OHA Drinking Water Services
OR41
PWS ID: 00957 ---- WINSTON-DILLARD WATER DISTRICT
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 Oct 07, 2024 2DBP-01 SM SITE #2 - WILLIS CREEK INTERSECTION 0.051 0.059 0.039 0.044
4Q2024 Oct 07, 2024 2DBP-02 SITE #5 - 13224 LOOKING GLASS 0.035 0.043 0.030 0.032
3Q2024 Jul 11, 2024 2DBP-01 SM SITE #2 - WILLIS CREEK INTERSECTION 0.057 0.049 0.031 0.033
3Q2024 Jul 11, 2024 2DBP-02 SITE #5 - 13224 LOOKING GLASS 0.029 0.029 0.027 0.026
2Q2024 Apr 03, 2024 2DBP-01 SM SITE #2 - WILLIS CREEK INTERSECTION 0.052 0.049 0.030 0.031
2Q2024 Apr 03, 2024 2DBP-02 SITE #5 - 13224 LOOKING GLASS 0.028 0.024 0.025 0.026
1Q2024 Jan 10, 2024 2DBP-01 SM SITE #2 - WILLIS CREEK INTERSECTION 0.050 0.055 0.029 0.031
1Q2024 Jan 10, 2024 2DBP-02 SITE #5 - 13224 LOOKING GLASS 0.027 0.030 0.025 0.027
4Q2023 Oct 12, 2023 2DBP-01 SM SITE #2 - WILLIS CREEK INTERSECTION 0.050 0.064 0.038 0.027
4Q2023 Oct 12, 2023 2DBP-02 SITE #5 - 13224 LOOKING GLASS 0.030 0.029 0.032 0.025
3Q2023 Jul 10, 2023 2DBP-01 SM SITE #2 - WILLIS CREEK INTERSECTION 0.036 0.036 0.040 0.039
3Q2023 Jul 10, 2023 2DBP-02 SITE #5 - 13224 LOOKING GLASS 0.028 0.030 0.031 0.028
2Q2023 Apr 13, 2023 2DBP-01 SM SITE #2 - WILLIS CREEK INTERSECTION 0.033 0.032 0.041 0.040
2Q2023 Apr 13, 2023 2DBP-02 SITE #5 - 13224 LOOKING GLASS 0.023 0.023 0.036 0.033
1Q2023 Jan 17, 2023 2DBP-01 SM SITE #2 - WILLIS CREEK INTERSECTION 0.034 0.037 0.042 0.051
1Q2023 Jan 17, 2023 2DBP-02 SITE #5 - 13224 LOOKING GLASS 0.026 0.029 0.041 0.045
4Q2022 Oct 17, 2022 2DBP-01 SM SITE #2 - WILLIS CREEK INTERSECTION 0.034 0.034 0.039 0.033
4Q2022 Oct 17, 2022 2DBP-02 SITE #5 - 13224 LOOKING GLASS 0.018 0.023 0.032 0.033
3Q2022 Jul 06, 2022 2DBP-01 SM SITE #2 - WILLIS CREEK INTERSECTION 0.043 0.032 0.039 0.040
3Q2022 Jul 06, 2022 2DBP-02 SITE #5 - 13224 LOOKING GLASS 0.020 0.015 0.032 0.033
2Q2022 Apr 06, 2022 2DBP-01 SM SITE #2 - WILLIS CREEK INTERSECTION 0.053 0.042 0.034 0.038
2Q2022 Apr 06, 2022 2DBP-02 SITE #5 - 13224 LOOKING GLASS 0.030 0.023 0.030 0.035
1Q2022 Jan 10, 2022 2DBP-01 SM SITE #2 - WILLIS CREEK INTERSECTION 0.055 0.056 0.034 0.041
1Q2022 Jan 10, 2022 2DBP-02 SITE #5 - 13224 LOOKING GLASS 0.026 0.026 0.023 0.024
4Q2021 Oct 13, 2021 2DBP-01 SM SITE #2 - WILLIS CREEK INTERSECTION 0.054 0.063 0.036 0.028
4Q2021 Oct 13, 2021 2DBP-02 SITE #5 - 13224 LOOKING GLASS 0.028 0.033 0.025 0.025
3Q2021 Jul 07, 2021 2DBP-01 SM SITE #2 - WILLIS CREEK INTERSECTION 0.051 0.054 0.036 0.033
3Q2021 Jul 07, 2021 2DBP-02 SITE #5 - 13224 LOOKING GLASS 0.024 0.032 0.025 0.025
2Q2021 Apr 06, 2021 2DBP-01 SM SITE #2 - WILLIS CREEK INTERSECTION 0.053 0.041 0.041 0.039
