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Maine

The stormwater permit for construction in Maine

Maine 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

Not verified for Maine

We have not read the construction general permit that governs this jurisdiction, so we will not name one. Confirm which permit applies with Maine Department of Environmental Protection (Maine DEP), Bureau of Land Resources before you break ground.

Who may prepare the plan

A credentialed preparer is required

Maine requires a credentialed preparer. Treat the generated document as a complete draft for that person to review, adopt and sign. It is not by itself a compliant filed plan.

Qualifying routes

  • Maine DEP certification in erosion control practices (or an equivalent certification accepted by the Department)

Effective January 14, 2025. No state-wide permit number appears in the permit or its appendices. Credential: the permit states the SWPPP 'must be prepared by a professional who has a valid Department certification in erosion control practices, or an equivalent certification accepted by the Department.' Generated SWPPPs are drafts for a certified preparer to review, amend and sign. A separately certified Resident Inspector is also required. The preparer requirement was found during the jurisdiction registry pass but the exact permit clause was not captured, so this is marked unverified. We still apply the gate, because under-claiming a credential requirement is the safe direction of error.

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

Does a site in Maine 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

Not verified

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

  • We could not verify which permit governs a construction site in Maine. Confirm with the state permitting authority before you break ground.
  • Maine requires a credentialed preparer. Treat the generated document as a complete draft for that person to review, adopt and sign. It is not by itself a compliant filed plan.
  • 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. 1

    Coverage threshold

    The project disturbs 1 acres, at or above the 1 acre threshold, so it needs permit coverage.

    VerifiedPart 1.1.2Source
  2. 2

    Permitting authority

    Maine runs its own NPDES programme, and we have not verified its construction general permit. We will not guess its requirements.

  3. 3

    Preparer credential

    Maine requires a credentialed preparer. Treat the generated document as a complete draft for that person to review, adopt and sign. It is not by itself a compliant filed plan.

What to do next

  1. 1. Confirm the governing permit. We have not verified this. Contact Maine Department of Environmental Protection (Maine DEP), Bureau of Land Resources and ask which construction general permit covers your site. Maine Department of Environmental Protection (Maine DEP), Bureau of Land Resources
  2. 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 Maine
  3. 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. 4. Read the requirements in full. SWPPP requirements in Maine

Screen a Maine site now

Runs in your browser. Nothing about the site is transmitted.

Screen your site

Runs in your browser

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

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.

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)

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

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 the Maine construction stormwater permit

Do I need a stormwater permit for a construction site in Maine?

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 Maine?

We have not verified which permit governs construction stormwater in Maine. Confirm with Maine Department of Environmental Protection (Maine DEP), Bureau of Land Resources before you break ground. We will not name a permit we have not read.

Does Maine require a qualified preparer for the plan?

Maine requires a credentialed preparer. Treat the generated document as a complete draft for that person to review, adopt and sign. It is not by itself a compliant filed plan.

Keep the record Maine will ask you for

The screening is free. Holding the written plan and the retained inspection log is what the permit actually demands.

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