Air system balancing and testing · California

Christian Brothers Mechanical Services, Inc.

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

Mira Loma, CA · ~209 workers · 2 years of OSHA Injury Tracking Application data.

Compiled by PlainSafetyScore · August 25, 2026

C
Average Safety Record: 2.2
Avg TCR: 2.8
Industry avg: 0
Fatalities

Subscribe to safety-record updates (RSS)

The verdict

Christian Brothers Mechanical Services, Inc. runs at 80% of its industry's injury rate - about level with the typical Air system balancing and testing workplace, earning a grade C.

Christian Brothers Mechanical Services, Inc.: 2.2 TCR = 80% of Air system balancing and testing BLS 2.8 · 2y Form 300A (see methodology below)

Christian Brothers Mechanical Services, Inc. safety composite

Christian Brothers Mechanical Services, Inc. scores strongest on total case rate (tcr) (safer than 65% of same-industry peers) and weakest on fatalities (safer than 51%), 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).

58/100

Percentile-weighted across 3 of 3 measures

Total Case Rate (TCR): C 2.24 per 100 workers

Safer than 65% of industry peers
DART rate: D 0.92 per 100 workers

Safer than 54% 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

−1.7

2018→2021

Christian Brothers Mechanical Services, Inc. injury rate improved

Christian Brothers Mechanical Services, Inc.'s TCR fell 1.7 from 3.1 in 2018 to 1.4 in 2021. Peak filing year was 2018 at 3.1 TCR. In 2021, DART was 0.41× this establishment's average TCR (severity share of cases).

2018=3.1 · 2021=1.4

OSHA ITA Form 300A scorecard

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

Grade C · TCR 2.2 · 80% of ind

DART 0.9 DART
RANK #177/594
PHOTO Kenron Main
BOOK 2y book
INJ 8 inj
SIZE ~209 FTE

Nearest TCR peer: Kenron Main (0.0 TCR gap)

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

This site

2.2
Kenron Main

2.2
Mtech

2.2
Automatic Fire

2.2
020D - SAN DIE

2.2

What this shows Christian Brothers Mechanical Services, Inc. averages 2.2 TCR (80% of the Air system balancing and testing BLS benchmark).

Christian Brothers Mechanical Services, Inc. TCR series: 2018=3.1 · 2021=1.4 · BLS 2.8

Where Christian Brothers Mechanical Services, Inc. falls in its industry

5,793 Air system balancing and testi establishments

Safer than 65% of graded establishments in this industry, whose median TCR is 3.3.

Grade C

More dangerous than peersSafer than peers

Narrower to California alone (the establishments it most directly competes with for workers and contracts): ranked #177 safest of 594 Air system balancing and testi employers in California.

Christian Brothers Mechanical Services, Inc. (209 employees, TCR 2.2) among 29 same-industry peers, split at the industry median of 60 employees and a TCR of 3.3

Christian Brothers Mechanical Services, Inc. has more employees than the Air system balancing and testing 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	Illnesses	Fatalities
2021	1.4	0.9	3	0	0
2018	3.1	1.3	5	0	0

OSHA ITA peer cross-reference

Establishment peer ledger

238220 · CA · Mira Loma

5,793 Air system balancing and testing employers nationwide with a credible TCR · 51,834 rated employers in California with headcount on file · 87 employers in Mira Loma, 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	Kenron Main	ROCHESTER, NY	2.2 TCR
NAICS-TCR	Mtech	WESTMINSTER, CO	2.2 TCR
NAICS-TCR	Automatic Fire Systems, Inc.	BIRMINGHAM, AL	2.2 TCR
NAICS-TCR	020D - SAN DIEGO FIRE	SAN DIEGO, CA	2.2 TCR
STATE-SIZE	Valle Del Sol	REEDLEY	209 FTE
STATE-SIZE	CA-Dominguez Hills S/C	COMPTON	209 FTE
STATE-SIZE	CENTRAL DISTRICT - POWER	LOS ANGELES	209 FTE
STATE-SIZE	Kraft Heinz -Tulare CA	TULARE	209 FTE
CITY-NEAR	Ono-014	Mira Loma	910 FTE
CITY-NEAR	0960 - MIRA LOMA CA (DRY) DEPOT	Mira Loma	828 FTE
CITY-NEAR	Del Real, LLC	Mira Loma	585 FTE
CITY-NEAR	MIRA LOMA OPERATIONS (CAMRL)	Mira Loma	554 FTE
NAT-TCR	A&A Transfer, LLC	Chantilly, VA	2.2 TCR
NAT-TCR	Lone Star Cold Storage	Richardson, TX	2.2 TCR
NAT-TCR	002-LISH-RIVERHEAD	Riverhead, NY	2.2 TCR
NAT-TCR	Mother Murphy's Elm	Greensboro, NC	2.2 TCR
NAT-SIZE	Main Plant	Ridgway, PA	209 FTE
NAT-SIZE	Envision Hospice Staff	El Paso, TX	209 FTE
NAT-SIZE	6458-ZLOR	Lorton, VA	209 FTE
NAT-SIZE	JJ Taylor Companies Inc. - Minnesota	Minneapolis, MN	209 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: 2021, 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.