Welcome to www.nbmca.ca

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.

Be a Steward!

Prevent Erosion and Runoff!

Planting trees and shrubs along the shoreline or stream bank at your home, farm or cottage is one of the ways you can help protect and preserve water quality. 


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 March 14, 2019

(March 15, 2019) Snow depth remains about twice the long-term average for this time of year and water equivalence is about 60 per cent above the long-term average.  NBMCA measures the snow pack in three subwatersheds as part of our Flood Forecasting Program.


Water Safety Statement Ended

(March 15,  2019) The Water Safety statement issued on March 13, 2019 has ended.


Website live!

(March 11, 2019) NBMCA.ca is now online!   Any comments or questions please contact NBMCA Communications 705 474-5420 or email


Snow Survey Reading - March 1, 2019

(March 1, 2019) Snow depth and water equivalence remain above the long-term average for this time of year and are more than double last year’s measurements.


2018 Year in Review



NBMCA Partners with Nipissing U