FMCSA · Safety Measurement System register · Iowa
Controlled Substances/Alcohol in Iowa
- 592Violations recorded
- 25,803Registered carriers in the state
- 74,375State inspections addressing it
Driving under the influence of drugs or alcohol. Iowa carries 592 violations in this category, out of 14,736 recorded nationally, which places it 3 of 51 jurisdictions the register covers. Its share of the national figure is 0.040 as a fraction, banked by the build rather than turned into a ratio here. Nationally, a violation in this category carries an average severity weight of 8.55.
The state’s carriers by fleet size
- 1 power unit 13,594
- 2 to 5 power units 8,703
- 6 to 20 power units 2,156
- 21 to 100 power units 566
- 101 to 1,000 power units 106
- 1,000 or more power units 12
Other categories recorded in Iowa
- Crash Indicator in IA 3,675
- Driver Fitness in IA 5,712
- Hazardous Materials Compliance in IA 361
- Hours-of-Service Compliance in IA 24,242
- Unsafe Driving in IA 21,925
- Vehicle Maintenance in IA 62,002
Controlled Substances/Alcohol across every jurisdiction → Every category in Iowa →
Figures from the federal source files: EPA’s ECHO downloads, CMS provider files and the FMCSA census.
Counts from FMCSA SMS input files on data.transportation.gov: kjg3-diqy (Motor Carrier Census, 2,122,441 rows), rbkj-cgst (Inspection, 5,834,148), 8mt8-2mdr (Violation, 6,808,260), 4wxs-vbns (Crash, 255,582), p2mt-9ige (Out of Service Orders, 399,600); SoQL aggregates fetched 2026-09-16. The rank is taken over the jurisdictions this desk publishes, and the national figure beside it is the register’s own total for the category.
What this page shows
This page of the Velarion Records public-records register covers Controlled Substances/Alcohol in Iowa under the FMCSA Safety Measurement System, listing 592 violations recorded, 25,803 registered carriers in the state, and 74,375 state inspections addressing it. Iowa's 592 violations are out of 14,736 recorded nationally, with a share of the national figure of 0.040 as a fraction and an average national severity weight of 8.55 for a violation in this category. The page also lists Iowa's carriers by fleet size: 13,594 with 1 power unit, 8,703 with 2 to 5 power units, 2,156 with 6 to 20 power units, 566 with 21 to 100 power units, 106 with 101 to 1,000 power units, and 12 with 1,000 or more power units.