TX + NC · FREE CALCULATOR
Aerobic septic inspection & report deadline calculator
Enter the last completed inspection and the applicable interval to plan three future visits and their report deadlines. The completed visit has its own report deadline, shown separately. This is a planning aid, not a determination that a filing has been accepted.
Computed from: 30 TAC §285.91(4), Table IV; 30 TAC §285.7(e)(1)(B); 15A NCAC 18E .1304(c)
Data refreshed Oct 9, 2026.
Summarizes public rules/records as of Oct 9, 2026; not legal advice; verify with your permitting authority.
A LITTLE CONTEXT GOES A LONG WAY
Plan the visit and the report separately
For a Texas inspection completed September 10, 2026, the report deadline is September 24, 2026. The next standard visit is January 10, 2027, with its own report due January 24. Keeping these clocks separate avoids treating a future reminder as proof that the completed visit was reported.
Choose the applicable interval before exporting
Texas calculations here use the standard four-month interval and a 14-day report window. North Carolina uses the interval you select and a 30-day report window. A special monitoring arrangement, a higher-flow system or a tighter permit condition needs its own verified schedule. This page does not change those requirements.
Use one plan per system
Check the system’s last visit in your records, choose the state and review the output. Save or print a copy alongside the actual inspection record. After a late or early visit, recalculate from that actual visit and check the permit: a planning calendar is not a compliance certificate.
Continue with the maintenance tracking spreadsheet, Texas septic maintenance software or North Carolina operator software.
GOOD TO KNOW
Common questions
Which date starts the report clock?
Use the actual date the inspection was completed. Preparing a report later does not move that visit’s report deadline. Each future date assumes you complete that inspection on the planning date.
How are shorter months handled?
Month arithmetic clamps to the last day: an October 31 inspection plus four months plans the next visit for February 28, or February 29 in a leap year. The report window is then counted in days.
How do I use the calendar export?
Open the downloaded .ics file in a calendar that supports iCalendar. It contains all-day visit and report reminders, without property addresses or permit numbers. Review dates before importing; importing it repeatedly may create duplicates.
Can I use this for every NC system?
Choose the interval from your Operation Permit. Use the separate Table XXXII schedule tool for supported system rows. The permit and product approval can set additional requirements; an unknown interval should not be guessed.
CHECK THE ORIGINALS
Sources
LESS TO KEEP IN YOUR HEAD
One system is a start.
Keep your whole book in view.
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