Reservoir · Arizona · United States · USGS NWIS
Bartlett Reservoir
81.9% full
Capacity
219.56 hm³
Volume stored
180 hm³
Coordinates
33.818°N, 111.632°W
Last updated
2026-09-30
Current fill
81.9%vs 7 days ago
+1.3%gaining
vs 1 year ago
+41.9%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: 2026-09-30.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 33.818, -111.632 · Open in Google Maps
About Bartlett Reservoir
As of September 30, 2026, Bartlett Reservoir is filled to 81.9% of its total capacity, holding roughly 180 hm³ of water out of a maximum 220 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (+1.3 pts), and it is 41.9 points above its level on the same date a year earlier.
Across the readings we hold for Bartlett Reservoir — 1461 data points between October 1, 2022 and September 30, 2026 — the level has ranged from a low of 38.1% (August 21, 2025) to a high of 100.1% (April 24, 2023). On average the reservoir is fullest around April and at its lowest around October.
It is operated by USGS primarily for multiple purposes. It lies within the Arizona basin at 33.818°N, 111.632°W.
Key facts
- Current fill level
- 81.9%
- Water stored
- 180 hm³
- Total capacity
- 220 hm³
- 7-day change
- ▲ 1.3 pts
- Year-on-year
- ▲ 41.9 pts
- Primary use
- Multipurpose
- River basin
- Arizona
- Operator
- USGS
- Coordinates
- 33.818°N, 111.632°W
- Last updated
- September 30, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 30 Sep 2026 | 81.9% | 180 |
| 29 Sep 2026 | 81.7% | 179 |
| 28 Sep 2026 | 81.5% | 179 |
| 27 Sep 2026 | 81.2% | 178 |
| 26 Sep 2026 | 81.1% | 178 |
| 25 Sep 2026 | 81.0% | 178 |
| 24 Sep 2026 | 80.8% | 178 |
| 23 Sep 2026 | 80.6% | 177 |
| 22 Sep 2026 | 80.6% | 177 |
| 21 Sep 2026 | 80.4% | 177 |
| 20 Sep 2026 | 80.2% | 176 |
| 19 Sep 2026 | 80.1% | 176 |