Ontario: Several Changes to Water Related Regulations
Ontario has published several amendments related to drinking water quality standards, lead in schools and day nurseries: drinking water systems; drinking water testing services; and drinking water operator certification. Changes are summarized below
- changes to Ontario’s Drinking Water Quality Standards will include the introduction of three new drinking water quality standards based on new federal guidelines: 0.06 mg/L for Toluene; 0.14 mg/L for Ethylbenzene; and 0.09 mg/L for Total Xylenes. Two drinking water quality standards will be revised: - from 0.01 mg/L to 0.05 mg/L for Selenium; and from 0.03 mg/L to 0.01 mg/L for Tetrachloroethylene. One drinking water standard, (10 mg/L for Nitrate Nitrite) will be removed. Under changes to the ministry’s Technical Support Document, one new Aesthetic Objective will be introduced: (0.015 mg/L for methyl t-butyl ether [MTBE]); and two Aesthetic Objectives – for ethylbenzene and xylenes will be revised.
- changes will be made to: lead sampling requirements; flushing requirements for fountains and taps; using filters or other devices for lead removal; changes to reduced lead sampling; and corrective action.
- All pesticides found at levels above 100 nanograms/Litre (ng/L) will initiate an Adverse Water Quality Incident (or AWQI). All test results that indicate the presence of pesticides – even if their concentration levels are at or below the threshold of 100 ng/L – will need to be provided to the ministry.
- laboratories, among other things, will need to submit drinking water test results to the ministry more quickly, within ten days (reduced from current 28 days).
- requirements for Drinking Water Operator-in-Training (OIT) Certification have been updated.