How to file a septic inspection report in New Hampshire

What New Hampshire requires at property transfer

When an inspection is triggered

Transfer of waterfront property where any portion of the septic system lies within 250 feet of the reference line.

Scope

Applies when any portion of the septic system is within 250 feet of the reference line of a lake, pond, river or coastal water.

Inspector credentials

Evaluation must be performed by an evaluator qualified under NHDES rules.

Report validity period

The buyer may accept a seller septic system evaluation completed within 180 days before the transfer.

Pumping requirement

Verify pumping requirements with NHDES and the municipality.

Failure and repair rules

Failed systems are addressed under NHDES subsurface rules.

Exemptions

Non-waterfront transfers are generally outside this requirement — verify with NHDES.

How the report is filed

Submission method

Form W-05-015 is completed online and submitted to NHDES when notification is required.

Who receives the report

Buyer receives the evaluation. Alternatively the buyer may elect to repair or replace the system within 180 days of transfer using form W-05-016.

Copies required

Buyer copy required · Seller copy required · Government filing required

Local jurisdiction involvement

County or municipal rules can add requirements on top of the state rule. Confirm with the approving authority.

Local notes

Municipal requirements may also apply.

Official New Hampshire forms

• Septic System Evaluation Report for Waterfront Property Transfer (NHDES-W-05-015)

  Open the official form

• Septic System Evaluation Report (waterfront property transfer)

  Open form

• Buyer notification of intent to repair or replace the septic system (W-05-016)

  Open form

Filing checklist for inspectors

1. 1. Confirm the governing authority. Primary source: New Hampshire Department of Environmental Services (NHDES).
2. 2. Use the correct form. File on the official state form when one exists; otherwise use the form the local approving authority accepts.
3. 3. Document the system. Tank, distribution, drainfield and dated photos, captured in the field so the report is complete on site.
4. 4. Sign and certify. Include the inspector name, license number and title on the certification line.
5. 5. Deliver and retain. Send the report to every required recipient and keep your copy per state record-keeping rules.

Regulatory requirements change and may vary by local jurisdiction. Verify current requirements with the applicable state/local authority. Septic Pro Connect does not provide legal advice. Library entry last verified 08/17/2026.