Blackstone River HUC8 01090003
A 1,229 km² sub-basin of the New England region in MA, RI. Drought coverage is from the US Drought Monitor (map of 2026-10-13); streamflow classes place each USGS gauge's latest reading against its own day-of-year record.
Health score
80
Healthy
Drought index
0
None
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
14%
of 7 reporting
Median flow
94%
p46 of record
Water assets
3,519
1 springs · 1,583 wells
USGS gauges (9)
- BLACKSTONE RIVER, W. MAIN ST., AT MILLBURY, MA0110973093 cfsp24 · below normal
- BLACKSTONE RIVER, RT 122 BRIDGE NEAR UXBRIDGE, MA01111212261 cfsp42 · normal
- NIPMUC RIVER NEAR HARRISVILLE, RI011113007 cfsp45 · normal
- BLACKSTONE R AT ROOSEVELT ST AT PAWTUCKET RI01113895531 cfsp46 · normal
- BRANCH RIVER AT FORESTDALE, RI01111500109 cfsp59 · normal
- BLACKSTONE RIVER AT WOONSOCKET, RI01112500452 cfsp61 · normal
- QUINSIGAMOND RIVER AT NORTH GRAFTON, MA0111000023 cfsp70 · normal
- BLACKSTONE RIVER AT NORTHBRIDGE, MA011105001,010 cfsno long-term record
- WEST RIVER BELOW WEST HILL DAM, NR UXBRIDGE, MA011112002 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-21 | 0 | 0 | 1/7 | p46 |
| 2026-10-20 | 0 | 0 | 0/7 | p58 |
| 2026-10-19 | 0 | 0 | 0/7 | p64 |
| 2026-10-18 | 0 | 0 | 0/7 | p63 |
| 2026-10-17 | 0 | 0 | 0/7 | p67 |
| 2026-10-16 | 0 | 0 | 0/7 | p59 |
| 2026-10-15 | 0 | 0 | 0/7 | p66 |
| 2026-10-14 | 0 | 0 | 0/7 | p80 |
| 2026-10-13 | 0 | 0 | 0/7 | p87 |
| 2026-10-12 | 0 | 0 | 0/7 | p78 |
| 2026-10-11 | 0 | 0 | 2/7 | p31 |
| 2026-10-10 | 0 | 0 | 1/7 | p31 |
| 2026-10-09 | 0 | 0 | 1/7 | p35 |
| 2026-10-08 | 0 | 0 | 0/7 | p42 |
Top water assets
- 66Ocean State Powerreservoir
- 66Diamond Hill Reservoirreservoir
- 66Harris Pondreservoir
- 66West Hill Damreservoir
- 66Woonsocket Reservoir # 1reservoir
- 66Valley Fallsreservoir
- 66Pawtucket Reservoirreservoir
- 65Coes Lower Pond Damreservoir
- 65Ironstone Reservoir Damreservoir
- 65Singletary Brookriver