California waste code 135 Watery hazardous waste that fits no other liquid code.

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Based on California Title 22 and DTSC guidance
Nothing is stored

Inorganics
Other water-based hazardous liquid

No more specific alkaline, reactive-anion, metal or organic-residue liquid entry fits.

Water-based hazardous liquid, the catch-all when no alkaline, reactive-anion, metal or organic-residue code fits.

Is California code 135 hazardous waste?

Not from the code alone. The material must first be determined hazardous. California code 135 is not restricted, and a restricted code takes priority over it. A non-restricted code doesn't make a waste non-hazardous.

If the shipment needs the Uniform Hazardous Waste Manifest, enter 135 in Item 13 for the waste line. Use one California code, plus any federal RCRA codes when the waste is federally hazardous.

Waste is RCRA waste when it meets a federal listing or characteristic and no federal exclusion 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 135 cover?

This is the fallback for hazardous water-based liquid. Check the more specific codes first. Alkaline solutions, reactive-anion solutions, listed metals and the 2 organic-residue bands each have their own code. Water alone doesn't make a liquid hazardous.

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

Is a hazardous water-based liquid California code 135?

Code	When it fits
135	The hazardous water-based liquid fits none of the more specific aqueous or alkaline codes.
131	The liquid holds a listed reactive anion and has a pH above 2 but below 12.5.
132	The water-based liquid holds a metal named under code 121, and no restricted code applies.
133	Total organic residue is at least 10%.
134	Total organic residue is below 10%.

A restricted code takes priority. The list has no general tie-breaker when 2 non-restricted descriptions fit, and 135 is no substitute for resolving a known composition or pH question. The published pH wording for 121 and 122 conflicts, so confirm it separately.

Which wastes take California code 135?

Waste	When it’s 135
Waste antifreeze	A hazardous water-based solution that no more specific code describes.
Other aqueous waste	Analysis rules out reactive anions, listed metals and the organic-residue codes.

Which codes sit beside California code 135?

Code	What it is
122	Alkaline liquid without listed metals
123	Other alkaline liquid
141	Unused inorganic material
151	Friable or powdered asbestos
161	Used oil-refinery cracking catalyst
162	Other used catalyst
171	Sludge containing listed metals
172	Metal dust and machining waste