North Carolina · FREE CALCULATOR
NC Septic Inspection Schedule Calculator: Table XXXII
Select the classification and design daily flow from the Operation Permit. The result separates Management Entity visits from local health department compliance inspections, then plans dates for the selected operating stage. Unsupported classifications need a permit-specific schedule.
| Type | Flow / stage | ME visits | LHD |
|---|---|---|---|
| IVa | Supported flow up to 3,000 gpd; permit may override | 2/year | Every 3 years |
| IVb | Supported flow up to 3,000 gpd; permit may override | 2/year | Every 3 years |
| IVc | Supported flow up to 3,000 gpd; permit may override | 1/year | Every 5 years |
| IVd | Supported flow up to 3,000 gpd; permit may override | 1/year | Every 3 years |
| Va | ≤1,500 gpd: quarterly year one / unconfirmed; twice yearly after year one when compliant. >1,500–3,000 gpd: quarterly. | 2/year* or 4/year | Every year |
| Vc | ≤1,500 gpd: quarterly year one / unconfirmed; twice yearly after year one when compliant. Above 1,500 gpd unsupported. | 2/year* or 4/year | Every year |
| Vd | ≤1,500 gpd: quarterly year one / unconfirmed; twice yearly after year one when compliant. >1,500–3,000 gpd: quarterly. | 2/year* or 4/year | Every year |
Computed from: 15A NCAC 18E .1301(b), Table XXXII; 15A NCAC 18E .1304(c)
Data refreshed Oct 8, 2026.
Summarizes public rules/records as of Oct 8, 2026; not legal advice; verify with your permitting authority.
A LITTLE CONTEXT GOES A LONG WAY
Read the permit before selecting a row
System classification, design daily flow and approval conditions are the inputs that matter. Household size is not a substitute for design flow. A site with multiple components may have a higher classification than the component you recognize; use the classification recorded for the system.
Two different inspection responsibilities
Management Entity visits maintain and monitor the system. LHD compliance inspections are a separate responsibility and appear in a separate column in Table XXXII. A twice-yearly operator visit does not replace the LHD’s inspection. The result states both frequencies to keep these duties distinct.
What this planner includes
Supported rows are IVa, IVb, IVc, IVd, Va, Vc and Vd at the flows shown in the reference table. It calculates report dates 30 days after the actual or planned inspection. It does not calculate lab sampling, manufacturer VIP tasks, wet-season conditions, permit renewal or reductions granted for a particular site.
Continue with the maintenance tracking spreadsheet, Texas septic maintenance software or North Carolina operator software.
GOOD TO KNOW
Common questions
Does LPP need quarterly visits in year one?
The maintained Table XXXII row for Type IVa LPP is two Management Entity inspections per year, with an LHD compliance inspection every three years. The quarterly first-year footnote belongs to the asterisked Type V rows.
When can a Type V schedule reduce?
For the supported asterisked rows at or under 1,500 gpd, quarterly visits apply in year one. Twice-yearly planning after that requires compliance with all OP conditions. The tool keeps quarterly planning when that status is unconfirmed.
What if my system is not listed?
Do not select a similar type to obtain an answer. Type VI, higher flows, mixed classifications and approval-specific requirements need the appropriate table row and permit. This calculator does not infer those cases.
Do the dates change automatically after year one?
No. The three planning dates use the stage you selected throughout. Recalculate when the operating stage changes, and confirm any reduction against the permit and approval.
CHECK THE ORIGINALS
Sources
LESS TO KEEP IN YOUR HEAD
One system is a start.
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