OHA Drinking Water Services
OR41
PWS ID: 00944 ---- WEST LINN, 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 Jul 22, 2024 2DBP-01 SKYE PKWY SS 0.042 0.036 0.036 0.031
3Q2024 Jul 22, 2024 2DBP-02 HORTON PS 0.039 0.036 0.037 0.031
3Q2024 Jul 22, 2024 2DBP-03 WEST LINN PW 0.042 0.039 0.037 0.032
3Q2024 Jul 22, 2024 2DBP-04 WILDWOOD DR 0.045 0.039 0.033 0.030
2Q2024 Apr 23, 2024 2DBP-01 SKYE PKWY SS 0.044 0.042 0.037 0.037
2Q2024 Apr 23, 2024 2DBP-02 HORTON PS 0.040 0.039 0.039 0.039
2Q2024 Apr 23, 2024 2DBP-03 WEST LINN PW 0.041 0.041 0.037 0.039
2Q2024 Apr 23, 2024 2DBP-04 WILDWOOD DR 0.046 0.044 0.034 0.035
1Q2024 Jan 08, 2024 2DBP-01 SKYE PKWY SS 0.043 0.043 0.039 0.038
1Q2024 Jan 08, 2024 2DBP-02 HORTON PS 0.038 0.038 0.040 0.039
1Q2024 Jan 08, 2024 2DBP-03 WEST LINN PW 0.039 0.039 0.038 0.037
1Q2024 Jan 08, 2024 2DBP-04 WILDWOOD DR 0.044 0.045 0.034 0.033
4Q2023 Oct 25, 2023 2DBP-01 SKYE PKWY SS 0.045 0.049 0.041 0.041
4Q2023 Oct 25, 2023 2DBP-02 HORTON PS 0.040 0.043 0.042 0.044
4Q2023 Oct 25, 2023 2DBP-03 WEST LINN PW 0.041 0.045 0.040 0.042
4Q2023 Oct 25, 2023 2DBP-04 WILDWOOD DR 0.047 0.051 0.035 0.036
3Q2023 Jul 12, 2023 2DBP-01 SKYE PKWY SS 0.038 0.041 0.038 0.038
3Q2023 Jul 12, 2023 2DBP-02 HORTON PS 0.034 0.037 0.037 0.038
3Q2023 Jul 12, 2023 2DBP-03 WEST LINN PW 0.035 0.037 0.034 0.035
3Q2023 Jul 12, 2023 2DBP-04 WILDWOOD DR 0.041 0.043 0.033 0.032
2Q2023 Apr 12, 2023 2DBP-01 SKYE PKWY SS 0.040 0.035 0.040 0.041
2Q2023 Apr 12, 2023 2DBP-02 HORTON PS 0.036 0.031 0.038 0.038
2Q2023 Apr 12, 2023 2DBP-03 WEST LINN PW 0.040 0.034 0.038 0.037
2Q2023 Apr 12, 2023 2DBP-04 WILDWOOD DR 0.043 0.038 0.034 0.034
1Q2023 Jan 11, 2023 2DBP-01 SKYE PKWY SS 0.045 0.042 0.039 0.041
1Q2023 Jan 11, 2023 2DBP-02 HORTON PS 0.041 0.038 0.040 0.039
1Q2023 Jan 11, 2023 2DBP-03 WEST LINN PW 0.045 0.042 0.038 0.038
1Q2023 Jan 11, 2023 2DBP-04 WILDWOOD DR 0.049 0.046 0.034 0.033
4Q2022 Oct 14, 2022 2DBP-01 SKYE PKWY SS 0.045 0.042 0.037 0.036
4Q2022 Oct 14, 2022 2DBP-02 HORTON PS 0.042 0.039 0.039 0.036
4Q2022 Oct 14, 2022 2DBP-03 WEST LINN PW 0.045 0.043 0.037 0.034
4Q2022 Oct 14, 2022 2DBP-04 WILDWOOD DR 0.049 0.046 0.034 0.034
3Q2022 Jul 11, 2022 2DBP-01 SKYE PKWY SS 0.049 0.050 0.037 0.038
3Q2022 Jul 11, 2022 2DBP-02 HORTON PS 0.046 0.047 0.040 0.042
