OHA Drinking Water Services
OR41
PWS ID: 00321 ---- GLADSTONE, 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 2DBP-01 535 WELTER CIR 0.021 0.037
1Q2024 2DBP-02 1515 CORNELL AVE 0.030 0.030
1Q2024 2DBP-03 555 EDGEWATER RD 0.045 0.036
1Q2024 2DBP-04 450 W ARLINGTON ST 0.029 0.029
4Q2023 Nov 13, 2023 2DBP-01 535 WELTER CIR 0.023 0.028 0.040 0.053
4Q2023 Nov 13, 2023 2DBP-02 1515 CORNELL AVE 0.035 0.047 0.038 0.052
4Q2023 Nov 13, 2023 2DBP-03 555 EDGEWATER RD 0.049 0.049 0.035 0.044
4Q2023 Nov 13, 2023 2DBP-04 450 W ARLINGTON ST 0.030 0.039 0.033 0.044
3Q2023 Aug 22, 2023 2DBP-01 535 WELTER CIR 0.020 0.016 0.029 0.025
3Q2023 Aug 22, 2023 2DBP-02 1515 CORNELL AVE 0.024 0.024 0.024 0.023
3Q2023 Aug 22, 2023 2DBP-03 555 EDGEWATER RD 0.045 0.036 0.028 0.024
3Q2023 Aug 22, 2023 2DBP-04 450 W ARLINGTON ST 0.024 0.022 0.024 0.020
2Q2023 May 09, 2023 2DBP-01 535 WELTER CIR 0.023 0.022 0.029 0.034
2Q2023 May 09, 2023 2DBP-02 1515 CORNELL AVE 0.023 0.026 0.023 0.027
2Q2023 May 09, 2023 2DBP-03 555 EDGEWATER RD 0.052 0.052 0.028 0.033
2Q2023 May 09, 2023 2DBP-04 450 W ARLINGTON ST 0.025 0.026 0.024 0.027
1Q2023 Mar 08, 2023 2DBP-01 535 WELTER CIR 0.027 0.023 0.030 0.027
1Q2023 Mar 08, 2023 2DBP-02 1515 CORNELL AVE 0.027 0.021 0.027 0.021
1Q2023 Mar 08, 2023 2DBP-03 555 EDGEWATER RD 0.055 0.058 0.029 0.025
1Q2023 Mar 08, 2023 2DBP-04 450 W ARLINGTON ST 0.028 0.022 0.029 0.022
4Q2022 Nov 22, 2022 2DBP-01 535 WELTER CIR 0.028 0.029 0.029 0.030
4Q2022 Nov 22, 2022 2DBP-02 1515 CORNELL AVE 0.028 0.028 0.027 0.027
4Q2022 Nov 22, 2022 2DBP-03 555 EDGEWATER RD 0.045 0.050 0.028 0.030
4Q2022 Nov 22, 2022 2DBP-04 450 W ARLINGTON ST 0.030 0.030 0.029 0.031
3Q2022 Aug 19, 2022 2DBP-01 535 WELTER CIR 0.034 0.027 0.032 0.025
3Q2022 Aug 19, 2022 2DBP-02 1515 CORNELL AVE 0.034 0.028 0.034 0.024
3Q2022 Aug 19, 2022 2DBP-03 555 EDGEWATER RD 0.042 0.044 0.032 0.024
3Q2022 Aug 19, 2022 2DBP-04 450 W ARLINGTON ST 0.034 0.028 0.031 0.026
2Q2022 May 09, 2022 2DBP-01 535 WELTER CIR 0.034 0.037 0.032 0.038
2Q2022 May 09, 2022 2DBP-02 1515 CORNELL AVE 0.036 0.040 0.035 0.042
2Q2022 May 09, 2022 2DBP-03 555 EDGEWATER RD 0.039 0.045 0.032 0.038
2Q2022 May 09, 2022 2DBP-04 450 W ARLINGTON ST 0.034 0.039 0.031 0.039
1Q2022 Feb 22, 2022 2DBP-01 535 WELTER CIR 0.029 0.031 0.029 0.028
