Pefferlaw Brook at Udora
Water level and flow at gauge 02EC018, Ontario. The flow is below normal for October (78% of the median). In the last 24 hours it has been steady.
Latest reading Oct 25, 8 AM local standard time (2 hours ago) · data checked · we check every 30 minutes
Compared with a normal October
Normal for October (middle half of 39 years of monthly averages): 1.80 m³/s63.7 cfs – 2.55 m³/s90.2 cfs, median 2.20 m³/s77.7 cfs. Right now it is at 78% of the median.
March 13, 1990 · approved records 1987–2025 (HYDAT). Right now the flow is 2% of that record.
7% higher than on October 25, 2025 (1.60 m³/s56.5 cfs)
approved daily mean (HYDAT)
Last 30 days
Hourly readings · shaded: normal range for this month
This year compared with past years
Daily flow
Normal range: monthly averages of 38 years (lighter band: 10th–90th percentile). Past years: approved daily means from HYDAT, the Water Survey of Canada archive (the latest year published is 2025). 2026: daily means of the provisional real-time readings collected by Canada River Levels since October 22, 2026.
Weather near this gauge
Sunny. Fog patches dissipating this morning. Wind becoming south 20 km/h late this morning. High 17. UV index 4 or moderate.
Partly cloudy. 30 percent chance of showers overnight. Low 8.
Cloudy. 30 percent chance of showers in the morning. Wind becoming northwest 20 km/h in the morning. High 14. UV index 3 or moderate.
Cloudy. Low minus 2.
Forecast for Port Perry (27 km away) from Environment and Climate Change Canada, issued . Full official forecast ↗ · we check for new forecasts every 2 hours.
Nearby gauges
| Black RiverBaldwin · 12 km | 8.40 m27.57 ft | Normal |
| Uxbridge BrookUxbridge · 16 km | 2.78 m9.13 ft | Below normal |
| Beaver RiverBeaverton · 17 km | 7.84 m25.73 ft | Normal |
| Lake ScugogScugog Island Marina · 28 km | 9.01 m29.55 ft | No normal yet |
| Mariposa BrookLittle Britain · 28 km | 2.28 m7.47 ft | Normal |
| Holland River East BranchHolland Landing · 30 km | 7.48 m24.53 ft | Below normal |
About this gauge
Station: 02EC018 · Pefferlaw Brook Near Udora
Location: 44.2675, -79.1946 · Ontario
Water levels are measured from a local reference point at each gauge, not from sea level, so they cannot be compared between gauges.
Official sources
For flood warnings, advisories and approved data, always use these official services:
Questions
What is the water level of the Pefferlaw Brook at Udora today?
The latest reading (Oct 25, 8 AM, local standard time) is 1.12 m (3.68 ft) with a flow of 1.72 m³/s (60.7 cfs).
Is the Pefferlaw Brook at Udora high right now?
The flow is below normal for October (78% of the median).
Is the Pefferlaw Brook rising or falling?
In the last 24 hours it has been steady.
What is the highest flow ever recorded on the Pefferlaw Brook at Udora?
104 m³/s (3,673 cfs) on March 13, 1990, the highest instantaneous flow in the approved records of the Water Survey of Canada (1987–2025). Events after 2025 are not yet in the approved archive.
How does the Pefferlaw Brook at Udora compare with a year ago?
The flow is 7% higher than on October 25, 2025 (1.60 m³/s (56.5 cfs), approved daily mean (HYDAT)).
Where does this data come from?
Gauge 02EC018 of the Water Survey of Canada (Environment and Climate Change Canada). Real-time data are provisional and may be revised. We check for new readings every 30 minutes. Canada River Levels is not an official source.