Erosion Control: Newton vs Somerville
How do erosion control rules compare between Newton, MA and Somerville, MA?
Newton and Somerville have similar restriction levels.
Newton, MA
Middlesex County
Newton requires erosion and sediment controls for any land disturbance over 5,000 sq ft or on slopes over 15%. Silt fences, hay bales, and stabilized construction entrances are mandatory.
View full Newton rules →Somerville, MA
Middlesex County
Construction sites in Somerville must install silt fence, stabilized entrances, and inlet protection before earthwork. Violations are $300 per day.
View full Somerville rules →Key Facts Comparison
| Fact | Newton | Somerville |
|---|---|---|
| Area Trigger | 5,000 sq ft | - |
| Slope Trigger | Over 15% | - |
| Temp Seeding | 14 days idle | - |
| Inspection Cycle | Weekly | - |
| Stabilization Goal | 70% cover | - |
| Design guide | - | MA Stormwater Handbook |
| Required BMPs | - | Silt fence, stabilized entry, inlet protection |
| Stabilization | - | 14 days for inactive areas |
| Wetland jurisdiction | - | 100 feet Conservation |
| Fine | - | $300 per day typical |
Highlighted rows indicate differences between cities.
Newton FAQ
Do I need silt fence for a home addition?
If your addition disturbs 5,000 sq ft or more of soil, or is on a slope over 15%, yes. Smaller projects may still need inlet protection on downhill catch basins.
What happens if my erosion controls fail?
DPW can issue stop-work orders, require immediate remediation, and fine up to $300 per day per violation. Sediment that enters storm drains triggers additional clean-up costs.
Somerville FAQ
Do I need erosion controls for a small home addition?
Yes if you are disturbing soil. At minimum install silt fence around stockpiles and protect nearby catch basins. Permit conditions will specify.
Who inspects erosion controls?
DPW Engineering inspects larger projects; ISD building inspectors flag BMP failures on smaller permits. Complaints can be filed via Somerville 311.
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