OHA Drinking Water Services
OR41
PWS ID: 00724 ---- ST HELENS, 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 14, 2024 2DBP-01 SYKES RD & CADE DR 0.021 0.020 0.002 0.001
1Q2024 Feb 24, 2024 2DBP-02 IVY LN & N. VERNONIA RD 0.019 0.018 0.002 0.001
4Q2023 Nov 08, 2023 2DBP-01 SYKES RD & CADE DR 0.020 0.021 0.001 0.002
4Q2023 Nov 08, 2023 2DBP-02 IVY LN & N. VERNONIA RD 0.018 0.026 0.001 0.002
3Q2023 Aug 16, 2023 2DBP-01 SYKES RD & CADE DR 0.024 0.027 0.002 0.002
3Q2023 Aug 16, 2023 2DBP-02 IVY LN & N. VERNONIA RD 0.011 0.013 0.002 0.002
2Q2023 May 17, 2023 2DBP-01 SYKES RD & CADE DR 0.021 0.018 0.002 0.003
2Q2023 May 17, 2023 2DBP-02 IVY LN & N. VERNONIA RD 0.010 0.011 0.002 0.002
1Q2023 Feb 15, 2023 2DBP-01 SYKES RD & CADE DR 0.019 0.019 0.001 0.001
1Q2023 Feb 15, 2023 2DBP-02 IVY LN & N. VERNONIA RD 0.008 0.008 0.001 0.001
4Q2022 Nov 16, 2022 2DBP-01 SYKES RD & CADE DR 0.019 0.025 0.001 0.001
4Q2022 Nov 16, 2022 2DBP-02 IVY LN & N. VERNONIA RD 0.008 0.009 0.001 0.001
3Q2022 Aug 17, 2022 2DBP-01 SYKES RD & CADE DR 0.015 0.019 0.001 0.001
3Q2022 Aug 17, 2022 2DBP-02 IVY LN & N. VERNONIA RD 0.009 0.009 0.002 0.002
2Q2022 May 11, 2022 2DBP-01 SYKES RD & CADE DR 0.017 0.009 0.001 0.001
2Q2022 May 11, 2022 2DBP-02 IVY LN & N. VERNONIA RD 0.007 0.007 0.001 0.001
1Q2022 Feb 16, 2022 2DBP-01 SYKES RD & CADE DR 0.017 0.017 0.002 0.002
1Q2022 Feb 16, 2022 2DBP-02 IVY LN & N. VERNONIA RD 0.008 0.008 0.001 0.001
4Q2021 Nov 17, 2021 2DBP-01 SYKES RD & CADE DR 0.017 0.018 0.001 0.002
4Q2021 Nov 17, 2021 2DBP-02 IVY LN & N. VERNONIA RD 0.008 0.008 0 0.001
3Q2021 Aug 11, 2021 2DBP-01 SYKES RD & CADE DR 0.016 0.023 0.001 0.001
3Q2021 Aug 11, 2021 2DBP-02 IVY LN & N. VERNONIA RD 0.006 0.006 0 0
2Q2021 May 19, 2021 2DBP-01 SYKES RD & CADE DR 0.014 0.008 0.001 0.001
2Q2021 May 19, 2021 2DBP-02 IVY LN & N. VERNONIA RD 0.007 0.007 0 0
1Q2021 Mar 03, 2021 2DBP-01 SYKES RD & CADE DR 0.014 0.013 0.001 0.001
1Q2021 Mar 03, 2021 2DBP-02 IVY LN & N. VERNONIA RD 0.006 0.007 0 0
4Q2020 Nov 18, 2020 2DBP-01 SYKES RD & CADE DR 0.014 0.014 0.001 0.002
4Q2020 Nov 18, 2020 2DBP-02 IVY LN & N. VERNONIA RD 0.006 0.006 0.001 0
3Q2020 Sep 21, 2020 2DBP-01 SYKES RD & CADE DR 0.014 0.020 0.001 0.002
3Q2020 Sep 21, 2020 2DBP-02 IVY LN & N. VERNONIA RD 0.007 0.007 0.001 0.001
2Q2020 May 20, 2020 2DBP-01 SYKES RD & CADE DR 0.011 0.009 0.001 0.001
2Q2020 May 20, 2020 2DBP-02 IVY LN & N. VERNONIA RD 0.007 0.006 0.001 0.001
1Q2020 Feb 19, 2020 2DBP-01 SYKES RD & CADE DR 0.015 0.010 0.002 0.001
1Q2020 Feb 19, 2020 2DBP-02 IVY LN & N. VERNONIA RD 0.010 0.008 0.002 0.002
4Q2019 Nov 20, 2019 2DBP-01 SYKES RD & CADE DR 0.015 0.014 0.003 0.003
