Wisconsin
The stormwater permit for construction in Wisconsin
Wisconsin runs its own NPDES programme, so a state issued construction general permit governs. Below is what our engine can say about it, and where we have not read that permit, what it will not say.
Governing permit
WPDES General Permit No. WI-S067831-6, Storm Water Associated with Land Disturbing Construction Activity
- Issued by
- Wisconsin Department of Natural Resources (WDNR)
- Permit number
- WI-S067831-6
- Version determined against
- as published by the state agency
- Effective
- 2021-10-01
- Expires
- 2026-09-30
Who may prepare the plan
No preparer credential foundNo preparer credential was found for Wisconsin. On what we have verified, a generated plan can be adopted by the operator without a credentialed signature. Local ordinances can still be stricter than state law.
No preparer credential found in the reviewed sources. Not exhaustively verified; confirm with the state agency and any local ordinance.
No permit section cited. Confirm this with your permitting authority.
Does a site in Wisconsin need coverage
Worked for a one acre site as a reference point. Change the acreage in the tool below and the answer, and its reasoning, change with it.
Coverage
Permit coverage required
The project disturbs 1 acres, at or above the 1 acre threshold, so it needs permit coverage.
Determined against dataset version 2026-07-19.
Read these before you act on the answer
- Requirements below are what we have read and cited directly from WPDES General Permit No. WI-S067831-6, Storm Water Associated with Land Disturbing Construction Activity, not the federal CGP. A category we have not yet transcribed from this permit is omitted here rather than assumed to match EPA's rule.
- WI has no explicit 'qualified inspector' credential requirement, so inspection.qualifiedPerson is omitted. WI does not use a fixed-day-count or acreage-tiered stabilization deadline like federal Table 2; instead it uses narrative standards ('as soon as practicable'), so stabilization.complete.fiveAcresOrLess/moreThanFiveAcres are omitted. WI does not have a distinct tiered 'majorFix' corrective-action deadline separate from its 24-hour repair requirement, so corrective.deadline.majorFix is omitted. No fixed-hour deadline exists for documenting/reporting a deficiency beyond 'upon request', so inspection.report.deadline and corrective.documentation.identify are omitted. WI's numeric control standard (5 tons/acre/year soil loss) is a narrative/design performance standard incorporated by reference to NR 151.11/151.23, not a direct numeric effluent limit like turbidity/TSS mg/L, so it is reported as a benchmark rather than an effluent limit.
- No preparer credential was found for Wisconsin. On what we have verified, a generated plan can be adopted by the operator without a credentialed signature. Local ordinances can still be stricter than state law.
- Basinwise does not perform the physical site inspections the permit requires. Those must be carried out on site by a qualified person.
How this answer was reached, step by step
- 1
Coverage threshold
The project disturbs 1 acres, at or above the 1 acre threshold, so it needs permit coverage.
- 2
Permitting authority
Wisconsin. The state runs its own programme under WI-S067831-6.
- 3
Preparer credential
No preparer credential was found for Wisconsin. On what we have verified, a generated plan can be adopted by the operator without a credentialed signature. Local ordinances can still be stricter than state law.
What to do next
- 1. Confirm the governing permit. Read WPDES General Permit No. WI-S067831-6, Storm Water Associated with Land Disturbing Construction Activity directly. It is linked above, and it is the document an inspector will hold you to. Wisconsin Department of Natural Resources (WDNR)
- 2. Settle the preparer question before you draft. Getting this wrong costs a redraft at best. The detail is on the credential page for this state. Preparer credential in Wisconsin
- 3. Screen the site. Run the real acreage and receiving water facts through the tool below. You get the inspection frequency, the stabilisation deadlines and the filing path with the permit section behind each.
- 4. Read the requirements in full. SWPPP requirements in Wisconsin
Screen a Wisconsin site now
Runs in your browser. Nothing about the site is transmitted.
What people ask about the Wisconsin construction stormwater permit
Do I need a stormwater permit for a construction site in Wisconsin?
Permit coverage is triggered at one acre of land disturbance, and below one acre if the project is part of a larger common plan of development or sale that will ultimately disturb an acre or more. The project disturbs 1 acres, at or above the 1 acre threshold, so it needs permit coverage.
Who issues the construction stormwater permit in Wisconsin?
Wisconsin Department of Natural Resources (WDNR) issues WPDES General Permit No. WI-S067831-6, Storm Water Associated with Land Disturbing Construction Activity.
Does Wisconsin require a qualified preparer for the plan?
No preparer credential was found for Wisconsin. On what we have verified, a generated plan can be adopted by the operator without a credentialed signature. Local ordinances can still be stricter than state law.
Keep the record Wisconsin will ask you for
The screening is free. Holding the written plan and the retained inspection log is what the permit actually demands.