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Necessary

Always Enabled

Functional

Performance

Analytics

Analytical cookies are used to understand how visitors interact with the website. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc.

Cookie	Duration	Description
_ga	2 years	The _ga cookie, installed by Google Analytics, calculates visitor, session and campaign data and also keeps track of site usage for the site's analytics report. The cookie stores information anonymously and assigns a randomly generated number to recognize unique visitors.
_gat_UA-28909098-1	1 minute	A variation of the _gat cookie set by Google Analytics and Google Tag Manager to allow website owners to track visitor behaviour and measure site performance. The pattern element in the name contains the unique identity number of the account or website it relates to.
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_gid	1 day	Installed by Google Analytics, _gid cookie stores information on how visitors use a website, while also creating an analytics report of the website's performance. Some of the data that are collected include the number of visitors, their source, and the pages they visit anonymously.

Others

Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet.

Cookie	Duration	Description
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Annual Reporting

Reporting Guidance

COVID-19 Supplementary Guidance for LAQM Reporting in 2021

Report Templates

England (exc. London) Annual Status Report Templates

London Annual Status Report Templates

Northern Ireland Progress Report Templates

Scotland Annual Progress Report Templates

Wales Annual Progress Report Templates

Good Practice

Good Practice Examples: Annual Reports

Diffusion Tubes

Adding your Co-location Data

Annualisation of Diffusion Tubes

Diffusion Tube Data Processing Tool

Diffusion Tubes Overview

Local Bias Adjustment Factors

National Bias Adjustment Factors

NO₂ Diffusion Tube Monitoring Calendar

Practical Guidance: NO₂ Diffusion Tubes for LAQM

Precision and Accuracy

QA QC Framework

Automatic Monitoring

Volatile Correction Model

Frequently Asked Questions

FAQ 138 – Bias Adjusting Diffusion Tubes when Supplier/Method Changed

FAQ 139 – Short Term NO₂ to Calculate Annual Mean

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