1Q2022 Feb 22, 2022 2DBP-02 1515 CORNELL AVE 0.033 0.031 0.034 0.030
1Q2022 Feb 22, 2022 2DBP-03 555 EDGEWATER RD 0.033 0.032 0.031 0.028
1Q2022 Feb 22, 2022 2DBP-04 450 W ARLINGTON ST 0.030 0.030 0.026 0.025
4Q2021 Nov 22, 2021 2DBP-01 535 WELTER CIR 0.030 0.037 0.032 0.035
4Q2021 Nov 22, 2021 2DBP-02 1515 CORNELL AVE 0.035 0.039 0.037 0.041
4Q2021 Nov 22, 2021 2DBP-03 555 EDGEWATER RD 0.035 0.035 0.035 0.037
4Q2021 Nov 22, 2021 2DBP-04 450 W ARLINGTON ST 0.032 0.035 0.030 0.030
3Q2021 Aug 17, 2021 2DBP-01 535 WELTER CIR 0.023 0.022 0.027 0.024
3Q2021 Aug 17, 2021 2DBP-02 1515 CORNELL AVE 0.030 0.030 0.032 0.029
3Q2021 Aug 17, 2021 2DBP-03 555 EDGEWATER RD 0.034 0.034 0.031 0.028
3Q2021 Aug 17, 2021 2DBP-04 450 W ARLINGTON ST 0.029 0.026 0.028 0.024
2Q2021 May 12, 2021 2DBP-01 535 WELTER CIR 0.025 0.022 0.027 0.030
2Q2021 May 12, 2021 2DBP-02 1515 CORNELL AVE 0.029 0.032 0.031 0.037
2Q2021 May 12, 2021 2DBP-03 555 EDGEWATER RD 0.032 0.034 0.031 0.035
2Q2021 May 12, 2021 2DBP-04 450 W ARLINGTON ST 0.030 0.030 0.029 0.032
1Q2021 Feb 09, 2021 2DBP-01 535 WELTER CIR 0.029 0.027 0.028 0.028
1Q2021 Feb 09, 2021 2DBP-02 1515 CORNELL AVE 0.029 0.029 0.028 0.031
1Q2021 Feb 09, 2021 2DBP-03 555 EDGEWATER RD 0.032 0.033 0.030 0.032
1Q2021 Feb 09, 2021 2DBP-04 450 W ARLINGTON ST 0.031 0.032 0.029 0.031
4Q2020 Nov 09, 2020 2DBP-01 535 WELTER CIR 0.034 0.030 0.030 0.026
4Q2020 Nov 09, 2020 2DBP-02 1515 CORNELL AVE 0.030 0.029 0.029 0.026
4Q2020 Nov 09, 2020 2DBP-03 555 EDGEWATER RD 0.033 0.032 0.031 0.028
4Q2020 Nov 09, 2020 2DBP-04 450 W ARLINGTON ST 0.032 0.031 0.030 0.028
3Q2020 Aug 04, 2020 2DBP-01 535 WELTER CIR 0.041 0.034 0.034 0.027
3Q2020 Aug 04, 2020 2DBP-02 1515 CORNELL AVE 0.034 0.029 0.032 0.025
3Q2020 Aug 04, 2020 2DBP-03 555 EDGEWATER RD 0.039 0.030 0.036 0.027
3Q2020 Aug 04, 2020 2DBP-04 450 W ARLINGTON ST 0.033 0.030 0.033 0.026
2Q2020 May 14, 2020 2DBP-01 535 WELTER CIR 0.039 0.041 0.033 0.037
2Q2020 May 14, 2020 2DBP-02 1515 CORNELL AVE 0.032 0.036 0.031 0.035
2Q2020 May 14, 2020 2DBP-03 555 EDGEWATER RD 0.038 0.042 0.035 0.040
2Q2020 May 14, 2020 2DBP-04 450 W ARLINGTON ST 0.031 0.033 0.033 0.037
1Q2020 Feb 11, 2020 2DBP-01 535 WELTER CIR 0.040 0.042 0.032 0.036
1Q2020 Feb 11, 2020 2DBP-02 1515 CORNELL AVE 0.031 0.033 0.029 0.033
