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Washington septic rules

Septic pumping rules in Washington.

In Washington, pumpers are licensed or permitted locally, by the county or local health department. Below: who regulates, what pumpers have to keep, and where to find the official forms. Checked against official sources on October 8, 2026.

Go to the forms

The rules

What a pumper in Washington should know.

A guide, not legal advice. Counties and local health departments can add their own rules on top of the state's, so check with the county where the system is.

Who regulates septic systemsRun by county and local health departments

Washington State Department of Health, Wastewater Management (On-Site Sewage Systems). DOH and the State Board of Health set the statewide on-site sewage rule (chapter 246-272A WAC), but local health officers approve pumpers, installers and maintenance service providers, permit systems and set reporting requirements in each local health jurisdiction.

The state program
Pumper and hauler licensingLocal permit

WAC 246-272A-0340 requires OSS installers, pumpers and maintenance service providers to obtain approval from the local health officer before providing services, and required local health officers to set approval procedures by February 1, 2025 (reciprocity between jurisdictions is allowed). Under WAC 246-272A-0310, septage may be transported only in vehicles clearly identified with the business name and approved by the local health officer.

Licensing details
Where septage can go

WAC 246-272A-0310 requires septage to be disposed of, or septage biosolids land applied, only in a manner consistent with applicable laws. Land application of septage is governed by Department of Ecology rule WAC 173-308-270, which bars application to public contact sites, lawns or home gardens and requires pathogen and vector attraction reduction (injection, incorporation within six hours, or raising pH to 12 for 30 minutes).

Disposal rules
Records and reports

Pumpers must record and report septage removal as required by the local health officer (WAC 246-272A-0310). OSS owners must have systems inspected by an authorized maintenance service provider at least every three years for gravity systems and annually for others, with results submitted to the local health jurisdiction (WAC 246-272A-0270).

Reporting rules
Inspections

Beginning February 1, 2027, at property transfer the owner must obtain an inspection by a third-party inspector authorized by the local health officer (WAC 246-272A-0270(1)(k)); the local health officer may waive it if the system is current on required inspections.

Inspection rules
The rule book

Chapter 246-272A WAC (On-Site Sewage Systems), including 246-272A-0270, -0310, -0340; WAC 173-308-270 (septage applied to land)

Official forms

Get the forms from the source.

We link to the state's own pages instead of keeping copies, because forms change. Your county may use its own forms as well, and those are the ones an inspector will expect.

We did not find a statewide forms page for pumpers in Washington. Ask the state program or your county health department for the current forms.

In PortaPro

Upload your county's form once. Fill it from every job.

Your form, filled from the job

Upload the current PDF from your county or the state, place the fields on it, and bind them to job data. Each pump-out fills it with the customer, site, tank, gallons pumped and technician, and you download a finished PDF.

How Regulatory Forms works
Service reports on the driver's phone

Every account comes with a septic inspection checklist and a pumping service report with gallons pumped and a disposal manifest. Drivers fill them on site and they are filed with the job.

PortaPro for septic companies
Prefer paper for now

Print our free septic pumping service report. It has the fields most programs ask for.

Free septic service report

Questions

Do I need a license to pump septic tanks in Washington?

In Washington, pumpers are licensed or permitted locally, by the county or local health department. WAC 246-272A-0340 requires OSS installers, pumpers and maintenance service providers to obtain approval from the local health officer before providing services, and required local health officers to set approval procedures by February 1, 2025 (reciprocity between jurisdictions is allowed). Under WAC 246-272A-0310, septage may be transported only in vehicles clearly identified with the business name and approved by the local health officer.

Where do I get Washington septic forms?

We did not find a statewide forms page for pumpers. Ask the Washington State Department of Health, Wastewater Management (On-Site Sewage Systems) or the county health department where the system is.

Does PortaPro come with Washington forms built in?

No. Forms change, and counties use their own, so PortaPro doesn't ship copies. You upload the current PDF from your county or state once, place the fields on it, and PortaPro fills it from each job: customer, site, tank, gallons pumped and technician. When the agency updates its form, you upload the new one.

How current is this page?

We read the official sources listed at the bottom on October 8, 2026. Rules and forms change, so treat this as a starting point and confirm with the agency before you rely on it. This is not legal advice.

Sources

Official pages we read on .

Other states

Keep the county's paperwork with the job.

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