBERTY WAY 0.020 0.017 0.017 0.014
4Q2018 Dec 04, 2018 2DBP-04 G-1: E. 2ND AND MONROE STS 0.023 0.019 0.016 0.013
3Q2018 Sep 06, 2018 2DBP-01 E-1: E. 12TH AND SHEARER STS 0.028 0.026 0.025 0.023
3Q2018 Sep 06, 2018 2DBP-02 G-6: E. 8TH AND CASE STS 0.023 0.020 0.019 0.015
3Q2018 Sep 06, 2018 2DBP-03 S-3: W. SCENIC AND LIBERTY WAY 0.022 0.022 0.019 0.019
3Q2018 Sep 06, 2018 2DBP-04 G-1: E. 2ND AND MONROE STS 0.026 0.025 0.019 0.014
2Q2018 Jun 07, 2018 2DBP-01 E-1: E. 12TH AND SHEARER STS 0.027 0.032 0.024 0.026
2Q2018 Jun 07, 2018 2DBP-02 G-6: E. 8TH AND CASE STS 0.025 0.027 0.021 0.022
2Q2018 Jun 07, 2018 2DBP-03 S-3: W. SCENIC AND LIBERTY WAY 0.022 0.025 0.018 0.020
2Q2018 Jun 07, 2018 2DBP-04 G-1: E. 2ND AND MONROE STS 0.026 0.030 0.021 0.022
1Q2018 Mar 07, 2018 2DBP-01 E-1: E. 12TH AND SHEARER STS 0.027 0.025 0.024 0.025
1Q2018 Mar 07, 2018 2DBP-02 G-6: E. 8TH AND CASE STS 0.024 0.026 0.020 0.023
1Q2018 Mar 07, 2018 2DBP-03 S-3: W. SCENIC AND LIBERTY WAY 0.021 0.022 0.018 0.019
1Q2018 Mar 07, 2018 2DBP-04 G-1: E. 2ND AND MONROE STS 0.025 0.026 0.021 0.023
4Q2017 Dec 06, 2017 2DBP-01 E-1: E. 12TH AND SHEARER STS 0.027 0.027 0.021 0.023
4Q2017 Dec 06, 2017 2DBP-02 G-6: E. 8TH AND CASE STS 0.023 0.023 0.019 0.019
4Q2017 Dec 06, 2017 2DBP-03 S-3: W. SCENIC AND LIBERTY WAY 0.022 0.020 0.016 0.016
4Q2017 Dec 06, 2017 2DBP-04 G-1: E. 2ND AND MONROE STS 0.024 0.024 0.019 0.020
3Q2017 Sep 06, 2017 2DBP-01 E-1: E. 12TH AND SHEARER STS 0.024 0.024 0.018 0.018
3Q2017 Sep 06, 2017 2DBP-02 G-6: E. 8TH AND CASE STS 0.021 0.022 0.016 0.017
3Q2017 Sep 06, 2017 2DBP-03 S-3: W. SCENIC AND LIBERTY WAY 0.021 0.022 0.014 0.014
3Q2017 Sep 06, 2017 2DBP-04 G-1: E. 2ND AND MONROE STS 0.022 0.023 0.017 0.018
2Q2017 Jun 07, 2017 2DBP-01 E-1: E. 12TH AND SHEARER STS 0.024 0.029 0.018 0.020
2Q2017 Jun 07, 2017 2DBP-02 G-6: E. 8TH AND CASE STS 0.020 0.022 0.015 0.016
2Q2017 Jun 07, 2017 2DBP-03 S-3: W. SCENIC AND LIBERTY WAY 0.021 0.023 0.014 0.015
2Q2017 Jun 07, 2017 2DBP-04 G-1: E. 2ND AND MONROE STS 0.019 0.025 0.013 0.018
1Q2017 Mar 02, 2017 2DBP-01 E-1: E. 12TH AND SHEARER STS 0.023 0.023 0.019 0.017
1Q2017 Mar 02, 2017 2DBP-02 G-6: E. 8TH AND CASE STS 0.019 0.020 0.015 0.016
