OHA Drinking Water Services
OR41
PWS ID: 00239 ---- LONDON WATER CO-OP
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
4Q2021 Dec 06, 2021 2DBP-01 72785 LONDON ROAD 0.033 0.037 0.013 0.011
3Q2021 Jul 05, 2021 2DBP-01 72785 LONDON ROAD 0.027 0.036 0.013 0.021
2Q2021 2DBP-01 72785 LONDON ROAD 0.019 0.008
1Q2021 Mar 01, 2021 2DBP-01 72785 LONDON ROAD 0.019 0.020 0.008 0.011
4Q2020 Dec 30, 2020 2DBP-01 72785 LONDON ROAD 0.017 0.017 0 0