Mississippi
The stormwater permit for construction in Mississippi
Mississippi 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
Large Construction General Permit for Land Disturbing Activities of Five (5) or More Acres (MSR10)
- Issued by
- Mississippi Department of Environmental Quality (MDEQ)
- Permit number
- MSR10
- Version determined against
- as published by the state agency
- Effective
- 2022-02-04
- Expires
- 2027-01-31
Who may prepare the plan
No preparer credential foundNo preparer credential was found for Mississippi. 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 Mississippi 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 Large Construction General Permit for Land Disturbing Activities of Five (5) or More Acres (MSR10), 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.
- This overlay covers only the MSR10 Large Construction General Permit (5+ acres). Mississippi also issues a separate Small Construction General Permit (1 to <5 acres), administratively continued past its April 30, 2024 expiration; its text was not fetched/verified in this session and is not represented here. Not found in the fetched MSR10 text: a fixed day-count NOI lead time before starting construction; a distinct inspection-report-filing deadline; an increased-inspection-frequency trigger for sensitive/impaired waters; a reduced-inspection-frequency provision for arid/drought conditions (MS's only drought-related provision affects stabilization method, not inspection frequency). MS does not use an acreage-tiered final-stabilization completion deadline; final stabilization is defined by a 70% vegetative cover density threshold instead.
- No preparer credential was found for Mississippi. 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
Mississippi. The state runs its own programme under MSR10.
- 3
Preparer credential
No preparer credential was found for Mississippi. 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 Large Construction General Permit for Land Disturbing Activities of Five (5) or More Acres (MSR10) directly. It is linked above, and it is the document an inspector will hold you to. Mississippi Department of Environmental Quality (MDEQ)
- 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 Mississippi
- 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 Mississippi
Screen a Mississippi site now
Runs in your browser. Nothing about the site is transmitted.
What people ask about the Mississippi construction stormwater permit
Do I need a stormwater permit for a construction site in Mississippi?
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 Mississippi?
Mississippi Department of Environmental Quality (MDEQ) issues Large Construction General Permit for Land Disturbing Activities of Five (5) or More Acres (MSR10).
Does Mississippi require a qualified preparer for the plan?
No preparer credential was found for Mississippi. 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 Mississippi will ask you for
The screening is free. Holding the written plan and the retained inspection log is what the permit actually demands.