Geist Reservoir water level
▲ 3.9 points from 99.7% a year ago
Source: waterdata.usgs.gov/monitoring-location/USGS-03351700, accessed October 1, 2026. Updated every 6 hours.
Geist Reservoir is at 103.4% of full pool (784.43 ft) as of September 29, 2026. Geist Reservoir was last full on September 29, 2026 (103.4% of normal storage). Geist Reservoir is near Indianapolis, Indiana.
Geist Reservoir level history
This site counts a reservoir as full on a day its storage is at or above 95% of the dam's normal storage (National Inventory of Dams). Many reservoirs rarely reach 100%, even in wet years, because operators release water for irrigation, power or flood control before they fill, so this site treats 95% as full. Highs and lows are daily readings in the published data, not official records. Source: USGS daily data.
Storage, % of full pool, since 2024
Geist Reservoir is falling: 103.4% full, down 0.2 percentage points since September 27, 2026.
On this same date last year (September 28, 2025), Geist Reservoir was 99.7% full, 3.7 percentage points lower than today's 103.4%.
Weekly averages of the source's daily readings; older years may be monthly or sparser where that is all the source published. Download the charted data (JSON).
Geist Reservoir map
Geist Reservoir is at 39.9054, -85.9821. Open in OpenStreetMap.
The dam
- Recreation
- Water supply
Sources: nid.sec.usace.army.mil, accessed September 29, 2026
On the water
No campgrounds, boat ramps, or swim spots linked to Geist Reservoir yet.
Common questions
- Geist Reservoir is at 103.4% of full pool (784.43 ft) as of September 29, 2026.
- Geist Reservoir was last full on September 29, 2026, when it held 103.4% of its normal storage (elevation 784.43 ft). This site counts a reservoir as full on a day its storage is at or above 95% of the dam's normal storage (National Inventory of Dams). Many reservoirs rarely reach 100%, even in wet years, because operators release water for irrigation, power or flood control before they fill, so this site treats 95% as full. Based on USGS daily data since January 1, 2024.
- In USGS daily data since January 1, 2024, Geist Reservoir's highest elevation was 786.6 ft on August 13, 2026. Its lowest after it first filled (January 1, 2024) was 783.59 ft on September 21, 2024. These are the highest and lowest daily readings in the published data, not official records.
- Geist Reservoir is near Indianapolis, Indiana (39.9054, -85.9821).
- Utility operates the dam at Geist Reservoir.
- Geist Reservoir's dam is used for Recreation, Water supply.