Maryland Department of the Environment

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General Discharge Permit

​General Permit For Discharges from Stormwater Associated with Industrial Activities
Maryland General Permit No. 20-SW

NOTICE - New Online Service Center​​​​

The Department now has the online Environmental Service Center, which applicants can use to easily submit new NOIs, modification requests, notice of terminations, and pay permit fees. 


It should be noted that at this time, all permitt​ees, regardless of what type of submission they make through the system, will need to sign and mail in a Signature Card, which can be found below:


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​Permit Training​​​​
The Department offers free training opportunities for several of its general permits.  Visit the WPPRP Training Website to sign up for an upcoming training event or to download information from past training events.  

20-SW Permit Information​

​Permit​

Forms

Guidance Documents

Supplemental Information​

The following documents include comments received on the 20SW and the 20SW remand, and the Department’s decision.​

Contact Info

If you have additional questions or would like more information, please contact the Industrial Stormwater Permits Division at (410) 537-3323.


Previous Permits​


Additional Information and Related L​inks



Maryland Department of the Environment
1800 Washington Blvd
Baltimore, MD 21230