Pennsylvania Storm Water Management Act (Act 167) — County Watershed-Based Plans (PA)
Tracked preemption from the Pennsylvania overlay bundle.
Overview
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Effective
1978-10-04
Sunset
—
Authority
state
Scope
state:PA
Other Pennsylvania preemptions
Pennsylvania Act 13 — Oil & Gas Operational Preemption (58 Pa.C.S. §3303)Chesapeake Bay Watershed — Riparian Buffer & E&S Control (25 Pa. Code Ch. 102)Pennsylvania Natural Diversity Inventory (PNDI) Environmental ReviewMPC §503(1.1) — Manufactured / Industrialized Housing PreemptionPennsylvania Uniform Construction Code (UCC) — Building Code PreemptionFirearms — Local Regulation Preemption (18 Pa.C.S. §6120)Pennsylvania History Code — State Historic Preservation Review (Pa.C.S. Title 37)Pennsylvania Agricultural Area Security Law — Agricultural Security Areas (Act 43 / Act 38 of 2005)
Trigger predicate
When this evaluates true for a parcel, the law's preempted fields take precedence over base zoning.
always true
Preempted fields
2 fields on the base district schema are rewritten when the trigger fires.
| Field | Op | Value | Note |
|---|---|---|---|
review_type | require | act_167_watershed_stormwater_plan_consistency | Counties prepare watershed-based stormwater management plans; municipalities within the watershed must adopt local ordinances implementing the plan within 6 months of plan approval by DEP. Municipal stormwater ordinances must control post-construction runoff volume, rate, and water quality consistent with the watershed plan. |
review_type | require | npdes_phase_ii_ms4_permit_compliance | Designated MS4 municipalities must obtain NPDES Phase II permits from PA DEP under 25 Pa. Code Ch. 92a, requiring Stormwater Management Programs (SWMPs) with six minimum control measures. Local zoning/subdivision review must enforce the SWMP's post-construction BMPs. |
Citation
Authority source
Pennsylvania Storm Water Management Act, Act of Oct. 4, 1978, P.L. 864, No. 167, 32 P.S. §§680.1–680.17
§ 32 P.S. §§680.5 (county plan), 680.11 (municipal ordinance adoption)
Research notes
Federal conflict check enabled because NPDES MS4 program operates under federal Clean Water Act §402(p) authority delegated to PA. Implementing regulations at 25 Pa. Code Ch. 102 (Erosion & Sediment Control) and Ch. 92a (NPDES).