The U.S. EPA on June 18 released data showing nearly 1.75 billion renewable identification numbers (RINs) were generated under the Renewable Fuel Standard in May, down from 2.07 billion that were generated during the same period of last year. Total RIN generation for the first five months of 2025 reached 9.06 billion, down from 10.04 billion generated during the same period of 2024.

Nearly 8.19 billion D3 cellulosic RINs were generated in May, including 3.93 million generated for cellulosic ethanol by domestic producers, 1.52 million generated for renewable natural gas (RNG) by domestic producers, and 3,415 generated for compressed RNG by domestic producers. 

Total D3 RIN generation for the first five months of the year reached 379.09 million. That volume includes 326.25 million generated for RNG by domestic producers, 35.95 million generated for cellulosic ethanol by domestic producers,14.83 million generated for RNG by importers, and 2.06 million generated for compressed RNG by domestic producers. 

Nearly 507.97 million D4 biomass-based diesel RINs were generated in May, including 319.22 million generated for nonester renewable diesel by domestic producers, 143.27 million generated for biodiesel by domestic producers, 26.39 million generated for renewable jet fuel by domestic producers, 9.06 million generated for renewable jet fuel by foreign entities, 8.44 million generated for nonester renewable diesel by foreign entities, and 1.58 million generated for biodiesel by importers. 

Total D4 RIN generation for the first five months of 2025 reached 2.61 billion. That volume includes 1.76 billion generated for nonester renewable diesel by domestic producers, 646.85 million generated for biodiesel by domestic producers, 92.75 million generated for renewable jet fuel by domestic producers, 36.9 million generated for renewable jet fuel by foreign entities, 27.56 million generated for nonester renewable diesel by foreign entities, 23.8 million generated for biodiesel by importers, and 21.55 million generated for nonester renewable diesel by importers. 

Approximately 16.66 million D5 advanced biofuel RINs were generated in May, including 10.39 million generated for naphtha by domestic producers, 5.42 million generated for ethanol by domestic producers, 526,502 generated for renewable heating oil by domestic producers, 223,725 generated for nonester renewable diesel by domestic producers, and 98,841 generated for LPG by domestic producers. 

Total D5 RIN generation for the first five months of the year reached 113.72 million. That volume includes 59.1 million generated for naphtha by domestic producers, 35.6 million generated for nonester renewable diesel by domestic producers, 17.28 million generated for ethanol by domestic producers, 1.32 million generated for renewable heating oil by domestic producers, 164,664 generated for LPG by domestic producers, 163,326 generated for compressed RNG by domestic producers, and 91,735 generated for RNG by domestic producers. 

Nearly 1.22 billion D6 renewable fuel RINs were generated in May, including 1.21 billion generated for ethanol by domestic producers and 1.13 million generated for ethanol by importers. 

Total D6 RIN generation for the first five months of 2025 reached 5.96 billion. That volume includes 5.95 billion generated for ethanol by domestic producers, 5.25 million generated for ethanol by importers, and 153,911 generated for biodiesel by domestic producers. 

According to EPA, 22,401 D7 cellulosic diesel RINs were generated in May, all for cellulosic heating oil by importers. A total of 129,140 D7 RINs were generated during the first five months of the year, all for cellulosic heating oil by importers.