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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?  


Service Disruption - NBMCA Parking Lot

July 12, 2019

(North Bay, ON - July 12, 2019) The parking lot and entrance roadway to NBMCA's office at 15 Janey Ave. North Bay and the Laurentian Escarpment Conservation Area will be under construction while the Near North District School Board undertakes a reconstruction of this area and the adjacent schoolyard to address parking and access to Vincent Massey Public School.


Nipissing First Nation joins NBMCA in shoreline stewardship project

July 12, 2019

(North Bay, ON, July 11, 2019)  Improving the Chippewa Creek shoreline has brought together four high school students from Nipissing First Nation (NFN) and the stewardship team at the North Bay-Mattawa Conservation Authority (NBMCA) to collaborate on a shoreline stewardship project. 


Guide unearths geological history of Eau Claire Gorge during NBMCA hike July 26

July 11, 2019

(North Bay, ON, July 11, 2019)  Explore a natural adventure that began millions of years ago here in our own back yard during the North Bay-Mattawa Conservation Authority’s annual hike at the Eau Claire Gorge Conservation Area Friday, July 26.


Flood Watch Downgraded to Water Safety Statement

June 26, 2019

(North Bay June 26, 2019 – 5 pm)   Today the North Bay-Mattawa Conservation Authority (NBMCA) downgraded the Flood Watch for the North Bay and Callander shorelines of Lake Nipissing to a Water Safety Statement and renewed the Water Safety Statement for the Mattawa River below the Hurdman Dam. 


Flood Warning Downgraded to Flood Watch for Lake Nipissing

June 19, 2019

(North Bay June 19, 2019 – 3 pm)   Water levels on Lake Nipissing have lowered enough for the Flood Warning to be downgraded to a Flood Watch and the Parks Creek Backflood Control Structure to be shut down today by the North Bay-Mattawa Conservation Authority. The Flood Warning for Lake Nipissing had been in place since April 25, 2019.


2018 Year in Review



Register today for the 43rd Annual Mattawa River Canoe Race - July 27, 2019



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