Missouri
The stormwater permit for construction in Missouri
Missouri 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
Construction or Land Disturbance Master General Stormwater Permit, Permit Number MORA00000
- Issued by
- Missouri Department of Natural Resources (MoDNR), Water Protection Program, Division of Environmental Quality
- Permit number
- MORA00000
- Version determined against
- as published by the state agency
- Expires
- 2027-02-07
Who may prepare the plan
No preparer credential foundNo preparer credential was found for Missouri. 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.
Missouri does not gate SWPPP preparation behind any specific certification, license, or professional credential — confirmed as an explicit absence in both the implementing regulation and MoDNR's public program materials. No PE stamp is required by the state permit program for the SWPPP itself (a City of Mexico, MO municipal grading/drainage plan review requires a licensed PE seal, but that is a local requirement layered on top, not a MORA00000 state-permit requirement). Preparers commonly hold voluntary industry credentials such as CPESC as best practice, but none is legally mandated. This conclusion rests on the regulation text and program pages, not a direct read of the full MORA00000 permit document, which is administered entirely through MoDNR's online ePermitting system and was inaccessible (HTTP 403) at every access attempt.
Does a site in Missouri 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 Construction or Land Disturbance Master General Stormwater Permit, Permit Number MORA00000, 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.
- The permit number MO-R100007 originally supplied as known context does not correspond to the general permit private construction sites actually use -- MO-R100xxx ('Area-Wide Land Disturbance Stormwater General Permit') is issued only to governmental jurisdictions. The general permit individual private developers/contractors use is MO-RA00000 ('Land Disturbance Stormwater General Operating Permit'), confirmed via DNR's own program page. This dataset covers MO-RA00000. DNR's static document server still serves the PRIOR permit cycle text (HTTP-verified last-modified 2017-02-06, effective 2017-02-08, expired 2022-02-07) -- it was never updated after the 2022 renewal. DNR's overview page confirms 'The current permit expires Feb. 7, 2027' (a newer cycle exists) but its full operative text could not be located/fetched (DNR's water pages return HTTP 403 to automated fetches). All substantive figures below are verified against the 2017-2022 text -- the most recent full permit text obtainable -- not an independently confirmed 2022-2027 copy. The current cycle's effective date is not verified with a direct quote and is set to null. No federal-style acreage-tiered stabilization schedule, sensitive-waters increased-inspection rule, arid/semi-arid reduced-inspection rule, or fixed-day NOI/NOT deadline was found in the fetched text, so those canonical ids are omitted.
- No preparer credential was found for Missouri. 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
Missouri. The state runs its own programme under MORA00000.
- 3
Preparer credential
No preparer credential was found for Missouri. 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.
Verified10 CSR 20-6.200 (Missouri stormwater regulations); MoDNR Construction/Land Disturbance Permits program page (MORA00000)Source
What to do next
- 1. Confirm the governing permit. Read Construction or Land Disturbance Master General Stormwater Permit, Permit Number MORA00000 directly. It is linked above, and it is the document an inspector will hold you to. Missouri Department of Natural Resources (MoDNR), Water Protection Program, Division of Environmental Quality
- 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 Missouri
- 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 Missouri
Screen a Missouri site now
Runs in your browser. Nothing about the site is transmitted.
What people ask about the Missouri construction stormwater permit
Do I need a stormwater permit for a construction site in Missouri?
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 Missouri?
Missouri Department of Natural Resources (MoDNR), Water Protection Program, Division of Environmental Quality issues Construction or Land Disturbance Master General Stormwater Permit, Permit Number MORA00000.
Does Missouri require a qualified preparer for the plan?
No preparer credential was found for Missouri. 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 Missouri will ask you for
The screening is free. Holding the written plan and the retained inspection log is what the permit actually demands.