3Q2022 Jul 11, 2022 2DBP-03 WEST LINN PW 0.048 0.050 0.039 0.041
3Q2022 Jul 11, 2022 2DBP-04 WILDWOOD DR 0.053 0.054 0.034 0.035
2Q2022 Jun 02, 2022 2DBP-01 SKYE PKWY SS 0.047 0.049 0.034 0.038
2Q2022 Jun 02, 2022 2DBP-02 HORTON PS 0.045 0.046 0.037 0.041
2Q2022 Jun 02, 2022 2DBP-03 WEST LINN PW 0.045 0.048 0.034 0.039
2Q2022 Jun 02, 2022 2DBP-04 WILDWOOD DR 0.051 0.053 0.031 0.034
1Q2022 Jan 04, 2022 2DBP-01 SKYE PKWY SS 0.044 0.045 0.033 0.033
1Q2022 Jan 04, 2022 2DBP-02 HORTON PS 0.041 0.042 0.033 0.036
1Q2022 Jan 04, 2022 2DBP-03 WEST LINN PW 0.040 0.041 0.031 0.033
1Q2022 Jan 04, 2022 2DBP-04 WILDWOOD DR 0.047 0.049 0.030 0.030
4Q2021 Oct 19, 2021 2DBP-01 SKYE PKWY SS 0.046 0.045 0.032 0.032
4Q2021 Oct 19, 2021 2DBP-02 HORTON PS 0.043 0.042 0.033 0.031
4Q2021 Oct 19, 2021 2DBP-03 WEST LINN PW 0.042 0.041 0.032 0.030
4Q2021 Oct 19, 2021 2DBP-04 WILDWOOD DR 0.048 0.046 0.029 0.029
3Q2021 Jul 14, 2021 2DBP-01 SKYE PKWY SS 0.047 0.046 0.032 0.030
3Q2021 Jul 14, 2021 2DBP-02 HORTON PS 0.044 0.043 0.033 0.032
3Q2021 Jul 14, 2021 2DBP-03 WEST LINN PW 0.044 0.042 0.032 0.030
3Q2021 Jul 14, 2021 2DBP-04 WILDWOOD DR 0.050 0.047 0.028 0.028
2Q2021 Apr 14, 2021 2DBP-01 SKYE PKWY SS 0.046 0.045 0.033 0.034
2Q2021 Apr 14, 2021 2DBP-02 HORTON PS 0.042 0.041 0.034 0.034
2Q2021 Apr 14, 2021 2DBP-03 WEST LINN PW 0.042 0.042 0.033 0.033
2Q2021 Apr 14, 2021 2DBP-04 WILDWOOD DR 0.049 0.049 0.029 0.030
1Q2021 Jan 19, 2021 2DBP-01 SKYE PKWY SS 0.046 0.048 0.034 0.033
1Q2021 Jan 19, 2021 2DBP-02 HORTON PS 0.043 0.044 0.037 0.036
1Q2021 Jan 19, 2021 2DBP-03 WEST LINN PW 0.042 0.045 0.034 0.034
1Q2021 Jan 19, 2021 2DBP-04 WILDWOOD DR 0.049 0.052 0.030 0.029
4Q2020 Oct 15, 2020 2DBP-01 SKYE PKWY SS 0.046 0.046 0.035 0.033
4Q2020 Oct 15, 2020 2DBP-02 HORTON PS 0.042 0.043 0.038 0.036
4Q2020 Oct 15, 2020 2DBP-03 WEST LINN PW 0.042 0.043 0.036 0.033
4Q2020 Oct 15, 2020 2DBP-04 WILDWOOD DR 0.049 0.050 0.031 0.029
3Q2020 Jul 13, 2020 2DBP-01 SKYE PKWY SS 0.044 0.044 0.034 0.034
3Q2020 Jul 13, 2020 2DBP-02 HORTON PS 0.041 0.039 0.037 0.038
3Q2020 Jul 13, 2020 2DBP-03 WEST LINN PW 0.039 0.038 0.035 0.034
3Q2020 Jul 13, 2020 2DBP-04 WILDWOOD DR 0.046 0.044 0.031 0.031
2Q2020 Apr 14, 2020 2DBP-01 SKYE PKWY SS 0.045 0.044 0.033 0.036
