Welcome to NBMCA.ca
North Bay-Mattawa Conservation Authority
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.
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.
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Conservation Areas
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Paddle a historic canoe route?
Explore our natural heritage?
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MoreFlood Watch continues in Mattawa
A FLOOD WATCH remains in effect for the Mattawa River, downstream of Hurdman Dam to the Ottawa River.
“Water levels remain elevated in the lower reaches of the Mattawa River due to high flows from upstream tributaries to the Ottawa River. Flooding is expected to persist where it is already occurring ,” said Angela Mills, NBMCA Flood Duty Officer. “Water levels in the remainder of the watershed in local rivers have peaked and are near normal for this time of year.”
MoreFLOOD WATCH – Mattawa River downstream of Hurdman Dam
A FLOOD WATCH remains in effect for the Mattawa River, downstream of Hurdman Dam to the Ottawa River. The Watershed Conditions Statement – Flood Outlook previously issued for the remainder of the North Bay–Mattawa watershed has ended.
MoreFLOOD WATCH and Watershed Conditions Statement – Flood Outlook issued April 29, 2025
A FLOOD WATCH has been issued for the Mattawa River downstream of Hurdman Dam to the Ottawa River. The FLOOD WATCH previously issued for Chippewa Creek has ended and a Watershed Conditions Statement – Flood Outlook remains in effect for the remainder of the North Bay–Mattawa watershed, including Chippewa Creek.
MoreFLOOD WATCH and Watershed Conditions Statement – Flood Outlook - April 25
A FLOOD WATCH has been issued for Chippewa Creek and Watershed Conditions Statement – Flood Outlook remains in effect for the remainder of the North Bay–Mattawa watershed, according to the North Bay-Mattawa Conservation Authority (NBMCA).
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