Welcome to NBMCA.ca

North Bay-Mattawa Conservation Authority

NBMCA was founded in 1972 by the Province of Ontario.
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.

Want to honor a Watershed Champion?

Boardwalk of Champions

Our watershed overflows with champions, people whose actions - big and small - have contributed to the health and well-being of our families, our neighbourhoods, our communities, our environment and our watershed.

Permits

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.

Science

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!

Conservation Areas

Looking to hike, bike, or ski?
Paddle a historic canoe route?
Explore our natural heritage?

News

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November 28, 2023

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Water Safety Statement - March 21, 2025

March 20, 2025

A Watershed Conditions Statement – Water Safety has been issued for the North Bay – Mattawa watershed, according to the North Bay-Mattawa Conservation Authority (NBMCA). The previously issued Flood Watch has ended.

Flood Watch and Watershed Conditions Statement - Water Safety

March 18, 2025

A Flood Watch has been issued for the North Bay-Mattawa watershed and Watershed Conditions Statement – Water Safety has been issued for the Lake Nipissing Shoreline in North Bay and Callander and the lower reaches of the Mattawa River in Mattawa.

Flood Outlook Issued for the North Bay – Mattawa Watershed

March 14, 2025

A Flood Outlook has been issued for the North Bay-Mattawa watershed, according to the North Bay-Mattawa Conservation Authority (NBMCA).

Caution on Parks Creek as NBMCA begins Ice Removal on March 17

March 13, 2025

The annual ice removal on Parks Creek near Lakeshore Drive is set to begin Monday, March 17 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 at Lake Nipissing.