CWMP is in contact with PADEP Southeast Region office on status of MS4 plans and other regulatory requirements. This table shows the status of MS4 plans for municipalities in CWMP with a MS4 requirement as of 12/31/2020 from PADEP. It should not be considered definitive or official.
CWMP Members
| Name | CWMP Member | Permit status | Status/details | Approved | Approved on | Profile |
| Avondale Borough | Yes | Pending | revised maps approved in November, waiting on revised plan | No | Yes | |
| Birmingham Township | No | Pending | received response to letter, but no corrections to their TMDL plan. Needs further review and response. | No | -- | |
| Caln Township | Yes | Approved | issued 1/2019 | Yes | 2019-01-01 | -- |
| City of Coatesville | Yes | Approved | issued 11/25/2019 | Yes | 2019-11-25 | -- |
| Downingtown Borough | Yes | Pending | need to meet with municpality to discuss waiver | No | -- | |
| East Bradford Township | Yes | Approved | issued 08/11/2020 | Yes | 2020-08-11 | -- |
| East Brandywine Township | Yes | Approved | issued 8/6/2019 | Yes | 2019-08-06 | Yes |
| East Caln Township | Yes | Pending | Revised plan submitted but there was a minor calculation mistake that needs to be corrected. | No | -- | |
| East Fallowfield Township | Yes | Pending | revised maps approved in November, waiting on revised plan | No | Yes | |
| East Marlborough Township | No | Pending | received response to letter, but no corrections to their TMDL plan. Needs further review and response. | No | -- | |
| Franklin Township | Yes | Pending | revised TMDL/CBPRP received on 6/24/2019. | No | -- | |
| Honey Brook Borough | Yes | Pending | approved maps, working on plan | No | Honey Brook Borough profile | |
| Honey Brook Township | Yes | Pending | approved maps, working on plan | No | Honey Brook Township profile | |
| Kennett Square Borough | Yes | Approved | issued 03/16/2020 | Yes | 2020-03-16 | Yes |
| Kennett Township | Yes | Pending | waiting on revisions | No | -- | |
| London Britain Township | Yes | Pending | maps approved, waiting on revised plan | No | -- | |
| London Grove Township | Yes | Pending | waiting for revisions | No | -- | |
| Londonderry Township | Yes | Approved | issued 5/2019 | Yes | 2019-05-01 | -- |
| Modena Borough | Yes | Approved | issued 12/17/2020 | Yes | 2020-12-17 | -- |
| New Garden Township | Yes | Pending | waiting for revisions | No | -- | |
| New London Township | Yes | Pending | waiting for revisions | No | -- | |
| Newlin Township | No | Waived | Waived | 2018-05-01 | -- | |
| Parkesburg Borough | Yes | Approved | issued 5/26/2020 | Yes | 2020-05-26 | -- |
| Penn Township | Yes | Pending | revised maps approved in November, waiting on revised plan | No | -- | |
| Pennsbury Township | Yes | Pending | deficiency letter issued 9/14/18, waiting on revised TMDL plan. | No | -- | |
| Pocopson Township | Yes | No Information | No | Pocopson Township profile | ||
| Sadsbury Township | Yes | Pending | maps have been approved, waiting on revised plan | No | -- | |
| South Coatesville Borough | Yes | Approved | issued 7/2018 | Yes | 2018-07-01 | Yes |
| Thornbury Township | Yes | Pending | under review | No | -- | |
| Upper Uwchlan Township | Yes | Approved | issued 6/2018 | Yes | 2018-06-01 | -- |
| Uwchlan Township | Yes | Pending | revised plan submitted but not reviewed yet | No | -- | |
| Valley Township | Yes | Approved | issued 6/10/2020 | Yes | 2020-06-10 | -- |
| Wallace Township | No | Pending | TMDL Plan under review | No | -- | |
| West Bradford Township | Yes | Pending | reviewing revised mapping | No | -- | |
| West Brandywine Township | Yes | No Information | No | Yes | ||
| West Caln Township | Yes | Pending | TMDL Plan under review | No | -- | |
| West Chester Borough | Yes | Approved | issued 5/2019 | Yes | 2019-05-01 | -- |
| West Goshen Township | Yes | Approved | issued 8/2019 | Yes | 2019-08-01 | -- |
| West Grove Borough | Yes | Pending | revised map approved, waiting on revised plan | No | -- | |
| West Pikeland Township | Yes | Approved | issued 8/2019 | Yes | 2019-08-01 | -- |
| West Vincent Township | No | Waived | Waived | 2019-02-01 | -- | |
| West Whiteland Township | Yes | Pending | revised map has been reviewed, waiting for revised PRP | No | -- | |
| Westtown Township | Yes | Approved | issued 11/2019 | Yes | 2019-11-01 | Yes |