Air system balancing and testing · Missouri

Rock Hill Mechanical Corporation

Name: Rock Hill Mechanical Corporation Workplace Safety Data
Creator: PlainSafetyScore
License: https://creativecommons.org/publicdomain/zero/1.0/

Kirkwood, MO · ~112 workers · 6 years of OSHA Injury Tracking Application data.

Compiled by PlainSafetyScore · August 25, 2026

B
Good Safety Record: 1.8
Avg TCR: 2.8
Industry avg: 0
Fatalities

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The verdict

Rock Hill Mechanical Corporation runs at 66% of its industry's injury rate - safer than the typical Air system balancing and testing workplace, earning a grade B.

Rock Hill Mechanical Corporation: 1.8 TCR = 66% of Air system balancing and testing BLS 2.8 · 6y Form 300A (see methodology below)

Rock Hill Mechanical Corporation safety composite

Rock Hill Mechanical Corporation scores strongest on total case rate (tcr) (safer than 72% of same-industry peers) and weakest on dart rate (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).

59/100

Percentile-weighted across 3 of 3 measures

Total Case Rate (TCR): C 1.84 per 100 workers

Safer than 72% of industry peers
DART rate: D 1.13 per 100 workers

Safer than 51% 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%).

Rising injury rate

Rock Hill Mechanical Corporation: 1.1 → 2.3 TCR

Peak year 2023 @ 2.8 TCR · DART/TCR 0.61× in 2024

Rock Hill Mechanical Corporation's TCR rose 1.2 from 1.1 in 2019 to 2.3 in 2024. Peak filing year was 2023 at 2.8 TCR. In 2024, DART was 0.61× this establishment's average TCR (severity share of cases).

OSHA ITA Form 300A scorecard

Establishment book 238220 · Kirkwood, MO AT/BELOW-IND · MID

Grade B · TCR 1.8 · 66% of ind

DART 1.1 DART
RANK #26/90
PHOTO Elgin
BOOK 6y book
INJ 12 inj
SIZE ~112 FTE

Nearest TCR peer: Elgin (0.0 TCR gap)

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This site

1.8
Elgin

1.8
S.A. Comunale

1.8
ALPHA MECHANIC

1.8
Impact Fire -

1.8

What this shows Rock Hill Mechanical Corporation averages 1.8 TCR (66% of the Air system balancing and testing BLS benchmark).

Rock Hill Mechanical Corporation TCR series: 2019=1.1 · 2020=0.9 · 2021=2.5 · 2022=1.5 · 2023=2.8 · 2024=2.3 · BLS 2.8

Where Rock Hill Mechanical Corporation falls in its industry

5,793 Air system balancing and testi establishments

Safer than 72% of graded establishments in this industry, whose median TCR is 3.3.

Grade B

More dangerous than peersSafer than peers

Narrower to Missouri alone (the establishments it most directly competes with for workers and contracts): ranked #26 safest of 90 Air system balancing and testi employers in Missouri.

Rock Hill Mechanical Corporation (112 employees, TCR 1.8) among 29 same-industry peers, split at the industry median of 60 employees and a TCR of 3.3

Rock Hill Mechanical Corporation 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
2024	2.3	1.1	2
2023	2.8	1.9	3
2022	1.5	1.5	2
2021	2.5	2.5	2
2020	0.9	0.9	1
2019	1.1	0.0	2

OSHA ITA peer cross-reference

Establishment peer ledger

238220 · MO · Kirkwood

5,793 Air system balancing and testing employers nationwide with a credible TCR · 10,075 rated employers in Missouri with headcount on file · 23 employers in Kirkwood, MO · 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	Elgin	ELGIN, IL	1.8 TCR
NAICS-TCR	S.A. Comunale - Fremont	FREMONT, OH	1.8 TCR
NAICS-TCR	ALPHA MECHANICAL, LLC	EL CAJON, CA	1.8 TCR
NAICS-TCR	Impact Fire - Venice, FL	VENICE, FL	1.8 TCR
STATE-SIZE	Sun Solar, LLC	SPRINGFIELD	112 FTE
STATE-SIZE	AMEREN MISSOURI - MO CMD	EXCELSIOR SPRINGS	112 FTE
STATE-SIZE	DeWitt & Associates, Inc.	SPRINGFIELD	112 FTE
STATE-SIZE	Kingsford Manufacturing co	BELLE	112 FTE
CITY-NEAR	WM 2694	Kirkwood	312 FTE
CITY-NEAR	2694	Kirkwood	297 FTE
CITY-NEAR	1279 - Kirkwood	Kirkwood	228 FTE
CITY-NEAR	ASHFIELD ACTIVE LIVING-ABERDEEN	Kirkwood	192 FTE
NAT-TCR	Hopkinsville Electric System	Hopkinsville, KY	1.8 TCR
NAT-TCR	Composite Technologies International Plant	Anniston, AL	1.8 TCR
NAT-TCR	Michaels Distribution Center #1 - Alliance	Fort Worth, TX	1.8 TCR
NAT-TCR	Peterson Cotractors, Inc.	Reinbeck, IA	1.8 TCR
NAT-SIZE	JTDM Enterprises, LLC.	Beaver Dam, WI	112 FTE
NAT-SIZE	Gray Metal South, Inc.	Dunn, NC	112 FTE
NAT-SIZE	Parham Care Center LLC	Richmond, VA	112 FTE
NAT-SIZE	Bluestone Communications Inc. - Folcroft	Folcroft, PA	112 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. 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.