North Bay-Mattawa Conservation Authority

NBMCA was founded in 1972 by the Province of Ontario and the NBMCA’s 10 member municipalities.
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.

Celebrating 50 years!

Boardwalk of Champions

Join in the celebration
and help us recognize
our unsung
watershed heroes!


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.


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!

Trails & Events

Looking to hike, bike, or ski?
Paddle a historic canoe route?
Explore our natural heritage?
Take part in an environmental festival or special event?  


Powassan Honours NBMCA's 50th Anniversary

August 26, 2022

The past, present and future of watershed management met Thursday when the Municipality of Powassan, youth from their summer program and the North Bay-Mattawa Conservation Authority (NBMCA) came together to plant a sugar maple tree at Powassan’s firehall in honour of NBMCA’s 50th anniversary.



Watershed Wonders Photo Contest & Workshop!

August 02, 2022

A picture, as they say, is worth 1,000 words and now’s your chance to capture and share the beauty of the region’s watersheds by entering the North Bay-Mattawa Conservation Authority’s Watershed Wonders 50th Anniversary Photography Contest.



All Paddlers Cross the Finish Line at Mattawa River Canoe Race

July 23, 2022

After a two-year hiatus due to COVID, 42 teams from across the country participated in North Bay-Mattawa Conservation Authority’s 45th Mattawa River Canoe Race with the 1st place finishers completing the 64km race in just over six hours.


Experience “Forest Bathing” at Eau Claire Gorge Conservation Area Hike July 22

July 15, 2022

(North Bay, ON, July 15, 2022)  Join guest guide Laura Kielpinski of the Canadian Ecology Centre for a “Forest Bathing” hike during the North Bay-Mattawa Conservation Authority’s annual Eau Claire Gorge Conservation Area hike Friday, July 22.


Wildlife Preservation Canada Bumble Bee Survey!

June 15, 2022

(North Bay, Ontario, June 15, 2022) It was good news for a number of bee species in Laurier Woods Conservation Area when Wildlife Preservation Canada’s (WPC) bee research team’s turned up a number of species on the decline during their recent spring survey to locate rare and declining bumble bees throughout Ontario.


The 2022 Mattawa River Canoe Race is back July 23, 2022! Check out the website for details.
Mattawa River Canoe Race

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