CHEMICAL SAMPLING & TESTING

c h e m i c a l SAMPLING & TESTING

O.Reg 170/04, Schedule 13 provides the requirements for sample collection and testing for a variety of chemical components in drinking water. Additionally, it lists the Maximum Acceptable Concentration (MAC) for each component. The requirements are outlined below, along with the status of Windsor's sampling program.

inorganics

One sample must be collected and tested every 12 months if the source is surface water and tested for every parameter set out in Schedule 23. (See page 10 for Table 13.2)

In 2019, ENWIN, on behalf of WUC, collected and tested samples for every parameter set out in Schedule 23 on a quarterly basis.

lead

One sample must be collected and tested every 12 months for Lead. (See page 10 for Table 13.2)

ENWIN, on behalf of WUC, collected samples and tested for lead in a treated water sample and a distribution sample on a quarterly basis.

nitrates and nitrites

The owner of a drinking water system (WUC) and the operating authority for the system (ENWIN) must ensure that at least one water sample is taken every three months and tested for nitrate and nitrite. (See page 10 for Table 13.2)

ENWIN, on behalf of WUC, collected samples and tested for nitrates and nitrites on a quarterly basis.

sodium

Schedule 13 stipulates that at least one water sample is taken every 60 months and tested for sodium. (See page 10 for Table 13.2)

ENWIN, on behalf of WUC, last collected and sampled for sodium on January 23, 2019.

organics

One sample must be collected and tested every 12 months, if the source is surface water, and tested for every parameter set out in Schedule 24. (See page 11 for Table 13.3)

During 2019, on behalf of WUC, ENWIN collected samples and tested for every parameter set out in Schedule 24 on a quarterly basis.

trihalomethane (thm's)

For any system that provides chlorination, one distribution sample will be collected and tested for trihalomethanes every three months. (See page 11 for Table 13.3)

ENWIN, on behalf of WUC, collected samples and tested for trihalomethanes on a quarterly basis.

taBle 13.1 - Bromate sample results

Date of legal instrument issued	Parameter	Date Sampled	Result	Unit of Measure
MDWL 025-101	Bromate - Treated	1-Jan-19 to 31-Dec-19	0.003	mg/L
MDWL 025-101	Bromate - Distribution	1-Jan-19 to 31-Dec-19	0.003	mg/L