Oklahoma Aerobic Guide is a directory of Department of Environmental Quality certified-installer rows with an aerobic spray flag. It does not maintain systems, and it does not publish a visit price. How we check the list explains the roster method.
The City of Edmond says: “Although Edmond's award-winning Coffee Creek Water Resources Recovery Facility serves the majority of Edmond's residents, many others depend on onsite wastewater treatment systems (OWTS).”
Use this page only for an aerobic system inside Edmond city limits. A mailing address that says Edmond does not prove those limits. A postal city and a city-limits line are different maps. Ask the City before you treat the yearly verification as yours.
What the City of Edmond requires
The City’s Aerobic Treatment Maintenance page says:
“The City of Edmond requires all builders of new residential properties with aerobic systems to provide a 2-year maintenance agreement in accordance with City Ordinance No. 3477, specifically 21.03.091 Section 3. After 2 years, the homeowner will be responsible for providing yearly verification of continued professional inspections and maintenance to the City of Edmond.”
The same page says that at the end of the 2-year contract, the maintenance responsibility falls to the homeowner unless the contract is renewed. This page quotes that sentence. It does not describe how the yearly verification is filed. Ask Edmond Stormwater Quality.
- Office
- Stormwater Quality, 22 E. Main Street, Edmond, OK 73034
- Phone
- (405) 359-4770
- Hours
- Monday–Thursday 7:30 a.m.–5:30 p.m. Friday 7:30 a.m.–11:30 a.m.
The City’s aerobic brochure repeats the state forms and the 2-year agreement. Its local-requirements sentence, read October 21, 2026, does not include the words “with aerobic systems” that the web page uses. Quote the web page. The brochure lists a drainage utility line, 405.359.4772. That is a different number from Stormwater Quality.
This page does not quote the Edmond municipal code. The ordinance text on Municode was not the source used here. The City web page is.
What the state requires first
The City page describes the state step that comes before the local yearly verification. For an aerobic system to be installed in Oklahoma, an installer submits three forms to the Oklahoma Department of Environmental Quality: Forms 641-581SP, 641-581Cert, and 641-575.
The same page says ODEQ requires all aerobic system installers to provide a 2-year service and maintenance agreement with at least 4 inspection/service visits (ODEQ Title 252.641.10). Between those visits, the City page says ODEQ recommends that homeowners check the chlorine level and add chlorine as necessary.
The DEQ fact sheet “Residential Aerobic Treatment Systems” (March 2025) says the maintenance for those first two years is included in the installation cost. If the installer does not provide it, call DEQ at 1-800-522-0206. After the two years, the fact sheet says the owner performs the required maintenance or contracts with a maintenance provider. The rule it quotes, OAC 252:641-10-3(C), says the owner is solely responsible for maintaining the system or hiring someone to maintain it so that it operates as designed.
The statewide contract page is aerobic septic maintenance contracts. The roster list for that job across the state is aerobic septic maintenance across Oklahoma. This page does not copy them. It stays on the Edmond yearly verification and the record a provider should be willing to write down.
What a yearly maintenance record should show
These are the items DEQ makes installers record in the first two years. Ask your provider to put the same items in writing. They are not a City of Edmond rule, and they are not a description of how Edmond files the yearly verification.
OAC 252:641-10-3, as quoted in the DEQ fact sheet, says the installer does the following at least once every six months during those two years:
- Chlorine
- When spray dispersal is used, test and record the free chlorine residual of the effluent in the pump tank.
- Trash tank
- Measure and record the depth of the sludge in the trash tank.
- ATU
- Measure and record the volume of the sludge in forced-air aerobic treatment units.
- Clarity
- When a pump tank is used, record a clarity test as passing or failing. A passing test means an eight-inch disk with alternating black and white quadrants is visible on the bottom of the pump tank when the tank is at least one-third full.
The same rule says the installer notifies the owner in writing of the type and date of repairs, adjustments, or replacements; the chlorine result and, when it applies, the need to add chlorine and how to do it; the trash-tank sludge depth and the need to pump so that depth is never more than 40 percent of the overall depth; the aerobic treatment unit sludge volume and the need to pump so that volume is never more than 40 percent; and the clarity result, including what was done or what the homeowner needs to do if the test fails.
The trash-tank limit is a depth. The treatment-unit limit is a volume. Both figures are 40 percent. They are not the same measurement. The fact sheet’s quote of the rule also says the installer keeps the maintenance and testing records at the business for three years after the service date, and is not responsible when the owner or operator is the sole cause of the damage or malfunction.
