August 15, 2019

Minor Low Water Conditions in Rideau Valley Watershed

For more information, contact:

  • Brian Stratton
  • RVCA Manager Engineering Services
  • 613-692-3571 or 1-800-267-3504 ext. 1141
  • 613-799-9423 (cell)

August 15, 2019 — As the warm, dry weather continues, conditions in the Rideau Valley Watershed now meet the threshold for Minor Low Water status under the Ontario Low Water Response Program. Watershed residents and businesses are encouraged to conserve water during dry conditions.

After a cool and wet spring with very significant flooding in some areas, July and August have been mostly warm and dry across the Rideau Valley watershed, with some localized rainfall in early August. The average 90-day rainfall measured at climate stations in and around the watershed is just shy of 80 per cent of normal for this time of year, which is a key indicator for Minor Low Water status. In the past 30 days, average rainfall has been about 40 per cent of normal. Looking ahead, the seven-day weather forecasts suggests we’ll continue to experience above average temperatures and minimal precipitation, and conditions are expected to decline.

For the most part, water levels in lakes and rivers are close to normal for this time of year. However, we expect water levels will start to decline more noticeably in the near future. Outflows from the Rideau Canal’s reservoir lakes have recently been increased to compensate for the water level declines in river reaches downstream, including the Tay River and Big Rideau Lake. However, there is still sufficient water for Parks Canada to state that draft and navigation are normal throughout the Rideau Canal system inside the Rideau Valley watershed.

Conservation Authority staff continue to monitor conditions and communicate with water managers throughout the watershed. Updates to this message will be issued as conditions warrant.

More resources:

 Ministry of Environment and Climate Change:

Ontario’s Low Water Response program:

RVCA website:

Hourly and daily streamflows and water levels:

Contact Us

Rideau Valley Conservation Authority
3889 Rideau Valley Drive
Manotick, Ontario K4M 1A5

613-692-3571, 1-800-267-3504



Regular Hours: Monday to Friday, 8:30 a.m. to 4:30 p.m.

Member of: conservation ontario