Reservoir · Iowa · United States · USACE CWMS
Saylorville Lake Reservoir
93.8% full
Capacity
91.28 hm³
Volume stored
86 hm³
Coordinates
41.704°N, 93.689°W
Last updated
2026-07-30
Current fill
93.8%vs 7 days ago
-0.1%losing
vs 1 year ago
+5.2%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: 2026-07-30.
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 July 30, 2026, Saylorville Lake Reservoir is filled to 93.8% of its total capacity, holding roughly 86 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 5.2 points above its level on the same date a year earlier.
Across the readings we hold for Saylorville Lake Reservoir — 197 data points between July 31, 2021 and July 30, 2026 — the level has ranged from a low of 86.8% (June 9, 2026) to a high of 105.0% (September 10, 2021). On average the reservoir is fullest around November 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
- 93.8%
- Water stored
- 86 hm³
- Total capacity
- 91 hm³
- 7-day change
- ▼ 0.1 pts
- Year-on-year
- ▲ 5.2 pts
- Primary use
- Multipurpose
- River basin
- Iowa
- Operator
- USACE
- Coordinates
- 41.704°N, 93.689°W
- Last updated
- July 30, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 30 Jul 2026 | 93.8% | 86 |
| 29 Jul 2026 | 93.9% | 86 |
| 28 Jul 2026 | 94.1% | 86 |
| 27 Jul 2026 | 93.9% | 86 |
| 26 Jul 2026 | 93.8% | 86 |
| 25 Jul 2026 | 93.6% | 85 |
| 24 Jul 2026 | 93.0% | 85 |
| 23 Jul 2026 | 92.9% | 85 |
| 22 Jul 2026 | 93.8% | 86 |
| 21 Jul 2026 | 97.1% | 89 |
| 20 Jul 2026 | 94.4% | 86 |
| 19 Jul 2026 | 94.6% | 86 |
Frequently asked questions
What is the current water level of Saylorville Lake Reservoir?
As of July 30, 2026, Saylorville Lake Reservoir is at 93.8% of its capacity, holding approximately 86 hm³ of water, according to USACE CWMS (US Army Corps of Engineers) data.
Is Saylorville Lake Reservoir reservoir full?
No. As of July 30, 2026, Saylorville Lake Reservoir is high at 93.8% of its capacity, so it is not full.
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.