Lake Hopatcong Water Level History
Thirty-day lake-level chart, recent highs and lows, net change and daily summaries from the matched USGS station.
Lake Hopatcong water-level chart
Source: U.S. Geological Survey monitoring station ↗. Recent measurements may be provisional.
What has Lake Hopatcong been doing?
Across the available 30-day series, Lake Hopatcong is falling overall. The measured range runs from 9.02 ft to 9.28 ft, with a net change of -0.17 ft.
Lake levels can respond to rainfall, watershed inflow, dam and hydropower operations, seasonal target elevations, evaporation and downstream release requirements. This page reports what the matched sensor measured; it does not infer why an operator changed a reservoir.
Recent daily levels
| Date | Low | Average | High |
|---|---|---|---|
| Oct 7 | 9.04 ft | 9.06 ft | 9.07 ft |
| Oct 6 | 9.06 ft | 9.08 ft | 9.11 ft |
| Oct 5 | 9.07 ft | 9.09 ft | 9.13 ft |
| Oct 4 | 9.09 ft | 9.11 ft | 9.12 ft |
| Oct 3 | 9.10 ft | 9.12 ft | 9.15 ft |
| Oct 2 | 9.11 ft | 9.12 ft | 9.15 ft |
| Oct 1 | 9.12 ft | 9.13 ft | 9.14 ft |
| Sep 30 | 9.13 ft | 9.14 ft | 9.15 ft |
| Sep 29 | 9.13 ft | 9.14 ft | 9.15 ft |
| Sep 28 | 9.11 ft | 9.14 ft | 9.16 ft |
| Sep 27 | 9.06 ft | 9.11 ft | 9.15 ft |
| Sep 26 | 9.02 ft | 9.06 ft | 9.11 ft |
| Sep 25 | 9.03 ft | 9.07 ft | 9.09 ft |
| Sep 24 | 9.05 ft | 9.08 ft | 9.11 ft |
| Sep 23 | 9.08 ft | 9.11 ft | 9.14 ft |
| Sep 22 | 9.11 ft | 9.13 ft | 9.15 ft |
| Sep 21 | 9.12 ft | 9.14 ft | 9.16 ft |
| Sep 20 | 9.11 ft | 9.13 ft | 9.15 ft |
| Sep 19 | 9.11 ft | 9.13 ft | 9.16 ft |
| Sep 18 | 9.14 ft | 9.16 ft | 9.18 ft |
| Sep 17 | 9.15 ft | 9.17 ft | 9.18 ft |
| Sep 16 | 9.17 ft | 9.18 ft | 9.20 ft |
| Sep 15 | 9.19 ft | 9.21 ft | 9.23 ft |
| Sep 14 | 9.22 ft | 9.25 ft | 9.28 ft |
| Sep 13 | 9.09 ft | 9.20 ft | 9.27 ft |
| Sep 12 | 9.09 ft | 9.11 ft | 9.13 ft |
| Sep 11 | 9.12 ft | 9.14 ft | 9.16 ft |
| Sep 10 | 9.12 ft | 9.15 ft | 9.16 ft |
| Sep 9 | 9.13 ft | 9.16 ft | 9.18 ft |
| Sep 8 | 9.17 ft | 9.18 ft | 9.20 ft |
Lake Hopatcong level-history FAQ
How has Lake Hopatcong water level changed over the last 30 days?
Across the available 30-day sensor series, the net change is -0.17 ft and the overall direction is falling.
What was the highest Lake Hopatcong level in the last 30 days?
The highest reading in the available 30-day series is 9.28 ft.
What was the lowest Lake Hopatcong level in the last 30 days?
The lowest reading in the available 30-day series is 9.02 ft.
Are historical USGS lake readings final?
Not always. Recent readings may be marked provisional and can be revised by the source agency after quality review.