OHA Drinking Water Services
OR41
PWS ID: 00587 ---- ONTARIO, CITY OF
Cyanotoxin Sample Results
See also: Sample Schedules :: Cyanotoxin Rules & Resources :: Excel Spreadsheet

Raw Water Facilities*:


Finished Water Facilities*:
*Only facilities with cyanotoxin data are listed.
Cyanotoxin Sampling Schedules
  • CH-A2 - 2 Weeks
  • Go to schedule page
    • See purchasers/sellers for this system

    Health Advisory Levels (for entry points and distribution)
  • Total Microcystins: 0.3 ug/L for vulnerable people; 1.6 ug/L for people aged 6 and older.
  • Cylindrospermopsin: 0.7 ug/L for vulnerable people; 3 ug/L for people aged 6 and older.
    • Health advisory level exceedances in entry point and distribution samples are indicated with red text.
    ND = Not detected at the minimum reporting level;  -- = Not sampled 17 results found for selected criteria.
    Sample
    ID    		 Sample
    Date    		 Received
    Date    		 Facility ID Facility Name Raw Water Entry Points and Distribution
    Total Microcystins
    (ug/L)    		 Cylindrospermopsin
    (ug/L)    		 Total Microcystins
    (ug/L)    		 Cylindrospermopsin
    (ug/L)
    2510331-01 10/24/2025 11/04/2025 CH-A2 CH FOR WESTECH PLANTNDND
    2510060-01 10/06/2025 10/10/2025 CH-A2 CH FOR WESTECH PLANTNDND
    2509257-01 09/22/2025 09/26/2025 CH-A2 CH FOR WESTECH PLANTNDND
    2509257-02 09/22/2025 09/26/2025 EP-A EP FOR RIVER, WELLS NDND
    2509215-01 09/15/2025 11/04/2025 CH-A2 CH FOR WESTECH PLANTNDND
    2509215-02 09/15/2025 11/04/2025 EP-A EP FOR RIVER, WELLS NDND
    2509215-03 09/11/2025 11/04/2025 EP-A EP FOR RIVER, WELLS NDND
    2509087-01 09/08/2025 09/11/2025 CH-A2 CH FOR WESTECH PLANT--ND
    2509087-01RE1 09/08/2025 09/11/2025 CH-A2 CH FOR WESTECH PLANT0.28--
    1810266-01 10/22/2018 10/26/2018 SRC-AA SNAKE RIVERNDND
    1810099-01 10/08/2018 10/12/2018 SRC-AA SNAKE RIVERNDND
    1809247-01 09/24/2018 09/28/2018 SRC-AA SNAKE RIVERNDND
    1809081-01 09/10/2018 09/18/2018 SRC-AA SNAKE RIVERNDND
    1808271-01 08/27/2018 08/31/2018 SRC-AA SNAKE RIVERNDND
    1808118-01 08/13/2018 08/24/2018 SRC-AA SNAKE RIVERNDND
    1807233-01 07/30/2018 08/24/2018 SRC-AA SNAKE RIVERNDND
    1807067-01 07/16/2018 08/24/2018 SRC-AA SNAKE RIVERNDND
     



    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  ::  DBP Sample Sites  ::  FANLs  ::  MRDL  ::  GWR 4-Log  ::  Turbidity  ::  SWTR  ::  LRAA  ::  DW Source Protection
    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  ::  DW Source Protection
    Main menu:
    Introduction  ::  Data Search Options  ::  Water System Search  ::  DWS Home  ::  DWS Rules
    Need help? Email Drinking Water Services for assistance.Staff/Partner Login