In response to a request from several participating entities, the California ISO has posted a “Historical Resource Adequacy Aggregated Data” report.

The report provides data from 2019 - 2023 broken into the following groups:

1. Aggregated historic September year ahead RA showings and Month Ahead (May - Oct) RA Showings from 2019 to 2023 broken down between imports and internal generation.
2. Aggregated historic September year ahead RA showings and Month Ahead (May - Oct) RA Showings from 2019 to 2023 broken down by fuel type.
3. The total system obligation vs total September year ahead RA showings and Month Ahead (May - Oct) RA Showings from 2019 to 2023.

The report is available on the Reliability Requirements webpage, under the Wheeling and resource adequacy imports aggregate data heading.