1Q2020 Feb 11, 2020 2DBP-03 555 EDGEWATER RD 0.036 0.040 0.033 0.037
1Q2020 Feb 11, 2020 2DBP-04 450 W ARLINGTON ST 0.031 0.033 0.031 0.035
4Q2019 Nov 05, 2019 2DBP-01 535 WELTER CIR 0.038 0.043 0.028 0.033
4Q2019 Nov 05, 2019 2DBP-02 1515 CORNELL AVE 0.032 0.032 0.026 0.030
4Q2019 Nov 05, 2019 2DBP-03 555 EDGEWATER RD 0.033 0.040 0.033 0.035
4Q2019 Nov 05, 2019 2DBP-04 450 W ARLINGTON ST 0.030 0.031 0.027 0.033
3Q2019 Aug 12, 2019 2DBP-01 535 WELTER CIR 0.040 0.030 0.031 0.021
3Q2019 Aug 12, 2019 2DBP-02 1515 CORNELL AVE 0.036 0.026 0.029 0.019
3Q2019 Aug 12, 2019 2DBP-03 555 EDGEWATER RD 0.036 0.023 0.036 0.024
3Q2019 Aug 12, 2019 2DBP-04 450 W ARLINGTON ST 0.033 0.024 0.027 0.019
2Q2019 May 09, 2019 2DBP-01 535 WELTER CIR 0.041 0.043 0.032 0.034
2Q2019 May 09, 2019 2DBP-02 1515 CORNELL AVE 0.038 0.038 0.030 0.031
2Q2019 May 09, 2019 2DBP-03 555 EDGEWATER RD 0.040 0.038 0.038 0.038
2Q2019 May 09, 2019 2DBP-04 450 W ARLINGTON ST 0.034 0.035 0.027 0.029
1Q2019 Feb 22, 2019 2DBP-01 535 WELTER CIR 0.038 0.042 0.031 0.031
1Q2019 Feb 22, 2019 2DBP-02 1515 CORNELL AVE 0.038 0.042 0.030 0.031
1Q2019 Feb 22, 2019 2DBP-03 555 EDGEWATER RD 0.040 0.041 0.038 0.042
1Q2019 Feb 22, 2019 2DBP-04 450 W ARLINGTON ST 0.033 0.036 0.026 0.027
4Q2018 Nov 15, 2018 2DBP-01 535 WELTER CIR 0.038 0.045 0.033 0.038
4Q2018 Nov 15, 2018 2DBP-02 1515 CORNELL AVE 0.035 0.043 0.030 0.037
4Q2018 Nov 15, 2018 2DBP-03 555 EDGEWATER RD 0.041 0.050 0.035 0.042
4Q2018 Nov 15, 2018 2DBP-04 450 W ARLINGTON ST 0.031 0.037 0.025 0.031
3Q2018 Aug 07, 2018 2DBP-01 535 WELTER CIR 0.033 0.029 0.027 0.023
3Q2018 Aug 07, 2018 2DBP-02 1515 CORNELL AVE 0.031 0.027 0.026 0.021
3Q2018 Aug 07, 2018 2DBP-03 555 EDGEWATER RD 0.034 0.031 0.030 0.025
3Q2018 Aug 07, 2018 2DBP-04 450 W ARLINGTON ST 0.028 0.025 0.023 0.017
2Q2018 May 29, 2018 2DBP-01 535 WELTER CIR 0.026 0.031 0.026 0.028
2Q2018 May 29, 2018 2DBP-02 1515 CORNELL AVE 0.029 0.031 0.025 0.027
2Q2018 May 29, 2018 2DBP-03 555 EDGEWATER RD 0.031 0.033 0.029 0.031
2Q2018 May 29, 2018 2DBP-04 450 W ARLINGTON ST 0.025 0.027 0.023 0.024
1Q2018 Feb 26, 2018 2DBP-01 535 WELTER CIR 0.027 0.029 0.027 0.029
1Q2018 Feb 26, 2018 2DBP-02 1515 CORNELL AVE 0.029 0.029 0.026 0.026
1Q2018 Feb 26, 2018 2DBP-03 555 EDGEWATER RD 0.033 0.034 0.030 0.031
