The municipal stormwater permits generally cover cities and counties. However, there are other public entities (such as ports, prison complexes, parks and recreation districts, universities, or diking and drainage districts) that own or operate a stormwater sewer system located in a Phase I or Phase II city or county. These stormwater sewer systems are also known as municipal separate storm sewer systems (MS4). A public entity with an MS4 may be required to obtain a secondary municipal stormwater permit.
There are three basic steps:
If, upon reviewing the permit language, you determine that your MS4 does not require a permit from Ecology, then you do not need to take further action. If you are unsure, you should contact the regional MS4 Permit Manager.
Contact us for more information.
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