OHA Drinking Water Services
OR41
PWS ID: 00798 ---- SEAL ROCK WATER DISTRICT
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
4Q2023 Dec 21, 2023 2DBP-01 1801 NW CANAL ST 0.056 0.068 0.038 0.047
4Q2023 Dec 21, 2023 2DBP-02 540 SE 123RD ST 0.054 0.053 0.034 0.030
3Q2023 Sep 13, 2023 2DBP-01 1801 NW CANAL ST 0.041 0.052 0.025 0.034
3Q2023 Sep 13, 2023 2DBP-02 540 SE 123RD ST 0.047 0.059 0.030 0.040
2Q2023 Jun 07, 2023 2DBP-01 1801 NW CANAL ST 0.032 0.035 0.019 0.021
2Q2023 Jun 07, 2023 2DBP-02 540 SE 123RD ST 0.038 0.037 0.023 0.023
1Q2023 Mar 01, 2023 2DBP-01 1801 NW CANAL ST 0.028 0.030 0.015 0.018
1Q2023 Mar 01, 2023 2DBP-02 540 SE 123RD ST 0.039 0.044 0.023 0.028
4Q2022 Nov 30, 2022 2DBP-01 1801 NW CANAL ST 0.020 0.020 0.007 0.007
4Q2022 Nov 30, 2022 2DBP-02 540 SE 123RD ST 0.023 0.023 0.008 0.008
3Q2014 Sep 03, 2014 2DBP-01 1801 NW CANAL ST 0.019 0.023 0.005 0.008
3Q2014 Sep 03, 2014 2DBP-02 540 SE 123RD ST 0.017 0.021 0.005 0.008
2Q2014 Jun 04, 2014 2DBP-01 1801 NW CANAL ST 0.011 0.014 0.002 0.004
2Q2014 Jun 04, 2014 2DBP-02 540 SE 123RD ST 0.010 0.013 0.003 0.004
1Q2014 Mar 05, 2014 2DBP-01 1801 NW CANAL ST 0.007 0
1Q2014 Mar 05, 2014 2DBP-02 540 SE 123RD ST 0.007 0.001
4Q2013 Dec 04, 2013 2DBP-01 1801 NW CANAL ST 0.004 0
4Q2013 Dec 04, 2013 2DBP-02 540 SE 123RD ST 0.003 0




More information for this water system: SDWIS ID 4072
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