AZ SB1340

Amends multiple Arizona environmental statutes to require state standards, rules, and permits to be "at least as stringent as" corresponding federal law, replacing previous language stating standards should be "no more stringent than" federal requirements.

Changes the Department of Environmental Quality's authority across air quality, water quality, hazardous waste, solid waste, and underground storage tank programs to align state rules with federal minimums rather than impose lower standards than federal law.

Modifies language in sections addressing air quality conformity, hazardous air pollutants, pretreatment programs, sewage sludge management, and permit requirements to standardize the stringency requirement to match federal law.

Affects rules and standards for pollution control programs including the Arizona Pollutant Discharge Elimination System (AZPDES), aquifer protection, storm water management, and hazardous substance underground storage tank systems.

Makes conforming changes to grammatical language throughout (e.g., changing "per cent" to "percent," "which" to "that") while maintaining the substantive shift toward enforcing environmental protections at least as strict as federal standards.