Welcome to NBMCA.ca

1972-2022 - 50 years of conservation!

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?  


Snow Survey Readings for January 16, 2023

January 17, 2023

(North Bay, Ontario, January 17, 2023) Snow is lighter, with denser snow below from previous snow melts and has an average snow depth increase of 19.7 cm since January 3, 2023 reports the North Bay-Mattawa Conservation Authority (NBMCA) who measures snow depth and water content as part of its Flood Forecasting and Warning Program. 


Snow Survey Reading for January 3, 2023

January 04, 2023

(North Bay, Ontario, January 4, 2023) Although we received a substantial amount of snow leading in to the holidays, the warm weather and rain throughout the holidays only shows a snow depth increase of 7.7 cm since December 14, 2022 reports the North Bay-Mattawa Conservation Authority (NBMCA) who measures snow depth and water content as part of its Flood Forecasting and Warning Program. 


Story Hike at Laurentian Escarpment Conservation Area trail fosters outdoor literacy

December 23, 2022

(North Bay, ON.  December 23, 2022)  As part of the North Bay-Mattawa Conservation Authority’s 50th Anniversary, NBMCA is excited to announce the installation of a story hike on Laurentian Escarpment Conservation Area trails in partnership with COOL – Community Oriented Outdoor Literacy (COOL).


Folks who championed Corbeil Conservation Area honoured during NBMCA’s 50th Anniversary

October 14, 2022

(Corbeil, ON.  October 14, 2022)  The North Bay-Mattawa Conservation Authority unveiled a new kiosk sign at Corbeil Conservation Area today, honouring the Corbeil Parents’ Association who championed the formation of the Corbeil Conservation Area more than 40 years ago.



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.



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