Auto supply stores · Iowa

Arnold Motor Supply

Spencer, IA · ~764 workers · 6 years of OSHA Injury Tracking Application data.

F
Failing Safety Record
7.8
Avg TCR
3.4
Industry avg
0
Fatalities
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The verdict

Arnold Motor Supply runs at 230% of its industry's injury rate - far more dangerous than the typical Auto supply stores workplace, earning a grade F.

Arnold Motor Supply: 7.8 TCR = 230% of Auto supply stores BLS 3.4 · 6y Form 300A (see methodology below)

Arnold Motor Supply safety composite

Arnold Motor Supply scores strongest on fatalities (safer than 50% of same-industry peers) and weakest on total case rate (tcr) (safer than 20%), blended into one 0-100 breakdown against same-industry peers. A missing measure drops out and redistributes its weight rather than deflating the score. This is a per-dimension breakdown, distinct from the single letter grade above it (which weights TCR alone against the BLS industry benchmark).

D

38/100

Percentile-weighted across 3 of 3 measures

Total Case Rate (TCR)
F 7.83 per 100 workers

Safer than 20% of industry peers

DART rate
D 1.26 per 100 workers

Safer than 49% of industry peers

Fatalities
D 0

Safer than 50% of industry peers

Benchmarked live against every credibly-rated employer in the same NAICS industry code in the current OSHA extract (a segment must have at least 8 rated peers to benchmark). Not a legal or compliance determination; PlainSafetyScore's own weighting (TCR 40%, DART 35%, fatalities 25%).

TCR Δ

−24.1

2016→2023

Arnold Motor Supply injury rate improved

Arnold Motor Supply's TCR fell 24.1 from 29.0 in 2016 to 4.9 in 2023. Peak filing year was 2016 at 29.0 TCR. In 2023, DART was 0.16× this establishment's average TCR (severity share of cases).

2016=29.0 · 2017=3.1 · 2018=5.3 · 2021=0.3 · 2022=4.4 · 2023=4.9

OSHA ITA Form 300A scorecard

Establishment book 441310 · Spencer, IA ABOVE-IND · MID

Grade F · TCR 7.8 · 230% of ind

  • DART 1.3 DART
  • RANK #12/17
  • PHOTO Auto Parts City Inc
  • BOOK 6y book
  • INJ 152 inj
  • SIZE ~764 FTE

Nearest TCR peer: Auto Parts City Inc (0.0 TCR gap)

Read with this employer → · Industry book → · Iowa employers → · Look up another →

Arnold Motor Supply in the TCR neighbourhood

Average Total Case Rate among this establishment and nearest same-industry peers

TCR

What this shows Arnold Motor Supply averages 7.8 TCR (230% of the Auto supply stores BLS benchmark).

Source U.S. Department of Labor, OSHA Injury Tracking Application (Form 300A) As of 2026-08-25

Arnold Motor Supply TCR series: 2016=29 · 2017=3.1 · 2018=5.3 · 2021=0.3 · 2022=4.4 · 2023=4.9 · BLS 3.4

Where Arnold Motor Supply falls in its industry

1,258 Auto supply stores establishments

Safer than 20% of graded establishments in this industry, whose median TCR is 4.4.

More dangerous than peersSafer than peers

Narrower to Iowa alone (the establishments it most directly competes with for workers and contracts): ranked #12 safest of 17 Auto supply stores employers in Iowa.

Arnold Motor Supply (764 employees, TCR 7.8) among 29 same-industry peers, split at the industry median of 30 employees and a TCR of 4.4 2×2 strategic matrix plotting 30 entities by Average employees (X) and Total Case Rate (Y), with a crosshair dividing the plot into four quadrants. Larger & higher-riskSmaller & higher-riskLarger & saferSmaller & safer than peers 05001,0001,500 05101520 Average employees Total Case Rate Arnold Motor Supply
Arnold Motor Supply (764 employees, TCR 7.8) among 29 same-industry peers, split at the industry median of 30 employees and a TCR of 4.4

Arnold Motor Supply has more employees than the Auto supply stores median and a higher injury rate than the industry's median TCR of 4.4. Workforce size and injury rate do not always move together within the same industry -- some of its smaller peers run higher rates than its larger ones, and vice versa.

Year-by-Year Safety Data

Year TCR DART Injuries Illnesses Fatalities
2023 4.9 1.3 35 0 0
2022 4.4 1.1 25 0 0
2021 0.3 0.1 25 2 0
2018 5.3 1.4 31 0 0
2017 3.1 0.8 18 0 0
2016 29.0 1.5 18 1 0

OSHA ITA peer cross-reference

Establishment peer ledger

441310 · IA · Spencer

1,258 Auto supply stores employers nationwide with a credible TCR · 7,192 rated employers in Iowa with headcount on file · 44 employers in Spencer, IA · 4 cross-state NAT-TCR peers · 4 cross-state NAT-SIZE peers. Closest matches by relationship code are listed below.

Rel Establishment Metric
NAICS-TCR Auto Parts City Inc 7.8 TCR
NAICS-TCR Fisher Auto Parts - BENSPA 7.9 TCR
NAICS-TCR PBY NY Queens Village 7.8 TCR
NAICS-TCR Jerry Carney and Sons Inc 7.9 TCR
STATE-SIZE MSD DAVENPORT 764 FTE
STATE-SIZE John Deere Ottumwa Works 758 FTE
STATE-SIZE Pine Ridge Farms 770 FTE
STATE-SIZE Glenwood Resource Center 757 FTE
CITY-NEAR Spencer Hospital 516 FTE
CITY-NEAR Spencer Municipal Hospital 515 FTE
CITY-NEAR WM 2714 221 FTE
CITY-NEAR 2714 213 FTE
NAT-TCR Timpte DC MFG 7.8 TCR
NAT-TCR Hesperia 20438 7.8 TCR
NAT-TCR American House - Wildwood 7.8 TCR
NAT-TCR Washington County/Johnson City EMS 7.8 TCR
NAT-SIZE Catlettsburg Refinery 764 FTE
NAT-SIZE Southview 764 FTE
NAT-SIZE Musculoskeletal Transplant Foundation -May Street 764 FTE
NAT-SIZE Adventist Healthcare Support Center to SGMC 764 FTE

Rel codes: NAICS-TCR · STATE-SIZE · CITY-NEAR · NAT-TCR/NAT-SIZE cross-state. Read with this employer →

Data Source: OSHA Injury Tracking Application (ITA), mandatory establishment-level injury/illness reports. Grades compare employer Total Case Rate (TCR) to BLS IIF industry benchmarks. Data covers years reported by this establishment: 2023, 2022, 2021, 2018, 2017, 2016. This is publicly available government data - not a legal determination of workplace conditions.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from official public datasets. See our methodology for details.