2Q2021 Apr 06, 2021 2DBP-02 SITE #5 - 13224 LOOKING GLASS 0.023 0.014 0.024 0.023
1Q2021 Jan 12, 2021 2DBP-01 SM SITE #2 - WILLIS CREEK INTERSECTION 0.055 0.054 0.048 0.049
1Q2021 Jan 12, 2021 2DBP-02 SITE #5 - 13224 LOOKING GLASS 0.027 0.024 0.033 0.027
4Q2020 Oct 15, 2020 2DBP-01 SM SITE #2 - WILLIS CREEK INTERSECTION 0.056 0.062 0.045 0.039
4Q2020 Oct 15, 2020 2DBP-02 SITE #5 - 13224 LOOKING GLASS 0.028 0.029 0.033 0.032
3Q2020 Jul 09, 2020 2DBP-01 SM SITE #2 - WILLIS CREEK INTERSECTION 0.059 0.062 0.055 0.048
3Q2020 Jul 09, 2020 2DBP-02 SITE #5 - 13224 LOOKING GLASS 0.033 0.035 0.045 0.032
2Q2020 Apr 06, 2020 2DBP-01 SM SITE #2 - WILLIS CREEK INTERSECTION 0.056 0.048 0.057 0.060
2Q2020 Apr 06, 2020 2DBP-02 SITE #5 - 13224 LOOKING GLASS 0.034 0.028 0.052 0.053
1Q2020 Jan 07, 2020 2DBP-01 SM SITE #2 - WILLIS CREEK INTERSECTION 0.053 0.056 0.051 0.055
1Q2020 Jan 07, 2020 2DBP-02 SITE #5 - 13224 LOOKING GLASS 0.032 0.031 0.051 0.046
4Q2019 Oct 08, 2019 2DBP-01 SM SITE #2 - WILLIS CREEK INTERSECTION 0.052 0.061 0.047 0.055
4Q2019 Oct 08, 2019 2DBP-02 SITE #5 - 13224 LOOKING GLASS 0.036 0.038 0.052 0.062
3Q2019 Jul 08, 2019 2DBP-01 SM SITE #2 - WILLIS CREEK INTERSECTION 0.055 0.053 0.045 0.042
3Q2019 Jul 08, 2019 2DBP-02 SITE #5 - 13224 LOOKING GLASS 0.038 0.039 0.044 0.046
2Q2019 Apr 09, 2019 2DBP-01 SM SITE #2 - WILLIS CREEK INTERSECTION 0.054 0.043 0.042 0.042
2Q2019 Apr 09, 2019 2DBP-02 SITE #5 - 13224 LOOKING GLASS 0.030 0.030 0.038 0.043
1Q2019 Jan 08, 2019 2DBP-01 SM SITE #2 - WILLIS CREEK INTERSECTION 0.055 0.057 0.045 0.042
1Q2019 Jan 08, 2019 2DBP-02 SITE #5 - 13224 LOOKING GLASS 0.031 0.033 0.036 0.035
4Q2018 Oct 11, 2018 2DBP-01 SM SITE #2 - WILLIS CREEK INTERSECTION 0.054 0.067 0.045 0.050
4Q2018 Oct 11, 2018 2DBP-02 SITE #5 - 13224 LOOKING GLASS 0.028 0.036 0.034 0.038
3Q2018 Jul 09, 2018 2DBP-01 SM SITE #2 - WILLIS CREEK INTERSECTION 0.053 0.051 0.044 0.041
3Q2018 Jul 09, 2018 2DBP-02 SITE #5 - 13224 LOOKING GLASS 0.026 0.022 0.032 0.029
2Q2018 Apr 04, 2018 2DBP-01 SM SITE #2 - WILLIS CREEK INTERSECTION 0.048 0.043 0.044 0.047
2Q2018 Apr 04, 2018 2DBP-02 SITE #5 - 13224 LOOKING GLASS 0.032 0.026 0.034 0.034
1Q2018 Jan 10, 2018 2DBP-01 SM SITE #2 - WILLIS CREEK INTERSECTION 0.048 0.048 0.042 0.041
1Q2018 Jan 10, 2018 2DBP-02 SITE #5 - 13224 LOOKING GLASS 0.029 0.030 0.032 0.031
4Q2017 Oct 04, 2017 2DBP-01 SM SITE #2 - WILLIS CREEK INTERSECTION 0.047 0.060 0.043 0.046
4Q2017 Oct 04, 2017 2DBP-02 SITE #5 - 13224 LOOKING GLASS 0.029 0.035 0.033 0.034
3Q2017 Jul 12, 2017 2DBP-01 SM SITE #2 - WILLIS CREEK INTERSECTION 0.047 0.041 0.039 0.039
3Q2017 Jul 12, 2017 2DBP-02 SITE #5 - 13224 LOOKING GLASS 0.035 0.031 0.030 0.032
