Oklahoma
The stormwater permit for construction in Oklahoma
Oklahoma 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
General Permit OKR10 for Stormwater Discharges from Construction Activities Within the State of Oklahoma
- Issued by
- Oklahoma Department of Environmental Quality (Oklahoma DEQ)
- Permit number
- OKR10
- Version determined against
- as published by the state agency
- Effective
- 2023-11-01
- Expires
- 2027-10-17
Who may prepare the plan
No preparer credential foundNo preparer credential was found for Oklahoma. 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.
The permit states it explicitly: use of a licensed PE for plan preparation is not required. OKR10 Part 5.1.B.
No permit section cited. Confirm this with your permitting authority.
Does a site in Oklahoma 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 General Permit OKR10 for Stormwater Discharges from Construction Activities Within the State of Oklahoma, 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.
- Oklahoma's actual OPDES construction stormwater general permit number is OKR10, not OKR100000 as initially assumed. The currently effective document is OKR10's second modification, effective November 1, 2023 (original issuance October 18, 2022). OK's coverage threshold matches the federal 1-acre floor. OK's stabilization COMPLETION deadline is tiered by 'High Priority Construction Site' status (40+ disturbed acres, or discharge within 1 mile of an impaired/ARC/ORW/TMDL water), not by a simple acreage split, so it was modeled as a new state.ok id. No arid/semi-arid/drought-based reduced inspection frequency was found; OK's only reduced-frequency rule is stabilization-status-based. Numeric effluent limits found apply only to asphalt batch plant construction-support activities, not general construction discharges.
- No preparer credential was found for Oklahoma. 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
Oklahoma. The state runs its own programme under OKR10.
- 3
Preparer credential
No preparer credential was found for Oklahoma. 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 General Permit OKR10 for Stormwater Discharges from Construction Activities Within the State of Oklahoma directly. It is linked above, and it is the document an inspector will hold you to. Oklahoma Department of Environmental Quality (Oklahoma DEQ)
- 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 Oklahoma
- 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 Oklahoma
Screen a Oklahoma site now
Runs in your browser. Nothing about the site is transmitted.
What people ask about the Oklahoma construction stormwater permit
Do I need a stormwater permit for a construction site in Oklahoma?
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 Oklahoma?
Oklahoma Department of Environmental Quality (Oklahoma DEQ) issues General Permit OKR10 for Stormwater Discharges from Construction Activities Within the State of Oklahoma.
Does Oklahoma require a qualified preparer for the plan?
No preparer credential was found for Oklahoma. 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 Oklahoma will ask you for
The screening is free. Holding the written plan and the retained inspection log is what the permit actually demands.