4Q2019 Nov 20, 2019 2DBP-02 IVY LN & N. VERNONIA RD 0.010 0.009 0.002 0.002
3Q2019 Aug 14, 2019 2DBP-01 SYKES RD & CADE DR 0.021 0.019 0.003 0.003
3Q2019 Aug 14, 2019 2DBP-02 IVY LN & N. VERNONIA RD 0.010 0.011 0.002 0.002
2Q2019 May 22, 2019 2DBP-01 SYKES RD & CADE DR 0.023 0.022 0.002 0.003
2Q2019 May 22, 2019 2DBP-02 IVY LN & N. VERNONIA RD 0.010 0.012 0.002 0.003
1Q2019 Feb 20, 2019 2DBP-01 SYKES RD & CADE DR 0.025 0.019 0.003 0.001
1Q2019 Feb 20, 2019 2DBP-02 IVY LN & N. VERNONIA RD 0.012 0.008 0.003 0.001
4Q2018 Nov 14, 2018 2DBP-01 SYKES RD & CADE DR 0.024 0.031 0.004 0.003
4Q2018 Nov 14, 2018 2DBP-02 IVY LN & N. VERNONIA RD 0.012 0.013 0.004 0.003
3Q2018 Aug 22, 2018 2DBP-01 SYKES RD & CADE DR 0.020 0.023 0.004 0.005
3Q2018 Aug 15, 2018 2DBP-02 IVY LN & N. VERNONIA RD 0.011 0.012 0.004 0.004
2Q2018 May 23, 2018 2DBP-01 SYKES RD & CADE DR 0.017 0.020 0.004 0.006
2Q2018 May 23, 2018 2DBP-02 IVY LN & N. VERNONIA RD 0.011 0.015 0.004 0.006
1Q2018 Feb 21, 2018 2DBP-01 SYKES RD & CADE DR 0.014 0.011 0.004 0.003
1Q2018 Feb 21, 2018 2DBP-02 IVY LN & N. VERNONIA RD 0.007 0.006 0.003 0.003
4Q2017 Nov 15, 2017 2DBP-01 SYKES RD & CADE DR 0.016 0.016 0.005 0.003
4Q2017 Nov 15, 2017 2DBP-02 IVY LN & N. VERNONIA RD 0.008 0.007 0.003 0.002
3Q2017 Aug 09, 2017 2DBP-01 SYKES RD & CADE DR 0.018 0.017 0.005 0.005
3Q2017 Aug 09, 2017 2DBP-02 IVY LN & N. VERNONIA RD 0.009 0.009 0.003 0.004
2Q2017 May 10, 2017 2DBP-01 SYKES RD & CADE DR 0.018 0.017 0.005 0.006
2Q2017 May 10, 2017 2DBP-02 IVY LN & N. VERNONIA RD 0.010 0.009 0.004 0.004
1Q2017 Feb 15, 2017 2DBP-01 SYKES RD & CADE DR 0.018 0.017 0.004 0.005
1Q2017 Feb 15, 2017 2DBP-02 IVY LN & N. VERNONIA RD 0.011 0.010 0.003 0.004
4Q2016 Nov 09, 2016 2DBP-01 SYKES RD & CADE DR 0.016 0.019 0.002 0.002
4Q2016 Nov 09, 2016 2DBP-02 IVY LN & N. VERNONIA RD 0.009 0.010 0.001 0.002
4Q2016 Nov 09, 2016 2DBP-03 RAILROAD AVE & 1ST ST 0.009 0.010 0.001 0.001
4Q2016 Nov 09, 2016 2DBP-04 GABLE RD @ HS 0.009 0.009 0.001 0.002
3Q2016 Aug 17, 2016 2DBP-01 SYKES RD & CADE DR 0.014 0.015 0.001 0.002
3Q2016 Aug 17, 2016 2DBP-02 IVY LN & N. VERNONIA RD 0.009 0.009 0.001 0.002
3Q2016 Aug 17, 2016 2DBP-03 RAILROAD AVE & 1ST ST 0.008 0.009 0.001 0.001
3Q2016 Aug 17, 2016 2DBP-04 GABLE RD @ HS 0.009 0.010 0.001 0.002
2Q2016 May 18, 2016 2DBP-01 SYKES RD & CADE DR 0.016 0.014 0.001 0.002
2Q2016 May 18, 2016 2DBP-02 IVY LN & N. VERNONIA RD 0.008 0.010 0.001 0.001
2Q2016 May 18, 2016 2DBP-03 RAILROAD AVE & 1ST ST 0.009 0.009 0 0.001
2Q2016 May 18, 2016 2DBP-04 GABLE RD @ HS 0.008 0.010 0.001 0.001
1Q2016 Feb 17, 2016 2DBP-01 SYKES RD & CADE DR 0.014 0.013 0.001 0.001
