Registered plumber apprentices by county, open recruitment windows where the state publishes them, and how the apprentice tier fits Hawaii's licence ladder. Updated nightly.
Hawaii has 437 registered plumber apprentices in active status (fiscal year 2025, DOL RAPIDS), placed in 4 counties, 3.0 per 10,000 residents. That is 18.0 apprentices for every 100 employed plumbers in the state, the rate at which the trade is training its own replacements.
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Registered plumber apprentices by county of the apprentice, largest first. Each county links to its plumbers market page.
| County | Apprentices | Share | Per 10k residents |
|---|---|---|---|
| Honolulu County | 357 | 82% | 3.6 |
| Maui County | 49 | 11% | 3.0 |
| Hawaii County | 16 | 4% | 0.8 |
| Kauai County | 15 | 3% | 2.0 |
Source: DOL RAPIDS apprenticeship FY2025, active status, county-coded; as of December 31, 2025.
The Hawaii register ATI reads carries no separate apprentice-tier credential for plumbers; its ladder for this trade starts at Journeyman (2,656 active records, read September 16, 2026). Registered apprentices in the county table above are counted from the federal apprenticeship system, not from the licence register.
Credential types the Hawaii Department of Commerce and Consumer Affairs, Professional and Vocational Licensing Division, Board of Electricians and Plumbers issues for this trade: Journey Worker Plumber (PJ), Master Plumber (PM). See how to get a plumber license in Hawaii for hours, exams and renewal.
Sources: registered apprentices: DOL RAPIDS apprenticeship FY2025, active status, as of December 31, 2025; employment: BLS QCEW construction x OEWS occupation share (estimate); licence tiers: Hawaii register read September 16, 2026; population: U.S. Census 2023 estimates.
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