Data sources
- U.S. Department of Energy — 2025 U.S. Energy & Employment Report (USEER). State-level clean-energy employment by sub-sector for calendar year 2024, released August 2025. We pull the public Excel workbook (sheet “state data”) and map each row to our 8-sector taxonomy.
- U.S. Bureau of Labor Statistics — Occupational Employment & Wage Statistics (OES). National median annual wages by SOC for clean-energy occupations. Where a state-level series is unavailable, the national median is shown.
- O*NET Occupation Database (version 29.1). Task statements, skill importance scores, Job Zones, and technology examples per SOC.
How we join the data
USEER sector employment (at state × sector granularity) joins to BLS wage medians and O*NET occupation profiles at the SOC level. Every page shows the joined set — no manual curation per page.
Limitations
USEER is a survey-based estimate with sample error; published values are rounded for clarity. BLS OES wages at highly specialized SOCs (e.g., 17-2199.11 Energy Engineer) are occasionally suppressed at the state level.
Update cadence
The pipeline re-runs on a 7-day cooldown, triggered by real visitor traffic rather than WP-Cron. See Editorial Policy.