1Q2016 Feb 17, 2016 2DBP-02 IVY LN & N. VERNONIA RD 0.007 0.006 0 0
1Q2016 Feb 17, 2016 2DBP-03 RAILROAD AVE & 1ST ST 0.009 0.008 0 0
1Q2016 Feb 17, 2016 2DBP-04 GABLE RD @ HS 0.008 0.006 0 0
4Q2015 Nov 20, 2015 2DBP-01 SYKES RD & CADE DR 0.016 0.016 0 0
4Q2015 Nov 20, 2015 2DBP-02 IVY LN & N. VERNONIA RD 0.009 0.008 0 0
4Q2015 Nov 20, 2015 2DBP-03 RAILROAD AVE & 1ST ST 0.010 0.009 0 0
4Q2015 Nov 20, 2015 2DBP-04 GABLE RD @ HS 0.010 0.009 0 0
3Q2015 Sep 09, 2015 2DBP-01 SYKES RD & CADE DR 0.018 0.019 0.001 0
3Q2015 Sep 09, 2015 2DBP-02 IVY LN & N. VERNONIA RD 0.008 0.008 0.001 0
3Q2015 Sep 09, 2015 2DBP-03 RAILROAD AVE & 1ST ST 0.011 0.011 0.001 0
3Q2015 Sep 09, 2015 2DBP-04 GABLE RD @ HS 0.011 0.009 0.001 0
2Q2015 May 06, 2015 2DBP-01 SYKES RD & CADE DR 0.017 0.015 0.001 0.001
2Q2015 May 06, 2015 2DBP-02 IVY LN & N. VERNONIA RD 0.008 0.009 0.001 0.001
2Q2015 May 06, 2015 2DBP-03 RAILROAD AVE & 1ST ST 0.010 0.010 0.001 0.001
2Q2015 May 06, 2015 2DBP-04 GABLE RD @ HS 0.012 0.012 0.001 0.001
1Q2015 Feb 25, 2015 2DBP-01 SYKES RD & CADE DR 0.017 0.017 0.001 0.001
1Q2015 Feb 25, 2015 2DBP-02 IVY LN & N. VERNONIA RD 0.007 0.009 0 0
1Q2015 Feb 25, 2015 2DBP-03 RAILROAD AVE & 1ST ST 0.010 0.011 0.001 0.001
1Q2015 Feb 25, 2015 2DBP-04 GABLE RD @ HS 0.011 0.012 0.001 0.001
4Q2014 Nov 05, 2014 2DBP-01 SYKES RD & CADE DR 0.016 0.020 0.002 0.001
4Q2014 Nov 05, 2014 2DBP-02 IVY LN & N. VERNONIA RD 0.006 0.006 0.001 0.001
4Q2014 Nov 05, 2014 2DBP-03 RAILROAD AVE & 1ST ST 0.010 0.010 0.002 0.002
4Q2014 Nov 05, 2014 2DBP-04 GABLE RD @ HS 0.010 0.011 0.002 0.002
3Q2014 Sep 10, 2014 2DBP-01 SYKES RD & CADE DR 0.015 0.015 0.002 0.002
3Q2014 Sep 10, 2014 2DBP-02 IVY LN & N. VERNONIA RD 0.007 0.005 0.002 0.002
3Q2014 Sep 10, 2014 2DBP-03 RAILROAD AVE & 1ST ST 0.009 0.009 0.002 0.002
3Q2014 Sep 10, 2014 2DBP-04 GABLE RD @ HS 0.010 0.010 0.002 0.002
2Q2014 May 28, 2014 2DBP-01 SYKES RD & CADE DR 0.010 0.013 0.002 0.002
2Q2014 May 28, 2014 2DBP-02 IVY LN & N. VERNONIA RD 0.006 0.007 0.002 0.002
2Q2014 May 28, 2014 2DBP-03 RAILROAD AVE & 1ST ST 0.007 0.009 0.002 0.002
2Q2014 May 28, 2014 2DBP-04 GABLE RD @ HS 0.007 0.009 0.002 0.002
1Q2014 Feb 19, 2014 2DBP-01 SYKES RD & CADE DR 0.007 0.001
1Q2014 Feb 19, 2014 2DBP-02 IVY LN & N. VERNONIA RD 0.004 0.002
1Q2014 Feb 19, 2014 2DBP-03 RAILROAD AVE & 1ST ST 0.005 0.001
1Q2014 Feb 19, 2014 2DBP-04 GABLE RD @ HS 0.004 0.001
4Q2013 Nov 13, 2013 2DBP-01 SYKES RD & CADE DR 0.004 0
4Q2013 Nov 13, 2013 2DBP-02 IVY LN & N. VERNONIA RD 0.003 0.001
4Q2013 Nov 13, 2013 2DBP-03 RAILROAD AVE & 1ST ST 0.002 0
4Q2013 Nov 13, 2013 2DBP-04 GABLE RD @ HS 0.002 0



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