Reservoir · Massachusetts · United States · USGS NWIS
Quabbin Reservoir
79.1% full
Capacity
1,559.59 hm³
Volume stored
1234 hm³
Coordinates
42.300°N, 72.345°W
Last updated
2026-09-01
Current fill
79.1%vs 7 days ago
0.0%stable
vs 1 year ago
N/A7-day trend
→stable
Data source: USGS National Water Information System (NWIS) — daily reservoir storage volume. Design capacity is unavailable for this site, so fill % is estimated against the 5-year maximum storage and may overstate fullness. Last reading: 2026-09-01.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 42.300, -72.345 · Open in Google Maps
About Quabbin Reservoir
As of September 1, 2026, Quabbin Reservoir is filled to 79.1% of its total capacity, holding roughly 1,234 hm³ of water out of a maximum 1,560 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 (+0.0 pts).
Across the readings we hold for Quabbin Reservoir — 1 data points between September 1, 2026 and September 1, 2026 — the level has ranged from a low of 79.1% (September 1, 2026) to a high of 79.1% (September 1, 2026).
It is operated by MWRA primarily for water supply. It lies within the Massachusetts basin at 42.300°N, 72.345°W.
Key facts
- Current fill level
- 79.1%
- Water stored
- 1,234 hm³
- Total capacity
- 1,560 hm³
- 7-day change
- No change
- Primary use
- Water supply
- River basin
- Massachusetts
- Operator
- MWRA
- Coordinates
- 42.300°N, 72.345°W
- Last updated
- September 1, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 1 Sep 2026 | 79.1% | 1,234 |