2Q2020 Apr 14, 2020 2DBP-02 HORTON PS 0.042 0.041 0.035 0.039
2Q2020 Apr 14, 2020 2DBP-03 WEST LINN PW 0.041 0.039 0.034 0.038
2Q2020 Apr 14, 2020 2DBP-04 WILDWOOD DR 0.046 0.045 0.030 0.032
1Q2020 Jan 15, 2020 2DBP-01 SKYE PKWY SS 0.045 0.048 0.033 0.034
1Q2020 Jan 15, 2020 2DBP-02 HORTON PS 0.042 0.043 0.035 0.036
1Q2020 Jan 15, 2020 2DBP-03 WEST LINN PW 0.042 0.044 0.033 0.034
1Q2020 Jan 15, 2020 2DBP-04 WILDWOOD DR 0.046 0.050 0.030 0.030
4Q2019 Oct 14, 2019 2DBP-01 SKYE PKWY SS 0.042 0.043 0.033 0.030
4Q2019 Oct 14, 2019 2DBP-02 HORTON PS 0.041 0.042 0.035 0.032
4Q2019 Oct 14, 2019 2DBP-03 WEST LINN PW 0.041 0.041 0.034 0.030
4Q2019 Oct 14, 2019 2DBP-04 WILDWOOD DR 0.043 0.043 0.031 0.028
3Q2019 Jul 16, 2019 2DBP-01 SKYE PKWY SS 0.041 0.042 0.033 0.032
3Q2019 Jul 16, 2019 2DBP-02 HORTON PS 0.039 0.041 0.035 0.034
3Q2019 Jul 16, 2019 2DBP-03 WEST LINN PW 0.040 0.042 0.034 0.032
3Q2019 Jul 16, 2019 2DBP-04 WILDWOOD DR 0.041 0.042 0.030 0.029
2Q2019 Apr 15, 2019 2DBP-01 SKYE PKWY SS 0.039 0.039 0.032 0.037
2Q2019 Apr 15, 2019 2DBP-02 HORTON PS 0.039 0.038 0.035 0.038
2Q2019 Apr 15, 2019 2DBP-03 WEST LINN PW 0.039 0.039 0.034 0.038
2Q2019 Apr 15, 2019 2DBP-04 WILDWOOD DR 0.041 0.040 0.030 0.033
1Q2019 Jan 16, 2019 2DBP-01 SKYE PKWY SS 0.040 0.039 0.031 0.032
1Q2019 Jan 16, 2019 2DBP-02 HORTON PS 0.038 0.039 0.035 0.037
1Q2019 Jan 16, 2019 2DBP-03 WEST LINN PW 0.038 0.039 0.034 0.036
1Q2019 Jan 16, 2019 2DBP-04 WILDWOOD DR 0.041 0.043 0.029 0.031
4Q2018 Oct 16, 2018 2DBP-01 SKYE PKWY SS 0.038 0.040 0.032 0.028
4Q2018 Oct 16, 2018 2DBP-02 HORTON PS 0.035 0.036 0.033 0.030
4Q2018 Oct 16, 2018 2DBP-03 WEST LINN PW 0.036 0.037 0.032 0.029
4Q2018 Oct 16, 2018 2DBP-04 WILDWOOD DR 0.039 0.040 0.028 0.026
3Q2018 Jul 18, 2018 2DBP-01 SKYE PKWY SS 0.039 0.038 0.034 0.030
3Q2018 Jul 18, 2018 2DBP-02 HORTON PS 0.036 0.037 0.036 0.032
3Q2018 Jul 18, 2018 2DBP-03 WEST LINN PW 0.037 0.038 0.033 0.030
3Q2018 Jul 18, 2018 2DBP-04 WILDWOOD DR 0.038 0.040 0.031 0.027
2Q2018 Apr 19, 2018 2DBP-01 SKYE PKWY SS 0.037 0.040 0.035 0.037
2Q2018 Apr 19, 2018 2DBP-02 HORTON PS 0.032 0.035 0.037 0.040
2Q2018 Apr 19, 2018 2DBP-03 WEST LINN PW 0.032 0.035 0.034 0.037
2Q2018 Apr 19, 2018 2DBP-04 WILDWOOD DR 0.034 0.037 0.032 0.034
1Q2018 Jan 16, 2018 2DBP-01 SKYE PKWY SS 0.036 0.035 0.038 0.037
