Quinte Mohawk School Drinking Water System Sampling Protocol
The Quinte Mohawk School Drinking Water System (DWS) consists of two drilled wells located west of the school and one dug well located southwest of the school. The wells are considered to be potentially Ground Water Under the Direct Influence of Surface Water (GUDI). Treatment consists of ultra-filtration followed by sodium hypochlorite disinfection. This system is a Federally funded and operated school, therefore it does not fall under Provincial legislation, however, the Ontario Clean Water Agency (OCWA) is operating the system as if it is regulated under Ontario Regulation 170/03. Schools and Daycare facilities are considered to be Designated Facilities under this legislation; therefore this system is classified as a Small Non-Municipal Non-Residential System Serving a Designated Facility.
Ontario Regulation 170/03 specifies sampling and monitoring requirements for Small Non-Municipal Non-Residential System serving a Designated Facility as follows:
Microbiological Sampling & Testing:
• One monthly sample for each raw water source to be tested for Total Coliform and E. Coli;
• One bi-weekly distribution sample to be tested for Total Coliforms, E. Coli and HPC.
*OCWA conducts this sampling on a weekly basis due to the system serving a school and a daycare facility.
Operational Sampling & Testing:
• Two distribution samples weekly (at least 48 hours apart) to be tested for free chlorine residual
Chemical Sampling & Testing:
• One treated water sample every three months to be tested for nitrite and nitrate;
• One treated water sample every 60 months to be tested for every parameter listed in Schedules 23* and 24**; and
• One treated water sample every 60 months to be tested for sodium and fluoride.