Provincially Significant Wetlands

Provincially Significant Wetlands (PSWs) are those areas identified by the province as being the most valuable. They are determined by a science-based ranking system known as the Ontario Wetland Evaluation System (OWES). This Ministry of Natural Resources (MNR) framework provides a standardized method of assessing wetland functions and societal values, which enables the province to rank wetlands relative to one another. This information is provided to planning authorities to support the land use planning process.

The Provincially Significant Wetlands found in Renfrew County are represented by yellow markers on the Renfrew County Natural Areas Map.

Visit the MNR Resource on Provincially Significant Wetlands

Madawaska River Watershed Wetlands

Balmer Lake

A Non-Provincially significant wetland, composed of two wetland types (53% swamp and 47% marsh)

Conroy Marsh

A Provincially significant wetland complex, made up of nine individual wetlands, composed of three wetland types (28.5% fen, 43.5% swamp, and 28% marsh)

Constant Lake

A Non-Provincially significant wetland, composed of three wetland types (7% bog, 34% swamp and 59% marsh)

Constant Lake at Balaclava

A Non-Provincially significant wetland, composed of three wetland types (7% bog, 34% swamp and 59% marsh)

Donnelly's Bay

A Provincially significant wetland, composed of three wetland types (17% bog, 37% swamp and 46% marsh)

Ferguson Lake

A Provincially significant wetland, composed of three wetland types (15% bog, 70% swamp and 15% marsh)

Grassy Bay

A Provincially significant wetland, composed of three wetland types (8% bog, 23% swamp and 69% marsh)

Perrault Lake

A Non-Provincially significant wetland complex, made up of two individual wetlands, composed of three wetland types (32% bog, 59% swamp and 9% marsh)

Shamrock Wetland

A Non-Provincially significant wetland complex, made up of four individual wetlands, composed of three wetland types (20% bog, 64% swamp and 16% marsh)

Streich Lake

A Provincially significant wetland, composed of two wetland types (65% swamp and 35% marsh)

White Lake Fen

A Provincially significant wetland, composed of four wetland types (34% bog, 13% fen, 10% swamp and 43% marsh)

White Lake- Lowney Lake Wetland Complex

A Provincially significant wetland.

Madawaska Watershed Wetland Maps

Bonnechere River Watershed Wetlands

Cochrane Creek

A Non-Provincially significant wetland, composed of three wetland types (14% bog, 80.5% swamp and 5.5% marsh)

Horton Lake/Deli's Lake

A Provincially significant wetland, composed of two wetland types (58% swamp and 42% marsh)

Killaloe Swamp

A Provincially significant wetland.

Reid Lake/Miller Lake

A Provincially significant wetland, composed of two wetland types (44% swamp and 56% marsh)

Samally Lake

A Provincially significant wetland, composed of two wetland types (59% swamp and 41% marsh)

Sherwood Marsh

A Provincially significant wetland.

Silver Creeek Wetland

A Provincially significant wetland, composed of three wetland types (46% bog, 52% swamp and 2% marsh)

Wilber Lake

A Provincially significant wetland, composed of three wetland types (2% bog, 32% swamp and 66% marsh)

Bonnechere Watershed Wetland Maps

Snake River Watershed Wetlands

Lake Dore

A Provincially significant wetland, composed of two wetland types (62% swamp and 38% marsh)

Mink Creek

A Non-Provincially Significant wetland, composed of two wetland types (88% swamp and 12% marsh)

Snake River Marsh

A Provincially significant wetland, composed of two wetland types (84% swamp and 16% marsh)

Snake Watershed Wetland Maps

Muskrat River Watershed Wetlands

Cobden Marsh

A Provincially significant wetland, composed of two wetland types (39% swamp and 61% marsh)

Green Lake

A Non-Provincially significant wetland, composed of three wetland types (35% bog, 48% swamp and 16% marsh)

Mud Lake/Mud Creek

A Provincially significant wetland, composed of two wetland types (80% swamp and 20% marsh)

Muskrat Lake Complex #1, 2 and 3

A Provincially significant wetland.

Muskrat River Watershed Wetland Maps

Ottawa River Watershed Catchment Wetlands

Bellow's Bay

A Provincially significant wetland, composed of two wetland types (55% swamp and 45% marsh)

Bonnechere Rivermouth

A Provincially significant wetland, composed of two wetland types (26% swamp and 74% marsh)

Black Bay Wetland

A Provincially significant wetland, composed of two wetland types (94% swamp and 6% marsh)

Grants Creek Marsh

A Provincially significant wetland complex, made up of three individual wetlands, composed of three wetland types (24% fen, 23% swamp and 54% marsh)

Hazley Bay/Lisk Bay

A Provincially significant wetland complex, made up of 14 individual wetlands, composed of two wetland types (26% swamp and 74% marsh)

Little Lakes

A Non-Provincially significant wetland, composed of three wetland types (4% bog, 66% swamp and 30% marsh)

Nopoming

A Provincially significant wetland, composed of three wetland types (50% fen, 25% swamp and 25% marsh)

Westmeath Bog

A Provincially significant wetland, composed of three wetland types (23% swamp, 5% marsh and 72% bog)

Ottawa River Catchment Wetland Maps

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White Lake Fen - Only a small portion extends into Renfrew County. These significant wetlands contain cedar

swamp as well as the best example of a fen in the Ottawa Valley. Fens are characterized by a high water

table with slow internal drainage by seepage down to low gradients. The surface waters may be acidic or

alkaline and are not as low in nutrients as bogs and as a result are more productive. Sedges dominate with a

few shrubs and trees.

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