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.
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Conservation Areas
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Paddle a historic canoe route?
Explore our natural heritage?
News
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MoreFLOOD WATCH – La Vase River and Mattawa River watershed and its tributaries
A FLOOD WATCH has been issued the Mattawa River and its tributaries, including North River, Kaibuskong River, Amable du Fond River, Sharpes Creek, Pautois Creek, and Boom Creek, as well as the La Vase River, according to the North Bay-Mattawa Conservation Authority (NBMCA).
More2025 MATTAWA RIVER CANOE RACE A SUCCESS!
Fifty-four teams from across the province and a few from out of country participated in North Bay-Mattawa Conservation Authority’s Mattawa River Canoe Race presented by Susan Weiskopf, Senior Financial Planner - IG. Paddlers launched from Olmsted Beach, North Bay and made their way through the 64 km trek, five mandatory portages and low water levels to Mattawa Island, competing for the top spot.
Dean Brown from Hamilton and Mark Clout from Port Colborne in the Pro C2 Men’s class took the top spot in a time of 6:42:31.
MorePaddlers set to challenge the 64 km Mattawa River Race
Ninety-seven paddlers in 55 canoes, kayaks and stand-up paddleboards will be participating in the 64 km Mattawa River Race from Olmsted Beach, North Bay to the Mattawa Island Conservation area. An additional 15 participants will join the last 13km of the race leaving from Samuel de Champlain Provincial Park. The North Bay-Mattawa Conservation Authority’s Mattawa River Canoe Race is presented by Susan Weiskopf, Senior Financial Planner at IG.
MoreFloodplain Mapping is Now Complete
North Bay-Mattawa Conservation Authority (NBMCA), in collaboration with the Province of Ontario, the City of North Bay, and the Municipality of Callander, has completed a comprehensive update to floodplain mapping for several key watercourses in the region.
The completed mapping includes Chippewa Creek, Parks Creek, and Jessup’s Creek within the City of North Bay, and Lansdowne Creek in the Municipality of Callander.
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