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Classification of hazardous waste

HazWasteOnline™ is web-based software for classifying your waste as hazardous or non-hazardous based on its chemical composition and EU legislation. The software follows the latest technical guidance (UK or EU) and lets the user focus on what is in the waste and not how to do the calculations or keep up with the changing data.

HazWasteOnline™ provides waste producers, consultants, carriers and waste receivers with a simple, accurate and auditable tool for the classification of potentially hazardous waste materials, including contaminated soils, filter cakes, sludge residues and wastes from organic processes.

HazWasteOnline: Example of a classification report for a hazardous soil

Click here to download an example of a classification report for a contaminated soil.

Click here to check out the main features.


Although the waste producer has the legal responsibility to classify any waste they produce, most classifications in the UK are done by the waste receivers.

  • Incorrect classification can drastically increase disposal/transportion costs,
  • It can potentially breach legislation, and
  • Having a transparent and defensible audit trail reduces a company's risks.

HazWasteOnline™ contains all 20 EWC chapters and all 4500 plus substances from Table 3 of Annex VI of Regulation 1272/2008 on the Classification, labelling and packaging of substances and mixtures (CLP). The classifier can define their own templates for different waste streams and substancess such as those required for a filter cake, a sludge or soils at site X. Data for multiple samples can be imported via .hwol data files, entered manually or cut-n-pasted from spreadsheets.

Hazardous Waste Classification tool

HazWasteOnline™ is an on-line web tool that allows subscribers to:

  • Utilise a default waste stream template suitable for contaminated soils
  • Create customised waste stream templates with different substances, default species and EWC chapter
  • Add their own substances
  • Use the cut-n-paste function to quickly transfer laboratory results from spreadsheets
  • Classify one, ten or hundreds of samples at a time
  • Re-run the classification based on new information or assumptions
  • See which substances are causing the hazardous classification
  • Ignore a hazard property or substance (but document why)
  • Detailed PDF classification reports

HazWasteOnline™ allows users to code and classify waste as defined in the EWC (European Waste Catalogue 2002) based on EC Regulation 1272/2008 on the Classification, labelling and packaging of substances and mixtures (CLP) and latest Environment Agency guidance (WM3). The system comprises an analysis and reporting web front-end, a calculation engine to model the regulations and a database to save the contaminants inputted and reports generated. The system is fully auditable and is maintained by us to reflect the latest changes in EC regulations and Environment Agency guidance.


Watch our training videos to learn how to use HazWasteOnline™ to classify your waste streams.


17th - 18th September 2019   Warrington, GB

8th - 9th October 2019   Dublin, Ireland

6th - 7th November 2019   Reading, UK

Click here for more details and the Booking Form

Day 1: Hazardous Waste Classification

Day 1 covers the waste regulations, technical guidance (from UK and EU), waste classification using the chemical analysis and includes practical exercises and the use of HazWasteOnlinetm. The course explains hazard statements, the calculations, test suites and the selection of metal compounds. It also discusses other related topics including WAC and sampling methodology and explains any differences between the UK's WM3 and the EU's technical guidance.

Day 2: Advanced Waste Classification    

Day 2 builds on Day 1 and covers basic chemistry, physical properties, choice of both appropriate substances and species for metals, use of the C&L Inventory database and IARC Monographs for researching substances that are not in the CLP; it covers cases where some hazard properties can be excluded from a classification, recognising and dealing with incomplete CLP entries, the forensic assessment of hydrocarbons and PAH's, choice and meaning of different lab test suites and includes a number of practical exercises.

Attendees include waste producers, waste management companies, regulators and consultants.


To Date - Labs that offer ,hwol files

  • ALS - Hawarden
  • Chemtest
  • Dets - South
  • Element (Exova Jones) - Deeside
  • i2 Analytical

.hwol files can rapidly import solids data, liquids data and WAC data.

25th October 2018 - ATP 13 pulished

18 substances updated, 16 new substances added, and 1 removed

28th May 2018 - WM3 and EU 2018/C 123 classification engines released

Two new classification engines, one following the UK's WM3 technical guidance, the other the EU's technical guidance.

21st August 2017 - .hwol electronic data delivery file

We have released the new .hwol file format for the rapid importation of lab data. The new format is currently available from the following laboratories:

  • ALS
  • Chemtest
  • Exova Jones

It allows you to rapidly import your laboratory data straight into HazWasetOnline™ - it's quick and easy to use. Please contact support@onetouchdata.com if you want to know more or try the new format.

20th June 2017 - A new (experimental) WM3 HP14 engine released

Recently published Regulation (EU) 2017/997 defines a Europe-wide approach to the assessment of HP14 Ecotoxic using the H400 hazard statement codes. This change will come into force on the 5th July 2018. To help assess the potential impact of this change, we have published an experimental WM3 classification engine to help our customers assess the impacts.