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The document covers biennial reporting for CY 2024–2025, compares Roadside Emissions Survey Program and Smog Check program vehicle failure rates, estimates potential additional emission reductions, and includes an independent review by U.C. Riverside CE-CERT. 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The U.S. EPA report is required under the federal Clean Air Act and 40 CFR Part 51, Subpart S, section 51.366.","Answer",{"name":116,"@type":111,"acceptedAnswer":117},"What major comparisons and analyses are included in the 2024–2025 reporting?",{"text":118,"@type":114},"The report compares vehicle failure rates between the Roadside Emissions Survey Program and the Smog Check Program. It also provides an estimate of potential additional emission reductions and includes an independent review by U.C. Riverside CE-CERT.",{"name":120,"@type":111,"acceptedAnswer":121},"What does the document say about failure-rate relationships with station performance and program indicators?",{"text":122,"@type":114},"Vehicles certified by high-performing stations fail at a lower roadside rate than those certified by low-performing stations. Higher Follow-up Pass Rate (FPR) correlates with lower roadside failure rates, and STAR stations show lower failure rates than non-STAR stations.","https://schema.org",{"og:url":83,"og:type":125,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":127,"canonical":83},"index,follow",{"doc_id":129,"site_id":62},269343,1789450518,{"code":4,"msg":5,"data":132},{"doc_id":129,"user_id":133,"nickname":92,"user_avatar":134,"doc_module":4,"category_id":39,"category_name":40,"doc_title":65,"doc_description":67,"doc_content":135,"file_id":136,"file_url":137,"file_type":138,"file_size":139,"view_count":105,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":140,"language":141,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":142,"faqs":143,"seo_title":144,"seo_description":67,"update_tm":130,"read_time":145,"preview_page_count":4},962075114765,"https://ap-avatar.wpscdn.com/davatar_a8503ba1806abce46bf441b54a3ca4cd","2026 Smog Check Performance Report and United States Environmental Protection Agency Report  \nJonathan Gee  \nBAR Engineering and Research Branch July 30, 2026  \n Bureau of Automotive Repair  \nReporting requirements (1 of 2)  \n• The Smog Check Performance Report (SCPR) is required by California Health and Safety Code section 44024.5(b) .  \no Meets the biennial reporting requirement for data collected during CY 2024 and 2025  \no Includes an analysis of Roadside Emissions Survey Program vs. Smog Check Program vehicle failure rates  \no Provides an estimate of potential additional emission reductions  \no Includes an independent review by U.C. Riverside Center for Environmental Research and Technology (CE-CERT)  \nReporting requirements (2 of 2)  \n• The United States Environmental Protection Agency (US EPA) Report is required by the federal Clean Air Act and section  \n51.366 of the Code of Federal Regulations (40 CFR Part 51, Subpart S) .  \n1990 finding and recommendations  \n• Finding  \no “ …many of the vehicles that initially failed during the previous Smog Check cycle were not actually repaired or were repaired only temporarily.”  \n• Recommendations  \no Refine station performance algorithms for increased enforcement  \no Incentivize high station performance  \no Perform confirmatory testing immediately following certification through either roadside or on-site testing  \no Continue roadside inspections to audit Smog Check and target low performing stations  \nFailure rates by vehicle age  \nRoadside  \nSmog Check  \n5  \n2026 Smog Check Performance Report findings  \n• The 2024-25 roadside failure rate was 14%, which is comparable to the 2024 SCPR.  \n• Vehicles certified by “high performing” Smog Check stations failed at a lower rate at roadside compared to “low performing”stations.  \n• Incremental improvements to the program are evidenced by:  \no Declining overall failure rate  \no Narrowing difference between roadside and Smog Check failure rates  \no Increased enforcement actions against stations and technicians engaging in fraudulent practices 6  \nCurrent and historic failure rates  \nRoadside failure by station performance  \n8  \nBAR enforcement activities  \n• From 2016 to 2025, BAR filed 1,534 “data-only” cases with the Attorney General’s Office, resulting in 1,336 license revocations and 397 suspensions or probations.  \n• BAR continued administrative disciplinary action against stations suspected of clean-piping, clean-gassing, clean-plugging and clean-tanking.  \n• BAR continued work with the Department of Motor Vehicles  \n(DMV) to significantly curtail registration-based fraud.  \nIndications of program performance  \n• Vehicles certified by stations with subsequently revoked licenses failed at consistently higher rates at roadside compared to those certified by stations in good standing.  \n• Vehicles certified by stations with a higher Follow-up Pass Rate (FPR) failed at a lower rate at roadside compared to those with a lower FPR.  \n• Vehicles certified by STAR stations failed at a lower rate at roadside compared to those certified at non-STAR stations.","cbCaidUxqT1d2Osv","https://ap.wps.com/l/cbCaidUxqT1d2Osv","pdf",543841,21,"English","# Reporting requirements (1 of 2)\n## Reporting requirements (2 of 2)\n# 1990 finding and recommendations\n## Finding\n## Recommendations\n# Failure rates by vehicle age\n# 2026 Smog Check Performance Report findings\n## Current and historic failure rates\n## Roadside failure by station performance\n# BAR enforcement activities\n# Indications of program performance","[{\"question\":\"What reporting requirements does the document address for the SCPR and the EPA report?\",\"answer\":\"The SCPR is required under California Health and Safety Code section 44024.5(b) with biennial reporting for CY 2024 and 2025. The U.S. EPA report is required under the federal Clean Air Act and 40 CFR Part 51, Subpart S, section 51.366.\"},{\"question\":\"What major comparisons and analyses are included in the 2024–2025 reporting?\",\"answer\":\"The report compares vehicle failure rates between the Roadside Emissions Survey Program and the Smog Check Program. It also provides an estimate of potential additional emission reductions and includes an independent review by U.C. Riverside CE-CERT.\"},{\"question\":\"What does the document say about failure-rate relationships with station performance and program indicators?\",\"answer\":\"Vehicles certified by high-performing stations fail at a lower roadside rate than those certified by low-performing stations. Higher Follow-up Pass Rate (FPR) correlates with lower roadside failure rates, and STAR stations show lower failure rates than non-STAR stations.\"}]","2026 Smog Check Performance Report - SCPR Findings and Reporting Requirements | PDF",53]