Fillable checklist

Septic Inspection Checklist: Tank, Drainfield, and Fixtures (Free Printable PDF)

Fillable septic inspection form for tank lids, drainfield signs, pumps, fixture backups, and pumping records. Print blank or save a filled PDF.

Inspections Fillable form · 7 sections · 34 checks Download filled or blank PDF and CSV Cross-checked against EPA SepticSmart, InterNACHI SOP, and ASHI SOP · Last verified Sep 1, 2026

Snugage fillable checklist

Fill this on screen, then download a PDF or CSV. Download a blank copy to complete by hand. Answers stay in this tab only. The next visitor sees a blank form. This is a visual owner walk of a US house septic system: tank access and lids, drainfield wet or lush signs, pumps and alarms if present, household fixtures backing up, and the pumping record. It is not a licensed septic-pumper inspection. Mark N/A on pumps if the system is gravity only.

  • 7 sections
  • 34 checks
  • Blank for each visitor

Form details

Property

This is a visual template, not a licensed septic-pumper inspection and not a general home inspection. EPA: individual onsite systems are regulated by states, tribes, and local governments, not the federal government. Do not treat one state's permit fields as federal law. InterNACHI and ASHI do not require a home inspector to inspect septic systems, cesspools, or drainfields.

10 fields
Property

EPA lists conventional tank-and-trench, chamber, mound, aerobic, drip, and other alternatives. Local soil and permits decide the type. Mark pump lines N/A on a gravity-only conventional system.

EPA: a professional inspection reviews system age. EPA also notes many drainfields older than 25 to 30 years may be near the end of useful life. That is planning guidance, not a visual Pass/Fail.

EPA: pumping frequency depends on household size, wastewater volume, solids, and tank size. State sizing rules vary. Do not treat one state's gallon table as federal.

EPA: local health or environmental departments typically keep the as-built and permit. That is the first place to find tank and drainfield location.

Dry, raining, or recent heavy rain. EPA: spongy soil after no significant rain is a stronger failure clue than wet ground right after a storm.

Form details

Pumping and service record

Record dates from receipts or the last service report. Do not open the tank or measure sludge on this walk. EPA sludge and scum numbers are for a septic service professional.

7 fields
Pumping and service record

EPA: household tanks are typically pumped every 3 to 5 years. Actual need depends on tank size, occupants, water use, garbage disposal use, and solids. A missing date is a record gap, not a sludge measurement.

EPA How to Care: inspect at least every three years by a professional. EPA FAQ: inspect every 1 to 3 years. EPA Homebuyer guide: some text says inspect every 3 to 5 years. Those are not one Pass/Fail pair. Write the date on your service report.

EPA: a typical professional inspection opens tanks, measures sludge and scum, checks baffles and filters, and may look at the distribution box. This form does not replace that visit. In many states a sale requires a licensed inspection. That is state law, not a federal form.

EPA: an effluent filter should be included in inspection and maintenance. Cleaning it is professional or trained-owner work, not this visual walk.

EPA: alternative systems with electrical floats, pumps, or mechanical parts should generally be inspected once a year. A service contract is important for those systems. Mark N/A on a gravity-only conventional system.

Inspection station

Tank access and lids

Find the tank from the as-built, lids, or risers. Do not enter the tank. InterNACHI: methane can cause rapid asphyxiation, and a weak lid can collapse. A professional pumper opens the tank.

9 items
Tank access and lids

Tank location identified

EPA: follow the plumbing outlet, look for an access riser (often a black or green disc), or use the as-built. EPA says the tank is usually about 10 feet from the building. That is typical, not a federal setback. Local health departments set isolation distances.

Tank location identified: OK, Defect, or N/A

Lids, risers, or manhole covers found

EPA Homebuyer guide: check the yard for inspection caps, lids, or manhole covers. InterNACHI: newer tanks often have risers at grade. Mark Defect if you cannot find any access after checking records and the outlet line.

Lids, risers, or manhole covers found: OK, Defect, or N/A

Lids intact, seated, and secure

EPA landscaping: make sure the tank lid is secure. InterNACHI: inspect riser lids for cracks and confirm they are secure. Beware homemade lids or rusting metal. Do not walk on a lid that looks weak.

