Washington regulates portable toilet waste as septage, and two state agencies share the work. The Department of Health oversees septage pumpers and haulers under WAC 246-272A, and Ecology oversees facilities that receive septage for treatment, beneficial use and disposal under the Biosolids Management Rule, WAC 173-308. Ecology's definition of septage includes waste from portable toilets. The archived 2020 text of WAC 246-272A-0310 requires a local health officer's approval for an individual to remove septage from an on-site system.
Key takeaways
- Portable toilet waste is septage under Ecology's definition.
- The Department of Health oversees septage pumpers and haulers under WAC 246-272A.
- Ecology oversees facilities that receive septage under WAC 173-308.
- The archived 2020 text of WAC 246-272A-0310 requires local health officer approval for an individual removing septage from an on-site system.
- No Washington rule specific to portable-toilet vehicles was found in the sources.
- Some counties issue pumper licences and set their own conditions, and those are checked locally.
What counts as septage in Washington?
Ecology's 2025 legislative report defines septage to include waste removed from septic tanks, cesspools, portable toilets, recreational vehicle holding tanks and similar systems.
The definition is what places portable toilet waste within the septage rules. A unit's contents are therefore handled under the same framework as a septic pump-out, even though the source is a rented unit on a job or at an event.
A site should not assume that the rules for portable toilets are lighter than the rules for septage, because the definition puts them in the same category.
What does the Department of Health regulate?
The Department of Health oversees the pumpers and haulers who remove and carry septage, under WAC 246-272A.
The state rule governs who may pump and haul septage, and it sets the conditions for the vehicle and the work. A hauler is the business that moves the waste, so the authorization sits with the hauler, not with the rental company.
Some counties issue the pumper licence themselves, and their codes can add requirements the state text does not state.
What does Ecology regulate?
Ecology oversees the facilities that receive septage for treatment, beneficial use and disposal, under the Biosolids Management Rule, WAC 173-308.
The receiving facility is the end of the chain, and the hauler names it on each visit record. The site should check that the facility is permitted to receive septage.
The Ecology report is the source for the division of responsibility between the Department of Health and Ecology.
What does the archived local-approval rule say?
The archived 2020 text of WAC 246-272A-0310 says a local health officer must approve an individual before that person removes septage from an on-site sewage system, and that a hauler's vehicle must bear the business name.
The text read for this page was archived in 2020, so the current wording should be confirmed with the Department of Health before it is quoted in a permit or a contract.
Local practice differs by county, and the local health jurisdiction is the place to ask for its current requirement.
Can one county's rules be assumed in another?
No. One county's pumper code requires an annual licence, the firm's name on the vehicle and a spill kit, but that code belongs to the county and is not assumed to apply in King County.
A site in King County should ask the local health officer for the county's own requirement, rather than relying on a code from another county.
The answer is recorded with the rental file, so the site can show what it relied on.
What should a site ask before the first visit?
Which authority issued the hauler's authorization, whether a local health jurisdiction approved the work, which facility receives the waste, and where the record of each visit is kept.
A hauler that can answer those four questions on the phone is showing that it holds its authorizations and knows where the waste goes.
The answers are kept with the rental file, and the first visit waits until they are given.
What does a site's record of the waste need to show?
The hauler, the vehicle, the date and time, the volume taken from each unit, the facility the waste went to and the receipt where one is given.
A record that names the facility is the proof the waste reached a permitted place, and a site that keeps those records can answer a question months later.
The records are kept in date order with the rental file, so any visit can be found quickly.
Who is responsible if a load is refused?
The hauler is responsible for a refused load and must take it back, and the site must not let it stand on the site or be dumped elsewhere.
A load refused at a facility is a problem for the hauler to solve under its authorization, and the site must refuse to accept any other handling.
The reason for the refusal is recorded with the time, so the record is complete.
How is a spill handled?
The spill is reported to the provider at once and to the local health officer, the area is kept clear, and the clean-up follows the hauler's procedure.
A spill on a road or a lot is a public-health matter, and the people around it are kept away until the clean-up is finished.
The report names the place, the time and the amount, and the hauler records its own response in the visit log.
How does a site verify a hauler's authorization?
By asking for the authorization number, checking which authority issued it, and confirming with that authority that the authorization is current.
A phone call to the issuing office is quick, and it gives a dated answer the site can file with the rental record.
A hauler who cannot give the number or the issuing authority should not be used until it can.
What if the local health officer's approval is required?
The site asks the hauler for the local approval for each town and county where the work happens, and checks that the approval covers the work being done.
A local approval that covers one county does not cover a visit in another, so the site checks each location against the approval.
The approval is kept with the rental file and copied to the provider, so both parties work from the same paper.
What should the site do after a visit?
Check the visit record, confirm the facility named on it, and file the receipt where one is given, so the chain of custody is complete.
A visit record without a facility name is incomplete, and the site asks the hauler to add it.
The filed records are reviewed at the end of each month, so a gap is found while the visit is still recent.
What does a hauler's vehicle need to show?
The business name on the vehicle, which the archived local-approval text requires, and whatever markings the local health officer requires for its area.
A vehicle without the business name on it makes the hauler harder to trace, and the site checks the name before the visit.
The vehicle's markings are checked on each visit, since a hauler may use more than one vehicle in a season.
What if an approval is withdrawn during a job?
The site stops using that hauler at once, asks the provider to name a hauler with a current approval, and records the change and its date.
A withdrawn approval is a stop, and the waste already in the units is handled by an approved hauler without delay.
The change is recorded with the new hauler's approval, so the chain stays complete from the first visit to the last.
How are records of a hauler's visits kept for a season?
A season's records are bound together by hauler and by site, with the receipts in date order, so a question about any visit in the season is answered from one place.
A season file avoids searching many loose records when an inspector or a neighbor asks about an earlier visit.
The file is closed at the end of the season and kept with the rental records.
How does the site confirm a receiving facility's permit?
The facility's name is checked against the Ecology listing or the facility's own permit, and the check is recorded with its date.
A facility that receives septage must hold its own permit, and a site that asks for it avoids a load that cannot be lawfully accepted.
The check is repeated at the start of each season, since permits can change.
Frequently asked questions
Is portable toilet waste septage in Washington?
Ecology's 2025 report defines septage to include waste removed from portable toilets.
Who oversees the hauler?
The Department of Health, under WAC 246-272A.
Who oversees the receiving facility?
Ecology, under the Biosolids Management Rule, WAC 173-308.
Is there a rule for the portable-toilet vehicle?
No Washington rule specific to portable-toilet vehicles was found in the sources.
Is the text current?
The text read for this page was archived in 2020. Confirm the current wording with the Department of Health.
Do county rules differ?
Yes. Some counties issue pumper licences and set their own conditions, so the local health officer is asked.
Sources
- Washington Department of Health, septage pumpers and haulers (WAC 246-272A)
- Washington Department of Ecology, Biosolids Management Rule (WAC 173-308)
- Washington State Legislature, Washington Administrative Code
This guide is general information for King County homeowners, not a substitute for an on-site inspection. Prices are estimates. See our disclaimer.