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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FLOOD OUTLOOK Issued for the North Bay Mattawa Watershed

July 04, 2025

Flood Outlook Issued for the North Bay – Mattawa Watershed

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

"Water levels and flows in the area have declined following recent rainfall and are now within the typical operating range for this time of year," said NBMCA Duty Officer Githan Kattera.

He added, "A cold front is expected to move into the Northeast region on Sunday, bringing 25 to 35 mm of rain and a high likelihood of significant thunderstorms. These storms may result in locally higher rainfall totals than currently forecasted."

FLOOD WATCH - La Vase River and Mattawa River watershed and its tributaries

June 26, 2025

A FLOOD WATCH remains in effect for the Mattawa River and its tributaries, including the North River, Kaibuskong River, Amable du Fond River, Sharpes Creek, Pautois Creek, and Boom Creek, as well as Chippewa Creek and La Vase River in City of North bay and Watershed Conditions Statement – Water Safety has been issued elsewhere in the North Bay-Mattawa watershed, according to the North Bay-Mattawa Conservation Authority (NBMCA).

FLOOD WATCH – La Vase River and Mattawa River watershed and its tributaries

June 23, 2025

A FLOOD WATCH has been issued the Mattawa River and its tributaries, including North River, Kaibuskong River, Amable du Fond River, Sharpes Creek, Pautois Creek, and Boom Creek, as well as the La Vase River, according to the North Bay-Mattawa Conservation Authority (NBMCA).

2025 MATTAWA RIVER CANOE RACE A SUCCESS!

June 16, 2025

Fifty-four teams from across the province and a few from out of country participated in North Bay-Mattawa Conservation Authority’s Mattawa River Canoe Race presented by Susan Weiskopf, Senior Financial Planner - IG. Paddlers launched from Olmsted Beach, North Bay and made their way through the 64 km trek, five mandatory portages and low water levels to Mattawa Island, competing for the top spot.

Dean Brown from Hamilton and Mark Clout from Port Colborne in the Pro C2 Men’s class took the top spot in a time of 6:42:31.