Hazardous Waste Regulations UK: When Do Different Rules Apply?

What Makes Waste Hazardous?

Hazardous waste is a legal classification, not simply a description of waste that looks or smells dangerous. In England and Wales, the classification is governed by the Hazardous Waste (England and Wales) Regulations 2005 (SI 2005/894), as amended. A waste is legally classified as hazardous, and therefore subject to the separate, more demanding documentation and management regime, if it meets any one of three criteria.

First, it may be an absolute hazardous entry in the List of Wastes (the UK's post-Brexit version of EU Commission Decision 2000/532/EC, retained in domestic law). The List of Wastes uses the same six-digit coding system as the European Waste Catalogue (EWC). Entries marked with an asterisk (*) are absolute hazardous entries, they are hazardous regardless of their specific composition or the concentration of any hazardous component. Examples include asbestos-containing construction material (17 06 05*) and waste solvents containing halogenated compounds (14 06 01*). If your waste has an asterisk-coded EWC code, it is always hazardous.

Second, it may be a mirror entry waste. Some waste types appear twice in the List of Wastes, once as a hazardous entry (with an asterisk) and once as a non-hazardous entry (without). For example, soil and stones may be either 17 05 03* (hazardous, containing hazardous substances) or 17 05 04 (non-hazardous). For mirror entries, the waste must be assessed to determine which classification applies, based on whether it exhibits one or more hazard properties (HP1–HP15). If it does, use the hazardous code; if not, use the non-hazardous code.

Third, a waste may not appear in the List of Wastes at all, but if it exhibits one or more of the 15 hazard properties (HP1–HP15), it is classified as hazardous and the hazardous waste regime applies.

The 15 Hazard Properties: HP1 to HP15

The hazard properties system provides a structured framework for assessing whether a waste poses hazardous characteristics. The 15 HP properties, derived from EU Regulation 1357/2014 (as retained in UK law post-Brexit), are:

• HP1, Explosive: Waste which by chemical reaction can produce gas at a temperature and pressure and speed such as to cause damage to its surroundings.
• HP2, Oxidising: Waste which may cause or contribute to the combustion of other materials by providing oxygen or other oxidising substances.
• HP3, Flammable: Waste which is a liquid with a flash point below 60°C, or is a flammable gas, solid, or self-reactive material, or emits flammable gases in contact with water.
• HP4, Irritant: Waste which when in contact with skin, eyes, or airways causes damage or irritation without being corrosive.
• HP5, Specific Target Organ Toxicity (STOT) / Aspiration Toxicity: Waste which causes specific target organ toxicity by single or repeated exposure, or which causes serious hazard to human health if aspirated.
• HP6, Acute Toxic: Waste which can cause acute toxic effects following oral, dermal, or inhalation exposure.
• HP7, Carcinogenic: Waste which causes cancer or increases the incidence of cancer in organisms exposed to it.
• HP8, Corrosive: Waste which by chemical action destroys living tissue on contact.
• HP9, Infectious: Waste which contains viable micro-organisms or their toxins which are known or reliably believed to cause disease in humans or other living organisms.
• HP10, Toxic for Reproduction: Waste which has adverse effects on sexual function and fertility or causes developmental toxicity in offspring.
• HP11, Mutagenic: Waste which may cause mutation (permanent change to genetic material) in cells.
• HP12, Release of Acute Toxic Gas: Waste which releases acute toxic gases on contact with water or acid.
• HP13, Sensitising: Waste which contains one or more substances known to cause sensitising effects to the skin, eyes, or respiratory tract.
• HP14, Ecotoxic: Waste which presents or may present immediate or delayed risks for one or more sectors of the environment.
• HP15, Waste Capable of Exhibiting HP Properties After Disposal: Waste which does not directly display HP1 to HP14 but can exhibit such properties after disposal, for example by leaching of substances into soil or water.

Assessment against these properties typically involves reviewing the known composition of the waste, checking Safety Data Sheets for its component substances, and applying concentration threshold tests. For many common business waste types, the hazardous/non-hazardous classification is well-established, waste solvents containing defined concentrations of specific chemicals are categorically hazardous. For unusual or composite waste streams, formal assessment by an environmental consultant may be necessary.