1Q2017 Mar 02, 2017 2DBP-03 S-3: W. SCENIC AND LIBERTY WAY 0.019 0.022 0.014 0.014
1Q2017 Mar 02, 2017 2DBP-04 G-1: E. 2ND AND MONROE STS 0.017 0.018 0.013 0.013
4Q2016 Dec 01, 2016 2DBP-01 E-1: E. 12TH AND SHEARER STS 0.022 0.020 0.021 0.018
4Q2016 Dec 01, 2016 2DBP-02 G-6: E. 8TH AND CASE STS 0.019 0.017 0.016 0.014
4Q2016 Dec 01, 2016 2DBP-03 S-3: W. SCENIC AND LIBERTY WAY 0.017 0.016 0.014 0.013
4Q2016 Dec 01, 2016 2DBP-04 G-1: E. 2ND AND MONROE STS 0.018 0.015 0.013 0.012
3Q2016 Sep 01, 2016 2DBP-01 E-1: E. 12TH AND SHEARER STS 0.023 0.022 0.021 0.021
3Q2016 Sep 01, 2016 2DBP-02 G-6: E. 8TH AND CASE STS 0.019 0.019 0.017 0.016
3Q2016 Sep 01, 2016 2DBP-03 S-3: W. SCENIC AND LIBERTY WAY 0.017 0.018 0.014 0.014
3Q2016 Sep 01, 2016 2DBP-04 G-1: E. 2ND AND MONROE STS 0.019 0.016 0.014 0.013
2Q2016 Jun 01, 2016 2DBP-01 E-1: E. 12TH AND SHEARER STS 0.024 0.026 0.022 0.024
2Q2016 Jun 01, 2016 2DBP-02 G-6: E. 8TH AND CASE STS 0.020 0.020 0.017 0.018
2Q2016 Jun 01, 2016 2DBP-03 S-3: W. SCENIC AND LIBERTY WAY 0.018 0.017 0.015 0.015
2Q2016 Jun 01, 2016 2DBP-04 G-1: E. 2ND AND MONROE STS 0.021 0.022 0.015 0.019
1Q2016 Mar 08, 2016 2DBP-01 E-1: E. 12TH AND SHEARER STS 0.021 0.024 0.020 0.023
1Q2016 Mar 08, 2016 2DBP-02 G-6: E. 8TH AND CASE STS 0.017 0.021 0.014 0.018
1Q2016 Mar 08, 2016 2DBP-03 S-3: W. SCENIC AND LIBERTY WAY 0.018 0.019 0.015 0.015
1Q2016 Mar 08, 2016 2DBP-04 G-1: E. 2ND AND MONROE STS 0.020 0.023 0.016 0.016
4Q2015 Dec 01, 2015 2DBP-01 E-1: E. 12TH AND SHEARER STS 0.021 0.019 0.020 0.016
4Q2015 Dec 01, 2015 2DBP-02 G-6: E. 8TH AND CASE STS 0.016 0.016 0.015 0.013
4Q2015 Dec 01, 2015 2DBP-03 S-3: W. SCENIC AND LIBERTY WAY 0.017 0.016 0.016 0.014
4Q2015 Dec 01, 2015 2DBP-04 G-1: E. 2ND AND MONROE STS 0.017 0.017 0.016 0.015
3Q2015 Sep 01, 2015 2DBP-01 E-1: E. 12TH AND SHEARER STS 0.020 0.022 0.021 0.020
3Q2015 Sep 01, 2015 2DBP-02 G-6: E. 8TH AND CASE STS 0.015 0.017 0.016 0.014
3Q2015 Sep 01, 2015 2DBP-03 S-3: W. SCENIC AND LIBERTY WAY 0.017 0.019 0.018 0.017
3Q2015 Sep 01, 2015 2DBP-04 G-1: E. 2ND AND MONROE STS 0.017 0.016 0.016 0.013
2Q2015 Jun 03, 2015 2DBP-01 E-1: E. 12TH AND SHEARER STS 0.020 0.019 0.023 0.022
2Q2015 Jun 03, 2015 2DBP-02 G-6: E. 8TH AND CASE STS 0.013 0.012 0.016 0.014
