Illinois

Who may prepare a stormwater plan in Illinois

We found no state level preparer credential for Illinois. On what we verified, an operator may adopt the plan without a credentialed signature. Local ordinances can still be stricter.

The answer

None found

We found no state level preparer credential for Illinois. On what we verified, an operator may adopt the plan without a credentialed signature. Local ordinances can still be stricter.

State law is a floor: Cook County MWRD ordinance section 303.2.A(3) effectively requires a PE seal within Illinois.

No permit section cited. Confirm this with your permitting authority.

What this means for a generated plan

On what we verified, an operator may adopt a generated plan here without a credentialed signature. Local ordinances can still impose a stricter gate than state law, so check the county or municipality as well.

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State*

Activity*

Total acres disturbed*

Total land disturbance over the whole project, including staging and access. This decides whether you need a permit at all.

Acres open at any one time

Optional. If you phase the work, the most that will be disturbed at once. Leave blank if the whole site is open together. The stabilisation deadline turns on this figure, not the total.

Part of a larger common plan of development or sale

A half acre lot inside a 40 acre subdivision is covered even though the lot alone is under the threshold. This is the most commonly missed trigger in the permit.

Receiving water and site conditions(optional, but they change the inspection frequency)

Discharges to a sediment or nutrient impaired water

Discharges to a Tier 2, 2.5 or 3 water

Arid, semi arid or drought stricken area

May allow a reduced inspection frequency during the seasonally dry period.

In Indian country

EPA keeps permitting authority in Indian country even inside a state that runs its own programme.

No account, no card, nothing transmitted.

What people ask about preparing a SWPPP in Illinois

Do I need a qualified preparer for a SWPPP in Illinois?

We found no state level preparer credential for Illinois. On what we verified, an operator may adopt the plan without a credentialed signature. Local ordinances can still be stricter.

Does a professional engineer have to stamp the plan in Illinois?

Practice act citations are routinely overstated on this point. A PE stamp is not required as a general matter in most states with no preparer gate, and where we have not verified it we will not assert either answer. Confirm with the state board or the permitting authority.

Which permit governs Illinois SWPPP requirements in Illinois All jurisdictions

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