Flow report
Massachusetts streamflow
Live discharge, gauge height, water temperature, and percent-of-normal readings from every USGS streamgauge in Massachusetts. Built for paddlers, anglers, water managers, and flood researchers.
USGS gauges
78
State percent normal
66%
Paddle runs
0
Updated
Jul 16
Open the Massachusetts flow layer on the map
Every USGS streamgauge filtered to Massachusetts.
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July
16
2026
Flow briefing
Streamflow levels across Massachusetts are currently 66% of normal, with the Connecticut R At Interstate 391 Bridge At Holyoke reporting the highest discharge in the state at 4,080 cfs and a gauge stage of 5.10 ft.
Meanwhile, the Deerfield River At Charlemont is seeing a spike today — up 202% since yesterday and currently running near peak.
Tap any gauge below for the full hydrograph, paired weather forecast, and historical context. Use the rivers panel to jump into Massachusetts's named rivers.
River levels near Massachusetts towns
Active weather warnings for Massachusetts
# Massachusetts Storm Center Report
Massachusetts remains under an Air Quality Alert for Fine Particulates effective through midnight Thursday, July 16th, issued by the Massachusetts Department of Environmental Protection. Wildfire smoke from Canada is creating hazy skies and unhealthy air conditions across the state, including major population centers like Boston, Worcester, and Springfield. Sensitive groups—children and adults with asthma, lung or heart disease, and older adults—should limit prolonged outdoor activity. Fine Particulate concentrations may approach or exceed unhealthy levels. Residents are urged to monitor air quality updates at mass.gov/dep/massair/forecast and take appropriate precautions to protect their health during this period.
Massachusetts remains under an Air Quality Alert for Fine Particulates effective through midnight Thursday, July 16th, issued by the Massachusetts Department of Environmental Protection. Wildfire smoke from Canada is creating hazy skies and unhealthy air conditions across the state, including major population centers like Boston, Worcester, and Springfield. Sensitive groups—children and adults with asthma, lung or heart disease, and older adults—should limit prolonged outdoor activity. Fine Particulate concentrations may approach or exceed unhealthy levels. Residents are urged to monitor air quality updates at mass.gov/dep/massair/forecast and take appropriate precautions to protect their health during this period.
Massachusetts at a glance
State-wide streamflow overview
The Massachusetts flow picture in four data points -- where the state sits versus historical norms, what's flowing hardest, and what's spiking fastest.
Percent of normal
66%
100% is the historical norm. Below 70% indicates drought; above 130% can flag elevated flood risk.
Highest discharge
Connecticut R At Interstate 391 Bridge At Holyoke
4,080 cfs
Gauge stage 5.10 ft
Biggest 24h spike
Deerfield River At Charlemont
+202%
Now 737 cfs
Network coverage
Gauges + rivers tracked
78 + 0
USGS gauges feeding 0 named rivers in Massachusetts.
Full streamgauge inventory
Massachusetts USGS streamgauges
Every USGS gauge Snoflo tracks in Massachusetts. Sortable, quickly filterable. Numeric columns heat-mapped from light to deep. Tap any gauge for its full hydrograph and forecast.
| Streamgage | Streamflow | Gage height | Water temp | Air temp | Elevation | Watershed |
|---|---|---|---|---|---|---|
|
Connecticut R At Interstate 391 Bridge At Holyoke, Ma
