Speed and Eramosa River flows

Learn how to read these charts on our River and stream flows page.
Many timeseries can be downloaded from our Data Downloads page.

Critical flows

**Critical flows table:** This chart will help you understand the significance of various flows levels. The chart shows the name of the gauge, the affected communities and various flow levels along with the significance of that flow level. Flows are measured in cubic metres per second, i.e. the amount of water flowing past a spot in one second.
Gauge (Community)	Flow (m³/s)	Significance
Armstrong Mills	0.6	Normal summer low flow
Edinburgh Rd. (Guelph)	1.7	Normal summer low flow
	50	Black Bridge Rd. flooded
	255	Channel capacity
Road 32 (Guelph/Eramosa)	2	Normal summer low flow
Beaverdale Rd. (Cambridge)	3.5	Normal summer low flow
	50	Mill Run Trail closed under 401
	50	Riverside Park flooded
Eramosa River at Watson Rd (Puslinch)	0.9	Normal summer low flow

Location of flow gauges on the Speed and Eramosa rivers

Provisional Data

Caution: Users of the GRCA's real-time data are cautioned to consider the provisional nature of the information before using it for decisions that concern personal or public safety or the conduct of business.

The Grand River Conservation Authority assumes no responsibility for the correctness of the information contained in this website nor liability to any user of such information, regardless of the purpose.

Warning! River levels and flows can change rapidly.

Grand River Conservation Authority
400 Clyde Road, PO Box 729
Cambridge, ON
N1R 5W6
Phone: 519-621-2761
Toll Free: 1-866-900-4722
grca@grandriver.ca