OHA Drinking Water Services
OR41
PWS ID: 94946 ---- GUIDE DOGS FOR THE BLIND INC
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
3Q2025 2DBP-01 STUDENT BREAKROOM 0.053 0.007
2Q2025 Apr 30, 2025 2DBP-01 STUDENT BREAKROOM 0.055 0.065 0.008 0.009
1Q2025 2DBP-01 STUDENT BREAKROOM 0.045 0.007
4Q2024 Nov 15, 2024 2DBP-01 STUDENT BREAKROOM 0.045 0.047 0.007 0.007
3Q2024 Aug 29, 2024 2DBP-01 STUDENT BREAKROOM 0.045 0.042 0.008 0.007
2Q2024 Jun 03, 2024 2DBP-01 STUDENT BREAKROOM 0.046 0.045 0.007 0.008
1Q2024 Feb 26, 2024 2DBP-01 STUDENT BREAKROOM 0.049 0.047 0.007 0.008
4Q2023 Dec 01, 2023 2DBP-01 STUDENT BREAKROOM 0.052 0.050 0.007 0.007
3Q2023 Aug 09, 2023 2DBP-01 STUDENT BREAKROOM 0.049 0.050 0.007 0.006
2Q2023 Jun 14, 2023 2DBP-01 STUDENT BREAKROOM 0.050 0.051 0.007 0.007
1Q2023 Feb 10, 2023 2DBP-01 STUDENT BREAKROOM 0.049 0.051 0.007 0.007
4Q2022 Oct 26, 2022 2DBP-01 STUDENT BREAKROOM 0.041 0.041 0.007 0.007



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