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State permit
ILR10: Illinois construction stormwater permit
ILR10 is the general permit Illinois EPA, Bureau of Water issues for stormwater from construction sites in Illinois. Effective / expires: 2023-09-22 / 2028-08-31. This page lists the rules a plan has to meet, each cited to the permit text or the agency page, checked October 20, 2026.
Sources last checked October 19, 2026. Prepared by our team led by Mohamed Elansary, PhD, with AI research tools. We are not a licensed engineering firm and do not seal plans.
General information; your permit text controls. Not legal advice and not engineering judgment. We make no promise of permit coverage, agency acceptance or compliance.
ILR10 at a glance
| Item | Rule | Source |
|---|---|---|
| Permit | General NPDES Permit for Storm Water Discharges from Construction Site Activities (ILR10) | Source |
| Agency | Illinois EPA, Bureau of Water | Permit text, permit cover |
| Effective / expires | 2023-09-22 / 2028-08-31 | Permit text, permit cover |
| Refile | 2028-08-31: On reissuance, existing permittees file new NOI + updated SWPPP within 180 days (2023 renewal precedent) | Construction Site Activities General Permit section; change item 4 (Part II.A.2) |
| How to file (NOI) | NOI and an electronic copy of the SWPPP filed in EPA CDX (Part II.C.9, II.D); fee mailed to IEPA with the permit ID | Permit text, Cover (dates), Part II.C.9 and II.D (NOI + SWPPP via CDX, fee), Part IV.D.4 (inspections, qualified personnel). Read by OCR of IEPA's scanned permit PDF |
| Fee | Applicable fee per Part II.D (amount not listed in the permit); renewal NOI no fee | Permit text, Cover (dates), Part II.C.9 and II.D (NOI + SWPPP via CDX, fee), Part IV.D.4 (inspections, qualified personnel). Read by OCR of IEPA's scanned permit PDF |
| Who may write the plan | No license or seal; plan signed by a responsible official (Part IV) | Permit text, Cover (dates), Part II.C.9 and II.D (NOI + SWPPP via CDX, fee), Part IV.D.4 (inspections, qualified personnel). Read by OCR of IEPA's scanned permit PDF |
| Inspector | Qualified personnel: PE, CPESC, CESSWI, CSI, EPA CGP inspector-course graduate, or other knowledgeable person (Part IV.D.4) | Permit text, Cover (dates), Part II.C.9 and II.D (NOI + SWPPP via CDX, fee), Part IV.D.4 (inspections, qualified personnel). Read by OCR of IEPA's scanned permit PDF |
| Inspection frequency | Every 7 calendar days and within 24 h after 0.5 in rain; monthly when frozen (Part IV.D.4) | Permit text, Cover (dates), Part II.C.9 and II.D (NOI + SWPPP via CDX, fee), Part IV.D.4 (inspections, qualified personnel). Read by OCR of IEPA's scanned permit PDF |
| What we cover | Sites where no county or municipal stormwater ordinance requires a sealed plan. Some local ordinances (for example Cook County MWRD) may; we screen for this before you order. | Illinois hub and coverage by state |
What we do
We prepare the plan document. We do not stamp plans, visit sites or file the NOI; you file it. The site check at checkout applies the Illinois limits shown on the Illinois hub before payment.