Duffins Creek at Ajax
Water level and flow at gauge 02HC049, Ontario. The flow is normal for October (76% of the median). In the last 24 hours it has been steady.
Latest reading Oct 25, 9 AM local standard time (about an hour ago) · data checked · we check every 30 minutes
Compared with a normal October
Normal for October (middle half of 37 years of monthly averages): 1.25 m³/s44.1 cfs – 2.22 m³/s78.4 cfs, median 1.64 m³/s57.9 cfs. Right now it is at 76% of the median.
January 11, 2020 · approved records 1990–2025 (HYDAT). Right now the flow is 1% of that record.
2% higher than on October 25, 2025 (1.22 m³/s43.1 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 36 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. High 17. UV index 4 or moderate.
Partly cloudy. Low 9.
Cloudy. 30 percent chance of showers in the morning and early in the afternoon. Wind becoming northwest 20 km/h in the morning. High 15. UV index 3 or moderate.
Cloudy. Low minus 2.
Forecast for Pickering (5 km away) from Environment and Climate Change Canada, issued . Full official forecast ↗ · we check for new forecasts every 2 hours.
Nearby gauges
| Lynde CreekWhitby · 8 km | 8.07 m26.46 ft | Normal |
| Lynde CreekTributary Near Kinsale · 11 km | 3.76 m12.35 ft | Normal |
| West Duffins CreekAbove Green River · 12 km | 2.18 m7.16 ft | Below normal |
| Highland CreekWest Hill · 13 km | 5.97 m19.58 ft | Very low |
| Rouge RiverMarkham · 14 km | 3.30 m10.83 ft | Below normal |
| Little Rouge CreekLocust Hill · 14 km | 10.21 m33.50 ft | Normal |
About this gauge
Station: 02HC049 · Duffins Creek at Ajax
Location: 43.8489, -79.0561 · 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 Duffins Creek at Ajax today?
The latest reading (Oct 25, 9 AM, local standard time) is 0.76 m (2.50 ft) with a flow of 1.25 m³/s (44.1 cfs).
Is the Duffins Creek at Ajax high right now?
The flow is normal for October (76% of the median).
Is the Duffins Creek rising or falling?
In the last 24 hours it has been steady.
What is the highest flow ever recorded on the Duffins Creek at Ajax?
104 m³/s (3,673 cfs) on January 11, 2020, the highest instantaneous flow in the approved records of the Water Survey of Canada (1990–2025). Events after 2025 are not yet in the approved archive.
How does the Duffins Creek at Ajax compare with a year ago?
The flow is 2% higher than on October 25, 2025 (1.22 m³/s (43.1 cfs), approved daily mean (HYDAT)).
Where does this data come from?
Gauge 02HC049 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.