1 day ago · USGS 01172010 |
4,390 cfs | 5.23 ft | · | 82°F | 43 ft | Middle Connecticut |
|
Merrimack River Bl Concord River At Lowell, Ma
1 day ago · USGS 01100000 |
2,400 cfs | 42.22 ft | · | 82°F | 50 ft | Merrimack |
|
Connecticut River At Montague City, Ma
1 day ago · USGS 01170500 |
1,990 cfs | 6.38 ft | · | 81°F | 111 ft | Middle Connecticut |
|
Deerfield River At Charlemont, Ma
1 day ago · USGS 01168500 |
932 cfs | 3.11 ft | · | 77°F | 517 ft | Deerfield |
|
Deerfield River Near West Deerfield, Ma
1 day ago · USGS 01170000 |
749 cfs | 2.73 ft | · | 80°F | 157 ft | Deerfield |
|
Chicopee River At Indian Orchard, Ma
1 day ago · USGS 01177000 |
246 cfs | 4.16 ft | · | 82°F | 126 ft | Chicopee |
|
Housatonic River Nr Ashley Falls, Ma
1 day ago · USGS 01198125 |
226 cfs | 1.96 ft | · | 84°F | 646 ft | Housatonic |
|
Millers River At Erving, Ma
1 day ago · USGS 01166500 |
199 cfs | 2.12 ft | · | 79°F | 378 ft | Miller |
|
Housatonic River Near Great Barrington, Ma
1 day ago · USGS 01197500 |
173 cfs | 1.94 ft | · | 83°F | 693 ft | Housatonic |
|
Concord R Below R Meadow Brook, Ma
1 day ago · USGS 01099500 |
142 cfs | 4.19 ft | · | 83°F | 67 ft | Merrimack |
|
Westfield River Near Westfield, Ma
1 day ago · USGS 01183500 |
111 cfs | 3.06 ft | · | 83°F | 140 ft | Westfield |
|
Nashua River At East Pepperell, Ma
12 hours ago · USGS 01096500 |
106 cfs | · | · | 83°F | 165 ft | Nashua |
|
Charles River At Dover, Ma
1 day ago · USGS 01103500 |
82 cfs | · | · | 83°F | 93 ft | Charles |
|
Taunton River Near Bridgewater, Ma
13 hours ago · USGS 01108000 |
78 cfs | 3.17 ft | 62°F | 84°F | 10 ft | Narragansett |
|
Hoosic River Near Williamstown, Ma
1 day ago · USGS 01332500 |
78 cfs | 5.36 ft | · | 80°F | 618 ft | Hudson-Hoosic |
|
Neponset River At Milton Village, Ma
1 day ago · USGS 011055566 |
71 cfs | 1.25 ft | · | 83°F | 5 ft | Charles |
|
Charles River At Waltham, Ma
1 day ago · USGS 01104500 |
65 cfs | 1.00 ft | · | 83°F | 16 ft | Charles |
|
Quaboag River At West Brimfield, Ma
1 day ago · USGS 01176000 |
59 cfs | 2.69 ft | · | 81°F | 388 ft | Chicopee |
|
Ware River At Gibbs Crossing, Ma
1 day ago · USGS 01173500 |
57 cfs | 2.05 ft | · | 81°F | 380 ft | Chicopee |
|
Charles River At Wellesley, Ma
1 day ago · USGS 01104200 |
54 cfs | 2.88 ft | · | 83°F | 67 ft | Charles |
|
Westfield River At Knightville, Ma
1 day ago · USGS 01179500 |
53 cfs | 2.73 ft | · | 79°F | 464 ft | Westfield |
|
Blackstone River, Ma
13 hours ago · USGS 01109730 |
51 cfs | 1.66 ft | · | 82°F | 382 ft | Blackstone |
|
North Nashua River Near Leominster, Ma
1 day ago · USGS 01094500 |
47 cfs | 2.03 ft | · | 81°F | 274 ft | Nashua |
|
Swift River At West Ware, Ma
1 day ago · USGS 01175500 |
47 cfs | 2.17 ft | · | 81°F | 370 ft | Chicopee |
|
Quinebaug R Bl Westville Dam Nr Southbridge, Ma
1 day ago · USGS 01123600 |
45 cfs | 3.48 ft | · | 80°F | 513 ft | Quinebaug |
|
Hoosic River At Adams, Ma
1 day ago · USGS 01331500 |
40 cfs | 5.81 ft | · | 81°F | 831 ft | Hudson-Hoosic |
|
Assabet River At Maynard, Ma
1 day ago · USGS 01097000 |
34 cfs | 1.51 ft | · | 82°F | 154 ft | Concord |
|
Mother Brook At Dedham, Ma
1 day ago · USGS 01104000 |
32 cfs | 80.60 ft | · | 83°F | 87 ft | Charles |
|
Ipswich River Near Ipswich, Ma
1 day ago · USGS 01102000 |
30 cfs | 2.96 ft | · | 82°F | 21 ft | Charles |
|
Quinebaug R Bl E Brimfield Dam At Fiskdale, Ma
1 day ago · USGS 01123360 |
30 cfs | 2.45 ft | · | 80°F | 614 ft | Quinebaug |
|
North River At Shattuckville, Ma
1 day ago · USGS 01169000 |
