Stormwater Management: Cambridge vs Newton
How do stormwater management rules compare between Cambridge, MA and Newton, MA?
Cambridge and Newton 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 →Newton, MA
Middlesex County
Newton enforces MS4 stormwater permit requirements with infiltration systems required for new impervious surfaces over 1,000 sq ft. Illicit discharges to storm drains are prohibited.
View full Newton rules →Key Facts Comparison
| Fact | Cambridge | Newton |
|---|---|---|
| Trigger | 1 acre disturbance | - |
| Standard | First inch treatment | - |
| Program | EPA MS4 Phase II | - |
| LID | Encouraged or required | - |
| Illicit discharge | Prohibited | - |
| MS4 Permit | - | NPDES-MA010001 |
| Infiltration Trigger | - | 1,000 sq ft |
| SWPPP Threshold | - | 1 acre |
| Illicit Discharge Fine | - | Up to $5,000/day |
| Watershed | - | Charles River |
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.
Newton FAQ
What triggers stormwater review in Newton?
Creating more than 1,000 square feet of new impervious surface triggers DPW Engineering stormwater review. Projects disturbing over 1 acre also require state SWPPP filing.
Can I drain my pool to the storm drain?
No. Chlorinated or chemically-treated pool water is an illicit discharge. Dechlorinate water for 2-3 days and drain slowly to vegetated areas, or contact DPW for guidance.
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