Reservoir · Texas · United States · USGS NWIS
Choke Canyon Reservoir
20.3% full
Capacity
880.85 hm³
Volume stored
179 hm³
Coordinates
28.484°N, 98.246°W
Last updated
2026-10-01
Current fill
20.3%vs 7 days ago
-0.3%losing
vs 1 year ago
+9.7%year-over-year
7-day trend
→stable
Data source: USGS National Water Information System (NWIS) — 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: 2026-10-01.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 28.484, -98.246 · Open in Google Maps
About Choke Canyon Reservoir
As of October 1, 2026, Choke Canyon Reservoir is filled to 20.3% of its total capacity, holding roughly 179 hm³ of water out of a maximum 881 hm³. At this level the reservoir is low.
Over the most recent week on record the fill level has held broadly steady (-0.3 pts), and it is 9.7 points above its level on the same date a year earlier.
Across the readings we hold for Choke Canyon Reservoir — 1462 data points between October 1, 2022 and October 1, 2026 — the level has ranged from a low of 6.6% (May 18, 2026) to a high of 31.4% (October 1, 2022). On average the reservoir is fullest around October and at its lowest around June.
It is operated by USGS primarily for multiple purposes. It lies within the Texas basin at 28.484°N, 98.246°W.
Key facts
- Current fill level
- 20.3%
- Water stored
- 179 hm³
- Total capacity
- 881 hm³
- 7-day change
- ▼ 0.3 pts
- Year-on-year
- ▲ 9.7 pts
- Primary use
- Multipurpose
- River basin
- Texas
- Operator
- USGS
- Coordinates
- 28.484°N, 98.246°W
- Last updated
- October 1, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 1 Oct 2026 | 20.3% | 179 |
| 30 Sep 2026 | 20.4% | 180 |
| 29 Sep 2026 | 20.4% | 180 |
| 28 Sep 2026 | 20.5% | 180 |
| 27 Sep 2026 | 20.5% | 181 |
| 26 Sep 2026 | 20.6% | 181 |
| 25 Sep 2026 | 20.6% | 181 |
| 24 Sep 2026 | 20.6% | 182 |
| 23 Sep 2026 | 20.7% | 182 |
| 22 Sep 2026 | 20.8% | 183 |
| 21 Sep 2026 | 20.8% | 183 |
| 20 Sep 2026 | 20.8% | 183 |