What is HILL BROTHERS CHEMICAL COMPANY's USDOT number?

HILL BROTHERS CHEMICAL COMPANY is registered under USDOT 50146, based in Phoenix, AZ. FMCSA classifies it as a private (not-for-hire) carrier that is registered to haul hazardous materials.

How large is HILL BROTHERS CHEMICAL COMPANY's fleet?

HILL BROTHERS CHEMICAL COMPANY reports 50 power units and 40 drivers in its FMCSA record in Phoenix, AZ.

HILL BROTHERS CHEMICAL COMPANY

USDOT 50146 · Phoenix, AZ

Not for-hireHazmat

Quick answers

What is HILL BROTHERS CHEMICAL COMPANY's USDOT number?: HILL BROTHERS CHEMICAL COMPANY is registered under USDOT 50146, based in Phoenix, AZ. FMCSA classifies it as a private (not-for-hire) carrier that is registered to haul hazardous materials.
How large is HILL BROTHERS CHEMICAL COMPANY's fleet?: HILL BROTHERS CHEMICAL COMPANY reports 50 power units and 40 drivers in its FMCSA record in Phoenix, AZ.

Answers reflect the public FMCSA record as of June 6, 2026; figures can change at any time.

Operating snapshot

50Power units (fleet size)

40Drivers reported

52Years since registration

1.2MAnnual miles reported (2023)

Phoenix, AZHome base

90Inspections (24 mo)

Public FMCSA census & inspection records · as of 2026-06-06

Low

HaulReport estimate · highest estimated percentile

Vehicle Maintenance is this carrier's highest reconstructed BASIC percentile at the 16.2th percentile among 19,381 safety-event peers. Across 2 rated categories, 2 are estimated Low. Higher percentile = more inspection-violation activity recorded relative to peers. An independent estimate, not an official FMCSA or CSA score.

Estimated from public FMCSA data · updated 2026-06-08 · How we calculate this

HILL BROTHERS CHEMICAL COMPANY is a private property motor carrier based in Phoenix, AZ, operating 50 power units and 40 drivers, and has been registered with FMCSA for about 52 years (since 1974). It is flagged as a hazardous-materials carrier in the FMCSA census. In this public FMCSA inspection snapshot it has 90 recorded inspections, with a vehicle out-of-service rate of 7.1% (below the 21.2% snapshot benchmark) and a driver out-of-service rate of 1.1% (below the 5.2% benchmark). HaulReport's highest reconstructed BASIC percentile for this carrier is Vehicle Maintenance at the 16.2th percentile (estimated band: Low), ranked among 19,381 safety-event peers — an independent estimate, not an official FMCSA or CSA score.

HaulReport interpretation — auto-generated from the public FMCSA data below and our percentile estimates.

Estimated BASIC percentiles

Hours-of-Service ComplianceLow

8.5 pctl · CI 4–14

BASIC measure: 0.05Insp. w/ violation: 88Peer group: 20,717

Vehicle MaintenanceLow

16.2 pctl · CI 11–21

BASIC measure: 1.60Insp. w/ violation: 85Peer group: 19,381

Out-of-service rates

Vehicle OOS7.1%below the 21.2% snapshot benchmark · 85 inspections

Driver OOS1.1%below the 5.2% snapshot benchmark · 88 inspections

Out-of-service rate = inspections resulting in an out-of-service order ÷ inspections. The benchmark is the inspection-weighted rate across this FMCSA snapshot — not an official national average. Rates are shown only with at least 5 inspections.

MCS-150 biennial update

Due June 2028

Next biennial update dueJune 2028

Recurring update monthJune, even-numbered years

Last MCS-150 update on fileSeptember 18, 2025

FMCSA sets each carrier's biennial update month from the last two digits of the USDOT number (last digit → month, second-to-last digit → odd/even year) — it is required even when nothing has changed. This is a schedule derived from the public rule, not a compliance determination. Verify and file on FMCSA · Deadline calculator

Change history & operating authority

July 6, 2026authority live record changed — safety_rating: — → S
July 3, 2026Removed from the active FMCSA carrier census
June 22, 2026Carrier operation type changed — B → A
June 15, 2026Added to the FMCSA carrier census

Operating-authority status is from FMCSA's licensing system; the change history is HaulReport's own append-only daily record (FMCSA does not publish change history). This is a factual record, not an official CSA score or safety rating, and can change at any time. Verify on FMCSA SAFER · See this carrier's changes in the daily FMCSA activity feed

Independent estimate — not an official FMCSA or CSA score. Highest estimated percentile band: Low.

This percentile is an independent estimate produced by ranking FMCSA's publicly published BASIC measure within a safety-event peer group. FMCSA does not publish percentiles for property carriers; this figure is HaulReport's reconstruction and may differ from any internal FMCSA value. Bands describe percentile ranges among peers, not safety judgments. It is provided for general informational purposes only; it is not a consumer report and may not be used for any purpose governed by the Fair Credit Reporting Act (including credit, insurance, employment, or tenant screening), and it is not a safety rating, a fitness determination, legal advice, or a recommendation to do business with any carrier. Always verify against official FMCSA sources before relying on it.

Carrier facts (public FMCSA data)

Verbatim public facts from FMCSA datasets. Only the percentile/band/confidence figures above are HaulReport reconstructions — **not** official FMCSA or CSA scores.
USDOT number	50146
Legal name	HILL BROTHERS CHEMICAL COMPANY
Location	PHOENIX, AZ
Operating classification	Not for-hire (per FMCSA census)
Hazmat carrier	Yes (per FMCSA census)
Power units (fleet size)	50
Drivers	40
Reported annual mileage	1,177,268 (reported for 2023)
FMCSA registered	1974 (~52 years)
Last MCS-150 update	September 18, 2025
Next MCS-150 update due	June 2028
Inspections (trailing 24 mo)	90
Published BASIC measures	2

← Browse the HaulReport carrier directoryIs this your carrier? Request a correction or update →

State reference data: Truck-crash statistics for Arizona — state-wide totals for all carriers registered in Arizona, not specific to this carrier.

FMCSA data as of 2026-06-06 · Last synced 2026-06-08 · Method: how these percentiles are reconstructed · Canonical: https://haulreport.com/carrier/50146/