1Q2018 Jan 16, 2018 2DBP-02 HORTON PS 0.030 0.030 0.039 0.038
1Q2018 Jan 16, 2018 2DBP-03 WEST LINN PW 0.029 0.031 0.033 0.035
1Q2018 Jan 16, 2018 2DBP-04 WILDWOOD DR 0.033 0.034 0.035 0.032
4Q2017 Oct 16, 2017 2DBP-01 SKYE PKWY SS 0.033 0.038 0.035 0.036
4Q2017 Oct 16, 2017 2DBP-02 HORTON PS 0.027 0.032 0.036 0.038
4Q2017 Oct 16, 2017 2DBP-03 WEST LINN PW 0.025 0.030 0.029 0.032
4Q2017 Dec 16, 2017 2DBP-04 WILDWOOD DR 0.028 0.032 0.034 0.035
3Q2017 Jul 10, 2017 2DBP-01 SKYE PKWY SS 0.035 0.030 0.036 0.033
3Q2017 Jul 10, 2017 2DBP-02 HORTON PS 0.026 0.024 0.036 0.033
3Q2017 Jul 10, 2017 2DBP-03 WEST LINN PW 0.026 0.022 0.031 0.027
3Q2017 Jul 10, 2017 2DBP-04 WILDWOOD DR 0.029 0.026 0.034 0.032
2Q2017 Apr 13, 2017 2DBP-01 SKYE PKWY SS 0.037 0.037 0.038 0.041
2Q2017 Apr 13, 2017 2DBP-02 HORTON PS 0.028 0.027 0.036 0.040
2Q2017 Apr 13, 2017 2DBP-03 WEST LINN PW 0.028 0.026 0.032 0.033
2Q2017 Apr 13, 2017 2DBP-04 WILDWOOD DR 0.033 0.031 0.035 0.040
1Q2017 Jan 18, 2017 2DBP-01 SKYE PKWY SS 0.036 0.032 0.038 0.034
1Q2017 Jan 18, 2017 2DBP-02 HORTON PS 0.030 0.025 0.038 0.032
1Q2017 Jan 18, 2017 2DBP-03 WEST LINN PW 0.031 0.026 0.035 0.030
1Q2017 Jan 18, 2017 2DBP-04 WILDWOOD DR 0.035 0.029 0.036 0.031
4Q2016 Oct 12, 2016 2DBP-01 SKYE PKWY SS 0.040 0.043 0.039 0.039
4Q2016 Oct 12, 2016 2DBP-02 HORTON PS 0.034 0.034 0.040 0.040
4Q2016 Oct 12, 2016 2DBP-03 WEST LINN PW 0.035 0.037 0.037 0.040
4Q2016 Oct 12, 2016 2DBP-04 WILDWOOD DR 0.039 0.039 0.036 0.037
3Q2016 Jul 14, 2016 2DBP-01 SKYE PKWY SS 0.037 0.038 0.036 0.039
3Q2016 Jul 14, 2016 2DBP-02 HORTON PS 0.032 0.033 0.037 0.038
3Q2016 Jul 14, 2016 2DBP-03 WEST LINN PW 0.033 0.033 0.033 0.033
3Q2016 Jul 14, 2016 2DBP-04 WILDWOOD DR 0.039 0.039 0.033 0.035
2Q2016 Apr 14, 2016 2DBP-01 SKYE PKWY SS 0.036 0.036 0.034 0.040
2Q2016 Apr 14, 2016 2DBP-02 HORTON PS 0.031 0.032 0.036 0.042
2Q2016 Apr 14, 2016 2DBP-03 WEST LINN PW 0.033 0.033 0.032 0.037
2Q2016 Apr 14, 2016 2DBP-04 WILDWOOD DR 0.038 0.039 0.031 0.038
1Q2016 Jan 14, 2016 2DBP-01 SKYE PKWY SS 0.037 0.036 0.032 0.031
1Q2016 Jan 14, 2016 2DBP-02 HORTON PS 0.031 0.031 0.034 0.032
1Q2016 Jan 14, 2016 2DBP-03 WEST LINN PW 0.032 0.031 0.032 0.029
1Q2016 Jan 14, 2016 2DBP-04 WILDWOOD DR 0.037 0.037 0.029 0.027
