Current Watershed Conditions


South Nation Conservation works with its partner municipalities along the South Nation, St. Lawrence and Ottawa Rivers to provide advanced notice of flooding and low water conditions through the provincial Flood Forecasting and Warning and Low Water Response programs.





Current Watershed Conditions and Flood Messages:


The South Nation Conservation (SNC) Water Response Team has upgraded the Level I (minor) low water conditions issued on June 29th to Level II (moderate) low water conditions for the Upper South Nation Subwatershed.

The Upper South Nation Subwatershed includes portions of Augusta, Edwardsburgh/Cardinal, Elizabethtown-Kitley, South Dundas, South Stormont, North Grenville, North Dundas, North Stormont, Russell, Casselman, and Nation. The remainder of the South Nation Watershed will remain in Level I (minor) low water conditions.

Low water conditions are determined based on data collected from precipitation and stream gauges across the watershed. In the past two weeks, conditions within the Upper South Nation Subwatershed have worsened due to persistent hot and dry weather, causing flows in rivers and streams to continue declining. Evaporation could become a significant concern if current conditions persist.

SNC's Water Response Team, consisting of local representatives from provincial and municipal governments, agriculture, and other special interest groups, met on July 9th to discuss current conditions and next steps. Members reported observations of dried-up streams, reduced crop yields, and increased demand on municipal well water.

Residents, businesses, and other industries throughout the Upper South Nation Subwatershed can help mitigate the impacts of Level II low water conditions by reducing their water consumption by 20% and limit non-essential uses. Residents should also be aware of their municipality's water conservation and fire by-laws. 

The remainder of the Watershed under Level I low water conditions should continue to voluntarily reduce their water consumption by 10%.

Property owners are encouraged to contact SNC if they are experiencing issues with their well. Should low water conditions worsen, shallow wells may go dry.

SNC will continue to monitor watershed conditions and will provide updates as required.

FOR MORE INFORMATION: Omar Kana’n, Water Resources Specialist – Engineering, 613-984-2948, .

MEDIA CONTACT: Taylor Campbell, Communications Specialist, 613-551-7158,



June 12, 2020 - Shoreline Conditions Statement – Water Safety: St. Lawrence River Static Water Level

South Nation Conservation (SNC) has downgraded the Flood Watch for the St. Lawrence River issued on April 12, 2020, to a Water Safety.

Weather Forecast:
No significant rainfall is currently in the weather forecast.

Environmental Conditions:
According to the International Lake Ontario – St. Lawrence River Board, Lake Ontario’s water levels remain above average for this time of year but have peaked and are declining. Levels are expected to continue declining in the coming weeks depending on weather conditions.

High inflows from Lake Erie continue into Lake Ontario, which will prevent any rapid lowering of Lake Ontario’s levels.

Lake Ontario’s water levels dropped to 75.31 m this week; 24 cm above average; and 60 cm below those observed at this time in 2019.

Levels in Lake Ontario influence levels in the upper St. Lawrence River, particularly from Kingston to Iroquois, including Maitland, Johnstown and Cardinal.

As Lake Ontario levels remain above 75.30 m, there is increased potential for shoreline flooding, flooding in low-lying areas, basement and septic system inundation, and wave-driven erosion.

Residents are advised that strong winds may cause large waves, further aggravating water levels which may affect structures close to shore.

Residents are advised to exercise caution when near watercourses as flows may rapidly increase and cause slippery or unstable banks. Parents are encouraged to explain these dangers to their children.

Residents in flood prone or low-lying areas, historically susceptible to flooding, should take the necessary precautions to protect their property:

  • Ensuring sump pump is clear, in good working condition and has a backwater valve on it.
  • Portable backup generator and pump.
  • Ensuring downspouts are clear and the outlet is at least 3 m from
    the dwelling.
  • Removing or securing items that might float away as flows increase.
  • Removing valuable items from basements or lower floors that could be subject to flooding.
  • Keep emergency phone numbers handy.
  • Familiarize yourself with your municipality’s emergency preparedness plan.

This statement is in effect until Friday, July 10, 2020.

SNC monitors the water levels and weather forecasts as part of the Flood Forecasting and Warning Program. Updates are provided as conditions change.

The International Lake Ontario – St. Lawrence River Board continues to monitor conditions on an ongoing basis. Information on hydrologic conditions, water levels and outflows, including graphics and photos, are available on the Board’s website at

Please visit for more information. To provide feedback with respect to changes in water related conditions please email, posted on our Facebook (/SouthNationConservation) or Twitter (@SouthNationCA).

FOR MORE INFORMATION: Geoff Owens, SNC Regulations Officer,

Taylor Campbell, SNC Communications Specialist,

Forwarded to: 
All Flood Forecasting and Warning Directory






South Nation Watershed St. Lawrence River Ottawa River

January 9, 2020: Water Safety Statement

January 14, 2020: Water Safety Statement Update

January 22, 2020: Water Safety Statement Update 2

January 28, 2020: Water Safety Statement Update 3

March 9, 2020: Flood Outlook Statement

March 17, 2020: Flood Outlook Statement Update

March 27: Water Safety Statement

June 29, 2020: Level I Low Water Condition

July 9, 2020: Level II Low Water Conditon (Upper South Nation)

March 13, 2020: Flood Outlook Statement

March 20, 2020: Flood Outlook Statement Update

March 27, 2020: Flood Outlook Statement Update 2

April 3, 2020: Flood Outlook Statement Update 3

April 9, 2020: Flood Outlook Statement Update 4

April 12, 2020: Flood Watch

April 17, 2020: Flood Watch (Update)

April 24, 2020: Flood Watch (Update 2)

May 1, 2020: Flood Watch (Update 3)

May 15, 2020: Flood Watch (Update 4)

May 29, 2020: Flood Watch (Update 5)

June 12, 2020: Shoreline Conditions: Water Safety

March 30, 2020: Water Safety Statement 

April 9, 2020: Flood Watch

April 20, 2020: Flood Watch Termination                                 


Past Statements: