State permit changes delayed; new MS4 rules may increase inspections and reporting

Aug 4, 2026

Consultant Sam Mosley said state DEP revised the MS4 draft permit after public comment and has not set a final rollout date; Westtown should expect more frequent outfall screenings and a new volume management plan that will affect inspection workloads and ordinance language.

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At the Westtown supervisors workshop, Cedarville consultant Sam Mosley said the state Department of Environmental Protection received extensive public comment on a proposed update to the MS4 permit and delayed the rulemaking. "They received quite a bit of pushback, and they keep revising it," Mosley said, adding that the state has not published a new implementation date and that the earliest realistic start is likely 2027.

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