OHA Drinking Water Services
OR41
PWS ID: 00057 ---- OLNEY-WALLUSKI WATER ASSN
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
4Q2024 Dec 19, 2024 2DBP-01 #1 MP-12 SAMPLE SITE 3 0.036 0.035 0.026 0.032
3Q2024 2DBP-01 #1 MP-12 SAMPLE SITE 3 0.037 0.025
2Q2024 Apr 03, 2024 2DBP-01 #1 MP-12 SAMPLE SITE 3 0.033 0.037 0.023 0.024
1Q2024 Jan 10, 2024 2DBP-01 #1 MP-12 SAMPLE SITE 3 0.028 0.033 0.020 0.023
4Q2023 Oct 11, 2023 2DBP-01 #1 MP-12 SAMPLE SITE 3 0.026 0.029 0.019 0.023
3Q2023 Jul 05, 2023 2DBP-01 #1 MP-12 SAMPLE SITE 3 0.024 0.022 0.016 0.015
2Q2023 Apr 19, 2023 2DBP-01 #1 MP-12 SAMPLE SITE 3 0.026 0.023 0.016 0.013
1Q2023 Jan 18, 2023 2DBP-01 #1 MP-12 SAMPLE SITE 3 0.029 0.029 0.021 0.018
4Q2022 Oct 19, 2022 2DBP-01 #1 MP-12 SAMPLE SITE 3 0.032 0.029 0.026 0.021
3Q2022 Jul 06, 2022 2DBP-01 #1 MP-12 SAMPLE SITE 3 0.037 0.033 0.033 0.025
2Q2022 Apr 06, 2022 2DBP-01 #1 MP-12 SAMPLE SITE 3 0.036 0.036 0.034 0.036
1Q2022 Jan 12, 2022 2DBP-01 #1 MP-12 SAMPLE SITE 3 0.033 0.040 0.029 0.037
4Q2021 Oct 06, 2021 2DBP-01 #1 MP-12 SAMPLE SITE 3 0.030 0.034 0.025 0.031
3Q2021 Jul 07, 2021 2DBP-01 #1 MP-12 SAMPLE SITE 3 0.031 0.026 0.024 0.018
2Q2021 Apr 07, 2021 2DBP-01 #1 MP-12 SAMPLE SITE 3 0.030 0.027 0.024 0.021
1Q2021 Jan 13, 2021 2DBP-01 #1 MP-12 SAMPLE SITE 3 0.030 0.034 0.024 0.028
4Q2020 Oct 14, 2020 2DBP-01 #1 MP-12 SAMPLE SITE 3 0.033 0.034 0.030 0.030
3Q2020 Jul 15, 2020 2DBP-01 #1 MP-12 SAMPLE SITE 3 0.030 0.028 0.027 0.024
2Q2020 Apr 15, 2020 2DBP-01 #1 MP-12 SAMPLE SITE 3 0.031 0.027 0.027 0.024
1Q2020 Jan 15, 2020 2DBP-01 #1 MP-12 SAMPLE SITE 3 0.038 0.039 0.037 0.037
4Q2019 Oct 23, 2019 2DBP-01 #1 MP-12 SAMPLE SITE 3 0.032 0.035 0.030 0.033
3Q2019 Jul 24, 2019 2DBP-01 #1 MP-12 SAMPLE SITE 3 0.035 0.031 0.036 0.028
2Q2019 Apr 17, 2019 2DBP-01 #1 MP-12 SAMPLE SITE 3 0.039 0.039 0.041 0.043
1Q2019 Jan 16, 2019 2DBP-01 #1 MP-12 SAMPLE SITE 3 0.032 0.035 0.031 0.033
4Q2018 Oct 10, 2018 2DBP-01 #1 MP-12 SAMPLE SITE 3 0.029 0.038 0.028 0.039
3Q2018 Sep 19, 2018 2DBP-01 #1 MP-12 SAMPLE SITE 3 0.025 0.029 0.022 0.024
2Q2018 Apr 27, 2018 2DBP-01 #1 MP-12 SAMPLE SITE 3 0.019 0.017 0.016 0.015
1Q2018 Jan 10, 2018 2DBP-01 #1 MP-12 SAMPLE SITE 3 0.018 0.018 0.016 0.016
4Q2017 Oct 11, 2017 2DBP-01 #1 MP-12 SAMPLE SITE 3 0.018 0.022 0.017 0.021
3Q2017 Jul 12, 2017 2DBP-01 #1 MP-12 SAMPLE SITE 3 0.025 0.017 0.022 0.013
2Q2017 Apr 19, 2017 2DBP-01 #1 MP-12 SAMPLE SITE 3 0.026 0.022 0.027 0.021
1Q2017 Jan 18, 2017 2DBP-01 #1 MP-12 SAMPLE SITE 3 0.028 0.026 0.031 0.028
4Q2016 Oct 12, 2016 2DBP-01 #1 MP-12 SAMPLE SITE 3 0.031 0.039 0.031 0.040
3Q2016 Jul 13, 2016 2DBP-01 #1 MP-12 SAMPLE SITE 3 0.026 0.024 0.026 0.026
2Q2016 Apr 13, 2016 2DBP-01 #1 MP-12 SAMPLE SITE 3 0.025 0.025 0.022 0.024
1Q2016 Jan 13, 2016 2DBP-01 #1 MP-12 SAMPLE SITE 3 0.029 0.025 0.027 0.021
4Q2015 Oct 14, 2015 2DBP-01 #1 MP-12 SAMPLE SITE 3 0.031 0.032 0.032 0.031
3Q2015 Jul 15, 2015 2DBP-01 #1 MP-12 SAMPLE SITE 3 0.029 0.029 0.031 0.028
2Q2015 Apr 15, 2015 2DBP-01 #1 MP-12 SAMPLE SITE 3 0.030 0.032 0.033 0.038
1Q2015 Jan 14, 2015 2DBP-01 #1 MP-12 SAMPLE SITE 3 0.025 0.027 0.026 0.030
4Q2014 Nov 19, 2014 2DBP-01 #1 MP-12 SAMPLE SITE 3 0.023 0.024 0.021 0.025
3Q2014 Aug 27, 2014 2DBP-01 #1 MP-12 SAMPLE SITE 3 0.023 0.024 0.023 0.019
2Q2014 Apr 16, 2014 2DBP-01 #1 MP-12 SAMPLE SITE 3 0.016 0.020 0.017 0.021
1Q2014 Jan 15, 2014 2DBP-01 #1 MP-12 SAMPLE SITE 3 0.012 0.013
4Q2013 Oct 16, 2013 2DBP-01 #1 MP-12 SAMPLE SITE 3 0.007 0.009



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