2Q2015 Jun 03, 2015 2DBP-03 S-3: W. SCENIC AND LIBERTY WAY 0.015 0.015 0.019 0.019
2Q2015 Jun 03, 2015 2DBP-04 G-1: E. 2ND AND MONROE STS 0.017 0.018 0.020 0.021
1Q2015 Mar 04, 2015 2DBP-01 E-1: E. 12TH AND SHEARER STS 0.022 0.023 0.025 0.026
1Q2015 Mar 04, 2015 2DBP-02 G-6: E. 8TH AND CASE STS 0.014 0.016 0.018 0.021
1Q2015 Mar 04, 2015 2DBP-03 S-3: W. SCENIC AND LIBERTY WAY 0.014 0.016 0.018 0.020
1Q2015 Mar 04, 2015 2DBP-04 G-1: E. 2ND AND MONROE STS 0.016 0.018 0.019 0.020
4Q2014 Dec 11, 2014 2DBP-01 E-1: E. 12TH AND SHEARER STS 0.020 0.019 0.025 0.023
4Q2014 Dec 11, 2014 2DBP-02 G-6: E. 8TH AND CASE STS 0.015 0.014 0.018 0.018
4Q2014 Dec 11, 2014 2DBP-03 S-3: W. SCENIC AND LIBERTY WAY 0.014 0.013 0.018 0.017
4Q2014 Dec 11, 2014 2DBP-04 G-1: E. 2ND AND MONROE STS 0.018 0.016 0.020 0.018
3Q2014 Sep 03, 2014 2DBP-01 E-1: E. 12TH AND SHEARER STS 0.020 0.022 0.026 0.025
3Q2014 Sep 03, 2014 2DBP-02 G-6: E. 8TH AND CASE STS 0.014 0.014 0.019 0.017
3Q2014 Sep 03, 2014 2DBP-03 S-3: W. SCENIC AND LIBERTY WAY 0.013 0.014 0.018 0.018
3Q2014 Sep 03, 2014 2DBP-04 G-1: E. 2ND AND MONROE STS 0.018 0.017 0.021 0.019
2Q2014 Jun 17, 2014 2DBP-01 E-1: E. 12TH AND SHEARER STS 0.015 0.020 0.020 0.027
2Q2014 Jun 17, 2014 2DBP-02 G-6: E. 8TH AND CASE STS 0.011 0.014 0.015 0.019
2Q2014 Jun 17, 2014 2DBP-03 S-3: W. SCENIC AND LIBERTY WAY 0.010 0.013 0.014 0.018
2Q2014 Jun 17, 2014 2DBP-04 G-1: E. 2ND AND MONROE STS 0.014 0.018 0.016 0.020
1Q2014 Mar 06, 2014 2DBP-01 E-1: E. 12TH AND SHEARER STS 0.010 0.014
1Q2014 Mar 06, 2014 2DBP-02 G-6: E. 8TH AND CASE STS 0.008 0.012
1Q2014 Mar 06, 2014 2DBP-03 S-3: W. SCENIC AND LIBERTY WAY 0.007 0.010
1Q2014 Mar 06, 2014 2DBP-04 G-1: E. 2ND AND MONROE STS 0.011 0.012
4Q2013 Dec 02, 2013 2DBP-01 E-1: E. 12TH AND SHEARER STS 0.004 0.007
4Q2013 Dec 02, 2013 2DBP-02 G-6: E. 8TH AND CASE STS 0.003 0.006
4Q2013 Dec 02, 2013 2DBP-03 S-3: W. SCENIC AND LIBERTY WAY 0.003 0.005
4Q2013 Dec 02, 2013 2DBP-04 G-1: E. 2ND AND MONROE STS 0.004 0.006
3Q2012 2DBP-02 G-6: E. 8TH AND CASE STS
2Q2012 2DBP-02 G-6: E. 8TH AND CASE STS
1Q2012 2DBP-02 G-6: E. 8TH AND CASE STS
4Q2011 2DBP-02 G-6: E. 8TH AND CASE STS




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