Reservoir · New Mexico · United States · USGS NWIS
Costilla Reservoir
5.4% full
Capacity
19.53 hm³
Volume stored
1 hm³
Coordinates
36.875°N, 105.280°W
Last updated
2026-08-13
Current fill
5.4%vs 7 days ago
0.0%stable
vs 1 year ago
-15.4%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: 2026-08-13.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 36.875, -105.280 · Open in Google Maps
About Costilla Reservoir
As of August 13, 2026, Costilla Reservoir is filled to 5.4% of its total capacity, holding roughly 1 hm³ of water out of a maximum 20 hm³. At this level the reservoir is critically low.
Over the most recent week on record the fill level has held broadly steady (+0.0 pts), and it is 15.4 points below its level on the same date a year earlier.
Across the readings we hold for Costilla Reservoir — 1461 data points between August 14, 2022 and August 13, 2026 — the level has ranged from a low of 4.3% (June 29, 2026) to a high of 75.8% (June 13, 2023). On average the reservoir is fullest around June and at its lowest around October.
It is operated by USGS primarily for multiple purposes. It lies within the New Mexico basin at 36.875°N, 105.280°W.
Key facts
- Current fill level
- 5.4%
- Water stored
- 1 hm³
- Total capacity
- 20 hm³
- 7-day change
- No change
- Year-on-year
- ▼ 15.4 pts
- Primary use
- Multipurpose
- River basin
- New Mexico
- Operator
- USGS
- Coordinates
- 36.875°N, 105.280°W
- Last updated
- August 13, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 13 Aug 2026 | 5.4% | 1 |
| 12 Aug 2026 | 5.4% | 1 |
| 11 Aug 2026 | 5.4% | 1 |
| 10 Aug 2026 | 5.3% | 1 |
| 9 Aug 2026 | 5.4% | 1 |
| 8 Aug 2026 | 5.4% | 1 |
| 7 Aug 2026 | 5.4% | 1 |
| 6 Aug 2026 | 5.4% | 1 |
| 5 Aug 2026 | 5.4% | 1 |
| 4 Aug 2026 | 5.4% | 1 |
| 3 Aug 2026 | 5.4% | 1 |
| 2 Aug 2026 | 5.5% | 1 |
Frequently asked questions
What is the current water level of Costilla Reservoir?
As of August 13, 2026, Costilla Reservoir is at 5.4% of its capacity, holding approximately 1 hm³ of water, according to USGS NWIS data.
Is Costilla Reservoir reservoir full?
No. As of August 13, 2026, Costilla Reservoir is critically low at 5.4% of its capacity, so it is not full.
Is the water level at Costilla Reservoir rising or falling?
The level at Costilla Reservoir has been broadly stable over the latest week on record (0.0 points).
How much water can Costilla Reservoir hold?
Costilla Reservoir has a total capacity of 20 hm³.
Where is Costilla Reservoir reservoir located?
Costilla Reservoir is located in New Mexico, United States, within the New Mexico basin (coordinates 36.875°N, 105.280°W).
What is Costilla Reservoir used for?
Costilla Reservoir is used primarily for multiple purposes, and is managed by USGS.