Air system balancing and testing · Iowa

TWC Services, Inc.

Des Moines, IA · ~624 workers · 8 years of OSHA Injury Tracking Application data.

B
Good Safety Record
2.1
Avg TCR
2.8
Industry avg
0
Fatalities
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The verdict

TWC Services, Inc. runs at 77% of its industry's injury rate - safer than the typical Air system balancing and testing workplace, earning a grade B.

TWC Services, Inc.: 2.1 TCR = 77% of Air system balancing and testing BLS 2.8 · 8y Form 300A (see methodology below)

TWC Services, Inc. safety composite

TWC Services, Inc. scores strongest on total case rate (tcr) (safer than 66% 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).

C

58/100

Percentile-weighted across 3 of 3 measures

Total Case Rate (TCR)
C 2.15 per 100 workers

Safer than 66% of industry peers

DART rate
C 0.79 per 100 workers

Safer than 55% 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

−1.3

2016→2024

TWC Services, Inc. injury rate improved

TWC Services, Inc.'s TCR fell 1.3 from 2.7 in 2016 to 1.4 in 2024. Peak filing year was 2019 at 2.8 TCR. In 2024, DART was 0.37× this establishment's average TCR (severity share of cases).

2016=2.7 · 2017=1.6 · 2018=2.7 · 2019=2.8 · 2021=2.5 · 2022=2.3 · 2023=1.3 · 2024=1.4

OSHA ITA Form 300A scorecard

Establishment book 238220 · Des Moines, IA AT/BELOW-IND · MID

Grade B · TCR 2.1 · 77% of ind

  • DART 0.8 DART
  • RANK #30/94
  • PHOTO Bear Industries, Inc
  • BOOK 8y book
  • INJ 114 inj
  • SIZE ~624 FTE

Nearest TCR peer: Bear Industries, Inc (0.0 TCR gap)

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

TWC Services, Inc. in the TCR neighbourhood

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

TCR

What this shows TWC Services, Inc. averages 2.1 TCR (77% 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

TWC Services, Inc. TCR series: 2016=2.7 · 2017=1.6 · 2018=2.7 · 2019=2.8 · 2021=2.5 · 2022=2.3 · 2023=1.3 · 2024=1.4 · BLS 2.8

Where TWC Services, Inc. falls in its industry

5,793 Air system balancing and testi establishments

Safer than 66% of graded establishments in this industry, whose median TCR is 3.3.

More dangerous than peersSafer than peers

Narrower to Iowa alone (the establishments it most directly competes with for workers and contracts): ranked #30 safest of 94 Air system balancing and testi employers in Iowa.

TWC Services, Inc. (624 employees, TCR 2.1) 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 0200400600800 05101520 Average employees Total Case Rate TWC Services, Inc.
TWC Services, Inc. (624 employees, TCR 2.1) among 29 same-industry peers, split at the industry median of 60 employees and a TCR of 3.3

TWC 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
2024 1.4 0.8 14 0 0
2023 1.3 0.9 12 0 0
2022 2.3 1.5 18 0 0
2021 2.5 1.9 17 0 0
2019 2.8 2.2 18 0 0
2018 2.7 1.3 15 0 0
2017 1.6 0.6 8 0 0
2016 2.7 1.6 12 0 0

OSHA ITA peer cross-reference

Establishment peer ledger

238220 · IA · Des Moines

5,793 Air system balancing and testing employers nationwide with a credible TCR · 7,192 rated employers in Iowa with headcount on file · 525 employers in Des Moines, IA · 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 Bear Industries, Inc 2.1 TCR
NAICS-TCR TMS, Inc. 2.1 TCR
NAICS-TCR Stephens Plumbing, Inc. 2.1 TCR
NAICS-TCR Apex Mechanical LLC 2.1 TCR
STATE-SIZE Horseshoe Council Bluffs 624 FTE
STATE-SIZE Sukup Sheffield Manufacturing Facility 623 FTE
STATE-SIZE Musco Sports Lighting, LLC / Corporate Office 625 FTE
STATE-SIZE ChildServe Center 621 FTE
CITY-NEAR Corporate Center 6,292 FTE
CITY-NEAR Mercy Medical Center - Des Moines 4,884 FTE
CITY-NEAR MercyOne Des Moines 3,547 FTE
CITY-NEAR Des Moines Methodist Hospital 3,495 FTE
NAT-TCR Freeport 2.1 TCR
NAT-TCR Plant 4 2.1 TCR
NAT-TCR Oshkosh, WI Location 2.1 TCR
NAT-TCR Cil, Inc. 2.1 TCR
NAT-SIZE TriStar Southern Hills Medical Center 624 FTE
NAT-SIZE Espinoza Farm Labor Contractor 624 FTE
NAT-SIZE Houston Portwall St Plant 624 FTE
NAT-SIZE Adams Memorial Hospital 624 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, 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.