Texas aerobic report compliance checker
Enter one maintenance visit and see whether the report meets Texas rules: the Table IV test results, the four-month test interval and the 14-day filing deadline. Every check shows the rule it comes from.
A checklist, not a pass or fail. This page has not seen your report; it lists what Figure 3 asks for so you can check it against the one you are about to send.
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Computed from: 30 TAC §285.91(4), Table IV; 30 TAC §285.7(e)(1)(B); 30 TAC §285.7(e)(3); 30 TAC §285.7(b)(3); 30 TAC §285.7(e)(1)(A); 30 TAC §285.90(3), Figure 3; 30 TAC §285.33(d)(2)(D); 30 TAC §285.33(d)(2)(G)(iv)
Data refreshed Oct 9, 2026.
Summarizes public rules/records as of Oct 9, 2026; not legal advice; verify with your permitting authority.
Table IV — what each system type is tested for
| SYSTEM | FREQUENCY | REQUIRED TESTS | TABLE XII |
|---|---|---|---|
| Any treatment method with surface application (spray) | At least once every four months | Total chlorine residual or fecal coliform at each required test; one BOD5 and TSS grab sample per year for non-single-family residences only | Test and Report |
| Secondary treatment with subsurface disposal (drip, drainfield, low pressure dosing, ET, leaching chamber, gravelless pipe, mound) | At least once every four months | None | Report |
| Non-standard system | Permit specific | Permit specific | Determined by the permitting authority |
The thresholds, in the rule’s own words
- Total chlorine residual (grab, pump tank): at least 0.1 mg/L . “0.1 mg/l Residual in Pump Tank” (30 TAC §285.91(4), Table IV)
- Fecal coliform (grab): not more than 200 MPN/100 mL (CFU/100 mL) . “Fecal Coliform Not To Exceed 200 MPN/100 ml (CFU/100 ml)” (30 TAC §285.91(4), Table IV)
- BOD5 (grab): not more than 65 mg/L — non-single-family residences only. “One BOD5 and TSS Grab Sample Per Year (non-single family residences only) ... BOD5 and TSS Grab Samples Not To Exceed 65 mg/l” (30 TAC §285.91(4), Table IV)
- TSS (grab): not more than 65 mg/L — non-single-family residences only. “One BOD5 and TSS Grab Sample Per Year (non-single family residences only) ... BOD5 and TSS Grab Samples Not To Exceed 65 mg/l” (30 TAC §285.91(4), Table IV)
The two disinfection tests are alternatives to each other — Table IV asks for one or the other at each required test. But a recorded failing result is still a failing result, so if both are entered and one fails, this page reports the failure rather than letting the other cover for it.
A chlorine result written as trace is below 0.1 mg/L and fails. Figure 3 permits the word, and reading it as missing data would turn a failing system into an incomplete form.
The eight rules this checks against
- Report submitted to the permitting authority and the owner within 14 days after the test date. “be submitted to the permitting authority and the owner within 14 days after the date the test is performed” (30 TAC §285.7(e)(1)(B))
- Test performed at least once every four months (calendar months from the previous test). “At least once every four months” (30 TAC §285.91(4), Table IV)
- With qualifying electronic monitoring, required tests may be reduced to two per year. “The number of required tests may be reduced to two per year for all systems having electronic monitoring and automatic telephone or radio access that will notify the maintenance provider of system or components failure and will monitor the amount of disinfection in the system.” (30 TAC §285.7(e)(3))
- Surface application: at least one of total chlorine residual or fecal coliform recorded. “Total Chlorine Residual or Fecal Coliform at Each Required Test” (30 TAC §285.91(4), Table IV)
- Report signed by the licensed maintenance provider. “Effective September 1, 2009, the maintenance provider must sign all maintenance reports.” (30 TAC §285.7(b)(3))
- Report includes responses to owner complaints, Figure 3 findings and Table IV test results. “include any responses to owner complaints; the results of the maintenance provider's findings as described in §285.90(3) of this title (relating to Figures) and the test results as required in §285.91(4) of this title” (30 TAC §285.7(e)(1)(A))
- Three copies: provider keeps one, one to the permitting authority, one to the owner. “Once [sic] copy shall be retained by the maintenance provider performing the maintenance. The second copy shall be sent to the local permitting authority and the third copy shall be sent to the system owner.” (30 TAC §285.90(3), Figure 3)
- Tablet or dry chlorinator uses calcium hypochlorite labeled for wastewater disinfection. “Tablet or other dry chlorinators shall use calcium hypochlorite properly labeled for wastewater disinfection.” (30 TAC §285.33(d)(2)(D))
- Sample from the pump tank sampling port. “An unthreaded sampling port shall be provided in the treated effluent line in the pump tank.” (30 TAC §285.33(d)(2)(G)(iv))
Electronic monitoring changes the count, not the spacing
With qualifying electronic monitoring, §285.7(e)(3) reduces the required tests to two per year. That is a count, not an interval — so there is no four-month spacing left to miss. With the box ticked, this page warns past six months and never fails, because the rule it would be failing you against does not exist.
Common questions
What chlorine residual passes a Texas aerobic test?
At least 0.1 mg/l total chlorine residual in the pump tank, or fecal coliform not over 200 MPN/100 ml, at each required test (30 TAC §285.91(4), Table IV).
When is the report due?
The report goes to the permitting authority and the owner within 14 days after the date the test is performed (30 TAC §285.7(e)(1)(B)).
Do drip or drainfield aerobic systems need a chlorine test?
Table IV lists no required tests for secondary treatment systems with subsurface disposal. They are still inspected at least once every four months and reported (Table XII).
Who must sign the report?
The licensed maintenance provider: “the maintenance provider must sign all maintenance reports” (30 TAC §285.7(b)(3)).