Reservoir · Texas · United States · BOR RISE
Choke Canyon Reservoir
Choke Canyon Reservoir and Dam
19.6% full
Capacity
880.85 hm³
Volume stored
173 hm³
Vs month average
88% of normal
Coordinates
28.467°N, 98.167°W
Last updated
2026-10-27
Current fill
19.6%vs 7 days ago
-0.2 pplosing
vs 1 year ago
+9.7 ppyear-over-year
7-day trend
→stable
Drought context
Storage vs October average
88%of normal
19.6% full on 2026-10-27, against an average of 22.4% for October across 6 years of readings (-2.8 points).
Drought Monitor at this site · 20 October 2026
D3extreme drought
The ground at Choke Canyon Reservoir's coordinates falls inside the D3 area of the weekly U.S. Drought Monitor map. That describes local conditions — rainfall, soil moisture, streamflow — not the reservoir's storage. Texas drought figures →
Data source: BOR RISE — US Bureau of Reclamation — 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: 2026-10-27.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 28.467°N, 98.167°W · Open in Google Maps
About Choke Canyon Reservoir
As of October 27, 2026, Choke Canyon Reservoir is filled to 19.6% of its total capacity, holding 172.55 hm³ of water out of a maximum 880.85 hm³. At this level the reservoir is critically low.
Over the most recent week on record the fill level has held broadly steady (-0.2 pp), 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 — 1944 data points between October 29, 2021 and October 27, 2026 — the level has ranged from a low of 6.6% (May 17, 2026) to a high of 45.5% (October 29, 2021). On average the reservoir is fullest around April and at its lowest around February.
It is operated by BOR primarily for multiple purposes. It is at 28.467°N, 98.167°W.
Key facts
- Current fill level
- 19.6% of total capacity
- Water stored
- 172.55 hm³
- Total capacity
- 880.85 hm³
- 7-day change
- ▼ 0.2 pp
- Year-on-year
- ▲ 9.7 pp
- Primary use
- Multipurpose
- Operator
- BOR
- Coordinates
- 28.467°N, 98.167°W
- Last updated
- October 27, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 27 Oct 2026 | 19.6% | 172.55 |
| 26 Oct 2026 | 19.6% | 173.05 |
| 25 Oct 2026 | 19.7% | 173.18 |
| 24 Oct 2026 | 19.7% | 173.43 |
| 23 Oct 2026 | 19.7% | 173.68 |
| 22 Oct 2026 | 19.7% | 173.93 |
| 21 Oct 2026 | 19.8% | 174.05 |
| 20 Oct 2026 | 19.8% | 174.3 |
| 19 Oct 2026 | 19.8% | 174.56 |
| 18 Oct 2026 | 19.9% | 175.06 |
| 17 Oct 2026 | 19.9% | 175.31 |
| 16 Oct 2026 | 20.0% | 175.81 |