Nitrogen Oxides Politics Pollution Control 
Legal Planet
AUGUST 22, 2023
States and local air quality regulators have the legal authority to set particulate matter (PM), ozone, and nitrogen oxides (NOx) emissions standards and adopt regulations for these pollutants when they are already in attainment of the national ambient air quality standards ( NAAQS ) set by the U.S.
Environment, Law, and History
AUGUST 27, 2023
Dan Farber at Legal Planet recently posted on "Cars, Smog, and EPA" An excerpt: For the first 20 years of federal regulation, Congress set the NOx [nitrogen oxides] standards for new cars itself. That’s quite different from the standards for industrial pollution sources, which Congress has always delegated to EPA.
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Legal Planet
APRIL 24, 2025
Only the San Joaquin Valley Air Pollution Control District and the South Coast Air Quality Management District, out of Californias 35 local air districts, have adopted ISRs, despite the pervasiveness of air pollutants like nitrogen oxides (NOx) and particulate matter (PM10 and PM2.5).
Legal Planet
APRIL 10, 2025
The South Coast Air Quality Management District is weighing new WEAKENED rules to reduce emissions of nitrogen oxides , or NOx, the smog-forming byproducts of combustion, by limiting the sale of home gas-fired furnaces and water heaters. Subject of a public hearing yesterday, stay tuned to the outcome.
Union of Concerned Scientists
JUNE 14, 2023
It asserts that for matters of vast economic or political significance, a federal agency must point to explicit congressional authorization. It sets a framework for states and utilities across the country to fully reckon with their power plants’ carbon emissions. billion to $5.9 billion.
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