OHA Drinking Water Services
OR41
PWS ID: 00587 ---- ONTARIO, 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 Jan 02, 2024 2DBP-01 SITE 1- WWTP 0.049 0.046 0.024 0.025
1Q2024 Jan 02, 2024 2DBP-02 SITE 2 - MOTEL 6 (#10) 0.035 0.031 0.019 0.018
1Q2024 Jan 29, 2024 2DBP-03 SITE 3 - HEINZ (#11) 0.032 0.028 0.015 0.014
1Q2024 Jan 02, 2024 2DBP-04 SITE 4 -SRCI (#19) 0.059 0.055 0.024 0.023
4Q2023 Oct 04, 2023 2DBP-01 SITE 1- WWTP 0.050 0.056 0.024 0.026
4Q2023 Oct 04, 2023 2DBP-02 SITE 2 - MOTEL 6 (#10) 0.037 0.040 0.019 0.020
4Q2023 Oct 04, 2023 2DBP-03 SITE 3 - HEINZ (#11) 0.035 0.037 0.015 0.015
4Q2023 Oct 04, 2023 2DBP-04 SITE 4 -SRCI (#19) 0.059 0.069 0.024 0.025
3Q2023 Jul 31, 2023 2DBP-01 SITE 1- WWTP 0.053 0.055 0.027 0.032
3Q2023 Jul 31, 2023 2DBP-02 SITE 2 - MOTEL 6 (#10) 0.039 0.040 0.020 0.027
3Q2023 Jul 31, 2023 2DBP-03 SITE 3 - HEINZ (#11) 0.036 0.039 0.017 0.022
3Q2023 Jul 31, 2023 2DBP-04 SITE 4 -SRCI (#19) 0.058 0.063 0.026 0.030
2Q2023 Apr 05, 2023 2DBP-01 SITE 1- WWTP 0.058 0.043 0.022 0.017
2Q2023 Apr 05, 2023 2DBP-02 SITE 2 - MOTEL 6 (#10) 0.046 0.035 0.019 0.012
2Q2023 Apr 05, 2023 2DBP-03 SITE 3 - HEINZ (#11) 0.042 0.032 0.018 0.011
2Q2023 Apr 05, 2023 2DBP-04 SITE 4 -SRCI (#19) 0.058 0.046 0.025 0.020
1Q2023 Jan 04, 2023 2DBP-01 SITE 1- WWTP 0.060 0.057 0.025 0.022
1Q2023 Jan 04, 2023 2DBP-02 SITE 2 - MOTEL 6 (#10) 0.044 0.044 0.020 0.019
1Q2023 Jan 04, 2023 2DBP-03 SITE 3 - HEINZ (#11) 0.045 0.040 0.019 0.017
1Q2023 Jan 04, 2023 2DBP-04 SITE 4 -SRCI (#19) 0.053 0.055 0.026 0.023
4Q2022 Oct 05, 2022 2DBP-01 SITE 1- WWTP 0.057 0.068 0.022 0.029
4Q2022 Oct 05, 2022 2DBP-02 SITE 2 - MOTEL 6 (#10) 0.042 0.049 0.018 0.022
4Q2022 Oct 05, 2022 2DBP-03 SITE 3 - HEINZ (#11) 0.043 0.049 0.017 0.021
4Q2022 Oct 05, 2022 2DBP-04 SITE 4 -SRCI (#19) 0.052 0.062 0.027 0.030
3Q2022 Jul 05, 2022 2DBP-01 SITE 1- WWTP 0.056 0.064 0.024 0.022
3Q2022 Jul 05, 2022 2DBP-02 SITE 2 - MOTEL 6 (#10) 0.042 0.051 0.021 0.023
3Q2022 Jul 05, 2022 2DBP-03 SITE 3 - HEINZ (#11) 0.041 0.051 0.019 0.023
3Q2022 Jul 05, 2022 2DBP-04 SITE 4 -SRCI (#19) 0.052 0.059 0.027 0.029
2Q2022 Apr 05, 2022 2DBP-01 SITE 1- WWTP 0.057 0.043 0.030 0.022
