Reservoir · Massachusetts · United States · USGS NWIS
Quabbin Reservoir
77.5% full
Capacity
1,559.59 hm³
Volume stored
1209 hm³
Coordinates
42.300°N, 72.345°W
Last updated
2026-10-01
Current fill
77.5%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: 2026-10-01.
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 October 1, 2026, Quabbin Reservoir is filled to 77.5% of its total capacity, holding roughly 1,209 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 October 1, 2026 and October 1, 2026 — the level has ranged from a low of 77.5% (October 1, 2026) to a high of 77.5% (October 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
- 77.5%
- Water stored
- 1,209 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
- October 1, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 1 Oct 2026 | 77.5% | 1,209 |