Lids intact, seated, and secure: OK, Defect, or N/A

Access clear enough for a pumper to reach the tank

EPA: place the tank where it is accessible for future inspections and pump-outs. Decks, sheds, or heavy plantings over the lid are a defect for this walk. Do not dig to expose a buried lid unless you are trained to do so.

Access clear enough for a pumper to reach the tank: OK, Defect, or N/A

No parking or driving on the tank

EPA: do not park or drive on the drainfield. The same compaction and lid-crush risk applies over the tank. InterNACHI: cars should not be driven on or near the drainfield.

No parking or driving on the tank: OK, Defect, or N/A

No sewage, standing water, or damp spots at the tank

EPA failure signs: standing water or damp spots near or over the septic tank, and pooling water or muddy soil around the system. Mark Defect for surfacing wastewater. Wet soil only right after rain belongs in Notes.

No sewage, standing water, or damp spots at the tank: OK, Defect, or N/A

No strong sewage odor at the tank

EPA: a strong odor around the septic tank is a malfunction sign. EPA also says a roof plumbing vent can smell without a failed field. Soft, wet, or spongy soil with odor, especially with no recent rain, is a stronger clue. Call a septic professional if you cannot tell the source.

No strong sewage odor at the tank: OK, Defect, or N/A

Ground and lid over the tank look stable

InterNACHI: if a tank shows signs of weakness, tread with caution. Collapse can be fatal. Watch for sagging soil, an open hole, rusting metal, or a homemade lid. Stay off it and call a professional.

Ground and lid over the tank look stable: OK, Defect, or N/A

No straight pipe discharging untreated wastewater to the ground

EPA lists a straight pipe to the ground surface as a common sign of a failing or illegal system. Mark N/A only if you walked the outlet area and found none. Report it to the local health department if you see one.

No straight pipe discharging untreated wastewater to the ground: OK, Defect, or N/A

Inspection station

Drainfield

Walk the known field, mound, or reserve area. Do not excavate laterals or open a distribution box. EPA professional inspections may do that. This station is surface signs and land use only.

11 items
Drainfield

Drainfield location identified

EPA: as-built drawings, a mound or small hill, and a septic professional can locate the field. Some systems have inspection caps. Mark Defect if nobody on site can show the field and no record exists.

Drainfield location identified: OK, Defect, or N/A

No standing water, muddy soil, or damp spots over the field

EPA: standing water or damp spots over the drainfield, and pooling or muddy soil, are failure signs. EPA professional inspections look for surfacing or unequal drainage. Soft, wet soil with no recent rain is a stronger clue than a wet lawn after a storm.

No standing water, muddy soil, or damp spots over the field: OK, Defect, or N/A

No bright green, spongy grass over the field in dry weather

EPA How to Care, SepticSmart, and malfunction FAQ: bright green, spongy lush grass over the tank or drainfield, even during dry weather, is a failure sign. Ordinary even lawn color in a wet season is not by itself a fail.

No bright green, spongy grass over the field in dry weather: OK, Defect, or N/A

No sewage odor at the drainfield

EPA: sewage odors around the drainfield are a malfunction sign. Pair odor with wet or spongy soil. A brief plumbing-vent smell at the roof is not this line.

No sewage odor at the drainfield: OK, Defect, or N/A

No vehicles, equipment, or livestock on the field

EPA: drainfields are not designed for vehicles or heavy equipment. Weight compacts soil and can damage pipes. EPA Homebuyer: keep the car and anything heavier than a lawnmower off the field. EPA landscaping also lists livestock as a break risk.

No vehicles, equipment, or livestock on the field: OK, Defect, or N/A

No sheds, decks, patios, pools, or play equipment on the field

EPA: do not build structures on the drainfield without the local permitting authority. EPA landscaping: keep decks, patios, sports courts, sheds, swing sets, sand boxes, driveways, and pools off the tank and field.

No sheds, decks, patios, pools, or play equipment on the field: OK, Defect, or N/A

No concrete, asphalt, or other impermeable cover on the field

EPA: impermeable materials such as concrete and asphalt should not be laid on a drainfield because they cut evaporation and oxygen the soil bacteria need.

