Utility Company · California

CA-Mira Loma Substation

Ontario, CA · ~93 workers · 9 years of OSHA Injury Tracking Application data.

B
Good Safety Record
0.8
Avg TCR
1.2
Industry avg
0
Fatalities
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The verdict

CA-Mira Loma Substation runs at 63% of its industry's injury rate - safer than the typical Utility Company workplace, earning a grade B.

CA-Mira Loma Substation: 0.8 TCR = 63% of Utility Company BLS 1.2 · 9y Form 300A (see methodology below)

CA-Mira Loma Substation safety composite

CA-Mira Loma Substation scores strongest on total case rate (tcr) (safer than 82% of same-industry peers) and weakest on dart rate (safer than 32%), 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).

C

57/100

Percentile-weighted across 3 of 3 measures

Total Case Rate (TCR)
B 0.75 per 100 workers

Safer than 82% of industry peers

DART rate
F 1.85 per 100 workers

Safer than 32% of industry peers

Fatalities
D 0

Safer than 52% 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%).

Rising injury rate

CA-Mira Loma Substation: 1.0 → 1.9 TCR

Peak year 2017 @ 3.0 TCR · DART/TCR 2.47× in 2024

CA-Mira Loma Substation's TCR rose 0.9 from 1.0 in 2016 to 1.9 in 2024. Peak filing year was 2017 at 3.0 TCR. In 2024, DART was 2.47× this establishment's average TCR (severity share of cases).

OSHA ITA Form 300A scorecard

Establishment book 221121 · Ontario, CA AT/BELOW-IND · SMALL

Grade B · TCR 0.8 · 63% of ind

  • DART 1.9 DART
  • RANK #8/69
  • PHOTO CA-Chino Substation
  • BOOK 9y book
  • INJ 5 inj
  • SIZE ~93 FTE

Nearest TCR peer: CA-Chino Substation (0.0 TCR gap)

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

CA-Mira Loma Substation in the TCR neighbourhood

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

TCR

What this shows CA-Mira Loma Substation averages 0.8 TCR (63% of the Utility Company BLS benchmark).

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

CA-Mira Loma Substation TCR series: 2016=1 · 2017=3 · 2018=0 · 2019=0.9 · 2020=0 · 2021=0 · 2022=0 · 2023=0 · 2024=1.9 · BLS 1.2

Where CA-Mira Loma Substation falls in its industry

263 Utility Company establishments

Safer than 82% of graded establishments in this industry, whose median TCR is 2.2.

More dangerous than peersSafer than peers

Narrower to California alone (the establishments it most directly competes with for workers and contracts): ranked #8 safest of 69 Utility Company employers in California.

CA-Mira Loma Substation (93 employees, TCR 0.8) among 29 same-industry peers, split at the industry median of 71 employees and a TCR of 2.2 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 0200400600800 0246810 Average employees Total Case Rate CA-Mira Loma Substation
CA-Mira Loma Substation (93 employees, TCR 0.8) among 29 same-industry peers, split at the industry median of 71 employees and a TCR of 2.2

CA-Mira Loma Substation has more employees than the Utility Company median and a lower injury rate than the industry's median TCR of 2.2. 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
2024 1.9 1.9 2 0 0
2023 0.0 0.0 0 0 0
2022 0.0 0.0 0 0 0
2021 0.0 0.0 0 0 0
2020 0.0 0.0 0 0 0
2019 0.9 0.9 1 0 0
2018 0.0 0.0 0 0 0
2017 3.0 3.0 1 2 0
2016 1.0 0.0 1 0 0

OSHA ITA peer cross-reference

Establishment peer ledger

221121 · CA · Ontario

263 Utility Company 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 CA-Chino Substation 0.8 TCR
NAICS-TCR CO1 Cocoa Service Center 0.8 TCR
NAICS-TCR CA-Innovation Village 1 0.8 TCR
NAICS-TCR CA-Innovation Village 2 0.8 TCR
STATE-SIZE Mt. View Farming, Inc. 93 FTE
STATE-SIZE PAC-MAN 93 FTE
STATE-SIZE E A & T 93 FTE
STATE-SIZE Mountain Meadow Mushroom Farms, Inc. 93 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 TMF Health Quality Institute 0.8 TCR
NAT-TCR Headquarters 0.8 TCR
NAT-TCR Ryan Gootee General Contractors, LLC 0.8 TCR
NAT-TCR Knoxville 10405 0.8 TCR
NAT-SIZE Montrose Forest Products 93 FTE
NAT-SIZE Dunmore International Corporation - Keystone 93 FTE
NAT-SIZE Kempsville Component Plant 535 93 FTE
NAT-SIZE Glenn Rieder Residential LLC 93 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: 2024, 2023, 2022, 2021, 2020, 2019, 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.