OKC metro septic installer cheat sheet
A free one-page reference for septic installers and soil profilers working the OKC metro. Prepared by JJ Prachyl, Sooner Services. Every figure links to its official source. Checked November 2, 2026. Print with your browser (Ctrl+P).
DEQ permit steps
- 581 Report to the local DEQ office, based on a soil profile (3+ holes or pits, DEQ or certified profiler), a percolation test (conventional only, Dept. of Health registrant, 24-hour presoak at 12 inches) or Design Only (Group 5, aerobic spray or lagoon only).
- Form 641-575 plus fee for the ATC, with Section, Township and Range.
- Install, then DEQ inspection before backfill, or certified self-inspection with Form 641-576 filed within 15 days.
- Aerobic: 2-year installer maintenance, checks every 6 months, records kept 3 years.
Sources: DEQ sewage treatment page, OAC 252:641, DEQ aerobic fact sheet. Non-certified installers: one system per calendar year since Nov. 1, 2025.
DEQ fees, 7/1/2026 to 6/30/2027
| Item | Fee |
|---|---|
| Soil test, DEQ augered / pits provided | $357.28 / $214.36 |
| ATC self-inspect, up to 1,500 gpd | $357.28 |
| ATC DEQ inspect, up to 1,500 gpd / over 1,500 | $500.19 / $643.08 |
| ATC in training, up to 1,500 gpd | $357.28 |
| Modify existing, self-inspect / DEQ inspect | $214.36 / $357.28 |
| Alternative plan review | $285.80 |
| Existing system evaluation / private well evaluation | $357.28 / $295.74 |
| Installer exam (per category) / annual certification | $214.36 / $285.80 |
| Late renewal / reinstatement | $65.62 / $71.45 |
Source: DEQ 252:641 fee schedule. Fees adjust each July 1 with CPI (OAC 252:641-23-4).
Key design numbers
- Design flow: 200 gpd for up to 2 bedrooms, plus 66 gpd per added bedroom (252:641-1-3).
- Spray: at least 2 heads, 15 degree max trajectory, timer 1:00 to 6:00 a.m. (252:641-12-7).
- Chlorine: 0.2 mg/l free residual in the pump tank (252:641-10).
DEQ contacts and lists
- DEQ main: 405-702-0100 (DEQ). On-site questions: (405) 702-6100 (DEQ). Complaints: 1-800-522-0206 (DEQ).
- Local DEQ Environmental Specialist list · Online payments and service requests
- Active certified installers · Certified soil profilers · Licensed septage pumpers
City contacts in the OKC metro
Cities may add building, plumbing or sewer-connection rules. Phone numbers appear only where we found them on the city's own page.
| City | Official page | Phone |
|---|---|---|
| Choctaw | Building Division forms | Use the number on the linked page |
| Harrah | Utility service policy | (405) 454-2951 (utility office) |
| Blanchard | Building permits | (405) 485-9392 (City Hall) |
| Midwest City | Permits and inspections | 405-739-1211 |
| Edmond | Aerobic treatment maintenance | Use the number on the linked page |
| Newcastle | Trade permit fee schedule | Use the number on the linked page |
| Piedmont | City website | Use the number on the linked page |
| Norman | City website | Use the number on the linked page |
| Moore | City website | Use the number on the linked page |
| Yukon | City website | Use the number on the linked page |
| Mustang | City website | Use the number on the linked page |
| Oklahoma City | City website | Use the number on the linked page |
Prepared by JJ Prachyl, Sooner Services, an independent referral service, not a contractor and not affiliated with DEQ. Free to print and share. Found something out of date? Tell us.
Related: permit steps and fees · inspection when buying · aerobic rules · signs of failure · all septic rules