California waste code 531 Contents of portable & chemical toilets.

Free, no account
Based on California Title 22 and DTSC guidance
Nothing is stored

Miscellaneous
Chemical toilet waste

The hazardous contents came from a portable or chemical toilet.

Hazardous waste emptied from a portable or chemical toilet. Sewage treatment sludge takes code 321.

Is California code 531 hazardous waste?

Not from the code alone. Waste must first be found hazardous. Code 531 isn't a restricted code, but a restricted category that fits takes priority over it. A code that isn't restricted doesn't make waste non-hazardous.

When a shipment needs the Uniform Hazardous Waste Manifest, enter 531 in Item 13 for the waste line. Use one California code, plus the federal RCRA codes when the waste is federally hazardous.

RCRA waste meets a federal listing or characteristic, with no federal exclusion that applies. Non-RCRA waste is hazardous under California rules only. California presumes hazardous waste is RCRA unless the generator shows it isn't, so keep that determination.

What does California code 531 cover?

This code is for the contents of a portable or chemical toilet, only once a hazardous listing or characteristic has been shown. Routine toilet sewage isn't hazardous waste from its source alone.

Official wording: 22 CCR division 4.5, chapter 11, Appendix XII(b)

Is toilet waste California code 531?

Code	When it fits
531	Chemical-toilet contents have an applicable hazardous listing or characteristic.
321	Sewage treatment produced the hazardous sludge.
No California hazardous waste code	Routine portable-toilet sewage has no hazardous listing or characteristic.

Where the waste came from and whether it is hazardous are separate facts. A manifest and code 531 follow only when the material is hazardous waste.

Which wastes take California code 531?

Waste	When it’s 531
Chemical toilet waste	The toilet waste has a hazardous chemical constituent, listing or characteristic

Which codes sit beside California code 531?

Code	What it is
511	Large pesticide container
512	Large non-pesticide container
513	Small hazardous-waste container
521	Mud from drilling
541	Photographic processing chemicals
551	Discarded laboratory chemicals
561	Discarded detergent or soap
571	Fly, bottom or retort ash