OHA Drinking Water Services
OR41
PWS ID: 00610 ---- TIERRA DEL MAR WATER CO
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
2Q2021 Jun 15, 2021 2DBP-01 WHALEN - WHALEN ISLAND PARK 0.052 0.046 0.022 0.014
2Q2021 Jun 15, 2021 2DBP-02 NORTH - 24840 SANDLAKE RD 0.050 0.046 0.025 0.017
1Q2021 Mar 10, 2021 2DBP-01 WHALEN - WHALEN ISLAND PARK 0.058 0.046 0.023 0.018
1Q2021 Mar 10, 2021 2DBP-02 NORTH - 24840 SANDLAKE RD 0.051 0.043 0.025 0.020
4Q2020 2DBP-01 WHALEN - WHALEN ISLAND PARK 0.062 0.025
4Q2020 2DBP-02 NORTH - 24840 SANDLAKE RD 0.062 0.031
3Q2020 Sep 24, 2020 2DBP-01 WHALEN - WHALEN ISLAND PARK 0.062 0.064 0.027 0.029
3Q2020 Sep 24, 2020 2DBP-02 NORTH - 24840 SANDLAKE RD 0.064 0.063 0.032 0.034
2Q2020 Jun 16, 2020 2DBP-01 WHALEN - WHALEN ISLAND PARK 0.060 0.062 0.023 0.022
2Q2020 Jun 16, 2020 2DBP-02 NORTH - 24840 SANDLAKE RD 0.064 0.063 0.028 0.026
1Q2020 Mar 17, 2020 2DBP-01 WHALEN - WHALEN ISLAND PARK 0.055 0.053 0.024 0.021
1Q2020 Mar 17, 2020 2DBP-02 NORTH - 24840 SANDLAKE RD 0.067 0.066 0.032 0.030
4Q2019 Dec 03, 2019 2DBP-01 WHALEN - WHALEN ISLAND PARK 0.063 0.063 0.034 0.034
4Q2019 Dec 03, 2019 2DBP-02 NORTH - 24840 SANDLAKE RD 0.070 0.070 0.038 0.038