2Q2022 Apr 05, 2022 2DBP-02 SITE 2 - MOTEL 6 (#10) 0.042 0.029 0.024 0.016
2Q2022 Apr 05, 2022 2DBP-03 SITE 3 - HEINZ (#11) 0.042 0.035 0.021 0.013
2Q2022 Apr 05, 2022 2DBP-04 SITE 4 -SRCI (#19) 0.055 0.035 0.031 0.024
1Q2022 Jan 04, 2022 2DBP-01 SITE 1- WWTP 0.056 0.051 0.028 0.032
1Q2022 Jan 04, 2022 2DBP-02 SITE 2 - MOTEL 6 (#10) 0.043 0.040 0.024 0.027
1Q2022 Jan 04, 2022 2DBP-03 SITE 3 - HEINZ (#11) 0.036 0.033 0.021 0.023
1Q2022 Jan 04, 2022 2DBP-04 SITE 4 -SRCI (#19) 0.061 0.056 0.031 0.029
4Q2021 Oct 05, 2021 2DBP-01 SITE 1- WWTP 0.060 0.068 0.032 0.038
4Q2021 Oct 05, 2021 2DBP-02 SITE 2 - MOTEL 6 (#10) 0.045 0.049 0.027 0.032
4Q2021 Oct 05, 2021 2DBP-03 SITE 3 - HEINZ (#11) 0.039 0.042 0.024 0.028
4Q2021 Oct 05, 2021 2DBP-04 SITE 4 -SRCI (#19) 0.062 0.071 0.031 0.034
3Q2021 Jul 06, 2021 2DBP-01 SITE 1- WWTP 0.058 0.067 0.031 0.037
3Q2021 Jul 06, 2021 2DBP-02 SITE 2 - MOTEL 6 (#10) 0.043 0.053 0.024 0.033
3Q2021 Jul 06, 2021 2DBP-03 SITE 3 - HEINZ (#11) 0.039 0.049 0.022 0.029
3Q2021 Jul 06, 2021 2DBP-04 SITE 4 -SRCI (#19) 0.064 0.072 0.032 0.037
2Q2021 Apr 08, 2021 2DBP-01 SITE 1- WWTP 0.054 0.044 0.025 0.022
2Q2021 Apr 08, 2021 2DBP-02 SITE 2 - MOTEL 6 (#10) 0.039 0.032 0.019 0.015
2Q2021 Apr 08, 2021 2DBP-03 SITE 3 - HEINZ (#11) 0.036 0.027 0.019 0.015
2Q2021 Apr 08, 2021 2DBP-04 SITE 4 -SRCI (#19) 0.059 0.050 0.026 0.024
1Q2021 Jan 05, 2021 2DBP-01 SITE 1- WWTP 0.052 0.052 0.024 0.024
1Q2021 Jan 05, 2021 2DBP-02 SITE 2 - MOTEL 6 (#10) 0.038 0.038 0.018 0.018
1Q2021 Jan 05, 2021 2DBP-03 SITE 3 - HEINZ (#11) 0.035 0.036 0.017 0.018
1Q2021 Jan 05, 2021 2DBP-04 SITE 4 -SRCI (#19) 0.055 0.055 0.024 0.024
4Q2020 Oct 01, 2020 2DBP-01 SITE 1- WWTP 0.050 0.058 0.023 0.028
4Q2020 Oct 01, 2020 2DBP-02 SITE 2 - MOTEL 6 (#10) 0.037 0.041 0.017 0.019
4Q2020 Oct 01, 2020 2DBP-03 SITE 3 - HEINZ (#11) 0.034 0.038 0.014 0.018
4Q2020 Oct 01, 2020 2DBP-04 SITE 4 -SRCI (#19) 0.055 0.066 0.024 0.028
3Q2020 Jul 01, 2020 2DBP-01 SITE 1- WWTP 0.049 0.056 0.020 0.022
3Q2020 Jul 01, 2020 2DBP-02 SITE 2 - MOTEL 6 (#10) 0.039 0.043 0.017 0.020
3Q2020 Jul 01, 2020 2DBP-03 SITE 3 - HEINZ (#11) 0.036 0.040 0.014 0.017
3Q2020 Jul 01, 2020 2DBP-04 SITE 4 -SRCI (#19) 0.057 0.057 0.021 0.023
