OHA Drinking Water Services
OR41
PWS ID: 00312 ---- GASTON, 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 Feb 20, 2024 2DBP-01 S1 - 29410 MATTESON RD 0.025 0.026
1Q2024 Feb 20, 2024 2DBP-02 SM #2 - 45884 SOUTH RD 0.029 0.029
4Q2023 Nov 22, 2023 2DBP-01 S1 - 29410 MATTESON RD 0.024 0.026
4Q2023 Nov 22, 2023 2DBP-02 SM #2 - 45884 SOUTH RD 0.029 0.034
3Q2023 Aug 22, 2023 2DBP-01 S1 - 29410 MATTESON RD 0.023 0.024
3Q2023 Aug 22, 2023 2DBP-02 SM #2 - 45884 SOUTH RD 0.024 0.026
2Q2023 May 23, 2023 2DBP-01 S1 - 29410 MATTESON RD 0.022 0.020
2Q2023 May 23, 2023 2DBP-02 SM #2 - 45884 SOUTH RD 0.022 0.021
1Q2023 Feb 20, 2023 2DBP-01 S1 - 29410 MATTESON RD 0.024 0.023
1Q2023 Feb 20, 2023 2DBP-02 SM #2 - 45884 SOUTH RD 0.023 0.022
4Q2022 Nov 01, 2022 2DBP-01 S1 - 29410 MATTESON RD 0.019 0.025
4Q2022 Nov 01, 2022 2DBP-02 SM #2 - 45884 SOUTH RD 0.023 0.023
3Q2022 Aug 16, 2022 2DBP-01 S1 - 29410 MATTESON RD 0.023 0.020
3Q2022 Aug 16, 2022 2DBP-02 SM #2 - 45884 SOUTH RD 0.027 0.025
2Q2022 May 10, 2022 2DBP-01 S1 - 29410 MATTESON RD 0.028 0.021
2Q2022 May 10, 2022 2DBP-02 SM #2 - 45884 SOUTH RD 0.026 0.027
1Q2022 Feb 15, 2022 2DBP-01 S1 - 29410 MATTESON RD 0.026 0.030
1Q2022 Feb 15, 2022 2DBP-02 SM #2 - 45884 SOUTH RD 0.023 0.026
4Q2021 Nov 09, 2021 2DBP-01 S1 - 29410 MATTESON RD 0.030 0.036
4Q2021 Nov 09, 2021 2DBP-02 SM #2 - 45884 SOUTH RD 0.021 0.027
3Q2021 Aug 10, 2021 2DBP-01 S1 - 29410 MATTESON RD 0.030 0.033
3Q2021 Aug 10, 2021 2DBP-02 SM #2 - 45884 SOUTH RD 0.022 0.018
2Q2021 May 11, 2021 2DBP-01 S1 - 29410 MATTESON RD 0.027 0.021
2Q2021 May 11, 2021 2DBP-02 SM #2 - 45884 SOUTH RD 0.024 0.020
1Q2021 Feb 02, 2021 2DBP-01 S1 - 29410 MATTESON RD 0.029 0.028
1Q2021 Feb 02, 2021 2DBP-02 SM #2 - 45884 SOUTH RD 0.028 0.024
4Q2020 Nov 17, 2020 2DBP-01 S1 - 29410 MATTESON RD 0.033 0.035
4Q2020 Nov 17, 2020 2DBP-02 SM #2 - 45884 SOUTH RD 0.034 0.035
3Q2020 Aug 11, 2020 2DBP-01 S1 - 29410 MATTESON RD 0.034 0.033
3Q2020 Aug 25, 2020 2DBP-02 SM #2 - 45884 SOUTH RD 0.033 0.032
2Q2020 May 12, 2020 2DBP-01 S1 - 29410 MATTESON RD 0.030 0.031
2Q2020 Apr 21, 2020 2DBP-02 SM #2 - 45884 SOUTH RD 0.033 0.032
1Q2020 Feb 24, 2020 2DBP-01 S1 - 29410 MATTESON RD 0.030 0.032
1Q2020 Feb 24, 2020 2DBP-02 SM #2 - 45884 SOUTH RD 0.027 0.034
4Q2019 Nov 14, 2019 2DBP-01 S1 - 29410 MATTESON RD 0.027 0.033
4Q2019 Nov 14, 2019 2DBP-02 SM #2 - 45884 SOUTH RD 0.031 0.027
3Q2019 Jul 29, 2019 2DBP-01 S1 - 29410 MATTESON RD 0.023 0.021
3Q2019 Jul 29, 2019 2DBP-02 SM #2 - 45884 SOUTH RD 0.027 0.030
2Q2019 Apr 02, 2019 2DBP-01 S1 - 29410 MATTESON RD 0.024 0.024
2Q2019 Apr 02, 2019 2DBP-02 SM #2 - 45884 SOUTH RD 0.027 0.021