Homeowner checklist from the City
The City’s homeowner list, on the Aerobic Treatment Maintenance page, is one sentence. Correct operation and maintenance includes: “checking chlorine residual monthly, contacting a septic specialist immediately if alarm activates, practicing water conservation techniques, maintaining inspection records, monitoring sludge build-up in the chambers, maintaining landscaping near irrigation system, inspecting sprinkler heads for clogs, and using septic-safe detergents and toilet paper.”
- Check the chlorine residual monthly.
- Contact a septic specialist immediately if the alarm activates.
- Practice water conservation.
- Keep inspection records.
- Watch sludge build-up in the chambers.
- Keep landscaping clear of the spray area.
- Check sprinkler heads for clogs.
- Use septic-safe detergents and toilet paper.
The City’s “immediately” is the City’s word for the alarm. This directory does not add a response time. The City page also lists these disadvantages: more inspection and monitoring than other systems; spray irrigation can drift downwind and encroach on other properties; long power outages are a problem because the system needs electricity.
If the alarm sounds, start with the City’s instruction to contact a specialist, then use this site’s separate note on an alarm going off. The page on what DEQ counts as a repair is a different rule. It is not the Edmond yearly verification.
Companies with an Edmond mailing address
A recount of this directory’s home page and companies hub on October 21, 2026 found 136 certified-installer cards. Central Oklahoma mailing cities account for 36 of them. The Edmond mailing city is 2 cards. Both are named Red Dirt Septic: 405-348-3478 and 405-381-3478. The company fact cards were last checked 2026-10-06. This recount did not open a new Department of Environmental Quality roster download.
The repair tag and the maintenance tag are on all 136 cards. They are site defaults. They do not show that either Red Dirt Septic record offers a maintenance contract, and they do not show that either record files Edmond’s yearly verification. Ask whether they offer maintenance contracts, and whether they cover your address. The city list is aerobic septic companies in Edmond.
Quick answers
Does an Edmond mailing address mean the City yearly verification applies?
No. The City says Coffee Creek Water Resources Recovery Facility serves the majority of Edmond residents, and many other homes depend on onsite systems. The yearly verification is for an aerobic system inside Edmond city limits. A mailing address that says Edmond does not prove those limits. Ask Stormwater Quality at 22 E. Main Street, Edmond, OK 73034, (405) 359-4770. This page does not describe how the verification is filed.
What should a yearly maintenance record show?
The City page requires yearly verification of continued professional inspections and maintenance. It does not list the line items, and this page does not describe the filing. During the first two years, OAC 252:641-10-3, as quoted in the DEQ fact sheet, has the installer test and record free chlorine residual on a spray system, trash-tank sludge depth, aerobic treatment unit sludge volume, and a pump-tank clarity test, and notify the owner in writing of repairs and when to pump so sludge stays within that rule's 40 percent limits. Ask your provider to put those same items in writing. That request is not a City rule.
Do the Edmond roster records mean a company offers a maintenance contract?
No. A recount of this directory's home page and companies hub on October 21, 2026 found 136 certified-installer cards, 36 with a Central Oklahoma mailing city, and 2 with an Edmond mailing city. Both Edmond cards are named Red Dirt Septic, at 405-348-3478 and 405-381-3478. The maintenance tag is on all 136 cards, so it is a site default. Ask whether they offer maintenance contracts.
Sources
- City of Edmond, Aerobic Treatment Maintenance, read October 21, 2026. Ordinance No. 3477 (21.03.091 Section 3) quote; forms 641-581SP, 641-581Cert, and 641-575; 2-year agreement with at least 4 visits; chlorine check between visits; homeowner duty list; spray drift, inspection, and power-outage cautions; Stormwater Quality, 22 E. Main Street, Edmond, OK 73034, (405) 359-4770, Monday–Thursday 7:30 a.m.–5:30 p.m., Friday 7:30 a.m.–11:30 a.m.
- City of Edmond, Aerobic & Septic System Maintenance, read October 21, 2026. Coffee Creek Water Resources Recovery Facility serves the majority of residents; many homes depend on onsite systems.
- City of Edmond aerobic brochure (Document Center 4356), read October 21, 2026. Drainage utility line 405.359.4772. The brochure’s local-requirements sentence omits “with aerobic systems,” which the web page includes.
- DEQ fact sheet, Residential Aerobic Treatment Systems (March 2025), read October 21, 2026. First two years of maintenance included in the installation cost; call 1-800-522-0206 if the installer does not provide it; OAC 252:641-10-3 record items, clarity test, 40 percent pump limits, and the owner’s duty after two years.
- This directory’s home page and companies hub, recounted October 21, 2026: 136 cards, 36 Central Oklahoma mailing cities, 2 Edmond mailing cities, maintenance tag on every card. Phones and last-checked dates are the ones printed on Red Dirt Septic, 405-348-3478 and Red Dirt Septic, 405-381-3478.