1Q2018 Feb 26, 2018 2DBP-04 450 W ARLINGTON ST 0.027 0.027 0.024 0.024
4Q2017 Nov 14, 2017 2DBP-01 535 WELTER CIR 0.031 0.029 0.029 0.027
4Q2017 Nov 14, 2017 2DBP-02 1515 CORNELL AVE 0.033 0.033 0.031 0.029
4Q2017 Nov 14, 2017 2DBP-03 555 EDGEWATER RD 0.038 0.036 0.033 0.034
4Q2017 Nov 14, 2017 2DBP-04 450 W ARLINGTON ST 0.027 0.029 0.026 0.028
3Q2017 Aug 09, 2017 2DBP-01 535 WELTER CIR 0.037 0.018 0.039 0.024
3Q2017 Aug 09, 2017 2DBP-02 1515 CORNELL AVE 0.039 0.025 0.035 0.024
3Q2017 Aug 09, 2017 2DBP-03 555 EDGEWATER RD 0.043 0.030 0.036 0.025
3Q2017 Aug 09, 2017 2DBP-04 450 W ARLINGTON ST 0.032 0.021 0.031 0.019
2Q2017 2DBP-01 535 WELTER CIR 0.047 0.040
2Q2017 2DBP-02 1515 CORNELL AVE 0.040 0.037
2Q2017 2DBP-03 555 EDGEWATER RD 0.043 0.037
2Q2017 2DBP-04 450 W ARLINGTON ST 0.033 0.033
1Q2017 Feb 22, 2017 2DBP-01 535 WELTER CIR 0.044 0.048 0.040 0.040
1Q2017 Mar 13, 2017 2DBP-02 1515 CORNELL AVE 0.038 0.040 0.035 0.038
1Q2017 Feb 22, 2017 2DBP-03 555 EDGEWATER RD 0.040 0.045 0.035 0.038
1Q2017 Feb 22, 2017 2DBP-04 450 W ARLINGTON ST 0.031 0.033 0.033 0.033
4Q2016 Nov 07, 2016 2DBP-01 535 WELTER CIR 0.041 0.046 0.043 0.045
4Q2016 Nov 07, 2016 2DBP-02 1515 CORNELL AVE 0.038 0.043 0.035 0.038
4Q2016 Nov 07, 2016 2DBP-03 555 EDGEWATER RD 0.038 0.043 0.035 0.038
4Q2016 Nov 07, 2016 2DBP-04 450 W ARLINGTON ST 0.031 0.036 0.035 0.038
3Q2016 Aug 08, 2016 2DBP-01 535 WELTER CIR 0.047 0.034 0.048 0.033
3Q2016 Aug 08, 2016 2DBP-02 1515 CORNELL AVE 0.041 0.028 0.043 0.028
3Q2016 Aug 08, 2016 2DBP-03 555 EDGEWATER RD 0.030 0.028 0.038 0.028
3Q2016 Aug 08, 2016 2DBP-04 450 W ARLINGTON ST 0.033 0.024 0.038 0.028
2Q2016 May 25, 2016 2DBP-01 535 WELTER CIR 0.044 0.048 0.048 0.053
2Q2016 May 25, 2016 2DBP-02 1515 CORNELL AVE 0.041 0.044 0.043 0.045
2Q2016 May 25, 2016 2DBP-03 555 EDGEWATER RD 0.030 0.033 0.038 0.040
2Q2016 May 25, 2016 2DBP-04 450 W ARLINGTON ST 0.033 0.034 0.038 0.040
1Q2016 Feb 24, 2016 2DBP-01 535 WELTER CIR 0.043 0.046 0.043 0.050
1Q2016 Feb 24, 2016 2DBP-02 1515 CORNELL AVE 0.040 0.043 0.040 0.045
1Q2016 Feb 24, 2016 2DBP-03 555 EDGEWATER RD 0.028 0.033 0.035 0.040
1Q2016 Feb 24, 2016 2DBP-04 450 W ARLINGTON ST 0.032 0.034 0.035 0.040
4Q2015 Nov 24, 2015 2DBP-01 535 WELTER CIR 0.043 0.054 0.040 0.050