2Q2017 Apr 10, 2017 2DBP-01 SM SITE #2 - WILLIS CREEK INTERSECTION 0.048 0.042 0.037 0.041
2Q2017 Apr 10, 2017 2DBP-02 SITE #5 - 13224 LOOKING GLASS 0.030 0.027 0.027 0.028
1Q2017 Jan 12, 2017 2DBP-01 SM SITE #2 - WILLIS CREEK INTERSECTION 0.052 0.046 0.039 0.036
1Q2017 Jan 12, 2017 2DBP-02 SITE #5 - 13224 LOOKING GLASS 0.031 0.030 0.025 0.027
4Q2016 Oct 07, 2016 2DBP-01 SM SITE #2 - WILLIS CREEK INTERSECTION 0.051 0.065 0.038 0.037
4Q2016 Oct 07, 2016 2DBP-02 SITE #5 - 13224 LOOKING GLASS 0.030 0.044 0.023 0.024
3Q2016 Jul 12, 2016 2DBP-01 SM SITE #2 - WILLIS CREEK INTERSECTION 0.044 0.046 0.036 0.036
3Q2016 Jul 12, 2016 2DBP-02 SITE #5 - 13224 LOOKING GLASS 0.026 0.021 0.024 0.022
2Q2016 Apr 13, 2016 2DBP-01 SM SITE #2 - WILLIS CREEK INTERSECTION 0.047 0.042 0.038 0.043
2Q2016 Apr 13, 2016 2DBP-02 SITE #5 - 13224 LOOKING GLASS 0.030 0.023 0.025 0.024
1Q2016 Jan 12, 2016 2DBP-01 SM SITE #2 - WILLIS CREEK INTERSECTION 0.043 0.040 0.032 0.034
1Q2016 Jan 12, 2016 2DBP-02 SITE #5 - 13224 LOOKING GLASS 0.030 0.028 0.028 0.024
4Q2015 Oct 06, 2015 2DBP-01 SM SITE #2 - WILLIS CREEK INTERSECTION 0.044 0.049 0.030 0.029
4Q2015 Oct 06, 2015 2DBP-02 SITE #5 - 13224 LOOKING GLASS 0.031 0.040 0.028 0.031
3Q2015 Jul 07, 2015 2DBP-01 SM SITE #2 - WILLIS CREEK INTERSECTION 0.059 0.049 0.036 0.032
3Q2015 Jul 07, 2015 2DBP-02 SITE #5 - 13224 LOOKING GLASS 0.040 0.029 0.029 0.027
2Q2015 Apr 23, 2015 2DBP-01 SM SITE #2 - WILLIS CREEK INTERSECTION 0.066 0.051 0.033 0.034
2Q2015 Apr 23, 2015 2DBP-02 SITE #5 - 13224 LOOKING GLASS 0.048 0.035 0.029 0.031
1Q2015 Jan 16, 2015 2DBP-01 SM SITE #2 - WILLIS CREEK INTERSECTION 0.070 0.064 0.045 0.034
1Q2015 Jan 16, 2015 2DBP-02 SITE #5 - 13224 LOOKING GLASS 0.050 0.047 0.031 0.025
4Q2014 Oct 07, 2014 2DBP-01 SM SITE #2 - WILLIS CREEK INTERSECTION 0.080 0.090 0.049 0.051
4Q2014 Oct 07, 2014 2DBP-02 SITE #5 - 13224 LOOKING GLASS 0.053 0.068 0.037 0.035
3Q2014 Jul 15, 2014 2DBP-01 SM SITE #2 - WILLIS CREEK INTERSECTION 0.083 0.077 0.050 0.042
3Q2014 Jul 15, 2014 2DBP-02 SITE #5 - 13224 LOOKING GLASS 0.047 0.048 0.043 0.034
2Q2014 Apr 14, 2014 2DBP-01 SM SITE #2 - WILLIS CREEK INTERSECTION 0.060 0.073 0.044 0.063
2Q2014 Apr 14, 2014 2DBP-02 SITE #5 - 13224 LOOKING GLASS 0.030 0.037 0.037 0.048
1Q2014 Jan 22, 2014 2DBP-01 SM SITE #2 - WILLIS CREEK INTERSECTION 0.046 0.025
1Q2014 Jan 22, 2014 2DBP-02 SITE #5 - 13224 LOOKING GLASS 0.023 0.026
4Q2013 Oct 29, 2013 2DBP-01 SM SITE #2 - WILLIS CREEK INTERSECTION 0.030 0.014
4Q2013 Oct 29, 2013 2DBP-02 SITE #5 - 13224 LOOKING GLASS 0.016 0.016



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