Reservoir · Iowa · United States · USACE CWMS
Saylorville Lake Reservoir
95.0% full
Capacity
91.28 hm³
Volume stored
87 hm³
Coordinates
41.704°N, 93.689°W
Last updated
2026-05-27
Current fill
95.0%vs 7 days ago
+0.1%gaining
vs 1 year ago
-10.0%year-over-year
7-day trend
→stable
Data source: USACE CWMS — US Army Corps of Engineers — daily reservoir storage volume. Capacity is the design (normal full-pool) capacity from the US National Inventory of Dams (NID); fill % = current volume ÷ design capacity. Last reading: 2026-05-27.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 41.704, -93.689 · Open in Google Maps
About Saylorville Lake Reservoir
As of May 27, 2026, Saylorville Lake Reservoir is filled to 95.0% of its total capacity, holding roughly 87 hm³ of water out of a maximum 91 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (+0.1 pts), and it is 10.0 points below its level on the same date a year earlier.
Across the readings we hold for Saylorville Lake Reservoir — 210 data points between June 13, 2021 and May 27, 2026 — the level has ranged from a low of 86.3% (April 1, 2026) to a high of 105.0% (September 10, 2021). On average the reservoir is fullest around February and at its lowest around April.
It is operated by USACE primarily for multiple purposes. It lies within the Iowa basin at 41.704°N, 93.689°W.
Key facts
- Current fill level
- 95.0%
- Water stored
- 87 hm³
- Total capacity
- 91 hm³
- 7-day change
- ▲ 0.1 pts
- Year-on-year
- ▼ 10.0 pts
- Primary use
- Multipurpose
- River basin
- Iowa
- Operator
- USACE
- Coordinates
- 41.704°N, 93.689°W
- Last updated
- May 27, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 27 May 2026 | 95.0% | 87 |
| 26 May 2026 | 94.9% | 87 |
| 25 May 2026 | 93.9% | 86 |
| 24 May 2026 | 94.6% | 86 |
| 23 May 2026 | 95.6% | 87 |
| 22 May 2026 | 95.4% | 87 |
| 21 May 2026 | 95.0% | 87 |
| 20 May 2026 | 94.9% | 87 |
| 19 May 2026 | 96.3% | 88 |
| 18 May 2026 | 96.2% | 88 |
| 17 May 2026 | 95.3% | 87 |
| 16 May 2026 | 95.5% | 87 |
Frequently asked questions
What is the current water level of Saylorville Lake Reservoir?
As of May 27, 2026, Saylorville Lake Reservoir is at 95.0% of its capacity, holding approximately 87 hm³ of water, according to USACE CWMS (US Army Corps of Engineers) data.
Is Saylorville Lake Reservoir reservoir full?
Saylorville Lake Reservoir is essentially full, sitting at 95.0% of capacity as of May 27, 2026.
Is the water level at Saylorville Lake Reservoir rising or falling?
The level at Saylorville Lake Reservoir has been broadly stable over the latest week on record (+0.1 points).
How much water can Saylorville Lake Reservoir hold?
Saylorville Lake Reservoir has a total capacity of 91 hm³.
Where is Saylorville Lake Reservoir reservoir located?
Saylorville Lake Reservoir is located in Iowa, United States, within the Iowa basin (coordinates 41.704°N, 93.689°W).
What is Saylorville Lake Reservoir used for?
Saylorville Lake Reservoir is used primarily for multiple purposes, and is managed by USACE.