Pollution inventory reporting

The pollution inventory provides information about releases and transfers of substances from regulated industrial activities.

The pollution inventory includes reporting on annual emissions of certain substances to air, controlled waters and land, and off-site transfers in wastewater and waste.

You must report to the pollution inventory if you:

  • operate under a Part A (1) Environmental Permit and have received a notice under Regulation 60 of the Environmental Permitting Regulations 2010
  • operate a sewage treatment works with a capacity at, or over, 100,000 population equivalents (PE)
  • dispose of radioactive waste to air, water or sewers covered by a permit issued under the Environmental Permitting Regulations 2010
  • run an opencast mine or quarry with a surface area over 25 hectares, or an underground mine and related operation (no capacity threshold)

Returns must be submitted by 28 February of each reporting year. You can use the Environment Agency’s online reporting system, or complete and return a paper reporting form.

Resource efficiency

Operators are no longer required to report resource efficiency data as part of their pollution inventory return. If you do submit data, it will not be used for any purpose.

For some sectors, there may be a specific benefit in continuing to collect resource efficiency information. Where this is the case, the Environment Agency will work with the relevant operators or trade associations to explore other options for collecting this data, for example through trade association corporate and social responsibility reporting schemes.

Pollution inventory: guidance notes

General and sector specific guidance on how to carry out pollution inventory reporting and the information you need to provide.

Pollution inventory: submit electronic return

Use the Environment Agency’s online Pollution Inventory Electronic Data Capture (PIEDC) system to submit your data. The system will check your information for mistakes, automatically fill in standard fields and allow you to look at information you have provided in previous years.

The PIEDC online system opens for reporting on 1 January each year. The deadline for submitting your pollution inventory data is 28 February each year.

The PIEDC system opens in a pop-up window so make sure your pop-up blocker is switched off.

Access the PIEDC system.

If you think that some of the information you submit to the pollution inventory is confidential:

  • tick the box in Part 1 of PIEDC
  • provide justification text for your claim
  • tick the confidentiality box next to the appropriate lines of data
  • send any supporting documents to your site inspector

The Environment Agency will make a decision on your claim for confidentiality within 20 days from the date of your application, or within a longer period if agreed.

If you do not enclose a written justification for each item included in the confidentiality claim, they are likely to reject it immediately.

Pollution inventory: forms for paper returns

Forms to report pollution inventory data. Use these forms if you cannot use the online PIEDC system.

There is no charge for pollution inventory reporting.

Information submitted will be held on the pollution inventory, which is a public record of pollution levels in England.

Contact the Environment Agency if you have any questions:

Telephone: 03708 506 506 see call charges


Published 2 April 2014
Last updated 28 December 2017 + show all updates
  1. PIEDC system is unavailable from 8.30am until 5.30pm on 28 December 2017.
  2. PIEDC is unavailable from 18 to 20 December, and on 28 December 2017 while we do some important maintenance.
  3. PIEDC system available.
  4. The PIEDC system has been taken off-line for urgent maintenance Thursday 29 December 8:30am to 5:30pm.
  5. The PIEDC system is back online.
  6. The PIEDC system has been taken off-line for urgent maintenance from Monday 19 December 08:30 to Friday 23 December 17:30.
  7. Removed downtime notice and reinstated link to PIEDC system
  8. Please note that the PIEDC system has been taken offline today (Mon 21 Dec) for urgent maintenance. The system will be available for use outside of these times.
  9. Operators are no longer required to report resource efficiency data as part of their pollution inventory return.
  10. First published.