2Q2020 Apr 01, 2020 2DBP-01 SITE 1- WWTP 0.047 0.036 0.021 0.016
2Q2020 Apr 01, 2020 2DBP-02 SITE 2 - MOTEL 6 (#10) 0.042 0.031 0.020 0.012
2Q2020 Apr 01, 2020 2DBP-03 SITE 3 - HEINZ (#11) 0.035 0.026 0.013 0.009
2Q2020 Apr 01, 2020 2DBP-04 SITE 4 -SRCI (#19) 0.055 0.044 0.022 0.018
1Q2020 Jan 02, 2020 2DBP-01 SITE 1- WWTP 0.050 0.046 0.020 0.020
1Q2020 Jan 02, 2020 2DBP-02 SITE 2 - MOTEL 6 (#10) 0.044 0.042 0.020 0.020
1Q2020 Jan 02, 2020 2DBP-03 SITE 3 - HEINZ (#11) 0.037 0.035 0.013 0.012
1Q2020 Jan 02, 2020 2DBP-04 SITE 4 -SRCI (#19) 0.058 0.055 0.021 0.021
4Q2019 Oct 02, 2019 2DBP-01 SITE 1- WWTP 0.050 0.057 0.020 0.023
4Q2019 Oct 02, 2019 2DBP-02 SITE 2 - MOTEL 6 (#10) 0.044 0.049 0.020 0.022
4Q2019 Oct 02, 2019 2DBP-03 SITE 3 - HEINZ (#11) 0.037 0.042 0.017 0.016
4Q2019 Oct 02, 2019 2DBP-04 SITE 4 -SRCI (#19) 0.059 0.071 0.021 0.023
3Q2019 Jul 01, 2019 2DBP-01 SITE 1- WWTP 0.048 0.056 0.021 0.023
3Q2019 Jul 31, 2019 2DBP-02 SITE 2 - MOTEL 6 (#10) 0.041 0.051 0.020 0.026
3Q2019 Jul 01, 2019 2DBP-03 SITE 3 - HEINZ (#11) 0.034 0.042 0.017 0.020
3Q2019 Jul 01, 2019 2DBP-04 SITE 4 -SRCI (#19) 0.055 0.057 0.021 0.023
2Q2019 Apr 03, 2019 2DBP-01 SITE 1- WWTP 0.046 0.039 0.019 0.015
2Q2019 Apr 03, 2019 2DBP-02 SITE 2 - MOTEL 6 (#10) 0.034 0.031 0.014 0.012
2Q2019 Apr 03, 2019 2DBP-03 SITE 3 - HEINZ (#11) 0.029 0.026 0.015 0.013
2Q2019 Apr 03, 2019 2DBP-04 SITE 4 -SRCI (#19) 0.054 0.047 0.019 0.015
1Q2019 Jan 02, 2019 2DBP-01 SITE 1- WWTP 0.043 0.041 0.022 0.019
1Q2019 Jan 02, 2019 2DBP-02 SITE 2 - MOTEL 6 (#10) 0.033 0.032 0.017 0.015
1Q2019 Jan 02, 2019 2DBP-03 SITE 3 - HEINZ (#11) 0.028 0.026 0.017 0.018
1Q2019 Jan 02, 2019 2DBP-04 SITE 4 -SRCI (#19) 0.052 0.052 0.021 0.019
4Q2018 Oct 03, 2018 2DBP-01 SITE 1- WWTP 0.045 0.049 0.023 0.025
4Q2018 Oct 03, 2018 2DBP-02 SITE 2 - MOTEL 6 (#10) 0.033 0.035 0.018 0.018
4Q2018 Oct 03, 2018 2DBP-03 SITE 3 - HEINZ (#11) 0.028 0.030 0.014 0.016
4Q2018 Oct 03, 2018 2DBP-04 SITE 4 -SRCI (#19) 0.051 0.059 0.021 0.023
3Q2018 Jul 17, 2018 2DBP-01 SITE 1- WWTP 0.045 0.050 0.022 0.023
3Q2018 Jul 17, 2018 2DBP-02 SITE 2 - MOTEL 6 (#10) 0.034 0.037 0.018 0.018
3Q2018 Jul 17, 2018 2DBP-03 SITE 3 - HEINZ (#11) 0.030 0.032 0.015 0.015