No concrete, asphalt, or other impermeable cover on the field: OK, Defect, or N/A

Trees and large shrubs not planted on the field

EPA: plant trees the appropriate distance so roots do not grow into the system. A septic professional advises the distance for your tank and landscape. EPA does not set one federal foot number. Do not invent a 20-foot Pass/Fail. Mark Defect for trees or large shrubs on the laterals you can identify.

Trees and large shrubs not planted on the field: OK, Defect, or N/A

No vegetable garden on the field

EPA: it is not recommended to plant vegetable gardens on the drainfield. Vegetables can be exposed to sewage effluent. Native grasses and ground covers are the appropriate planting.

No vegetable garden on the field: OK, Defect, or N/A

Roof drains, sump pumps, and surface water directed away from the field

EPA: keep roof drains, sump pumps, and other rainwater drainage away from the drainfield. Excess water slows or stops treatment. EPA landscaping: direct all surface drainage away from the septic system.

Roof drains, sump pumps, and surface water directed away from the field: OK, Defect, or N/A

Grass or native cover, not plastic sheeting or heavy fill

EPA landscaping: plant grass or keep native vegetation. Do not put plastic sheets, bark, gravel, or other fill over the field. A couple of inches of topsoil is generally OK. Do not reshape the reserve area or add a pond.

Grass or native cover, not plastic sheeting or heavy fill: OK, Defect, or N/A

Inspection station

Pumps and alarms

Mark every line N/A on a gravity-only conventional system with no pump tank or alarm. Do not open a pump chamber or test live electrical parts. EPA: alternative systems with floats, pumps, or mechanical components should generally be inspected once a year.

6 items
Pumps and alarms

Pump, float, alarm, or alternative unit identified, or N/A if gravity only

EPA types: mound, drip, aerobic, and some sand-filter systems use a pump chamber. Conventional gravity tank-and-trench often has none. If you cannot tell, use Unknown in Notes and mark Defect only when a labeled panel or pump lid is present but ignored.

Pump, float, alarm, or alternative unit identified, or N/A if gravity only: OK, Defect, or N/A

Alarm panel or warning light visible and not in alarm

EPA professional inspections verify electrical connections, pumps, controls, and wiring. On this walk, look at the panel you can see without opening enclosures. An alarm in the on state is a defect. Mark N/A if there is no alarm.

Alarm panel or warning light visible and not in alarm: OK, Defect, or N/A

Pump tank lid present, secure, and not driven on

Same lid rules as the septic tank. EPA: keep access for inspection. InterNACHI: secure riser lids. Mark N/A if there is no separate pump tank.

Pump tank lid present, secure, and not driven on: OK, Defect, or N/A

Visible electrical boxes and wiring not broken or sitting in water

Look only at what is in plain sight. Do not remove covers or operate breakers. Damaged conduit, an open box, or a panel in standing water is a defect. Mark N/A if no electrical gear is part of the system.

Visible electrical boxes and wiring not broken or sitting in water: OK, Defect, or N/A

Annual professional service or a current contract for pumped or alternative systems

EPA: inspect alternative systems with electrical parts generally once a year, and keep a service contract. Mark N/A on gravity-only. A missing contract with no recent service is a record defect, not a pump-performance test.

Annual professional service or a current contract for pumped or alternative systems: OK, Defect, or N/A

Occupant reports no unexplained recent alarms

Ask the occupant. EPA: pumps and controls often last 10 to 20 years. Repeated alarms need a septic service professional. Mark N/A if the house is vacant and no one can report.

Occupant reports no unexplained recent alarms: OK, Defect, or N/A

Inspection station

Household fixtures

Run toilets, sinks, tubs, and showers you can use. Backup, slow drains throughout the house, and gurgling are EPA malfunction signs. A single clogged fixture can be plumbing, not the field. Do not flood-test the system.

8 items
Household fixtures

Toilets flush without wastewater backing up

EPA: water and sewage from toilets backing up into the home is a failure sign. Stop using water and call a septic professional or the local health department if sewage enters the house. Avoid contact with sewage.

Toilets flush without wastewater backing up: OK, Defect, or N/A

Sinks, tubs, and showers drain without backing up

EPA: backup into drains and sinks is a malfunction sign. Lowest fixtures often show it first. Mark Defect for sewage or wastewater returning at a fixture.

