Source: https://tendernation.io/opportunities/01a13bb3-6d2e-736d-8622-51bd31864d00/the-uk-urban-no2-network-uunn-2024 awarded GB open procedure # The UK Urban NO2 Network (UUNN) 2024 [ENVIRONMENT AGENCY (Defra Network eTendering Portal)](https://tendernation.io/buyers/environment-agency-defra-network-etendering-portal) Estimated value £0 Published 12 Feb 2025 Deadline Closed 20 Nov 2024 ## Who can bid - Small contract value Valued under £135,018 including VAT, the lowest Procurement Act threshold for goods and services. - Open procedure Anyone can submit a full tender; there is no shortlisting stage. ## About this tender The UUNN was first established in January 2020 and has expanded since to respond to evidence needs and is currently operating at ~299 sites.The primary aim of the UUNN is the provision of additional NO2 monitoring data for inclusion within the national UK compliance assessment. Previously the national assessment of NO2 has comprised of a UK-wide automatic monitoring network; the Automatic Urban and Rural Network (AURN), and national scale modelling; the Pollution Climate Mapping (PCM) model.UUNN monitors were sited specifically to target areas where modelling had indicated an exceedance of the annual mean NO2 limit value, and where concentrations predicted by the PCM model and by local modelling completed by a relevant local authority were not in good agreement.The two requirements to identify specific road links for UUNN measurements within these areas were originally as follows:▪ Where the PCM model and/or modelling completed by a relevant local authority had predicted an exceedance of the NO2 annual mean limit value of 40µg/m3 in 2020 and/or 2021.▪ Where the difference between the PCM model and modelling completed by a relevant local authority is larger than 20%.The Network continues to evolve, and now the aims are move generalised benefits rather than the original aims, although the limit of annual mean exceedance of 40µg/m3 is still a key reporting marker. ## CPV classification Air quality management Source Find a Tender (UK) · Notice ocds-h6vhtk-04b0af-2025-02-12T15:10:59Z [View official notice](https://www.find-tender.service.gov.uk/Notice/ocds-h6vhtk-04b0af-2025-02-12T15:10:59Z) Never miss a tender like this again Get AI summaries, deadline alerts and a bid pipeline for tenders matched to your business. 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