3Q2018 Jul 17, 2018 2DBP-04 SITE 4 -SRCI (#19) 0.050 0.053 0.021 0.022
2Q2018 Apr 02, 2018 2DBP-01 SITE 1- WWTP 0.048 0.037 0.027 0.022
2Q2018 Apr 02, 2018 2DBP-02 SITE 2 - MOTEL 6 (#10) 0.041 0.030 0.024 0.017
2Q2018 Apr 02, 2018 2DBP-03 SITE 3 - HEINZ (#11) 0.039 0.026 0.021 0.015
2Q2018 Apr 02, 2018 2DBP-04 SITE 4 -SRCI (#19) 0.053 0.041 0.027 0.020
1Q2018 Jan 04, 2018 2DBP-01 SITE 1- WWTP 0.051 0.048 0.029 0.026
1Q2018 Jan 03, 2018 2DBP-02 SITE 2 - MOTEL 6 (#10) 0.042 0.041 0.024 0.022
1Q2018 Jan 03, 2018 2DBP-03 SITE 3 - HEINZ (#11) 0.041 0.037 0.023 0.019
1Q2018 Jan 03, 2018 2DBP-04 SITE 4 -SRCI (#19) 0.054 0.051 0.029 0.026
4Q2017 Oct 04, 2017 2DBP-01 SITE 1- WWTP 0.050 0.055 0.028 0.030
4Q2017 Oct 04, 2017 2DBP-02 SITE 2 - MOTEL 6 (#10) 0.042 0.045 0.024 0.024
4Q2017 Oct 04, 2017 2DBP-03 SITE 3 - HEINZ (#11) 0.042 0.044 0.024 0.025
4Q2017 Oct 04, 2017 2DBP-04 SITE 4 -SRCI (#19) 0.055 0.061 0.029 0.031
3Q2017 Jul 06, 2017 2DBP-01 SITE 1- WWTP 0.056 0.057 0.030 0.033
3Q2017 Jul 06, 2017 2DBP-02 SITE 2 - MOTEL 6 (#10) 0.044 0.052 0.024 0.030
3Q2017 Jul 06, 2017 2DBP-03 SITE 3 - HEINZ (#11) 0.043 0.052 0.024 0.030
3Q2017 Jul 06, 2017 2DBP-04 SITE 4 -SRCI (#19) 0.058 0.061 0.029 0.035
2Q2017 Apr 05, 2017 2DBP-01 SITE 1- WWTP 0.053 0.048 0.029 0.026
2Q2017 Apr 05, 2017 2DBP-02 SITE 2 - MOTEL 6 (#10) 0.039 0.033 0.023 0.018
2Q2017 Apr 05, 2017 2DBP-03 SITE 3 - HEINZ (#11) 0.038 0.033 0.022 0.019
2Q2017 Apr 05, 2017 2DBP-04 SITE 4 -SRCI (#19) 0.057 0.048 0.025 0.024
1Q2017 Jan 05, 2017 2DBP-01 SITE 1- WWTP 0.054 0.049 0.027 0.025
1Q2017 Jan 05, 2017 2DBP-02 SITE 2 - MOTEL 6 (#10) 0.039 0.038 0.021 0.021
1Q2017 Jan 05, 2017 2DBP-03 SITE 3 - HEINZ (#11) 0.036 0.035 0.019 0.019
1Q2017 Jan 05, 2017 2DBP-04 SITE 4 -SRCI (#19) 0.059 0.056 0.023 0.022
4Q2016 Oct 05, 2016 2DBP-01 SITE 1- WWTP 0.053 0.065 0.026 0.032
4Q2016 Oct 05, 2016 2DBP-02 SITE 2 - MOTEL 6 (#10) 0.039 0.043 0.020 0.023
4Q2016 Oct 05, 2016 2DBP-03 SITE 3 - HEINZ (#11) 0.035 0.039 0.018 0.020
4Q2016 Oct 05, 2016 2DBP-04 SITE 4 -SRCI (#19) 0.060 0.068 0.022 0.025
3Q2016 Jul 06, 2016 2DBP-01 SITE 1- WWTP 0.049 0.052 0.022 0.028
3Q2016 Jul 06, 2016 2DBP-02 SITE 2 - MOTEL 6 (#10) 0.038 0.043 0.018 0.025
