Welcome to NBMCA.ca

Leaders in Watershed Management!

North Bay-Mattawa Conservation Authority

NBMCA was founded in 1972 by the Province of Ontario and its 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.
NBMCA acknowledges that we are in Robinson-Huron Treaty territory, the Traditional Territory and Treaty Lands
of the Nbisiing Anishinaabeg, as well as the unceded and ancestral Traditional Territory
of the Algonquin People and the Metis Nation.

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?  


Development Around Wetlands and Watercourses Focus of NBMCA Conferences

March 28, 2023

The North Bay-Mattawa Conservation Authority (NBMCA) is hosting two half-day conferences this week, one for municipal staff and another for construction contractors, focusing on best management practices and permit applications for works around wetlands, watercourses, and steep slopes.


Snow Survey Readings for March 23, 2023

March 24, 2023

(North Bay, Ontario, March 24, 2023) Snow depth is normal for this time of year, but much higher than this time last year (27.7 cm in 2022) according to the North Bay-Mattawa Conservation Authority which measures the snowpack as part of its flood forecasting program.


Region Scores Well with 2023 Watershed Report Card

March 22, 2023

(March 22, 2023 – North Bay)   A Watershed Report Card for the region’s subwatersheds, released today by the North Bay-Mattawa Conservation Authority, tells us that the overall watershed health is good, with room for improvement in a few subwatersheds. 


Snow Survey for March 15, 2023

March 16, 2023

(North Bay, Ontario, March 16, 2023) The average snow depth increased by 4.2 cm and the average water equivalence increased by 20.0 mm since March 2, 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. 


Caution on Parks Creek as Ice Removal begins March 20

March 16, 2023

(North Bay, March 16, 2023)   The annual ice removal on Parks Creek near Lakeshore Drive is set to begin Monday, March 20 and the North Bay-Mattawa Conservation Authority is urging the public and snowmobilers to stay off the creek and away from the mouth of the creek on Lake Nipissing.


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