Stormwater Management: Mount Vernon vs Yonkers
How do stormwater management rules compare between Mount Vernon, NY and Yonkers, NY?
Mount Vernon and Yonkers have similar restriction levels.
Mount Vernon, NY
Westchester County
Mount Vernon is an MS4 community regulated under NYS DEC SPDES GP-0-15-003. City Stormwater Management Program restricts illicit discharges to storm sewers. Only rainwater may enter catch basins.
View full Mount Vernon rules →Yonkers, NY
Westchester County
Yonkers is an MS4 community under NYS DEC SPDES General Permit GP-0-15-003. Illicit discharges to storm drains are prohibited; new development must meet NYS Stormwater Management Design Manual standards.
View full Yonkers rules →Key Facts Comparison
| Fact | Mount Vernon | Yonkers |
|---|---|---|
| Status | Regulated MS4 | - |
| Permit | NYSDEC GP-0-15-003 | SPDES GP-0-15-003 |
| Illicit Discharge | Prohibited | - |
| Design Standard | NYSDEC Stormwater Manual | - |
| MS4 | - | Regulated community |
| Design Manual | - | NYS Stormwater |
| Discharge | - | Stormwater only |
| Fine | - | Up to $1,000 |
Highlighted rows indicate differences between cities.
Mount Vernon FAQ
Can I drain my pool into the street?
No. Chlorinated pool water must be dechlorinated and drained to sanitary sewer or a grassed area on your property.
Does my new construction project need stormwater controls?
Yes if disturbance is 1+ acre — a SWPPP under NYSDEC GP-0-15-003 and design per the NYSDEC Stormwater Manual are required.
Can I wash my car and let soapy water run to the storm drain?
No. Wash water is an illicit discharge under Mount Vernon's MS4 program — wash on grass or at a commercial wash bay.
Yonkers FAQ
Can I dump soapy car wash water in the street?
No. That is an illicit discharge under Yonkers' MS4 program and NYS DEC regulations, punishable by fines up to $1,000.
Is Yonkers regulated under NYS stormwater rules?
Yes. Yonkers is an MS4 community regulated under NYS DEC SPDES General Permit GP-0-15-003, with an Illicit Discharge Detection and Elimination (IDDE) program.
What stormwater standards apply to Yonkers construction?
Projects disturbing 1+ acre must implement green infrastructure per the NYS Stormwater Management Design Manual and submit a Stormwater Pollution Prevention Plan (SWPPP).
Compare other topics
See how Mount Vernon and Yonkers 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