Air system balancing and testing · Maryland

W.G./Welch Mechanical Contractors LLC

Frederick, Md, MD · ~49 workers · 3 years of OSHA Injury Tracking Application data.

D
Poor Safety Record
4.8
Avg TCR
2.8
Industry avg
0
Fatalities
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The verdict

W.G./Welch Mechanical Contractors LLC runs at 172% of its industry's injury rate - more dangerous than the typical Air system balancing and testing workplace, earning a grade D.

W.G./Welch Mechanical Contractors LLC: 4.8 TCR = 172% of Air system balancing and testing BLS 2.8 · 3y Form 300A (see methodology below)

W.G./Welch Mechanical Contractors LLC safety composite

W.G./Welch Mechanical Contractors LLC scores strongest on fatalities (safer than 51% of same-industry peers) and weakest on dart rate (safer than 35%), 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

39/100

Percentile-weighted across 3 of 3 measures

Total Case Rate (TCR)
D 4.82 per 100 workers

Safer than 36% of industry peers

DART rate
D 2.36 per 100 workers

Safer than 35% 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

−2.8

2022→2024

W.G./Welch Mechanical Contractors LLC injury rate improved

W.G./Welch Mechanical Contractors LLC's TCR fell 2.8 from 5.2 in 2022 to 2.4 in 2024. Peak filing year was 2023 at 6.9 TCR. In 2024, DART was 0.49× this establishment's average TCR (severity share of cases).

2022=5.2 · 2023=6.9 · 2024=2.4

OSHA ITA Form 300A scorecard

Establishment book 238220 · Frederick, Md, MD ABOVE-IND · SMALL

Grade D · TCR 4.8 · 172% of ind

  • DART 2.4 DART
  • RANK #88/121
  • PHOTO Santa Cruz Plumbing …
  • BOOK 3y book
  • INJ 7 inj
  • SIZE ~49 FTE

Nearest TCR peer: Santa Cruz Plumbing Inc (0.0 TCR gap)

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

W.G./Welch Mechanical Contractors LLC in the TCR neighbourhood

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

TCR

What this shows W.G./Welch Mechanical Contractors LLC averages 4.8 TCR (172% of the Air system balancing and testing BLS benchmark).

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

W.G./Welch Mechanical Contractors LLC TCR series: 2022=5.2 · 2023=6.9 · 2024=2.4 · BLS 2.8

Where W.G./Welch Mechanical Contractors LLC falls in its industry

5,793 Air system balancing and testi establishments

Safer than 36% of graded establishments in this industry, whose median TCR is 3.3.

More dangerous than peersSafer than peers

Narrower to Maryland alone (the establishments it most directly competes with for workers and contracts): ranked #88 safest of 121 Air system balancing and testi employers in Maryland.

W.G./Welch Mechanical Contractors LLC (49 employees, TCR 4.8) among 29 same-industry peers, split at the industry median of 60 employees and a TCR of 3.3 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 050100150200250 05101520 Average employees Total Case Rate W.G./Welch Mechanical Contractors LLC
W.G./Welch Mechanical Contractors LLC (49 employees, TCR 4.8) among 29 same-industry peers, split at the industry median of 60 employees and a TCR of 3.3

W.G./Welch Mechanical Contractors LLC has fewer employees than the Air system balancing and testing median and a higher 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
2024 2.4 2.4 1 0 0
2023 6.9 6.9 3 0 0
2022 5.2 0.0 3 0 0

OSHA ITA peer cross-reference

Establishment peer ledger

238220 · MD · Frederick, Md

5,793 Air system balancing and testing employers nationwide with a credible TCR · 7,213 rated employers in Maryland with headcount on file · 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 Santa Cruz Plumbing Inc 4.8 TCR
NAICS-TCR Mechanical One LLC 4.8 TCR
NAICS-TCR Dillon Boiler Services Co., Inc. 4.8 TCR
NAICS-TCR Perfection Group, Inc., Knoxville 4.8 TCR
STATE-SIZE Callas Contractors, LLC 49 FTE
STATE-SIZE CSI DC 49 FTE
STATE-SIZE Livingston Fire Protection 49 FTE
STATE-SIZE Krick Plumbing & Heating Co., Inc. 49 FTE
NAT-TCR Haworth Walls 4.8 TCR
NAT-TCR L&M Fleet Supply Escanaba 4.8 TCR
NAT-TCR Electric Mirror 4.8 TCR
NAT-TCR Frei Ranch Winery 4.8 TCR
NAT-SIZE White Oaks at McHenry 49 FTE
NAT-SIZE Cedar Creek Alzheimer's and Dementia Care Center 49 FTE
NAT-SIZE Arclin USA - Springfield 49 FTE
NAT-SIZE Intex Solutions, Inc. 49 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. 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.