Lac Champlain
Unusually lowWater level is well below normal for mid-September and falling.
Current Weather
Sep 20A few showers
Environment Canada — Eastern Townships
vs. Last Year
No data available
7-Day Trend
Down 11.0 cm over the past week
-11.0 cm over 7 days
Seasonal Position
8th percentile
Based on 59 years of records
Seasonal Outlook
This lake usually holds steady over the next week.
Over two weeks, levels typically drops slightly.
This year is moving slower than usual.
Based on 59 years of seasonal patterns. This is a historical seasonal pattern, not a forecast.
Fish Consumption Advisories (6 species)
The following consumption advisories are in effect for fish caught in Lac Champlain.
| Contaminant | Size | General pop. | Sensitive pop. |
|---|---|---|---|
| Mercure | 25–30 cm | 8/month | — |
| Mercure | 30–35 cm | 8/month | — |
| Mercure | 35+ cm | 8/month | — |
| Contaminant | Size | General pop. | Sensitive pop. |
|---|---|---|---|
| Mercure | 15–20 cm | 8/month | — |
| Mercure | 20–25 cm | 8/month | — |
| Mercure | 25+ cm | 8/month | — |
| Contaminant | Size | General pop. | Sensitive pop. |
|---|---|---|---|
| Mercure | 30–40 cm | 8/month | — |
| Mercure | 40–50 cm | 8/month | — |
| Mercure | 50+ cm | 4/month | — |
| Contaminant | Size | General pop. | Sensitive pop. |
|---|---|---|---|
| Mercure | 40–55 cm | 8/month | — |
| Mercure | 55–70 cm | 8/month | — |
| Mercure | 70+ cm | 8/month | — |
| Contaminant | Size | General pop. | Sensitive pop. |
|---|---|---|---|
| Mercure | 15–20 cm | 8/month | — |
| Mercure | 20–25 cm | 8/month | — |
| Mercure | 25+ cm | 8/month | — |
| Contaminant | Size | General pop. | Sensitive pop. |
|---|---|---|---|
| Mercure | 15–20 cm | 8/month | — |
| Mercure | 20–25 cm | 8/month | — |
| Mercure | 25+ cm | 8/month | — |
Lake Profile
Estimated from HydroLAKES v1.0 (Messager et al., 2016). Modeled geo-statistical estimate, not a direct survey measurement.
Water Level — Last 30 Days
Technical details
- Current level
- 4.22 m
- Reference value
- 4.24 m (rolling_6h_mean)
- Percentile for date
- 8th percentile
- Years of record
- 59
- Source station
- CHAMPLAIN (LAC) A PHILIPSBURG (02OH001)
- Est. average depth
- 22.6 m
- Relationship type
- direct_lake
- Mapping confidence
- medium
- Today's normal range
- 4.36–4.68 m
- Same-date historical range
- 4.09–5.49 m
- 30-day change
- -21.7 cm
- Data confidence
- medium
- Observed at
- Sep 20, 2026
- Last snapshot
- Sep 20, 2026
Data source: ECCC Water Office — Station 02OH001. Water level readings are provisional and subject to revision. This is not a navigation or flood-warning service.