The List of Wastes

The List of Wastes is the UK's classification tool, derived from EU Commission Decision 2000/532/EC (the European Waste Catalogue) as retained in UK domestic law following the European Union (Withdrawal) Act 2018. In post-Brexit UK, the codes remain identical to the EWC codes used across the EU, the numbering system and the waste descriptions have not changed.

The List of Wastes is structured in 20 Chapters, each covering a broad category of waste origin or type. Chapter 17 covers construction and demolition waste; Chapter 20 covers municipal solid waste; Chapter 13 covers oil waste and liquid fuel waste; and so on. Within each Chapter, waste types are classified at increasing specificity using the three-level hierarchy of the code.

Key points about the List of Wastes structure:

• Absolute hazardous entries (asterisk only): The code appears in the list once, with an asterisk. Always hazardous.
• Mirror entries (appear twice): The code appears in the list twice, once with an asterisk (hazardous) and once without (non-hazardous). Assessment of the specific waste is required to determine which applies.
• Absolute non-hazardous entries (no asterisk): The code appears in the list once, without an asterisk. Always non-hazardous, a standard WTN applies.

The full List of Wastes is available from the Environment Agency and is set out in the List of Wastes (England) Regulations 2005 (as amended). Businesses uncertain about whether their waste is in the list, or which entry applies, should consult the EA guidance or seek specialist advice.

When a Standard WTN Is Not Sufficient

A standard waste transfer note cannot be used for hazardous waste. The moment a waste is classified as hazardous, whether through an absolute asterisk entry, a mirror entry assessment, or an HP property analysis, the Hazardous Waste (England and Wales) Regulations 2005 apply, and a consignment note is required instead.

Using a standard WTN for a hazardous waste movement is an offence under the 2005 Regulations. It is not a defence to claim that the content of the document was otherwise correct, that the waste was disposed of at a licensed facility, or that no environmental harm resulted. The wrong document type for hazardous waste is itself the offence.

There is also a producer registration requirement: any premises (other than domestic properties) that produces hazardous waste must register as a hazardous waste producer with the Environment Agency if they produce 500 kg or more of hazardous waste in any consecutive 12-month period. The registration fee is currently £18. The registration number assigned must appear on all consignment notes. Failure to register is a separate offence. Note that premises below the 500 kg threshold are exempt from registration but are still subject to all other hazardous waste requirements, including the consignment note obligation.

Hazardous Waste Consignment Notes

The consignment note is the primary documentation instrument for hazardous waste movements in England and Wales. It is governed by Schedule 2 of the Hazardous Waste (England and Wales) Regulations 2005 and must contain significantly more information than a standard WTN.

A consignment note must include:

• Full details of the consignor (producer/holder of the waste), including their registered premises reference number where applicable
• Full details of the carrier, including their waste carrier registration number
• Full details of the consignee (the facility receiving the waste), including their environmental permit number
• A description of the waste, the EWC code (must be an asterisk code or appropriate hazardous mirror entry code), and the hazard properties (HP codes) exhibited by the waste
• The quantity of waste (in tonnes or kilograms)
• The type and number of containers
• UN classification for transport (for applicable waste types, consistent with the Carriage of Dangerous Goods and Use of Transportable Pressure Equipment Regulations 2009)
• Special handling requirements
• Declaration by the carrier that they are authorised to carry the specific waste

The consignment note has a multi-part structure. The consignee (receiving facility) must return a completed copy to the consignor within 72 hours of receiving the waste, confirming receipt. All parties, consignor, carrier, and consignee, must retain their copies for three years from the date of the transfer.

For certain hazardous waste movements, pre-notification to the EA is required. This applies where the waste is being moved across an EA region boundary or where specific waste types require advance notification, consult current EA guidance for the applicable circumstances, as these requirements have evolved over time.

Hazardous Waste Producer Registration

The hazardous waste producer registration system exists to create an official record of premises where hazardous waste is generated, enabling the EA to monitor hazardous waste flows from source to final disposal.

Registration is required for any non-domestic premises producing 500 kg or more of hazardous waste in any 12-month period. The registration:

• Is premises-specific, each site must be registered separately
• Costs £18 per premises (as of 2025)
• Is registered with the Environment Agency (in England)
• Must be renewed annually
• Generates a unique registration number (premises code) that must appear on all consignment notes issued from that premises

The 500 kg threshold should not be treated as a practical exemption from monitoring. Businesses below the threshold still produce hazardous waste and must still manage it under the consignment note system, they simply do not need to register their premises. It is good practice for smaller producers to monitor their hazardous waste output against the threshold and register promptly if they approach it.

