Erosion Control: Cambridge vs Waltham
How do erosion control rules compare between Cambridge, MA and Waltham, MA?
Cambridge and Waltham have similar restriction levels.
Cambridge, MA
Middlesex County
Cambridge construction sites must install erosion and sediment controls under the Stormwater Ordinance and state Wetlands Protection Act, with silt fencing, inlet protection, and stabilized entrances required.
View full Cambridge rules →Waltham, MA
Middlesex County
Waltham requires erosion control measures on all construction sites disturbing over 1,000 square feet, with inspections by the Conservation Commission and Building Department.
View full Waltham rules →Key Facts Comparison
| Fact | Cambridge | Waltham |
|---|---|---|
| Trigger | 1 acre disturbance | - |
| BMPs | Silt fence, inlet protection | - |
| Stabilization | Within 14 days | Within 14 days |
| Wetlands law | MGL c.131 s.40 | - |
| Non-compliance | Stop-work order | - |
| Threshold | - | 1,000 square feet disturbance |
| Standard BMPs | - | Silt fence, inlet protection |
| Wetlands Buffer | - | 100 feet Con Com jurisdiction |
| Enforcement | - | DEP fines possible |
Highlighted rows indicate differences between cities.
Cambridge FAQ
What BMPs are required for a Cambridge construction site?
Silt fencing, inlet protection, stabilized entrances, and prompt stabilization of exposed soils at minimum.
Does the Conservation Commission review projects?
Yes, projects within 100 feet of wetlands or 200 feet of the Charles require filing under the Wetlands Protection Act.
Waltham FAQ
Do I need erosion controls for a small addition in Waltham?
If you are disturbing 1,000 square feet of soil or working near wetlands, yes. Smaller projects should still prevent mud tracking onto streets.
Who inspects erosion controls in Waltham?
The Building Department during construction inspections and the Conservation Commission for wetlands-adjacent projects. Complaints can trigger additional visits.
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