This table shows the status of PADEP MS4 permits for municipalities in CWMP with a MS4 requirement. This list should not be considered definitive or official; it is only updated periodically.
Name |
CWMP Member | Fee Category | Status | Issued | Effective | Expires |
| Avondale Borough | Yes | MS4 Individual Permit | Active | 2023-05-01 | 2023-05-01 | 2028-04-30 |
| Birmingham Township | Yes | MS4 Individual Permit | Active | 2024-11-20 | 2024-12-01 | 2029-11-30 |
| Caln Township | No | PAG-13 MS4 General Permit | Active | 2019-01-15 | 2019-01-15 | 0000-00-00 |
| City of Coatesville | Yes | MS4 Individual Permit | Active | 2019-11-25 | 2019-12-01 | 2024-11-30 |
| Downingtown Borough | Yes | PAG-13 MS4 General Permit | Active | 2024-02-16 | 2024-02-16 | 2025-03-15 |
| East Bradford Township | Yes | MS4 Individual Permit | Active | 2020-08-11 | 2020-09-01 | 2025-08-31 |
| East Brandywine Township | Yes | MS4 Individual Permit | Active | 2019-08-06 | 2019-09-01 | 2024-08-31 |
| East Caln Township | Yes | MS4 Individual Permit | Active | 2021-09-14 | 2021-10-01 | 2026-09-30 |
| East Fallowfield Township | Yes | MS4 Individual Permit | Active | 2022-10-07 | 2022-11-01 | 2027-10-31 |
| East Marlborough Township | Yes | PAG-13 MS4 General Permit | Active | 2004-02-18 | 2004-03-01 | 2008-03-09 |
| East Whiteland Township | Yes | MS4 Individual Permit | Active | 2020-05-26 | 2020-07-01 | 2025-06-30 |
| Franklin Township | Yes | MS4 Individual Permit | Active | 2025-01-03 | 2025-02-01 | 2030-01-31 |
| Honey Brook Borough | Yes | Unknown | Unknown | 0000-00-00 | 0000-00-00 | 0000-00-00 |
| Honey Brook Township | Yes | MS4 Individual Permit | Active | 2004-02-18 | 2004-03-01 | 2008-03-09 |
| Kennett Square Borough | Yes | MS4 Individual Permit | Active | 2020-03-16 | 2020-04-01 | 2025-03-31 |
| Kennett Township | Yes | MS4 Individual Permit | Active | 2024-08-14 | 2024-09-01 | 2029-08-31 |
| London Britain Township | Yes | MS4 Individual Permit | Active | 2024-12-09 | 2025-01-01 | 2029-12-31 |
| London Grove Township | Yes | MS4 Individual Permit | Active | 2024-12-03 | 2025-01-01 | 2029-12-31 |
| Londonderry Township | Yes | MS4 Individual Permit | Active | 2024-04-09 | 2024-05-01 | 2029-04-30 |
| Modena Borough | Yes | MS4 Individual Permit | Inactive | 2020-12-17 | 2021-02-01 | 2026-01-31 |
| New Garden Township | Yes | MS4 Individual Permit | Active | 2021-12-16 | 2022-01-01 | 2026-12-31 |
| New London Township | Yes | MS4 Individual Permit | Active | 2024-12-05 | 2025-01-01 | 2029-12-31 |
| Newlin Township | No | MS4 Waiver - Individual | Active | 2024-02-05 | 0000-00-00 | 0000-00-00 |
| Parkesburg Borough | Yes | MS4 Individual Permit | Active | 2020-05-26 | 2020-07-01 | 2025-06-30 |
| Penn Township | Yes | MS4 Individual Permit | Active | 2023-05-01 | 2023-05-01 | 2028-04-30 |
| Pennsbury Township | No | PAG-13 MS4 General Permit | Active | 2024-03-11 | 2024-03-11 | 2029-03-10 |
| Pocopson Township | Yes | MS4 Individual Permit | Active | 2024-05-29 | 2024-06-01 | 2029-05-31 |
| Sadsbury Township | Yes | MS4 Individual Permit | Active | 2022-12-01 | 2022-12-01 | 2027-11-30 |
| South Coatesville Borough | Yes | PAG-13 MS4 General Permit | Active | 2018-07-11 | 2018-07-11 | 0000-00-00 |
| Thornbury Township | Yes | MS4 Individual Permit | Active | 2024-12-04 | 2025-01-01 | 2029-12-31 |
| Upper Uwchlan Township | Yes | MS4 Individual Permit | Active | 2024-06-27 | 2024-07-01 | 2029-06-30 |
| Uwchlan Township | Yes | MS4 Individual Permit | Active | 2021-07-12 | 2021-08-01 | 2025-07-31 |
| Valley Township | Yes | MS4 Individual Permit | Active | 2020-06-10 | 2020-07-01 | 2025-06-30 |
| Wallace Township | Yes | MS4 Individual Permit | Active | 2024-09-27 | 2024-10-01 | 2029-09-30 |
| West Bradford Township | Yes | MS4 Individual Permit | Active | 2004-02-19 | 2004-03-01 | 2008-03-09 |
| West Brandywine Township | Yes | MS4 Individual Permit | Active | 2024-01-12 | 2024-02-01 | 2029-01-31 |
| West Caln Township | Yes | MS4 Individual Permit | Active | 2025-01-29 | 2025-02-01 | 2030-01-31 |
| West Chester Borough | Yes | MS4 Individual Permit | Active | 2024-05-29 | 2024-06-01 | 2029-05-31 |
| West Goshen Township | Yes | MS4 Individual Permit | Active | 2024-08-14 | 2024-09-01 | 2029-08-31 |
| West Grove Borough | Yes | MS4 Individual Permit | Active | 2022-09-07 | 2022-10-01 | 2027-09-30 |
| West Pikeland Township | Yes | MS4 Individual Permit | Active | 2019-08-30 | 2019-09-01 | 2024-08-31 |
| West Vincent Township | No | MS4 Waiver - Individual | Active | 2024-04-01 | 2024-04-01 | 2029-03-31 |
| West Whiteland Township | Yes | MS4 Individual Permit | Active | 2022-06-15 | 2022-07-01 | 2027-06-30 |
| Westtown Township | Yes | MS4 Individual Permit | Active | 2019-11-20 | 2019-12-01 | 2024-11-30 |