OHA Drinking Water Services
OR41
PWS ID: 00823 ---- SILVERTON, 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 05, 2024 2DBP-01 400 SCHEMMEL LN 0.008 0.009 0.001 0.001
1Q2024 Feb 07, 2024 2DBP-02 879 W MAIN ST 0.012 0.013 0.001 0.001
4Q2023 Oct 04, 2023 2DBP-01 400 SCHEMMEL LN 0.008 0.009 0.001 0.001
4Q2023 Oct 04, 2023 2DBP-02 879 W MAIN ST 0.012 0.015 0.001 0.002
3Q2023 Aug 09, 2023 2DBP-01 400 SCHEMMEL LN 0.010 0.008 0.002 0.002
3Q2023 Aug 09, 2023 2DBP-02 879 W MAIN ST 0.011 0.012 0.001 0
2Q2023 Apr 03, 2023 2DBP-01 400 SCHEMMEL LN 0.008 0.008 0.001 0.002
2Q2023 Apr 03, 2023 2DBP-02 879 W MAIN ST 0.008 0.008 0.001 0.001
1Q2023 Jan 11, 2023 2DBP-01 400 SCHEMMEL LN 0.009 0.009 0.001 0.002
1Q2023 Jan 11, 2023 2DBP-02 879 W MAIN ST 0.008 0.008 0.001 0.001
4Q2022 Oct 25, 2022 2DBP-01 400 SCHEMMEL LN 0.008 0.011 0.001 0.002
4Q2022 Oct 25, 2022 2DBP-02 879 W MAIN ST 0.008 0.009 0.001 0.002
3Q2022 Jul 20, 2022 2DBP-01 400 SCHEMMEL LN 0.005 0.005 0.002 0
3Q2022 Jul 13, 2022 2DBP-02 879 W MAIN ST 0.008 0.006 0 0
2Q2022 May 25, 2022 2DBP-01 400 SCHEMMEL LN 0.006 0.005 0.004 0.002
2Q2022 May 18, 2022 2DBP-02 879 W MAIN ST 0.011 0.009 0.005 0
1Q2022 Jan 19, 2022 2DBP-01 400 SCHEMMEL LN 0.006 0.005 0.005 0.005
1Q2022 2DBP-02 879 W MAIN ST 0.012 0.009
4Q2021 Nov 16, 2021 2DBP-01 400 SCHEMMEL LN 0.006 0.005 0.006
4Q2021 Nov 16, 2021 2DBP-02 879 W MAIN ST 0.010 0.012 0.006
3Q2021 Aug 17, 2021 2DBP-01 400 SCHEMMEL LN 0.008 0.007 0.004 0.005
3Q2021 Aug 17, 2021 2DBP-02 879 W MAIN ST 0.009 0.010 0.006 0.007
2Q2021 May 12, 2021 2DBP-01 400 SCHEMMEL LN 0.007 0.007 0.002 0.003
2Q2021 May 12, 2021 2DBP-02 879 W MAIN ST 0.006 0.007 0.004 0.006
1Q2021 Mar 30, 2021 2DBP-01 400 SCHEMMEL LN 0.007 0.006 0.001 0.002
1Q2021 Mar 31, 2021 2DBP-02 879 W MAIN ST 0.004 0.004 0 0
4Q2020 Oct 21, 2020 2DBP-01 400 SCHEMMEL LN 0.008 0.010 0.002 0.002
3Q2020 2DBP-01 400 SCHEMMEL LN 0.005 0
2Q2020 Apr 06, 2020 2DBP-01 400 SCHEMMEL LN 0.005 0.005 0 0
1Q2020 2DBP-01 400 SCHEMMEL LN
4Q2014 Oct 15, 2014 2DBP-01 400 SCHEMMEL LN 0.006 0.006 0.004 0.006
4Q2014 Oct 15, 2014 2DBP-02 879 W MAIN ST 0.008 0.009 0.009 0.010
3Q2014 Jul 22, 2014 2DBP-01 400 SCHEMMEL LN 0.005 0.005 0.003 0.003
3Q2014 Jul 22, 2014 2DBP-02 879 W MAIN ST 0.007 0.008 0.009 0.009
2Q2014 Apr 15, 2014 2DBP-01 400 SCHEMMEL LN 0.003 0.005 0.002 0.003
2Q2014 Apr 15, 2014 2DBP-02 879 W MAIN ST 0.004 0.007 0.006 0.009
1Q2014 Feb 18, 2014 2DBP-01 400 SCHEMMEL LN 0.001 0
1Q2014 Feb 18, 2014 2DBP-02 879 W MAIN ST 0.002 0.002
4Q2013 2DBP-01 400 SCHEMMEL LN
4Q2013 2DBP-02 879 W MAIN ST



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