Compare Regulations
Compare state-level permit requirements side-by-side (up to 4 states)
IL(3 more)
Rows with an amber indicator differ across selected states.
| Field | IL Illinois |
|---|---|
| NPDES Program | State-Delegated |
| Permitting Agency | Illinois Environmental Protection Agency (IEPA) |
| Permit Name | NPDES General Permit for Stormwater Discharges from Construction Site Activities (Permit No. ILR10) |
| Construction Threshold | ≥ 1 acre of land disturbance (or < 1 acre if part of a larger common plan of development or sale); Chicago Metropolitan Agency for Planning (CMAP) area may have additional requirements through local MS4 permits |
| NOI Lead Time | NOI must be submitted to IEPA and permit coverage must be obtained before construction begins; IEPA typically processes NOIs within 30 days; applicants should plan accordingly and submit at least 30 days in advance |
| Application Method | Online via Illinois EPA's online NOI submission system (MyIEPA / IEPA online permitting); paper NOI also accepted; permit number ILR10 general permit coverage |
| Permit Fee | $700 NOI permit fee for sites disturbing < 5 acres; $1,000 for sites disturbing ≥ 5 acres; fees paid at time of NOI submission |
| SWPPP Required | Yes |
| PE Certification Required | No |
| SWPPP Template Available | Yes |
| Inspection Frequency | At least every 7 calendar days and within 24 hours after a storm event producing ≥ 0.5 inches of rainfall over a 24-hour period; inspections must be documented on forms that are retained on-site and available to IEPA |
| Inspector Qualification | Inspections must be performed by a 'Qualified Inspector' — defined as an individual who has completed an approved stormwater inspector training program; Illinois does not have a mandatory state-specific certification but recommends CISEC (Certified Inspector of Sediment and Erosion Control) or CPESC; some MS4 jurisdictions in the Chicago area require certified inspectors |
| Post-Construction Required | Yes |
| Turbidity Standard | No numeric NTU turbidity limit in the general permit ILR10; narrative standard applies — discharges must not cause or contribute to violations of Illinois water quality standards |