OHA Drinking Water Services
OR41
PWS ID: 00313 ---- LA WATER CO-OP
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
1Q2025 2DBP-01 BALD PEAK RD/HOLLY HILL 0.044 0.027
4Q2024 Nov 13, 2024 2DBP-01 BALD PEAK RD/HOLLY HILL 0.042 0.045 0.027 0.025
3Q2024 Sep 05, 2024 2DBP-01 BALD PEAK RD/HOLLY HILL 0.044 0.040 0.029 0.028
2Q2024 Jun 24, 2024 2DBP-01 BALD PEAK RD/HOLLY HILL 0.047 0.045 0.028 0.030
1Q2024 Mar 26, 2024 2DBP-01 BALD PEAK RD/HOLLY HILL 0.048 0.044 0.027 0.027
4Q2023 Dec 14, 2023 2DBP-01 BALD PEAK RD/HOLLY HILL 0.049 0.056 0.028 0.027
3Q2023 Sep 21, 2023 2DBP-01 BALD PEAK RD/HOLLY HILL 0.044 0.047 0.026 0.028
2Q2023 2DBP-01 BALD PEAK RD/HOLLY HILL
1Q2023 Mar 14, 2023 2DBP-01 BALD PEAK RD/HOLLY HILL 0.042 0.039 0.028 0.028
4Q2022 Dec 13, 2022 2DBP-01 BALD PEAK RD/HOLLY HILL 0.041 0.044 0.028 0.025
3Q2022 2DBP-01 BALD PEAK RD/HOLLY HILL 0.046 0.029
2Q2022 Jun 22, 2022 2DBP-01 BALD PEAK RD/HOLLY HILL 0.046 0.045 0.025 0.029
1Q2022 Mar 28, 2022 2DBP-01 BALD PEAK RD/HOLLY HILL 0.045 0.043 0.024 0.025
4Q2021 Dec 17, 2021 2DBP-01 BALD PEAK RD/HOLLY HILL 0.050 0.051 0.024 0.023
3Q2021 Sep 20, 2021 2DBP-01 BALD PEAK RD/HOLLY HILL 0.047 0.046 0.025 0.021
2Q2021 Apr 28, 2021 2DBP-01 BALD PEAK RD/HOLLY HILL 0.047 0.046 0.027 0.029
1Q2021 Jan 19, 2021 2DBP-01 BALD PEAK RD/HOLLY HILL 0.049 0.050 0.025 0.027
4Q2020 Dec 02, 2020 2DBP-01 BALD PEAK RD/HOLLY HILL 0.046 0.047 0.023 0.025
3Q2020 Sep 01, 2020 2DBP-01 BALD PEAK RD/HOLLY HILL 0.046 0.045 0.021 0.021
2Q2020 Jun 11, 2020 2DBP-01 BALD PEAK RD/HOLLY HILL 0.047 0.047 0.022 0.021
1Q2020 Mar 06, 2020 2DBP-01 BALD PEAK RD/HOLLY HILL 0.046 0.046 0.025 0.022
4Q2019 Nov 21, 2019 2DBP-01 BALD PEAK RD/HOLLY HILL 0.044 0.046 0.024 0.023
3Q2019 Jul 01, 2019 2DBP-01 BALD PEAK RD/HOLLY HILL 0.043 0.044 0.025 0.025
2Q2019 Apr 10, 2019 2DBP-01 BALD PEAK RD/HOLLY HILL 0.042 0.041 0.023 0.028
1Q2019 Feb 06, 2019 2DBP-01 BALD PEAK RD/HOLLY HILL 0.042 0.041 0.020 0.020
4Q2018 Dec 19, 2018 2DBP-01 BALD PEAK RD/HOLLY HILL 0.042 0.044 0.019 0.019
3Q2018 Aug 06, 2018 2DBP-01 BALD PEAK RD/HOLLY HILL 0.041 0.043 0.018 0.018
2Q2018 2DBP-01 BALD PEAK RD/HOLLY HILL 0.038 0.019
1Q2018 Feb 07, 2018 2DBP-01 BALD PEAK RD/HOLLY HILL 0.036 0.037 0.023 0.019
4Q2017 Nov 10, 2017 2DBP-01 BALD PEAK RD/HOLLY HILL 0.034 0.037 0.023 0.022
3Q2017 2DBP-01 BALD PEAK RD/HOLLY HILL 0.035 0.024
2Q2017 Jun 13, 2017 2DBP-01 BALD PEAK RD/HOLLY HILL 0.035 0.034 0.023 0.026
1Q2017 Jan 18, 2017 2DBP-01 BALD PEAK RD/HOLLY HILL 0.036 0.035 0.019 0.020
4Q2016 Dec 07, 2016 2DBP-01 BALD PEAK RD/HOLLY HILL 0.039 0.041 0.018 0.019
3Q2016 Sep 14, 2016 2DBP-01 BALD PEAK RD/HOLLY HILL 0.038 0.035 0.017 0.018
2Q2016 2DBP-01 BALD PEAK RD/HOLLY HILL 0.042 0.017
1Q2016 Jan 12, 2016 2DBP-01 BALD PEAK RD/HOLLY HILL 0.042 0.042 0.018 0.017
4Q2015 Nov 17, 2015 2DBP-01 BALD PEAK RD/HOLLY HILL 0.043 0.042 0.018 0.018
3Q2015 Jul 10, 2015 2DBP-01 BALD PEAK RD/HOLLY HILL 0.045 0.044 0.019 0.019
2Q2015 May 15, 2015 2DBP-01 BALD PEAK RD/HOLLY HILL 0.041 0.044 0.019 0.020
1Q2015 2DBP-01 BALD PEAK RD/HOLLY HILL 0.041 0.019
4Q2014 Oct 13, 2014 2DBP-01 BALD PEAK RD/HOLLY HILL 0.039 0.042 0.020 0.019
3Q2014 Jul 17, 2014 2DBP-01 BALD PEAK RD/HOLLY HILL 0.038 0.035 0.020 0.021
2Q2014 Apr 23, 2014 2DBP-01 BALD PEAK RD/HOLLY HILL 0.030 0.040 0.015 0.021
1Q2014 Jan 16, 2014 2DBP-01 BALD PEAK RD/HOLLY HILL 0.019 0.010
4Q2013 Nov 26, 2013 2DBP-01 BALD PEAK RD/HOLLY HILL 0.011 0.004



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