LivewellMassachusetts · Dedham County · River
Mother Brook (between Charles River and Knight Street Dam)
Is the fish you caught here safe to eat? Below is every consumption advisory on file for Mother Brook (between Charles River and Knight Street Dam), by species and size, in plain English — plus what's legal to keep.
3 species with advisories · contaminants: DDT, Mercury
Massachusetts also has statewide guidance
Massachusetts publishes rules that apply to rivers across the state — 1 recommendation covering 1 species — in addition to anything listed for Mother Brook (between Charles River and Knight Street Dam) below.
Strictest statewide rule: All Other Species — For women who may become pregnant, pregnant or breastfeeding women, and children under 15: do not eat due to elevated Mercury.
What's safe to eat from Mother Brook (between Charles River and Knight Street Dam)
Common Carp
| Size | Who | Guidance |
|---|---|---|
| All sizes | General population | Limit to two meals per month due to elevated DDT and Mercury. |
| Women who may become pregnant & children under 15 | For women who may become pregnant, pregnant or breastfeeding women, and children under 15: do not eat due to elevated DDT and Mercury. |
Source: official advisory· updated 2026-07-02
Largemouth Bass
| Size | Who | Guidance |
|---|---|---|
| All sizes | General population | Limit to two meals per month due to elevated DDT and Mercury. |
| Women who may become pregnant & children under 15 | For women who may become pregnant, pregnant or breastfeeding women, and children under 15: do not eat due to elevated DDT and Mercury. |
Source: official advisory· updated 2026-07-02
White Sucker
| Size | Who | Guidance |
|---|---|---|
| All sizes | General population | Limit to two meals per month due to elevated DDT and Mercury. |
| Women who may become pregnant & children under 15 | For women who may become pregnant, pregnant or breastfeeding women, and children under 15: do not eat due to elevated DDT and Mercury. |
Source: official advisory· updated 2026-07-02
How to prepare fish from Mother Brook (between Charles River and Knight Street Dam)
Some contaminants build up in fat and skin, so cleaning and cooking can lower your exposure. Others — mercury and PFAS — are in the muscle itself and trimming does nothing.
DDT
- Skin the fish — most of the contaminant sits in the fat just under the skin.
- Trim the fatty areas away: the belly flap, the top of the back, and the dark lateral line down each side.
- Cook on a rack — grill, broil, or bake — so the fat drips off the fillet.
- Throw the drippings out; don't use them for soup, sauce, or chowder.
- Choose smaller, younger fish — they've had less time to build it up.
Is it legal to keep?
These are Massachusetts's statewide limits — a water-specific rule may override them. Always verify the current regulations before keeping a fish.
| Species | Size | Daily limit | Open season | Keep season |
|---|---|---|---|---|
| Largemouth Bass | 12" min | 5 | Year-round | Same as open |
| Smallmouth Bass | 12" min | 5 | Year-round | Same as open |
| Northern Pike | 28" min | 2 | Year-round | Same as open |
| Chain Pickerel | 15" min | 5 | Year-round | Same as open |
| Walleye | 14" min | 5 | Year-round | Same as open |
| Inland Trout | — | 3 | Year-round | Same as open |
Official rules: Massachusetts — Massachusetts DFW
Getting on the water
- Milton Town Landing marina 3.1 mi Directions
- Boat ramp boat ramp 3.2 mi Directions
- Boat ramp boat ramp 3.2 mi Directions
- Boat ramp boat ramp 4.0 mi Directions
- Boat ramp boat ramp 4.1 mi Directions
- Boat ramp boat ramp 4.1 mi Directions
Access points from OpenStreetMap contributors.