1124.01 ft NAVD88
level Reading is typical for mid-August.
Reading comes straight from U.S. Army Corps of Engineers Access to Water data (USACE series Prompton.Elev.Inst.15Minutes.0.Rev-DCP) and updates live when you load this page.
Prompton Lake through the year
The band is the lake's own normal: where the level has run on each calendar day, 2011–2026. The summer drawdown — and how this year sits in it — shows up without reading a single number.
This year vs the years that matter
This year's trace against last year and the driest and wettest years on record — the drought-context question every lake regular asks.
- 2026 (this year)
- 2025 (last year)
- 2018 (wettest on record)
- 2015 (driest on record)
Full pool, datum, and the gauge
"Full pool" here means the conservation pool — the level the lake is designed to hold for water supply and recreation, not the flood-control space above it. The full explainer covers flood pool and dead pool too.
| Full pool | not published by the operator |
|---|---|
| Gauge | USACE series Prompton.Elev.Inst.15Minutes.0.Rev-DCP · U.S. Army Corps of Engineers Access to Water data |
| Datum | NAVD88 |
| Last verified | August 20, 2026 |
LakeDates reports lake level, not ramp status. Whether a given ramp or marina is usable at this level varies ramp by ramp — call the marina before you tow.
Quick answers
How full is Prompton Lake right now?
Prompton Lake is at 1124.01 ft (NAVD88) as of August 20, 2026 — Reading is typical for mid-August.
Is Prompton Lake full?
USACE Philadelphia District doesn't publish a conservation-pool figure for Prompton Lake, so this page shows the reading against the lake's own seasonal history instead.
What is full pool for Prompton Lake?
USACE Philadelphia District doesn't publish a single conservation-pool elevation for Prompton Lake. The seasonal chart shows the range the lake actually runs instead.