4Q2015 Nov 24, 2015 2DBP-02 1515 CORNELL AVE 0.038 0.048 0.038 0.050
4Q2015 Dec 28, 2015 2DBP-03 555 EDGEWATER RD 0.028 0.025 0.035 0.040
4Q2015 Dec 29, 2015 2DBP-04 450 W ARLINGTON ST 0.032 0.039 0.033 0.040
3Q2015 Aug 11, 2015 2DBP-01 535 WELTER CIR 0.038 0.028 0.030 0.025
3Q2015 Aug 11, 2015 2DBP-02 1515 CORNELL AVE 0.033 0.025 0.028 0.023
3Q2015 Aug 11, 2015 2DBP-03 555 EDGEWATER RD 0.035 0.025 0.030 0.025
3Q2015 Aug 11, 2015 2DBP-04 450 W ARLINGTON ST 0.030 0.023 0.028 0.023
2Q2015 May 05, 2015 2DBP-01 535 WELTER CIR 0.043 0.040 0.033 0.030
2Q2015 May 05, 2015 2DBP-02 1515 CORNELL AVE 0.037 0.035 0.030 0.028
2Q2015 May 05, 2015 2DBP-03 555 EDGEWATER RD 0.037 0.035 0.029 0.030
2Q2015 May 05, 2015 2DBP-04 450 W ARLINGTON ST 0.033 0.030 0.030 0.028
1Q2015 Mar 24, 2015 2DBP-01 535 WELTER CIR 0.047 0.047 0.035 0.040
1Q2015 Mar 24, 2015 2DBP-02 1515 CORNELL AVE 0.036 0.037 0.030 0.033
1Q2015 Mar 24, 2015 2DBP-03 555 EDGEWATER RD 0.041 0.042 0.032 0.034
1Q2015 Mar 24, 2015 2DBP-04 450 W ARLINGTON ST 0.040 0.037 0.035 0.033
4Q2014 Dec 15, 2014 2DBP-01 535 WELTER CIR 0.046 0.053 0.032 0.035
4Q2014 Dec 15, 2014 2DBP-02 1515 CORNELL AVE 0.038 0.043 0.030 0.033
4Q2014 Dec 15, 2014 2DBP-03 555 EDGEWATER RD 0.038 0.046 0.028 0.032
4Q2014 Dec 15, 2014 2DBP-04 450 W ARLINGTON ST 0.038 0.050 0.032 0.040
3Q2014 2DBP-01 535 WELTER CIR 0.035 0.026
3Q2014 2DBP-02 1515 CORNELL AVE 0.029 0.023
3Q2014 Jul 16, 2014 2DBP-03 555 EDGEWATER RD 0.029 0.030 0.022 0.020
3Q2014 2DBP-04 450 W ARLINGTON ST 0.023 0.019
2Q2014 Jun 23, 2014 2DBP-01 535 WELTER CIR 0.026 0.036 0.019 0.026
2Q2014 Jun 23, 2014 2DBP-02 1515 CORNELL AVE 0.022 0.029 0.017 0.022
2Q2014 Jun 23, 2014 2DBP-03 555 EDGEWATER RD 0.022 0.030 0.017
2Q2014 2DBP-04 450 W ARLINGTON ST 0.016 0.013
1Q2014 Mar 20, 2014 2DBP-01 535 WELTER CIR 0.016 0.013
1Q2014 Mar 20, 2014 2DBP-02 1515 CORNELL AVE 0.014 0.012
1Q2014 Mar 20, 2014 2DBP-03 555 EDGEWATER RD 0.013 0.013
1Q2014 Mar 20, 2014 2DBP-04 450 W ARLINGTON ST 0.012 0.010
4Q2013 Dec 17, 2013 2DBP-01 535 WELTER CIR 0.007 0.005
4Q2013 Dec 17, 2013 2DBP-02 1515 CORNELL AVE 0.006 0.004
4Q2013 Dec 17, 2013 2DBP-03 555 EDGEWATER RD 0.005 0.006
4Q2013 Dec 12, 2013 2DBP-04 450 W ARLINGTON ST 0.005 0.004



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