NCore is a multi pollutant network that integrates several advanced measurement systems for particles, pollutant gases and meteorology. Most NCore stations have been operating since the formal start of the network on January 1, 2011.  The requirements for NCore monitoring can be found in 40 CFR part 58 Appendix D.The NCore Network addresses the following objectives:Timely reporting of data to...

The U.S. air quality trends summaries are intended to reflect actual air quality and therefore include concentrations that may have been impacted by episodic events like wildfires and dust storms.  Air Quality Design Values are used to designate and classify nonattainment areas and intended to reflect air quality that is not impacted by exceptional events. Therefore if concentrations are show...

REal TIme Geospatial Data Viewer (RETIGO) is a free, web-based tool that can be used to explore environmental data that you have collected either stationary or in motion (e.g., air quality sensors added to a bike).RETIGO allows you to add data from nearby air quality and meteorological stations.RETIGO can be used by anyone to explore data that they collected, but it does not move the data from the...

openair is an R package developed for the purpose of analysing air quality data — or more generally atmospheric composition data. The package is extensively used in academia, the public and private sectors. The project was initially funded by the UK Natural Environment Research Council (NERC), with additional funds from the UK Department for Environment Food & Rural Affairs (Defra)....

A number of diffusive samplers that are used for longer-term monitoring of nitrogen dioxide in the European Union were subjected to a review of their use and performance characteristics. The information collected was used to evaluate the capacity of diffusive samplers for monitoring the European Union annual limit value of 40 µg.m-3 and to draft a proposal method for monitoring nitrogen dioxide in...

One of the main challenges for GAW is to balance the needs of global-scale issues, with regional and urban concerns. Another major challenge is how to accomplish the desires to expand GAW monitoring activities to include measurements for each principal climatic zone and each major biome (some 30 global stations), and to add important species to the measurement list at GAW stations (e.g., NMHCs, ae...

In response to the rapid rise of greenhouse gas (GHG) concentrations in the atmosphere and the resulting negative impacts, nations, states, cities, private enterprises and individuals are accelerating GHG emission reduction efforts while meeting the needs of global economic development and equity. The urgency, complexity and economic implications of GHG emission reductions demand strategic investm...

Over the past decade, there has been exponential growth in low-cost air pollution sensing technology. While low-cost sensors can provide a path towards more accessible air quality measurement, there are several guidelines that should be considered prior to deploying a low-cost sensor network. In this tutorial guide, we focus on low-cost aerosol sensors (in this case, PM2.5). The tutorial reviews k...

Low-cost sensors for particulate matter mass (PM) enable spatially dense, high temporal resolution measurements of air quality that traditional reference monitoring cannot. Low-cost PM sensors are especially beneficial in low and middle-income countries where few, if any, reference grade measurements exist and in areas where the concentration fields of air pollutants have significant spatial gradi...

Technical support document on the use of reference and non-reference methods, and on the quality assurance process to meet relevant data quality objectives for regulated air pollutants : final versionThis document provides technical details and support for the implementation of air quality monitoring under the Directive (EU) 2024/2881 of the European Parliament and of the Council of 23 October 202...