Erosion Control: Mount Vernon vs New Rochelle
How do erosion control rules compare between Mount Vernon, NY and New Rochelle, NY?
Mount Vernon and New Rochelle have similar restriction levels.
Mount Vernon, NY
Westchester County
Soil erosion and sediment control required on land-disturbing activities per NYS DEC SPDES general permit (GP-0-20-001) for 1+ acre sites. City enforces stormwater/erosion standards at building permit review.
View full Mount Vernon rules →New Rochelle, NY
Westchester County
New Rochelle requires erosion and sediment control for land disturbance activities. Projects disturbing 1+ acres require NYS SPDES General Permit (GP-0-20-001) with SWPPP. City enforces NYS Standards and Specifications for Erosion and Sediment Control.
View full New Rochelle rules →Key Facts Comparison
| Fact | Mount Vernon | New Rochelle |
|---|---|---|
| Threshold | 1 acre triggers SPDES | 1+ acre disturbance |
| SWPPP | Required 1+ acre | Required |
| Standard | NY Blue Book 2016 | - |
| Review | Building Department | - |
| State Permit | - | SPDES GP-0-20-001 |
| CEHA | - | Exposed shoreline areas |
Highlighted rows indicate differences between cities.
Mount Vernon FAQ
Do I need erosion controls for a small addition?
Typically silt fence and inlet protection are required even for small projects at plan review.
When does a full SWPPP become mandatory?
At 1 or more acres of disturbance — a SWPPP and Notice of Intent to NYS DEC are required under the SPDES permit.
What standard does Mount Vernon use for erosion controls?
The NY Standards and Specifications for Erosion and Sediment Control (2016 Blue Book), enforced at Building Department review.
New Rochelle FAQ
Do I need erosion control for a home addition?
Silt fencing and inlet protection are typically required. Projects under 1 acre still need basic controls per city code.
When does a New Rochelle project need a SWPPP?
When construction disturbs 1 acre or more. At that point, NYS SPDES General Permit GP-0-20-001 applies and a Stormwater Pollution Prevention Plan is required.
Is my New Rochelle waterfront lot in a Coastal Erosion Hazard Area?
Some exposed Long Island Sound shoreline parcels are within a CEHA. Check the NYS DEC coastal erosion hazard maps and expect Article 34 review for construction.
Compare other topics
See how Mount Vernon and New Rochelle compare on other ordinance categories.
Want to add a third city?
Use our full comparison tool to compare up to three cities.
Open Comparison Tool