3Q2016 Jul 06, 2016 2DBP-03 SITE 3 - HEINZ (#11) 0.033 0.039 0.016 0.022
3Q2016 Jul 06, 2016 2DBP-04 SITE 4 -SRCI (#19) 0.057 0.063 0.020 0.023
2Q2016 Apr 07, 2016 2DBP-01 SITE 1- WWTP 0.043 0.045 0.015 0.017
2Q2016 Apr 07, 2016 2DBP-02 SITE 2 - MOTEL 6 (#10) 0.032 0.032 0.011 0.012
2Q2016 Apr 07, 2016 2DBP-03 SITE 3 - HEINZ (#11) 0.027 0.027 0.010 0.011
2Q2016 Apr 07, 2016 2DBP-04 SITE 4 -SRCI (#19) 0.049 0.049 0.016 0.017
1Q2016 Jan 06, 2016 2DBP-01 SITE 1- WWTP 0.042 0.036 0.015 0.010
1Q2016 Jan 06, 2016 2DBP-02 SITE 2 - MOTEL 6 (#10) 0.033 0.030 0.011 0.009
1Q2016 Jan 06, 2016 2DBP-03 SITE 3 - HEINZ (#11) 0.030 0.026 0.011 0.007
1Q2016 Jan 06, 2016 2DBP-04 SITE 4 -SRCI (#19) 0.048 0.046 0.016 0.014
4Q2015 Oct 07, 2015 2DBP-01 SITE 1- WWTP 0.042 0.051 0.014 0.018
4Q2015 Oct 07, 2015 2DBP-02 SITE 2 - MOTEL 6 (#10) 0.031 0.035 0.009 0.012
4Q2015 Oct 07, 2015 2DBP-03 SITE 3 - HEINZ (#11) 0.030 0.033 0.009 0.011
4Q2015 Oct 07, 2015 2DBP-04 SITE 4 -SRCI (#19) 0.045 0.054 0.013 0.016
3Q2015 2DBP-01 SITE 1- WWTP 0.043 0.017
3Q2015 2DBP-02 SITE 2 - MOTEL 6 (#10) 0.029 0.008
3Q2015 2DBP-03 SITE 3 - HEINZ (#11) 0.029 0.008
3Q2015 2DBP-04 SITE 4 -SRCI (#19) 0.042 0.017
2Q2015 Apr 15, 2015 2DBP-01 SITE 1- WWTP 0.052 0.044 0.022 0.018
2Q2015 Apr 15, 2015 2DBP-02 SITE 2 - MOTEL 6 (#10) 0.039 0.030 0.016 0.010
2Q2015 Apr 15, 2015 2DBP-03 SITE 3 - HEINZ (#11) 0.039 0.030 0.013 0.011
2Q2015 Apr 15, 2015 2DBP-04 SITE 4 -SRCI (#19) 0.051 0.043 0.021 0.018
1Q2015 Jan 21, 2015 2DBP-01 SITE 1- WWTP 0.057 0.046 0.029 0.018
1Q2015 Jan 21, 2015 2DBP-02 SITE 2 - MOTEL 6 (#10) 0.043 0.035 0.020 0.015
1Q2015 Jan 21, 2015 2DBP-03 SITE 3 - HEINZ (#11) 0.042 0.036 0.017 0.012
1Q2015 Jan 21, 2015 2DBP-04 SITE 4 -SRCI (#19) 0.057 0.048 0.027 0.017
4Q2014 Oct 28, 2014 2DBP-01 SITE 1- WWTP 0.058 0.064 0.032 0.034
4Q2014 Oct 28, 2014 2DBP-02 SITE 2 - MOTEL 6 (#10) 0.044 0.045 0.023 0.022
4Q2014 Oct 28, 2014 2DBP-03 SITE 3 - HEINZ (#11) 0.041 0.043 0.020 0.019
4Q2014 Oct 28, 2014 2DBP-04 SITE 4 -SRCI (#19) 0.059 0.062 0.030 0.033
3Q2014 Jul 24, 2014 2DBP-01 SITE 1- WWTP 0.061 0.065 0.029 0.035
3Q2014 Jul 24, 2014 2DBP-02 SITE 2 - MOTEL 6 (#10) 0.051 0.054 0.027 0.030
3Q2014 Jul 24, 2014 2DBP-03 SITE 3 - HEINZ (#11) 0.043 0.052 0.022 0.025