30 cfs | 1.36 ft | · | 78°F | 459 ft | Deerfield |
|
West Branch Westfield River At Huntington, Ma
1 day ago · USGS 01181000 |
23 cfs | 3.07 ft | · | 80°F | 391 ft | Westfield |
|
Stony Brook At Rt 20 At Waltham, Ma
13 hours ago · USGS 01104460 |
23 cfs | 5.26 ft | 74°F | 83°F | 87 ft | Charles |
|
West Branch Farmington River Near New Boston, Ma
1 day ago · USGS 01185500 |
23 cfs | 2.28 ft | · | 79°F | 776 ft | Farmington |
|
East Branch Housatonic River At Coltsville, Ma
1 day ago · USGS 01197000 |
23 cfs | · | · | 80°F | 996 ft | Housatonic |
|
Hobbs Bk Below Cambridge Res Nr Kendall Green, Ma
12 hours ago · USGS 01104430 |
23 cfs | 1.27 ft | 77°F | 83°F | 145 ft | Charles |
|
Charles River At Medway, Ma
13 hours ago · USGS 01103280 |
22 cfs | · | · | 83°F | 129 ft | Charles |
|
Green River At Williamstown, Ma
1 day ago · USGS 01333000 |
22 cfs | 1.61 ft | · | 81°F | 614 ft | Hudson-Hoosic |
|
Neponset River At Greenlodge St Near Canton, Ma
1 day ago · USGS 01105554 |
22 cfs | 6.53 ft | · | 83°F | 46 ft | Charles |
|
Threemile River At North Dighton, Ma
1 day ago · USGS 01109060 |
21 cfs | 2.36 ft | · | 85°F | 12 ft | Narragansett |
|
Paskamanset River Near South Dartmouth, Ma
1 day ago · USGS 01105933 |
19 cfs | 8.72 ft | · | 80°F | 29 ft | Cape Cod |
|
Ware River At Intake Works Near Barre, Ma
1 day ago · USGS 01173000 |
19 cfs | 3.19 ft | 75°F | 80°F | 639 ft | Chicopee |
|
Quashnet River At Waquoit Village, Ma
1 day ago · USGS 011058837 |
15 cfs | 2.05 ft | · | 78°F | 3 ft | Cape Cod |
|
Neponset River At Norwood, Ma
1 day ago · USGS 01105000 |
15 cfs | 5.81 ft | · | 83°F | 51 ft | Charles |
|
Green River Near Great Barrington, Ma
1 day ago · USGS 01198000 |
14 cfs | · | · | 84°F | 694 ft | Housatonic |
|
Shawsheen River Near Wilmington, Ma
1 day ago · USGS 01100600 |
14 cfs | 2.21 ft | · | 83°F | 95 ft | Merrimack |
|
Green River Near Colrain, Ma
1 day ago · USGS 01170100 |
13 cfs | 2.54 ft | 45°F | 79°F | 436 ft | Deerfield |
|
Squannacook River Near West Groton, Ma
1 day ago · USGS 01096000 |
12 cfs | 1.45 ft | · | 82°F | 246 ft | Nashua |
|
Otter River At Otter River, Ma
11 hours ago · USGS 01163200 |
12 cfs | · | · | 78°F | 901 ft | Miller |
|
Jones River At Kingston, Ma
1 day ago · USGS 01105870 |
11 cfs | 2.91 ft | · | 83°F | 8 ft | Cape Cod |
|
Indian Head River At Hanover, Ma
1 day ago · USGS 01105730 |
11 cfs | 1.40 ft | · | 83°F | 8 ft | Cape Cod |
|
Mill River At Northampton, Ma
1 day ago · USGS 01171500 |
10 cfs | 5.41 ft | · | 82°F | 205 ft | Middle Connecticut |
|
North Nashua River At Fitchburg, Ma
1 day ago · USGS 01094400 |
10 cfs | 2.15 ft | · | 80°F | 399 ft | Nashua |
|
Quinsigamond River At North Grafton, Ma
1 day ago · USGS 01110000 |
9 cfs | 1.07 ft | · | 82°F | 349 ft | Blackstone |
|
Sudbury River At Saxonville, Ma
1 day ago · USGS 01098530 |
9 cfs | 4.17 ft | · | 87°F | 116 ft | Concord |
|
South River Near Conway, Ma
1 day ago · USGS 01169900 |
9 cfs | 1.40 ft | · | 79°F | 456 ft | Deerfield |
|
Wading River Near Norton, Ma
1 day ago · USGS 01109000 |
8 cfs | 5.17 ft | · | 84°F | 63 ft | Narragansett |
|
Millers River Near Winchendon, Ma
13 hours ago · USGS 01162000 |
8 cfs | 3.74 ft | · | 79°F | 834 ft | Miller |
|
Aberjona River At Winchester, Ma
1 day ago · USGS 01102500 |
8 cfs | 7.05 ft | · | 83°F | 14 ft | Charles |
|
Ware River Near Barre, Ma
1 day ago · USGS 01172500 |
7 cfs | 2.38 ft | · | 80°F | 738 ft | Chicopee |
|
Quinapoxet River At Canada Mills Near Holden, Ma
1 day ago · USGS 01095375 |
7 cfs | 6.39 ft | 77°F | 80°F | 569 ft | Nashua |
