Connecticut

Who may prepare a stormwater plan in Connecticut

Connecticut requires a credentialed preparer. A plan generated here is a draft for that person to review, adopt and sign.

The answer

Credential required

Connecticut requires a credentialed preparer. A plan generated here is a draft for that person to review, adopt and sign.

Credentials that qualify

Connecticut-licensed PE
Connecticut-licensed landscape architect

An independent reviewer is also required, and at 20 acres or more that reviewer must be from a different firm.

Verified2026 Connecticut CGP sections 2.2.14 and 2.2.16Source

What this means for a generated plan

Where a credential applies, or where we cannot confirm that none does, treat a generated document as a complete draft for a credentialed preparer to review, amend and sign. It is not by itself a compliant filed plan, and ours says so on its face.

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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 Connecticut

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

Connecticut requires a credentialed preparer. A plan generated here is a draft for that person to review, adopt and sign.

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

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 Connecticut SWPPP requirements in Connecticut All jurisdictions

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