3Q2014 Jul 24, 2014 2DBP-04 SITE 4 -SRCI (#19) 0.060 0.066 0.030 0.032
2Q2014 Jun 02, 2014 2DBP-01 SITE 1- WWTP 0.042 0.058 0.019 0.031
2Q2014 Jun 02, 2014 2DBP-02 SITE 2 - MOTEL 6 (#10) 0.034 0.047 0.018 0.027
2Q2014 Jun 02, 2014 2DBP-03 SITE 3 - HEINZ (#11) 0.025 0.038 0.015 0.023
2Q2014 Jun 02, 2014 2DBP-04 SITE 4 -SRCI (#19) 0.041 0.058 0.021 0.032
1Q2014 Jan 22, 2014 2DBP-01 SITE 1- WWTP 0.025 0.008
1Q2014 Jan 22, 2014 2DBP-02 SITE 2 - MOTEL 6 (#10) 0.021 0.009
1Q2014 Jan 22, 2014 2DBP-03 SITE 3 - HEINZ (#11) 0.013 0.007
1Q2014 Jan 22, 2014 2DBP-04 SITE 4 -SRCI (#19) 0.023 0.011
4Q2013 Oct 22, 2013 2DBP-01 SITE 1- WWTP 0.017 0.004
4Q2013 Oct 22, 2013 2DBP-02 SITE 2 - MOTEL 6 (#10) 0.015 0.006
4Q2013 Oct 22, 2013 2DBP-03 SITE 3 - HEINZ (#11) 0.008 0.004
4Q2013 Oct 22, 2013 2DBP-04 SITE 4 -SRCI (#19) 0.014 0.006




More information for this water system: SDWIS ID 3898
System Info  ::  Report for Lenders  ::  Alerts  ::  Violations  ::  Compliance & Enforcement  ::  Contacts & Advisories  ::  Site Visits  ::  Public Notice
Coliform Summary  ::  Coliform Results  ::  Coliform Schedules  ::  LT2  ::  GW/GWUDI Source Details  ::  Plan Review  ::  Annual Fee
Chemical Summary  ::  Chemical Results  ::  Chemical Schedules  ::  Chemical Schedule Summary  ::  Arsenic RAA  ::  Cyanotoxins  ::  PFAS
Lead & Copper  ::  Corrosion Control (LCR)  ::  DBP Sample Sites  ::  FANLs  ::  MRDL  ::  GWR 4-Log  ::  Turbidity  ::  SWTR  ::  LRAA
Something missing? The new Chemical Results page replaces many pages, including arsenic and nitrate.

Information for all water systems:
Water System Inventory  ::  Water System Surveys  ::  Outstanding Performers  ::  Treatment Plant Inspections  ::  Treatment  ::  Plan Reviews
Alerts  ::  Violations  ::  Compliance & Enforcement  ::  Deficiencies  ::  System Scores  ::  Exceedances  ::  Public Notices  ::  Service Lines
Water Advisories  ::  Contact Reports  ::  Cyanotoxins  ::  PFAS  ::  Post-wildfire VOCs  ::  Fluoride  ::  Certification List

Introduction  ::  Data Search Options  ::  Water System Search  ::  DWS Home  ::  DWS Rules

Need help? Email Drinking Water Services for assistance.Staff/Partner Login