Regulatory research

Cited answers from federal and state air law.

Ask about a rule and get an answer from the source text. Coverage includes federal 40 CFR, EPA guidance, EAB decisions, EPA emission factors, and New Mexico, Utah, Texas, Colorado, Albuquerque, and Bernalillo County programs. You do not need a project.

What you can ask

• What a rule requires by name or section, such as NSPS Subpart Dc or 40 CFR §63.7500
• Whether a rule applies to a given source, with the subpart cited
• A plain English summary of an NSPS or NESHAP subpart
• The right EPA emission factor or Part 60 reference method
• Texas Effects Screening Levels (ESLs) for air toxics

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