Registered fire sprinkler fitter apprentices by county, open recruitment windows where the state publishes them, and how the apprentice tier fits Idaho's licence ladder. Updated nightly.
Idaho has 87 registered fire sprinkler fitter apprentices in active status (fiscal year 2025, DOL RAPIDS), placed in 19 counties, 0.4 per 10,000 residents. That is 2.6 apprentices for every 100 employed fire sprinkler fitters in the state, the rate at which the trade is training its own replacements.
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Registered fire sprinkler fitter apprentices by county of the apprentice, largest first. Each county links to its fire sprinkler fitters market page.
| County | Apprentices | Share | Per 10k residents |
|---|---|---|---|
| Ada County | 19 | 22% | 0.4 |
| Canyon County | 17 | 20% | 0.7 |
| Kootenai County | 13 | 15% | 0.7 |
| Bonneville County | 12 | 14% | 0.9 |
| Bingham County | 3 | 3% | 0.6 |
| Gem County | 3 | 3% | 1.4 |
| Jefferson County | 3 | 3% | 0.9 |
| Twin Falls County | 3 | 3% | 0.3 |
| Gooding County | 2 | 2% | 1.2 |
| Jerome County | 2 | 2% | 0.8 |
| Madison County | 2 | 2% | 0.4 |
| Bannock County | 1 | 1% | 0.1 |
| Blaine County | 1 | 1% | 0.4 |
| Boise County | 1 | 1% | 1.2 |
| Minidoka County | 1 | 1% | 0.4 |
| 4 other counties | 4 | 5% |
Source: DOL RAPIDS apprenticeship FY2025, active status, county-coded; as of December 31, 2025.
The Idaho register ATI reads carries no separate apprentice-tier credential for fire sprinkler fitters; its ladder for this trade starts at Journeyman (95 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 Idaho State Fire Marshal, Department of Insurance issues for this trade: Fire Protection Sprinkler Contractor licence / Certificate of Competency, Sprinkler fitter or apprentice registration where the state issues one, NICET certification in Automatic Sprinkler System Layout or Water-Based Systems. See how to get a fire sprinkler fitter license in Idaho 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: Idaho register read September 16, 2026; population: U.S. Census 2023 estimates.
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