4Q2015 Oct 14, 2015 2DBP-01 SKYE PKWY SS 0.037 0.037 0.033 0.030
4Q2015 Oct 14, 2015 2DBP-02 HORTON PS 0.030 0.030 0.034 0.032
4Q2015 Oct 14, 2015 2DBP-03 WEST LINN PW 0.031 0.032 0.033 0.030
4Q2015 Oct 14, 2015 2DBP-04 WILDWOOD DR 0.035 0.037 0.031 0.027
3Q2015 Jul 15, 2015 2DBP-01 SKYE PKWY SS 0.037 0.037 0.034 0.033
3Q2015 Jul 15, 2015 2DBP-02 HORTON PS 0.032 0.031 0.034 0.033
3Q2015 Jul 15, 2015 2DBP-03 WEST LINN PW 0.031 0.031 0.032 0.031
3Q2015 Jul 15, 2015 2DBP-04 WILDWOOD DR 0.037 0.035 0.032 0.031
2Q2015 Apr 07, 2015 2DBP-01 SKYE PKWY SS 0.037 0.038 0.035 0.038
2Q2015 Apr 07, 2015 2DBP-02 HORTON PS 0.030 0.033 0.035 0.039
2Q2015 Apr 07, 2015 2DBP-03 WEST LINN PW 0.030 0.032 0.033 0.037
2Q2015 Apr 07, 2015 2DBP-04 WILDWOOD DR 0.035 0.038 0.032 0.036
1Q2015 Jan 16, 2015 2DBP-01 SKYE PKWY SS 0.037 0.036 0.034 0.033
1Q2015 Jan 16, 2015 2DBP-02 HORTON PS 0.030 0.028 0.034 0.033
1Q2015 Jan 16, 2015 2DBP-03 WEST LINN PW 0.030 0.028 0.031 0.032
1Q2015 Jan 16, 2015 2DBP-04 WILDWOOD DR 0.034 0.034 0.032 0.032
4Q2014 Oct 13, 2014 2DBP-01 SKYE PKWY SS 0.038 0.038 0.033 0.032
4Q2014 Oct 13, 2014 2DBP-02 HORTON PS 0.031 0.031 0.033 0.032
4Q2014 Oct 13, 2014 2DBP-03 WEST LINN PW 0.032 0.031 0.030 0.029
4Q2014 Oct 13, 2014 2DBP-04 WILDWOOD DR 0.037 0.037 0.031 0.028
3Q2014 Jul 14, 2014 2DBP-01 SKYE PKWY SS 0.040 0.037 0.037 0.034
3Q2014 Jul 14, 2014 2DBP-02 HORTON PS 0.033 0.029 0.037 0.031
3Q2014 Jul 14, 2014 2DBP-03 WEST LINN PW 0.034 0.030 0.035 0.030
3Q2014 Jul 14, 2014 2DBP-04 WILDWOOD DR 0.037 0.033 0.034 0.030
2Q2014 Apr 15, 2014 2DBP-01 SKYE PKWY SS 0.031 0.041 0.030 0.039
2Q2014 Apr 15, 2014 2DBP-02 HORTON PS 0.027 0.035 0.031 0.040
2Q2014 Apr 15, 2014 2DBP-03 WEST LINN PW 0.028 0.036 0.028 0.037
2Q2014 Apr 15, 2014 2DBP-04 WILDWOOD DR 0.030 0.039 0.028 0.037
1Q2014 Jan 16, 2014 2DBP-01 SKYE PKWY SS 0.021 0.020
1Q2014 Jan 16, 2014 2DBP-02 HORTON PS 0.019 0.021
1Q2014 Jan 16, 2014 2DBP-03 WEST LINN PW 0.020 0.019
1Q2014 Jan 16, 2014 2DBP-04 WILDWOOD DR 0.022 0.018
4Q2013 Oct 16, 2013 2DBP-01 SKYE PKWY SS 0.012 0.011
4Q2013 Oct 16, 2013 2DBP-02 HORTON PS 0.011 0.012
4Q2013 Oct 16, 2013 2DBP-03 WEST LINN PW 0.010 0.011
4Q2013 Oct 16, 2013 2DBP-04 WILDWOOD DR 0.012 0.010



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