US Energy Information Administration · US Government work (public domain)
Annual electric power industry report. Provides utility names, ownership type, customer counts, retail sales, and service-territory mappings by county.
Used for
- Utility master list (which utilities exist and their basic shape)
- Service-territory map (which counties each utility serves)
- Customer-count ranking that drives 'top utilities' lists on state pages
Refreshed: Annual (typically October release, prior-year data)
US National Renewable Energy Laboratory · Public, attribution required
Authoritative database of public alternative-fuel charging stations including network operator, connector type, port counts, and location.
Used for
- Public charging network breakdown on state pages
- Top cities for public charging on state pages
- Federal corridor (NEVI) program context
- National network rollup on the /infrastructure dashboard
Refreshed: Weekly ingest from the NREL API
US Department of Housing and Urban Development · US Government work (public domain)
Authoritative quarterly mapping between US Postal Service ZIP codes and US Census counties.
Used for
- ZIP lookup tool (turns the visitor's ZIP into a county and state, then joins against EIA service-territory data to find their utility)
Refreshed: Quarterly
NC Clean Energy Technology Center at NC State University · Linked, not republished
Comprehensive registry of US incentives for renewable energy and energy efficiency, including EV-related programs at the federal, state, and utility level.
Used for
- Editorial research starting point for state-level and utility-level incentive details (we link to DSIRE listings rather than republish their content)
Refreshed: Continuously curated by NCCETC
US Internal Revenue Service · Linked, not republished
Authoritative source for the federal Clean Vehicle Credit and Used Clean Vehicle Credit, including MSRP caps, income caps, and battery sourcing rules.
Used for
- Federal credit information surfaced in the ZIP lookup tool and on state incentive listings
Refreshed: As IRS updates