Plumbers · South Carolina

Thornley's Service Inc.

Johns Island, SC · ~30 workers · 3 years of OSHA Injury Tracking Application data.

D
Poor Safety Record
3.8
Avg TCR
2.8
Industry avg
0
Fatalities
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The verdict

Thornley's Service Inc. runs at 134% of its industry's injury rate - more dangerous than the typical Plumbers workplace, earning a grade D.

Thornley's Service Inc.: 3.8 TCR = 134% of Plumbers BLS 2.8 · 3y Form 300A (see methodology below)

Thornley's Service Inc. safety composite

Thornley's Service Inc. scores strongest on dart rate (safer than 80% of same-industry peers) and weakest on total case rate (tcr) (safer than 46%), 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

59/100

Percentile-weighted across 3 of 3 measures

Total Case Rate (TCR)
D 3.75 per 100 workers

Safer than 46% of industry peers

DART rate
B 0 per 100 workers

Safer than 80% 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

−3.9

2016→2018

Thornley's Service Inc. injury rate improved

Thornley's Service Inc.'s TCR fell 3.9 from 3.9 in 2016 to 0.0 in 2018. Peak filing year was 2017 at 7.3 TCR. In 2018, DART was 0× this establishment's average TCR (severity share of cases).

2016=3.9 · 2017=7.3 · 2018=0.0

OSHA ITA Form 300A scorecard

Establishment book 238220 · Johns Island, SC ABOVE-IND · SMALL

Grade D · TCR 3.8 · 134% of ind

  • DART 0.0 DART
  • RANK #33/54
  • PHOTO Jack L Woods Plumbin…
  • BOOK 3y book
  • INJ 3 inj
  • SIZE ~30 FTE

Nearest TCR peer: Jack L Woods Plumbing Co Inc (0.0 TCR gap)

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

Thornley's Service Inc. in the TCR neighbourhood

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

TCR

What this shows Thornley's Service Inc. averages 3.8 TCR (134% of the Plumbers BLS benchmark).

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

Thornley's Service Inc. TCR series: 2016=3.9 · 2017=7.3 · 2018=0 · BLS 2.8

Where Thornley's Service Inc. falls in its industry

5,793 Plumbers establishments

Safer than 46% of graded establishments in this industry, whose median TCR is 3.3.

More dangerous than peersSafer than peers

Narrower to South Carolina alone (the establishments it most directly competes with for workers and contracts): ranked #33 safest of 54 Plumbers employers in South Carolina.

Thornley's Service Inc. (30 employees, TCR 3.8) 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 Thornley's Service Inc.
Thornley's Service Inc. (30 employees, TCR 3.8) among 29 same-industry peers, split at the industry median of 60 employees and a TCR of 3.3

Thornley's Service Inc. has fewer employees than the Plumbers 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
2018 0.0 0.0 0 0 0
2017 7.3 3.7 2 0 0
2016 3.9 0.0 1 0 0

OSHA ITA peer cross-reference

Establishment peer ledger

238220 · SC · Johns Island

5,793 Plumbers employers nationwide with a credible TCR · 7,610 rated employers in South Carolina with headcount on file · 20 employers in Johns Island, SC · 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 Jack L Woods Plumbing Co Inc 3.8 TCR
NAICS-TCR Sun Ray Heating, Inc. 3.8 TCR
NAICS-TCR Perfection Group, Inc., Cincinnati 3.8 TCR
NAICS-TCR CHOP VARIOUS 3.8 TCR
STATE-SIZE FAIRFIELD PUMPED STORAGE HYDRO 30 FTE
STATE-SIZE DENMARK DISTRICT OFFICE 30 FTE
STATE-SIZE Greenwood Operations Center 30 FTE
STATE-SIZE Anderson Resource Center - PNG 30 FTE
CITY-NEAR Kiawah Resort Associates 407 FTE
CITY-NEAR Seabrook Island Club 235 FTE
CITY-NEAR Store 1145 179 FTE
CITY-NEAR 6921-00451 115 FTE
NAT-TCR Liberty Residential - 870 Old Trail Rd. 3.8 TCR
NAT-TCR Carthage SNF, LP D/B/A Briarcliff 3.8 TCR
NAT-TCR Michaels Artistree 6500 3.8 TCR
NAT-TCR dd's DISCOUNTS Store 5197 3.8 TCR
NAT-SIZE DB Schenker Inc. - (Triumph Aerosystems-Tulsa) 30 FTE
NAT-SIZE National Grid 30 FTE
NAT-SIZE Benedict 30 FTE
NAT-SIZE Arc Twin Cities Brooklyn Center 30 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: 2018, 2017, 2016. This is publicly available government data - not a legal determination of workplace conditions.
Data sourced from official public datasets. See our methodology for details.