Medford Drying After a Storm on the Upper Mystic
For most of the year a wet Medford basement is an ordinary drying job, and it is the large storm that changes the category of the water.
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Tell us what you can see, where the water came from, and whether anything is still wet. That is usually enough for us to say which trade you need, and whether the job is small enough to handle yourself, before anyone comes out.
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One outfall, half a mile above the Earhart Dam
Riverside Medford gets better news than most people expect. Only one treated combined sewer overflow discharge remains to the Upper Mystic, from the MWRA Somerville Marginal facility about half a mile upstream of the Amelia Earhart Dam, and state bacterial standards on that stretch are typically missed only during and after large storm events. So the water in an ordinary week is groundwater or rain, which dries, and the water after a big event is the one to handle as contaminated. That is why the first question on a Medford call is about the storm rather than about the basement: the answer decides whether equipment goes in or material comes out first.
What water damage drying involves in Medford
What to settle in the first hour on the Mystic
After a large one, two windows run at once and they both say 48 hours. Public health officials advise avoiding contact with the Alewife Brook and Upper Mystic River Basin during rain and for 48 hours afterwards, and the housing code gives the owner 48 hours from the leak or the end of the event to have all surfaces dry. Those pull against each other for anyone planning to bail out their own cellar. The other thing to weigh is what is down there, because eight of the nine claims this city has paid were on finished basements, so if yours is finished the first hour is about reaching the material behind the board rather than drying its surface.
Was there a large storm
Bacterial standards on this stretch are typically missed during and after big events. In a quiet week the same wet basement is an ordinary category of water.
Two 48 hour windows, opposite directions
One says dry it now. The other says stay out of contact with the river for two days. That is the case for equipment and gear rather than a bucket.
Finished means getting behind the board
Eight of nine claims here were finished basements. Drying the face of the drywall while the batt behind it stays wet achieves nothing.
The Upper Mystic discharge and Medford's claim record
The Alewife Brook release states that only one treated combined sewer overflow discharge remains to the Upper Mystic River, from the MWRA Somerville Marginal CSO facility, outfall MWR205A/SOM007A, located about half a mile upstream of the Amelia Earhart Dam just below the Route 28 bridge, and that state bacterial standards for the Upper Mystic are typically missed only during and after large storm events.
Source: City of Cambridge, Massachusetts Water Resources Authority and City of Somerville, accessed 2026-09-14
The same release states that because of increased health risks, public health officials recommend avoiding contact with the Alewife Brook and Upper Mystic River Basin during rain events and for a period of 48 hours following rainfall, and that contact with floodwaters should also be avoided.
Source: City of Cambridge, Massachusetts Water Resources Authority and City of Somerville, accessed 2026-09-14
FEMA's NFIP claims dataset records nine flood insurance claims for the City of Medford with loss years from 2001 to 2021 and about $70,000 in net payments. Four of the nine came from the March 2010 nor'easter and five of the nine were rated in flood zone AE. Eight of the nine were on properties with a finished basement or enclosure.
Source: Federal Emergency Management Agency, OpenFEMA NFIP Redacted Claims v2, accessed 2026-09-14
Wet after a big storm?
Tell us the date of the storm and we will categorize the water first.
Testing and removal after a Medford soaking
What Medford owners ask after the river comes up
The river came up. Is that water treated as dirty?
After a large storm, yes. Standards on the Upper Mystic are typically missed during and after big events, and officials advise avoiding contact with the river for 48 hours after rain. In a quiet week groundwater or rain in the same basement is handled as an ordinary drying job.
The drywall feels dry. Is it finished?
The face of a sheet dries long before the insulation behind it does, which is exactly how a finished basement ends up smelling two months later. Readings are taken in the cavity, not on the surface, and the job closes on those numbers rather than on how the room feels.
Tell us what the water was
River, rain or pipe changes everything that follows.