Insulators, electrical (except glass, porcelain), manufacturing · California

LOS

Ontario, CA · ~38 workers · 7 years of OSHA Injury Tracking Application data.

D
Poor Safety Record
4.7
Avg TCR
3.3
Industry avg
0
Fatalities
Subscribe to safety-record updates (RSS)

The verdict

LOS runs at 143% of its industry's injury rate - more dangerous than the typical Insulators, electrical (except glass, porcelain), manufacturing workplace, earning a grade D.

LOS: 4.7 TCR = 143% of Insulators, electrical (except glass, porcelain), manufacturing BLS 3.3 · 7y Form 300A (see methodology below)

LOS safety composite

LOS scores strongest on dart rate (safer than 85% of same-industry peers) and weakest on total case rate (tcr) (safer than 21%), 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

51/100

Percentile-weighted across 3 of 3 measures

Total Case Rate (TCR)
F 4.71 per 100 workers

Safer than 21% of industry peers

DART rate
B 0 per 100 workers

Safer than 85% of industry peers

Fatalities
D 0

Safer than 51% 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

−7.9

2017→2023

LOS injury rate improved

LOS's TCR fell 7.9 from 7.9 in 2017 to 0.0 in 2023. Peak filing year was 2017 at 7.9 TCR. In 2023, DART was 0× this establishment's average TCR (severity share of cases).

2017=7.9 · 2018=5.7 · 2019=7.7 · 2020=3.3 · 2021=5.8 · 2022=2.6 · 2023=0.0

OSHA ITA Form 300A scorecard

Establishment book 335932 · Ontario, CA ABOVE-IND · SMALL

Grade D · TCR 4.7 · 143% of ind

  • DART 0.0 DART
  • RANK #3/4
  • PHOTO Hubbell RACO
  • BOOK 7y book
  • INJ 12 inj
  • SIZE ~38 FTE

Nearest TCR peer: Hubbell RACO (0.1 TCR gap)

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

LOS in the TCR neighbourhood

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

TCR

What this shows LOS averages 4.7 TCR (143% of the Insulators, electrical (except glass, porcelain), manufacturing BLS benchmark).

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

LOS TCR series: 2017=7.9 · 2018=5.7 · 2019=7.7 · 2020=3.3 · 2021=5.8 · 2022=2.6 · 2023=0 · BLS 3.3

Where LOS falls in its industry

71 Insulators, electrical (except establishments

Safer than 21% of graded establishments in this industry, whose median TCR is 2.6.

More dangerous than peersSafer than peers

Narrower to California alone (the establishments it most directly competes with for workers and contracts): ranked #3 safest of 4 Insulators, electrical (except employers in California.

LOS (38 employees, TCR 4.7) among 29 same-industry peers, split at the industry median of 110 employees and a TCR of 2.6 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 02004006008001,000 0246810 Average employees Total Case Rate LOS
LOS (38 employees, TCR 4.7) among 29 same-industry peers, split at the industry median of 110 employees and a TCR of 2.6

LOS has fewer employees than the Insulators, electrical (except glass, po median and a higher injury rate than the industry's median TCR of 2.6. 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 0.0 0.0 0 0 0
2022 2.6 2.6 1 0 0
2021 5.8 5.8 2 0 0
2020 3.3 3.3 1 0 0
2019 7.7 7.7 3 0 0
2018 5.7 5.7 2 0 0
2017 7.9 7.9 3 0 0

OSHA ITA peer cross-reference

Establishment peer ledger

335932 · CA · Ontario

71 Insulators, electrical (except glass, porcelain), manufacturing employers nationwide with a credible TCR · 51,834 rated employers in California with headcount on file · 599 employers in Ontario, CA · 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 Hubbell RACO 4.7 TCR
NAICS-TCR The Buferd Company dBa Unity Manufacturing 4.9 TCR
NAICS-TCR Unity Manufacturing 4.9 TCR
NAICS-TCR All-States, Inc. 4.5 TCR
STATE-SIZE CAL-O SHIPPING 38 FTE
STATE-SIZE GAR & S Farm Labor Services, Inc. 38 FTE
STATE-SIZE Supreme Almonds of California, Inc. 38 FTE
STATE-SIZE Bays Ranch Inc 38 FTE
CITY-NEAR Prime Healthcare Services Inc. Location: St. Mary's, Passaic LLC 46-3499370 (HP29) 10,997 FTE
CITY-NEAR CAONA - ONTARIO HUB 4,372 FTE
CITY-NEAR ONTARIO HUB (CAONA) 3,354 FTE
CITY-NEAR Atlantic Solutions Group Inc, Inc. DBA Empire Workforce Solutions 3,240 FTE
NAT-TCR Airtek Inc. 4.7 TCR
NAT-TCR MD 4.7 TCR
NAT-TCR Eagle Tubular Products 4.7 TCR
NAT-TCR Barker Wire Products, Inc. 4.7 TCR
NAT-SIZE Curtis Lumber Co. Inc. Plattsburgh 38 FTE
NAT-SIZE Atlanta - Lang 38 FTE
NAT-SIZE Division of Indian Work 38 FTE
NAT-SIZE Corporate Office 38 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, 2020, 2019, 2018, 2017. This is publicly available government data - not a legal determination of workplace conditions.
Data sourced from official public datasets. See our methodology for details.