Reservoir · Texas · United States · USGS NWIS
Medina Lk nr San Antonio, TX
29.4% full
Capacity
314.34 hm³
Volume stored
92 hm³
Coordinates
29.540°N, 98.934°W
Last updated
2026-07-29
Current fill
29.4%vs 7 days ago
+0.2%gaining
vs 1 year ago
+25.5%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: 2026-07-29.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 29.540, -98.934 · Open in Google Maps
About Medina Lk nr San Antonio, TX
As of July 29, 2026, Medina Lk nr San Antonio, TX is filled to 29.4% of its total capacity, holding roughly 92 hm³ of water out of a maximum 314 hm³. At this level the reservoir is low.
Over the most recent week on record the fill level has held broadly steady (+0.2 pts), and it is 25.5 points above its level on the same date a year earlier.
Across the readings we hold for Medina Lk nr San Antonio, TX — 1461 data points between July 30, 2022 and July 29, 2026 — the level has ranged from a low of 1.9% (May 21, 2025) to a high of 29.4% (July 29, 2026). On average the reservoir is fullest around July and at its lowest around May.
It is operated by USGS primarily for multiple purposes. It lies within the Texas basin at 29.540°N, 98.934°W.
Key facts
- Current fill level
- 29.4%
- Water stored
- 92 hm³
- Total capacity
- 314 hm³
- 7-day change
- ▲ 0.2 pts
- Year-on-year
- ▲ 25.5 pts
- Primary use
- Multipurpose
- River basin
- Texas
- Operator
- USGS
- Coordinates
- 29.540°N, 98.934°W
- Last updated
- July 29, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 29 Jul 2026 | 29.4% | 92 |
| 28 Jul 2026 | 29.2% | 92 |
| 27 Jul 2026 | 29.1% | 92 |
| 26 Jul 2026 | 29.0% | 91 |
| 25 Jul 2026 | 28.8% | 91 |
| 24 Jul 2026 | 28.6% | 90 |
| 23 Jul 2026 | 28.4% | 89 |
| 22 Jul 2026 | 28.2% | 89 |
| 21 Jul 2026 | 27.8% | 88 |
| 20 Jul 2026 | 27.5% | 86 |
| 19 Jul 2026 | 27.0% | 85 |
| 18 Jul 2026 | 26.3% | 83 |
Frequently asked questions
What is the current water level of Medina Lk nr San Antonio, TX?
As of July 29, 2026, Medina Lk nr San Antonio, TX is at 29.4% of its capacity, holding approximately 92 hm³ of water, according to USGS NWIS data.
Is Medina Lk nr San Antonio, TX reservoir full?
No. As of July 29, 2026, Medina Lk nr San Antonio, TX is low at 29.4% of its capacity, so it is not full.
Is the water level at Medina Lk nr San Antonio, TX rising or falling?
The level at Medina Lk nr San Antonio, TX has been broadly stable over the latest week on record (+0.2 points).
How much water can Medina Lk nr San Antonio, TX hold?
Medina Lk nr San Antonio, TX has a total capacity of 314 hm³.
Where is Medina Lk nr San Antonio, TX reservoir located?
Medina Lk nr San Antonio, TX is located in Texas, United States, within the Texas basin (coordinates 29.540°N, 98.934°W).
What is Medina Lk nr San Antonio, TX used for?
Medina Lk nr San Antonio, TX is used primarily for multiple purposes, and is managed by USGS.