Compare Regulations
Compare state-level permit requirements side-by-side (up to 4 states)
MD(3 more)
Rows with an amber indicator differ across selected states.
| Field | MD Maryland |
|---|---|
| NPDES Program | State-Delegated |
| Permitting Agency | Maryland Department of the Environment (MDE) |
| Permit Name | NPDES General Permit for Stormwater Associated with Construction Activity (Permit No. 12-SW) |
| Construction Threshold | ≥ 1 acre of land disturbance (or < 1 acre if part of a larger common plan of development or sale); sites disturbing < 5,000 sq ft in certain Priority Protection Areas may also require coverage |
| NOI Lead Time | NOI must be submitted and MDE must issue permit coverage before land disturbance begins; MDE typically processes NOIs within 7–14 days, but applicants should plan for up to 30 days; no grading may begin until written authorization is received |
| Application Method | Online submission through MDE's Electronic Document Management System (EDMS) / MDE Online Permitting portal; paper NOI also accepted; local Approving Authority (county or municipality) approval of grading and sediment control plan is a prerequisite |
| Permit Fee | $1,600 base fee for sites disturbing ≥ 1 acre but < 5 acres; $2,900 for 5–9.99 acres; $5,100 for 10–19.99 acres; $7,000 for 20–49.99 acres; $9,600 for ≥ 50 acres; fees are paid to MDE at time of NOI submission |
| SWPPP Required | Yes |
| PE Certification Required | No |
| SWPPP Template Available | Yes |
| Inspection Frequency | Every 7 days and within 24 hours after any storm event producing ≥ 0.5 inches of rainfall; stabilized areas may be inspected every 14 days; local erosion and sediment control inspectors from the county or municipality also conduct compliance inspections throughout the project |
| Inspector Qualification | Maryland requires that SWPPP inspections be conducted by a person with Erosion and Sediment Control certification; Maryland's state certification program is the Erosion and Sediment Control Inspector certification administered by MDE in coordination with local jurisdictions; all inspectors on covered sites are required to be trained |
| Post-Construction Required | Yes |
| Turbidity Standard | No numeric NTU effluent limit in the construction general permit; narrative standard requires discharges to meet Maryland's water quality standards; discharges must not cause or contribute to a violation of the antidegradation policy |