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Provincial Water Quality Monitoring Network

Ontario’s provincial water quality monitoring network collects surface water quality information from streams at locations across Ontario. The network has 390 monitoring stations operated in partnership with 30 conservation authorities.

Map of network

The conservation authorities take water samples and readings of water quality at the monitoring locations using portable, hand-held equipment. MOE analyses, interprets and manages the data.

The standard set of water quality indicators monitored at each PWQMN station includes chloride, nutrients, suspended solids, trace metals and other general chemistry parameters. Other substances such as pesticides and other contaminants are monitored in detailed water quality surveys in priority watersheds.

PWQMN information is used to assess source water quality, determine the location and causes of water quality problems and measure the effectiveness of pollution control and water management programs. PWQMN information is one of the main sources of surface water information required in source protection planning. Information is also used by the ministry to evaluate applications for certificates of approval and permits to take water and to develop water quality standards.

CONTACT INFORMATION

Aaron Todd
Surface Water Scientist
E-mail: Aaron.Todd@ene.gov.on.ca
Telephone: 416-235-6240

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If you are having difficulty accessing a document, please contact the Ministry of the Environment at picemail@ene.gov.on.ca or phone the ministry's Public Information Centre at 1- 800-565-4923, in Toronto 416-325-4000 or by mail to the Ministry of the Environment, Public Information Centre, 135 St. Clair Ave. West, 1st Floor, Toronto, ON. M4V 1P5.

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