Texas Air Quality Rules

Links to the various air quality control measures by affected area.

This page lists the most recent air quality improvement measures in effect in Texas. Strategies that have recently been withdrawn are also shown. Click on each control strategy for more details (description, full text of complete rule, recent adoptions, agreements, etc).

Mobile Source—sources include both on- and off-road vehicles.
Area Source
Point Source
Chapter 115 and 117 Guidance and Methods
Conformity
Withdrawn/Repealed Strategies

Control Measures	Area
Mobile Source	HGB	DFW	BPA	ELP	NETX	ARR	SAN	CC	VIC	Others
Locally Enforced Vehicle Idling		X				X
Vehicle Inspection and Maintenance (I/M)	X	X		X		X
Texas Emission Reduction Plan (TERP)	X	X	X	X	X	X	X	X	X
Texas Low Emission Diesel (TxLED)	X	X	X		X	X	X	X	X	X
Low Reid Vapor Pressure (RVP) Gasoline				X	X	X	X	X	X	X
Reformulated Gasoline (RFG)	X	X
Voluntary Mobile Emissions Reduction Program (VMEP)	X	X
Transportation Control Measures (TCM)	X	X
Texas Clean Fleet (TCF) Program	X	X		X						X
Speed Limit Reduction	X	X
Large Non-Road Spark-Ignition Engine Standards	X	X	X	X	X	X	X	X	X	X
California NTE Heavy-Duty Diesel Engine Emission Standards	X	X	X	X	X	X	X	X	X	X
Vehicle Anti-tampering Restrictions	X	X	X	X	X	X	X	X	X	X
Area Source	HGB	DFW	BPA	ELP	NETX	ARR	SAN	CC	VIC	Others
Stage I/II Vapor Recovery	X	X	X	X		X	X			X
Water Heaters, Small Boilers, and Process Heaters	X	X	X	X	X	X	X	X	X	X
Controlling Emissions at Minor Sources	X	X
Point Source	HGB	DFW	BPA	ELP	NETX	ARR	SAN	CC	VIC	Others
Highly Reactive Volatile Organic Compounds (HRVOCs)	X
Utility Electric Generation in Ozone Nonattainment Areas	X	X	X
Utility Electric Generation in East and Central Texas										X
Industrial, Commercial, and Institutional Combustion Sources in O₃ NAAs	X	X	X
Cement Kilns		X				X	X			X
Adipic Acid Manufacturing	X		X
Nitric Acid Manufacturing in Ozone Nonattainment Areas	X		X
Nitric Acid Manufacturing (General)	X	X	X	X	X	X	X	X	X	X
Mass Emissions Cap and Trade (MECT)	X
Voluntary Energy Efficiency/Renewable Energy	X	X	X	X	X	X	X	X	X	X
Guidance and Methods	HGB	DFW	BPA	ELP	NETX	ARR	SAN	CC	VIC	Others
Chapter 115 VOC Guidance and Methods
Chapter 117 NOx Guidance and Methods
Conformity	HGB	DFW	BPA	ELP	NETX	ARR	SAN	CC	VIC	Others
Transportation Conformity	X	X	X	X
General Conformity	X	X	X	X
Withdrawn/Repealed Strategies	HGB	DFW	BPA	ELP	NETX	ARR	SAN	CC	VIC	Others
Commercial Lawn Equipment Operating Restriction	X
HGB Vehicle Idling Restriction	X
Construction Equipment Operating Restrictions (Repealed)	X
Accelerated Purchase of Cleaner (Tier 2/3) Off-road Equipment	X
Airport Ground Support Equipment (GSE) Replacement	X	X
Residential and Commercial Air Conditioners	X
Diesel Emulsion	X
California Low-Emission Vehicles (CalLEV)	X	X	X	X	X	X	X	X	X	X

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