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NOx Accountability

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NOx Accountability

This is the first phase (i.e. initiative) of a potentially multi-phase project aimed at identifying scientific methodology that will lead to the development of innovative analytical tools supporting the analysis of control strategy effectiveness, namely accountability. Significant reductions in NOx emissions from stationary sources have occurred in the Eastern US and additional reductions are anticipated in the future. These emission reductions have been required to reduce the tropospheric ozone levels based primarily on computer modeling. The NOx RACT rule (NE OTR), CAAA Title IV, NOx SIP call, and the Section 126 rule all require NOx emission reductions throughout the Eastern US from major sources. In addition, significant future reductions are expected from mobile sources, diesel engine rules, the Clean Air Interstate Rule, and the importance of ensuring the protection of human health. Given the significant costs for these emission control measures, it is important to demonstrate the effectiveness of these rules through analysis of modeling outputs and observations and track our progress in improving air quality.

NOx Accountability

Accountability Indicators for Air Quality (PDF, 12 pp, 314KB)About PDF

Analysis of Air Quality Monitoring Results for N-Species

Statistical Modeling & Analyses Plans


Atmospheric Modeling

Research & Development | National Exposure Research Laboratory

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