US Environmental Protection Agency
4 Mar 2021 Deterioration factor for L-vehicle pollution control device durability (US EPA) DUR-13-02/Rev.1 2021-03-04 US EPA
23 Apr 2021 Proposal: Minimum Accumulated Distance for 3-Wheeled Vehicles (US EPA) DUR-14-02 2021-04-23 US EPA
27 Apr 2021 L-vehicle pollution control: Statistical analysis of deterioration factor data (US EPA) DUR-14-06 2021-04-27 US EPA
30 Jun 2021 Input on deterioration factor methodologies in US emissions regulations (US EPA) DUR-16-03 2021-06-30 US EPA
30 Jun 2021 Deterioration factors across regulatory agencies: Revision of column on US methods (US EPA) DUR-16-04 2021-06-30 US EPA
30 Jun 2021 Deterioration factors across regulatory agencies: Revision of US column (US EPA) DUR-16-05 2021-06-30 US EPA
21 Jul 2021 Deterioration Factor Requirements for On-Highway Motorcycles (two and three wheelers) (US EPA) DUR-17-04 2021-07-21 US EPA
21 Jul 2021 L-vehicle Pollution Control Durability: Minimum Distance Accumulation and Mathematical Deterioration Factor (US EPA) DUR-17-05 2021-07-21 US EPA
23 Aug 2021 L-category pollution controls durability GTR: Proposal to include paragraphs on multiplicative deterioration factor values in the Technical Report (US EPA) DUR-18-01 2021-08-23 US EPA
23 Apr 2021 Statistical analysis of motorcycle emissions deterioration factor data (CARB and US EPA) EPPR-44-06 2021-04-23 CARB US EPA
15 Dec 2022 Motorcycle Emissions Deterioration Factor Statistical Analysis (CARB and US EPA) EPPR-56-04 2022-12-15 CARB US EPA
10 Jan 2025 Assigned Deterioration Factor Analyses from US EPA Motorcycle Certification Information (US EPA) EPPR-65-05 2025-01-10 US EPA