SB 817 tightens air quality regulations for concrete plants and crushing facilities. It prohibits new construction of these facilities within 880 yards of residences, workplaces, schools, parks, or places of worship. The bill mandates stricter pollution control measures for facilities seeking standard permits, including requirements for filters, dust suppression, and emission limits. Existing facilities with valid permits as of September 1, 2025, are exempt from certain new restrictions. The act applies to permits or amendments filed on or after its effective date​.