Sinks, tubs, and showers drain without backing up: OK, Defect, or N/A

Fixtures are not draining very slowly throughout the house

EPA: bathtubs, showers, and sinks draining very slowly is a failure sign. One slow bath trap can be a local clog. Several fixtures slow at once points to the septic line or field.

Fixtures are not draining very slowly throughout the house: OK, Defect, or N/A

No gurgling in drains when other fixtures run

EPA: gurgling sounds in the plumbing system are a malfunction sign. EPA Homebuyer text pairs backup and gurgling. Note which fixtures gurgled.

No gurgling in drains when other fixtures run: OK, Defect, or N/A

No sewage odor at indoor drains

EPA: indoor odor may be a roof vent, a clogged vent, or a failing field. Soft, wet soil at the field with odor is a stronger septic clue. A plumbing-vent smell only at the roof can stay OK with a note.

No sewage odor at indoor drains: OK, Defect, or N/A

Toilets not running or leaking into the bowl

EPA How to Care and SepticSmart: a single leaky toilet can add as much as 200 gallons of water per day to the system. WaterSense Fix a Leak: dye in the tank that shows in the bowl after about 10 minutes means a leak. SepticSmart describes an overnight dye check. Either showing dye is a leak. Do not treat 200 gallons as a measured Pass/Fail on this walk.

Toilets not running or leaking into the bowl: OK, Defect, or N/A

No dripping faucets or showerheads adding constant flow

EPA: all indoor water ends up in the septic tank. WaterSense: a faucet dripping once per second can waste more than 3,000 gallons per year. Mark Defect for an obvious drip you can see or hear.

No dripping faucets or showerheads adding constant flow: OK, Defect, or N/A

No pooling wastewater in a basement near the system

EPA SepticSmart: pooling water or muddy soil around the system or in your basement is a call-a-professional sign. Mark N/A if there is no basement. Sewage cleanup needs protective clothing. EPA flood guidance uses a 10 percent household bleach mix for disinfection after sewage contact. That is cleanup, not this visual tick.

No pooling wastewater in a basement near the system: OK, Defect, or N/A

Form details

Findings and sign-off

List every Defect line here. This worksheet is not a licensed septic inspection, not a home inspection report, and not an official health-department form.

5 fields
Findings and sign-off

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Draw your signature, or upload an image to replace it.

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References

  1. EPA, How to Care for Your Septic System (inspect and pump, drainfield care, water use, waste disposal)
  2. EPA, Why Maintain Your Septic System (owner duty, 1 to 3 year inspection, 3 to 5 year pumping, pump life)
  3. EPA, Frequent Questions on Septic Systems (locating the tank, as-built records, state regulation, failure signs, professional inspection steps)
  4. EPA, Resolving Septic System Malfunctions (failure signs, professional inspection scope, sewage backup health steps)
  5. EPA, Types of Septic Systems (conventional, chamber, mound, aerobic, drip, and other alternatives)
  6. EPA SepticSmart, A Homeowners Guide to Septic Systems (failure symptoms, sludge and scum pumping triggers, leaky toilet load)
  7. EPA, New Homebuyer's Guide to Septic Systems (as-built, pre-purchase professional inspection, pumping records)
  8. EPA, Proper Landscaping On and Around Your Septic System (secure lids, no paving or structures, grass cover, no vegetable gardens)
  9. EPA WaterSense, Fix a Leak Week (toilet dye check and household leaks that load a septic tank)
  10. InterNACHI Home Inspection Standards of Practice (inspectors are not required to inspect septic systems, cesspools, or drainfields)
  11. InterNACHI, Septic System Inspections (locate lids and risers, pumping date, do not enter the tank, visual failure signs)
  12. ASHI Standard of Practice (current page): inspector is not required to inspect septic or other sewage disposal systems
  13. ASHI Standard of Practice for Home Inspections, 2026 approved text, plumbing exclusions for septic and wastewater treatment

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These checklists are provided for general reference only. Always verify the steps against local codes, a licensed inspector or a qualified contractor before relying on them, especially for safety-critical work.