|
East Branch Neponset River At Canton, Ma
1 day ago · USGS 01105500 |
6 cfs | · | 79°F | 83°F | 80 ft | Charles |
|
Saugus R At Saugus Iron Works At Saugus, Ma
1 day ago · USGS 01102345 |
6 cfs | 1.37 ft | · | 82°F | 14 ft | Charles |
|
Ipswich River At South Middleton, Ma
13 hours ago · USGS 01101500 |
6 cfs | 2.00 ft | · | 83°F | 49 ft | Charles |
|
East Branch Swift River Near Hardwick, Ma
1 day ago · USGS 01174500 |
5 cfs | 19.34 ft | · | 80°F | 520 ft | Chicopee |
|
Lake Cochituate Outlet At Framingham, Ma
1 day ago · USGS 01098500 |
5 cfs | 1.96 ft | · | 83°F | 129 ft | Concord |
|
Stillwater River Near Sterling, Ma
12 hours ago · USGS 01095220 |
4 cfs | 3.84 ft | 68°F | 81°F | 403 ft | Nashua |
|
Herring River At North Harwich, Ma
1 day ago · USGS 01105880 |
3 cfs | 1.92 ft | · | 70°F | 21 ft | Cape Cod |
|
Priest Brook Near Winchendon, Ma
20 hours ago · USGS 01162500 |
3 cfs | 2.32 ft | · | 79°F | 852 ft | Miller |
|
Parker River At Byfield, Ma
1 day ago · USGS 01101000 |
3 cfs | · | · | 83°F | 25 ft | Charles |
|
West Branch Swift River Near Shutesbury, Ma
1 day ago · USGS 01174565 |
2 cfs | 1.08 ft | · | 80°F | 536 ft | Chicopee |
|
Nashoba Brook Near Acton, Ma
13 hours ago · USGS 01097300 |
2 cfs | 3.38 ft | · | 82°F | 155 ft | Concord |
|
Whitmans Pond, Ma
13 hours ago · USGS 01105606 |
1 cfs | 71.89 ft | · | 84°F | 75 ft | Charles |
|
Whitmans Pond Fish Ladder At East Weymouth, Ma
1 day ago · USGS 01105608 |
1 cfs | 31.34 ft | · | 84°F | 52 ft | Charles |
|
Sevenmile River Near Spencer, Ma
1 day ago · USGS 01175670 |
1 cfs | 9.17 ft | · | 80°F | 650 ft | Chicopee |
|
Segreganset River Near Dighton, Ma
1 day ago · USGS 01109070 |
0 cfs | 1.64 ft | · | 85°F | 36 ft | Narragansett |
|
Old Swamp River Near South Weymouth, Ma
1 day ago · USGS 01105600 |
0 cfs | 2.43 ft | · | 84°F | 87 ft | Cape Cod |
|
Stony Brook Reservoir At Dam Near Waltham, Ma
13 hours ago · USGS 01104480 |
0 cfs | · | 36°F | 83°F | 62 ft | Charles |
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Flow report FAQ
About Massachusetts streamflow
Where does the Massachusetts streamflow data come from?
The U.S. Geological Survey National Water Information System. USGS streamgauges report continuously (every 15 minutes) and the data is the canonical real-time record for U.S. rivers. Snoflo pulls the latest readings and joins them to a 7-day NOAA weather forecast for each station.
What is cfs?
Cubic feet per second — the standard unit for streamflow. One cfs is about 7.5 gallons per second. Small creeks run at single-digit cfs; the Mississippi at hundreds of thousands.
What does Gauge Height mean?
The water level at the gauge in feet above the reference datum. Used together with discharge to track river state. Flood stage and runnable levels are typically expressed in gauge height (e.g., "flood at 16 ft").
How fresh is the Massachusetts data?
USGS streamgauges report every 15 minutes; Snoflo re-pulls throughout the day. The AI briefing regenerates daily.
Can I get a flow alert for a Massachusetts gauge?
Yes. Save any USGS gauge as a favorite in the Snoflo iOS app, set a discharge or stage threshold (e.g. "alert me when discharge crosses 2,000 cfs"), and you'll get a push the moment it crosses.
Is this a substitute for an NWS flood warning?
No. Snoflo is informational. For flood life-safety decisions always follow guidance from your local NWS forecast office and state emergency management. Snoflo data is one input among several.
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