Welcome to NBMCA.ca
North Bay-Mattawa Conservation Authority
As a community-based, non-profit environmental organization, NBMCA is dedicated to
conserving, restoring, developing and managing renewable natural resources on a watershed basis.
NBMCA is one of 36 Conservation Authorities who are members of Conservation Ontario.
of the Algonquin People and the Metis Nation.
Want to honor a Watershed Champion?
Boardwalk of Champions
Our watershed overflows with champions, people whose actions - big and small - have contributed to the health and well-being of our families, our neighbourhoods, our communities, our environment and our watershed.
Permits
Development and On-site Sewage
Permits are one tool for balancing human needs with the needs
of the natural environment, protecting people and property
from natural hazards.
Science
Integrated Watershed Management
From water quality monitoring and flood forecasting to drinking water source protection, NBMCA uses science to make watershed management decisions.
Get Outside!
Conservation Areas
Looking to hike, bike, or ski?
Paddle a historic canoe route?
Explore our natural heritage?
News
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MoreSnow Survey Results for February 14, 2025
Snow depth increased by 10.0 cm and snow water equivalence by 18.7 mm since January 31 and is considered normal for this time of year at all sites, reports the North Bay-Mattawa Conservation Authority who measures snow depth and water content as part of its Flood Forecasting and Warning Program.
MoreSnow Survey Readings for January 31, 2025
Snow depth increased by 14.0 cm and snow water equivalence by 29.3 mm since January 15 and is considered normal for this time of year at all sites, reports the North Bay-Mattawa Conservation Authority who measures snow depth and water content as part of its Flood Forecasting and Warning Program.
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Notice of Public Consultation Period – Floodplain Mapping
North Bay-Mattawa Conservation Authority (NBMCA), in partnership with the Province of Ontario, City of North Bay and the Municipality of Callander, has recently completed new and updated floodplain mapping. The public consultation period runs from January 20 to February 20, 2025.
MorePositions available on Source Protection Committee
Interested individuals are invited to fill vacancies on the North Bay-Mattawa Drinking Water Source Protection Committee (SPC), a local multi-stakeholder committee responsible for reducing risks to local municipal drinking water sources in Callander, Mattawa, North Bay, Powassan, and South River.
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