Reservoir · Arizona · United States · USGS NWIS
BARTLETT RESERVOIR AT BARTLETT DAM, AZ
74.9% full
Capacity
219.56 hm³
Volume stored
164 hm³
Coordinates
33.818°N, 111.632°W
Last updated
2026-07-29
Current fill
74.9%vs 7 days ago
+0.2%gaining
vs 1 year ago
+8.4%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: 2026-07-29.
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 AT BARTLETT DAM, AZ
As of July 29, 2026, BARTLETT RESERVOIR AT BARTLETT DAM, AZ is filled to 74.9% of its total capacity, holding roughly 164 hm³ of water out of a maximum 220 hm³. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has held broadly steady (+0.2 pts), and it is 8.4 points above its level on the same date a year earlier.
Across the readings we hold for BARTLETT RESERVOIR AT BARTLETT DAM, AZ — 1445 data points between July 30, 2022 and July 29, 2026 — the level has ranged from a low of 38.7% (October 6, 2025) to a high of 100.1% (April 24, 2023). On average the reservoir is fullest around April and at its lowest around September.
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
- 74.9%
- Water stored
- 164 hm³
- Total capacity
- 220 hm³
- 7-day change
- ▲ 0.2 pts
- Year-on-year
- ▲ 8.4 pts
- Primary use
- Multipurpose
- River basin
- Arizona
- Operator
- USGS
- Coordinates
- 33.818°N, 111.632°W
- Last updated
- July 29, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 29 Jul 2026 | 74.9% | 164 |
| 28 Jul 2026 | 74.7% | 164 |
| 27 Jul 2026 | 74.5% | 164 |
| 26 Jul 2026 | 74.4% | 163 |
| 25 Jul 2026 | 74.2% | 163 |
| 24 Jul 2026 | 74.0% | 163 |
| 23 Jul 2026 | 73.9% | 162 |
| 22 Jul 2026 | 73.7% | 162 |
| 21 Jul 2026 | 73.5% | 161 |
| 20 Jul 2026 | 73.3% | 161 |
| 19 Jul 2026 | 73.1% | 160 |
| 18 Jul 2026 | 72.9% | 160 |
Frequently asked questions
What is the current water level of BARTLETT RESERVOIR AT BARTLETT DAM, AZ?
As of July 29, 2026, BARTLETT RESERVOIR AT BARTLETT DAM, AZ is at 74.9% of its capacity, holding approximately 164 hm³ of water, according to USGS NWIS data.
Is BARTLETT RESERVOIR AT BARTLETT DAM, AZ reservoir full?
No. As of July 29, 2026, BARTLETT RESERVOIR AT BARTLETT DAM, AZ is within its normal operating range at 74.9% of its capacity, so it is not full.
Is the water level at BARTLETT RESERVOIR AT BARTLETT DAM, AZ rising or falling?
The level at BARTLETT RESERVOIR AT BARTLETT DAM, AZ has been broadly stable over the latest week on record (+0.2 points).
How much water can BARTLETT RESERVOIR AT BARTLETT DAM, AZ hold?
BARTLETT RESERVOIR AT BARTLETT DAM, AZ has a total capacity of 220 hm³.
Where is BARTLETT RESERVOIR AT BARTLETT DAM, AZ reservoir located?
BARTLETT RESERVOIR AT BARTLETT DAM, AZ is located in Arizona, United States, within the Arizona basin (coordinates 33.818°N, 111.632°W).
What is BARTLETT RESERVOIR AT BARTLETT DAM, AZ used for?
BARTLETT RESERVOIR AT BARTLETT DAM, AZ is used primarily for multiple purposes, and is managed by USGS.