Part of the Policy Proposal…

Part of the Policy Proposal Notice: states; 'The leaching of contaminants due to corrosion can have both direct and indirect impacts on human health. Lead, the main contaminant of concern, is used to trigger corrosion control programs. The document also outlines steps to implement a monitoring program for assessing corrosion in distribution systems and service lines going into homes and non-residential sites and buildings.' What kind of monitoring program would the regulators suggest ? Iron; not a good indicator since any minor disdurbance in the water main will/could cause slaking or rust etc. (flow changes, maintenance on water mains). Lead; again a poor indicator of a problem since in most water distribution systems the water is constantly flowing. For lead to be at a high enough concentration for us to notice, the water should be still for at least 12 hours. We, as water providers do not want to test private homes for lead, since we would be testing private internal water systems (internal plumbing). In Ontario we are required to test for lead at a minimum of once/year in a large municipal system. We don't expect to see any lead in these samples since the water is flowing constantly (no time for lead to accumulate). Do you monitor for tubidity as your indicator of a distribution problem ? Again, iron can easily be the main culprit for any elevated distribution turbidity. Thank you for allowing my input.

[Original Comment ID: 102060]