HVAC (heating, ventilation and air-conditioning) contractors · California

Multi Mechanical, Inc

Name: Multi Mechanical, Inc Workplace Safety Data
Creator: PlainSafetyScore
License: https://creativecommons.org/publicdomain/zero/1.0/

Corona, CA · ~114 workers · 5 years of OSHA Injury Tracking Application data.

Compiled by PlainSafetyScore · August 25, 2026

B
Good Safety Record: 1.7
Avg TCR: 2.8
Industry avg: 0
Fatalities

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The verdict

Multi Mechanical, Inc runs at 62% of its industry's injury rate - safer than the typical HVAC (heating, ventilation and air-conditioning) contractors workplace, earning a grade B.

Multi Mechanical, Inc: 1.7 TCR = 62% of HVAC (heating, ventilation and air-conditioning) contractors BLS 2.8 · 5y Form 300A (see methodology below)

Multi Mechanical, Inc safety composite

Multi Mechanical, Inc scores strongest on total case rate (tcr) (safer than 73% of same-industry peers) and weakest on dart rate (safer than 44%), 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).

57/100

Percentile-weighted across 3 of 3 measures

Total Case Rate (TCR): C 1.74 per 100 workers

Safer than 73% of industry peers
DART rate: D 1.65 per 100 workers

Safer than 44% 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

−2.9

2018→2022

Multi Mechanical, Inc injury rate improved

Multi Mechanical, Inc's TCR fell 2.9 from 4.6 in 2018 to 1.6 in 2022. Peak filing year was 2018 at 4.6 TCR. In 2022, DART was 0.95× this establishment's average TCR (severity share of cases).

2018=4.6 · 2019=1.2 · 2020=0.0 · 2021=1.3 · 2022=1.6

OSHA ITA Form 300A scorecard

Establishment book 238220 · Corona, CA AT/BELOW-IND · MID

Grade B · TCR 1.7 · 62% of ind

DART 1.6 DART
RANK #140/594
PHOTO Custom Mechanical Co…
BOOK 5y book
INJ 10 inj
SIZE ~114 FTE

Nearest TCR peer: Custom Mechanical Construction, Inc. (0.0 TCR gap)

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

This site

1.7
Custom Mechani

1.7
Campbell, Inc.

1.7
0D26 - DETROIT

1.7
W. Soule and C

1.7

What this shows Multi Mechanical, Inc averages 1.7 TCR (62% of the HVAC (heating, ventilation and air-conditioning) contractors BLS benchmark).

Multi Mechanical, Inc TCR series: 2018=4.6 · 2019=1.2 · 2020=0 · 2021=1.3 · 2022=1.6 · BLS 2.8

Where Multi Mechanical, Inc falls in its industry

5,793 HVAC (heating, ventilation and establishments

Safer than 73% of graded establishments in this industry, whose median TCR is 3.3.

Grade B

More dangerous than peersSafer than peers

Narrower to California alone (the establishments it most directly competes with for workers and contracts): ranked #140 safest of 594 HVAC (heating, ventilation and employers in California.

Multi Mechanical, Inc (114 employees, TCR 1.7) among 29 same-industry peers, split at the industry median of 60 employees and a TCR of 3.3

Multi Mechanical, Inc has more employees than the HVAC (heating, ventilation and air-condi median and a lower injury rate than the industry's median TCR of 3.3. 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
2022	1.6	1.6	1
2021	1.3	1.3	1
2020	0.0	0.0	0
2019	1.2	1.2	2
2018	4.6	4.6	6

OSHA ITA peer cross-reference

Establishment peer ledger

238220 · CA · Corona

5,793 HVAC (heating, ventilation and air-conditioning) contractors employers nationwide with a credible TCR · 51,834 rated employers in California with headcount on file · 409 employers in Corona, CA · 4 cross-state NAT-TCR peers · 4 cross-state NAT-SIZE peers. Closest matches by relationship code are listed below.

Rel	Establishment	Place	Metric
NAICS-TCR	Custom Mechanical Construction, Inc.	EVANSVILLE, IN	1.7 TCR
NAICS-TCR	Campbell, Inc.	NORTHWOOD, OH	1.7 TCR
NAICS-TCR	0D26 - DETROIT FIRE	TROY, MI	1.7 TCR
NAICS-TCR	W. Soule and Compnany	PORTAGE, MI	1.7 TCR
STATE-SIZE	Wonderful Orchards-Belridge	MCKITTRICK	114 FTE
STATE-SIZE	Olivarez Honey Bees	ORLAND	114 FTE
STATE-SIZE	SIERRA AG SERVICES, INC	DELANO	114 FTE
STATE-SIZE	PURO VIDA BERRIES	OXNARD	114 FTE
CITY-NEAR	Monster Energy Company 2535 Anselmo Dr	Corona	2,572 FTE
CITY-NEAR	Monster Energy Company	Corona	2,388 FTE
CITY-NEAR	Monster Energy Company - Anselmo Dr, Corona	Corona	2,335 FTE
CITY-NEAR	California Department of Transportation Facility 289	Corona	1,587 FTE
NAT-TCR	1281 - Lincoln South	Lincoln, NE	1.7 TCR
NAT-TCR	49 - Burnsville	Burnsville, MN	1.7 TCR
NAT-TCR	Southern States Charles Town Service	Ranson, WV	1.7 TCR
NAT-TCR	Processing plant	Harrisonburg, VA	1.7 TCR
NAT-SIZE	South Shore Transportation	Sandusky, OH	114 FTE
NAT-SIZE	BOS-ODFL	Dracut, MA	114 FTE
NAT-SIZE	Fairmont Jr & Sr High	Fairmont, MN	114 FTE
NAT-SIZE	Buy Sod USA, LLC	Pinehurst, NC	114 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: 2022, 2021, 2020, 2019, 2018. 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.