The EA publishes a public register of hazardous waste producers, which anyone can search to verify whether a premises is registered. Consignees (receiving facilities) are entitled to check whether the premises appearing on a consignment note is registered where the quantities involved suggest registration should be required.

Common Hazardous Wastes Businesses Encounter

Many businesses produce hazardous waste without realising it, because common items that seem mundane carry hazardous classifications. The following are among the most frequently encountered hazardous wastes in business settings:

• Fluorescent tubes and compact fluorescent lamps (EWC 20 01 21*), contain mercury, a toxic heavy metal. Cannot be placed in general skip waste or general waste bins. Must be collected by an authorised hazardous waste carrier and taken to appropriate disposal.
• Batteries, lead-acid (EWC 20 01 33*), car batteries, forklift batteries, uninterruptible power supply batteries. Lead-acid batteries are acutely hazardous (lead content, sulphuric acid electrolyte). Lithium batteries (also 20 01 33* in many classifications) present fire risk.
• Waste oil (EWC 13 02 05* or 13 02 06*), engine oil, hydraulic oil, gear oil from machinery maintenance. Mineral oil is hazardous; synthetic and biologically degradable oils may have mirror entry classifications.
• Paint and varnish containing organic solvents (EWC 08 01 11*), oil-based paints, solvent-based lacquers, and varnishes are hazardous. Water-based paints are generally non-hazardous (EWC 08 01 12).
• Solvents (EWC 14 06 01* etc.), cleaning solvents, degreasers, and thinners are typically hazardous due to HP3 (flammability) and HP6 (acute toxicity) properties.
• Asbestos-containing materials (EWC 17 06 05*), any material containing asbestos in any concentration is hazardous waste.
• Contaminated soil (EWC 17 05 03*), excavated soil from sites with historical industrial contamination.
• Fluorinated refrigerants and gases (EWC 16 05 04*), refrigerant gases from air conditioning and refrigeration equipment. Removal of refrigerants must be carried out by F-Gas certified engineers under the Fluorinated Greenhouse Gas Regulations.
• Electrical and electronic equipment containing hazardous components (EWC 20 01 35*), older electrical equipment containing PCBs, mercury switches, or cathode ray tubes.

Businesses should audit their waste streams against this list annually. Many common compliance failures arise from businesses disposing of fluorescent tubes, batteries, and waste oil through general commercial waste collections, thereby misclassifying hazardous waste as non-hazardous and using a standard WTN rather than a consignment note.

Scotland: The Special Waste Regime

Scotland operates a distinct but broadly parallel regime for hazardous waste, known as the "special waste" regime. The governing legislation in Scotland is the Special Waste Regulations 1996 (SI 1996/972), as amended by the Special Waste Amendment (Scotland) Regulations 2004 (SSI 2004/112) and subsequent instruments.

The special waste regime in Scotland is administered by the Scottish Environment Protection Agency (SEPA), which fulfils the equivalent role to the EA in England. The substantive definition of special waste aligns broadly with the England/Wales hazardous waste definition, both derive from the same European legislative origins, but there are procedural differences.

Key features of the Scottish special waste regime:

• Pre-notification: Most movements of special waste in Scotland require pre-notification to SEPA before the movement takes place. SEPA issues a consignment note reference number in response to the notification. The timing requirements for pre-notification are specified in the Special Waste Regulations 1996.
• Consignment note format: Scottish special waste consignment notes use SEPA's format, which differs from the England/Wales format. Businesses operating across the border must use the correct form for each jurisdiction.
• Three-year retention: As with England/Wales, consignment notes must be retained for three years by all parties.
• SEPA register: SEPA maintains a public register of consignee sites and carriers authorised to handle special waste in Scotland.

Businesses that operate in both Scotland and England/Wales must manage two separate regulatory regimes for their hazardous/special waste. This is particularly relevant for construction and demolition contractors, waste carriers operating nationally, and businesses with premises in both jurisdictions.

For broader guidance on the distinction between controlled waste, hazardous waste, and special waste, including what falls outside the standard WTN regime entirely, see our article on controlled waste versus special waste.