Environmental regulator opens market engagement on NO2 and rainfall monitoring
Forthcoming procurement will establish a nationwide network to monitor rainfall and nitrogen dioxide, creating new opportunities for monitoring and analysis services.
Forthcoming procurement will establish a nationwide network to monitor rainfall and nitrogen dioxide, creating new opportunities for monitoring and analysis services.
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The Environment Agency has signalled a significant upgrade to how it tracks pollutants in the atmosphere. Its Precipitation and NO2 Monitoring Network project, announced in a Prior Information Notice on 3rd March 2026, sets out plans for a UK-wide system that will measure precipitation and nitrogen dioxide using a range of sampling and analytical approaches, providing data for environmental compliance and long‑term trend analysis.
According to the notice, the project involves establishing “a network to monitor precipitation and nitrogen dioxide levels across the UK”. It points to the use of “various sampling methods and analysis techniques”, suggesting a coordinated system rather than a single monitoring site or technology.
By bringing precipitation and nitrogen dioxide into the same monitoring framework, the agency aims to build a consistent evidence base. The focus on a network across the country indicates an ambition to capture conditions in multiple locations and to compare results over time.
The publication as a Prior Information Notice means this is an early signal to the market rather than a full contract notice. Technical specifications, delivery models and commercial terms are not yet set out, leaving space for the agency to refine its requirements before moving to a full tender.
The notice highlights two main purposes for the new network: supporting environmental compliance and enabling trend analysis. Both depend on reliable, repeatable measurements delivered in a consistent way across the monitoring estate.
In practice, this points to a system that can:
The reference to “various sampling methods and analysis techniques” implies that the Environment Agency expects contributions from organisations able to design and operate field sampling, provide robust analytical services and support the interpretation of results. Trend analysis, in particular, relies on well‑managed data and clear reporting back to regulators.
What is not yet defined is the scale of the network, the balance between different types of sampling and analysis, or the precise performance standards that equipment and methods will need to meet. These details are likely to emerge as the agency refines its requirements ahead of a full tender.
The move comes amid a broader wave of investment in air quality monitoring. On 20th February 2026, Newry, Mourne and Down District Council issued a contract for a new particulate matter analyser at its air quality station in Newry. The Particulate Matter Analyser Procurement covers the supply, installation, commissioning and maintenance of equipment for measuring PM10 and PM2.5 at a single site, underlining how local authorities are upgrading individual stations.
At national scale, a notice on 6th January 2026 from the Education Procurement Service set out plans for up to thirty‑two analysers for a National ambient air monitoring network. That Automatic Particulate Matter Monitoring framework combines supply, delivery, installation, servicing and maintenance, and is explicitly designed to comply with CAFE Directive requirements. Together with the Environment Agency’s new network, it points to a growing emphasis on consistent, high‑quality data across national monitoring systems.
Elsewhere in Europe, public bodies are also expanding their capabilities. On 11th February 2026, the Institut Scientifique de Service Public launched an Air Quality Analyzers Supply contract for Wallonia, covering ozone, nitrogen oxides and particulate matter, along with training and after‑sales service. In September 2025, the Ministry for Environment, Nature Conservation and Transport in North Rhine‑Westphalia issued an Air Quality Measurements tender spanning ammonia, ultrafine particles, nitrogen oxides, ship emissions and ozone precursor substances, divided into three lots.
Network resilience and infrastructure are also in focus. On 26th December 2025, the Consejería de Agricultura, Ganadería y Desarrollo Sostenible launched an Air Quality Monitoring Equipment Upgrade project in Extremadura, combining new measurement equipment, renovated weather shelters and an uninterrupted power supply system. The aim is to strengthen the reliability of an existing monitoring network.
The techniques used to capture air pollutants are evolving as well. In October 2025, the Dutch National Institute for Public Health and the Environment began a Market Consultation for Ammonia Samplers, seeking passive samplers and analysis in nature areas, with a strong focus on technical specifications, laboratory accreditation and continuity of data. Earlier, on 9th October 2025, United Utilities Water Limited issued a Prior Information Notice for Odour Control Unit Sampling Services, covering routine sampling and testing of odour control units using MCERTS‑accredited methods.
There is also growing interest in using monitoring data to track environmental recovery. On 3rd October 2025, JNCC Support Co went to market for Air Pollution Recovery Indicators at Skipwith Common SAC, combining air quality, vegetation and soil monitoring to assess ecological recovery following the closure of nearby coal‑fired power stations.
The Environment Agency’s plans sit alongside a series of procurements that link atmospheric monitoring with water, soil and ecosystems. On 5th November 2025, Severn Trent Water Limited issued a Prior Information Notice for PFAS Catchment Investigations, covering surface water quality, targeted sampling, forensic analysis and mitigation strategies. On 19th February 2026, the Syndicat Mixte de Production et Distribution d'Eau Potable de la Région de Caen sought services for Nitrogen Dynamics Monitoring on priority and sensitive catchment areas, using statistical treatments and campaigns to understand nitrogen behaviour.
Water utilities are strengthening their laboratory capacity in parallel. On 2nd February 2026, Scottish Water advertised the Nutrient Analysers Supply contract for two laboratory instruments, including servicing and consumables, to support compliance with water quality regulations. In December 2025, the Agency for Nature Conservation and Landscape Protection of the Czech Republic launched an Aquatic Environment Monitoring contract to collect data on the quality of aquatic environments at selected sites through annual sampling of physical‑chemical parameters and biological components from 2026 to 2028.
Monitoring network design is also a live issue for nature conservation bodies. On 31st October 2025, Natural England advertised a requirement for Hydrological Monitoring Network Development at North Solent NNR, seeking a conceptual hydrological model and recommendations for dipwell locations linked to permanent vegetation plots. On 20th February 2026, the Správa Tatranského národného parku issued a contract for Wet Ecosystem Monitoring Systems, including a meteorological station and systems for monitoring transpiration flow and trunk growth on trees.
Further upstream in the monitoring chain, instrumentation and sampling infrastructure are being renewed. On 24th September 2025, the Český hydrometeorologický ústav tendered for Sample Collectors for Water Monitoring, supplying stationary and mobile automatic sample collectors for suspended solids in surface water, funded by the European Union. A month later, on 15th October 2025, Styrelsen for Grøn Arealomlægning og Vandmiljø sought Chemical Laboratory Analyses of nutrients in freshwater, groundwater, soil and drain water, with the supplier responsible for packaging, collection, transport, analysis and reporting.
Across these projects, a common thread is the move towards integrated, long‑term environmental datasets built from networks of sampling points, analytical capacity and structured reporting. The Environment Agency’s planned precipitation and nitrogen dioxide monitoring network fits squarely within this trend, extending coverage of key atmospheric variables alongside existing air and water quality systems.
For suppliers, the Prior Information Notice signals that a new opportunity is emerging in the UK market for organisations able to combine sampling, analysis and data interpretation at scale. Any subsequent full tender will define the technical and commercial framework. Until then, potential bidders will be watching closely for how the agency chooses to structure its network, what range of sampling methods it ultimately specifies, and how it intends to turn raw measurements into the compliance and trend data that regulators require.
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