1Q2019 Jan 03, 2019 2DBP-01 S1 - 29410 MATTESON RD 0.022 0.023
1Q2019 Jan 03, 2019 2DBP-02 SM #2 - 45884 SOUTH RD 0.032 0.039
4Q2018 Oct 01, 2018 2DBP-01 S1 - 29410 MATTESON RD 0.022 0.023
4Q2018 Oct 01, 2018 2DBP-02 SM #2 - 45884 SOUTH RD 0.027 0.023
3Q2018 Jul 03, 2018 2DBP-01 S1 - 29410 MATTESON RD 0.023 0.022
3Q2018 Jul 03, 2018 2DBP-02 SM #2 - 45884 SOUTH RD 0.028 0.031
2Q2018 Apr 02, 2018 2DBP-01 S1 - 29410 MATTESON RD 0.024 0.022
2Q2018 Apr 02, 2018 2DBP-02 SM #2 - 45884 SOUTH RD 0.026 0.026
1Q2018 Jan 05, 2018 2DBP-01 S1 - 29410 MATTESON RD 0.026 0.024
1Q2018 Jan 05, 2018 2DBP-02 SM #2 - 45884 SOUTH RD 0.028 0.029
4Q2017 Oct 06, 2017 2DBP-01 S1 - 29410 MATTESON RD 0.025 0.029
4Q2017 Oct 06, 2017 2DBP-02 SM #2 - 45884 SOUTH RD 0.026 0.025
3Q2017 Jul 06, 2017 2DBP-01 S1 - 29410 MATTESON RD 0.029 0.025
3Q2017 Jul 06, 2017 2DBP-02 SM #2 - 45884 SOUTH RD 0.030 0.026
2Q2017 Apr 12, 2017 2DBP-01 S1 - 29410 MATTESON RD 0.029 0.028 0.023
2Q2017 Apr 12, 2017 2DBP-02 SM #2 - 45884 SOUTH RD 0.040 0.033 0.033
1Q2017 Jan 18, 2017 2DBP-01 S1 - 29410 MATTESON RD 0.030 0.025 0.023
1Q2017 Jan 18, 2017 2DBP-02 SM #2 - 45884 SOUTH RD 0.040 0.033 0.031
4Q2016 Nov 03, 2016 2DBP-01 S1 - 29410 MATTESON RD 0.035 0.045 0.023
4Q2016 Nov 03, 2016 2DBP-02 SM #2 - 45884 SOUTH RD 0.040 0.034 0.040
3Q2016 Sep 26, 2016 2DBP-01 S1 - 29410 MATTESON RD 0.024 0.023 0.023
3Q2016 Sep 26, 2016 2DBP-02 SM #2 - 45884 SOUTH RD 0.040 0.040 0.027
2Q2016 2DBP-01 S1 - 29410 MATTESON RD 0.024
2Q2016 2DBP-02 SM #2 - 45884 SOUTH RD 0.027
1Q2016 Feb 19, 2016 2DBP-01 S1 - 29410 MATTESON RD 0.024 0.024
1Q2016 Feb 19, 2016 2DBP-02 SM #2 - 45884 SOUTH RD 0.027 0.027
4Q2015 2DBP-01 S1 - 29410 MATTESON RD 0.028
4Q2015 2DBP-02 SM #2 - 45884 SOUTH RD 0.036
3Q2015 2DBP-01 S1 - 29410 MATTESON RD 0.031
3Q2015 2DBP-02 SM #2 - 45884 SOUTH RD 0.030
2Q2015 2DBP-01 S1 - 29410 MATTESON RD 0.031
2Q2015 2DBP-02 SM #2 - 45884 SOUTH RD 0.030
1Q2015 Feb 12, 2015 2DBP-01 S1 - 29410 MATTESON RD 0.031 0.030
1Q2015 Feb 12, 2015 2DBP-02 SM #2 - 45884 SOUTH RD 0.030 0.032
4Q2014 Oct 21, 2014 2DBP-01 S1 - 29410 MATTESON RD 0.033 0.033
4Q2014 Oct 21, 2014 2DBP-02 SM #2 - 45884 SOUTH RD 0.025 0.025
3Q2014 2DBP-01 S1 - 29410 MATTESON RD 0.041
3Q2014 2DBP-02 SM #2 - 45884 SOUTH RD 0.028
2Q2014 2DBP-01 S1 - 29410 MATTESON RD 0.021
2Q2014 2DBP-02 SM #2 - 45884 SOUTH RD 0.014
1Q2014 2DBP-01 S1 - 29410 MATTESON RD 0.014
1Q2014 2DBP-02 SM #2 - 45884 SOUTH RD 0.009
4Q2013 Nov 12, 2013 2DBP-01 S1 - 29410 MATTESON RD 0.010
4Q2013 Nov 12, 2013 2DBP-02 SM #2 - 45884 SOUTH RD 0.007



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