Stormwater Management: Cambridge vs Lowell
How do stormwater management rules compare between Cambridge, MA and Lowell, MA?
Cambridge and Lowell have similar restriction levels.
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 →Lowell, MA
Middlesex County
Lowell enforces a local Stormwater Management Ordinance under its MS4 permit, requiring erosion controls and on-site management for projects over 1 acre or 5,000 square feet of disturbance.
View full Lowell rules →Key Facts Comparison
| Fact | Cambridge | Lowell |
|---|---|---|
| Trigger | 1 acre disturbance | - |
| Standard | First inch treatment | - |
| Program | EPA MS4 Phase II | - |
| LID | Encouraged or required | - |
| Illicit discharge | Prohibited | Prohibited |
| Permit authority | - | EPA MS4 NPDES |
| Permit threshold | - | 5,000 sq ft disturbance |
| TSS removal | - | 80 percent |
Highlighted rows indicate differences between cities.
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.
Lowell FAQ
Do I need a stormwater permit for a new driveway?
Only if the combined disturbance exceeds 5,000 square feet. Smaller projects still must avoid directing runoff onto neighbors or streets.
Can I wash my car in the driveway?
Occasional residential car washing is allowed, but commercial washing that discharges to the storm drain is considered an illicit discharge.
Compare other topics
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