Stormwater Management: Ayer vs Cambridge
How do stormwater management rules compare between Ayer, MA and Cambridge, MA?
Ayer and Cambridge have similar restriction levels.
Ayer, MA
Middlesex County
Stormwater follows the MA Wetlands Protection Act (MGL c.131 s.40), MassDEP Stormwater Standards, and municipal MS4 bylaws under the EPA NPDES permit.
View full Ayer rules →Cambridge, MA
Middlesex County
Cambridge requires stormwater management plans for construction disturbing one acre or more and implements strict post-construction standards to reduce flooding and protect the Charles River and Alewife watershed.
View full Cambridge rules →Key Facts Comparison
| Fact | Ayer | Cambridge |
|---|---|---|
| State act | MGL c.131 s.40 | - |
| Wetlands regs | 310 CMR 10.00 | - |
| MS4 permit | EPA NPDES | - |
| Buffer | 100 ft of wetlands | - |
| Trigger acre | CGP at 1 acre | - |
| Trigger | - | 1 acre disturbance |
| Standard | - | First inch treatment |
| Program | - | EPA MS4 Phase II |
| LID | - | Encouraged or required |
| Illicit discharge | - | Prohibited |
Highlighted rows indicate differences between cities.
Ayer FAQ
Who issues the local wetlands permit?
The municipal Conservation Commission, via a Notice of Intent filing.
Do small projects need stormwater BMPs?
Residential work may be exempt, but additions and new construction usually need at least infiltration measures.
Cambridge FAQ
When do I need a stormwater plan?
Projects disturbing one acre or more trigger the full stormwater plan; smaller projects in sensitive areas may also need review.
Can I discharge anything to the storm drain?
No, only clean stormwater; wash water, chemicals, and pool water are illicit discharges subject to fines.
Compare other topics
See how Ayer and Cambridge compare on other ordinance categories.
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