Plumbers · Maryland
O'Connor Plumbing
Frederick, MD · ~129 workers · 2 years of OSHA Injury Tracking Application data.
- B
- Good Safety Record
- 2.1
- Avg TCR
- 2.8
- Industry avg
- 0
- Fatalities
The verdict
O'Connor Plumbing runs at 74% of its industry's injury rate - safer than the typical Plumbers workplace, earning a grade B.
O'Connor Plumbing: 2.1 TCR = 74% of Plumbers BLS 2.8 · 2y Form 300A (see methodology below)
O'Connor Plumbing safety composite
O'Connor Plumbing scores strongest on total case rate (tcr) (safer than 68% of same-industry peers) and weakest on dart rate (safer than 36%), 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).
53/100
Percentile-weighted across 3 of 3 measures
- Total Case Rate (TCR)
- C 2.06 per 100 workers
Safer than 68% of industry peers
- DART rate
- D 2.31 per 100 workers
Safer than 36% 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
O'Connor Plumbing: 1.8 → 2.3 TCR
Peak year 2024 @ 2.3 TCR · DART/TCR 1.12× in 2024
O'Connor Plumbing's TCR rose 0.5 from 1.8 in 2023 to 2.3 in 2024. In 2024, DART was 1.12× this establishment's average TCR (severity share of cases).
OSHA ITA Form 300A scorecard
Establishment book 238220 · Frederick, MD AT/BELOW-IND · MID
Grade B · TCR 2.1 · 74% of ind
- DART 2.3 DART
- RANK #49/121
- PHOTO Corporate Office
- BOOK 2y book
- INJ 5 inj
- SIZE ~129 FTE
Nearest TCR peer: Corporate Office (0.0 TCR gap)
Read with this employer → · Industry book → · Maryland employers → · Look up another →
O'Connor Plumbing in the TCR neighbourhood
Average Total Case Rate among this establishment and nearest same-industry peers
- This site
O'Connor Plumbing
2.1 TCR
- Corporate Offi
Corporate Office
2.1 TCR
- IES Santa Rosa
IES Santa Rosa
2.1 TCR
- Holt Mechanica
Holt Mechanical
2.1 TCR
- Hussung Mechan
Hussung Mechanical Contractors, Inc.
2.1 TCR
What this shows O'Connor Plumbing averages 2.1 TCR (74% of the Plumbers BLS benchmark).
O'Connor Plumbing TCR series: 2023=1.8 · 2024=2.3 · BLS 2.8
Where O'Connor Plumbing falls in its industry
5,793 Plumbers establishmentsSafer than 68% of graded establishments in this industry, whose median TCR is 3.3.
Narrower to Maryland alone (the establishments it most directly competes with for workers and contracts): ranked #49 safest of 121 Plumbers employers in Maryland.
O'Connor Plumbing has more employees than the Plumbers 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 | 2.3 | 2.3 | 3 | 0 | 0 |
| 2023 | 1.8 | 0.9 | 2 | 0 | 0 |
OSHA ITA peer cross-reference
Establishment peer ledger
238220 · MD · Frederick
5,793 Plumbers employers nationwide with a credible TCR · 7,213 rated employers in Maryland with headcount on file · 267 employers in Frederick, MD · 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 | Corporate Office | 2.1 TCR |
| NAICS-TCR | IES Santa Rosa | 2.1 TCR |
| NAICS-TCR | Holt Mechanical | 2.1 TCR |
| NAICS-TCR | Hussung Mechanical Contractors, Inc. | 2.1 TCR |
| STATE-SIZE | ISE America, Inc. - MD | 129 FTE |
| STATE-SIZE | NPL East LLC - Maryland | 129 FTE |
| STATE-SIZE | 2848 LOWE S OF NORTH EAST MD | 129 FTE |
| STATE-SIZE | 2505 DUNDALK | 129 FTE |
| CITY-NEAR | MD-03 | 4,250 FTE |
| CITY-NEAR | AstraZeneca Frederick Manufacturing Center | 775 FTE |
| CITY-NEAR | AstraZeneca Frederick Manufacturing | 711 FTE |
| CITY-NEAR | Thermo Fisher Scientific Frederick, MD (BID - Executive Way) | 568 FTE |
| NAT-TCR | Argus Construction Corp. | 2.1 TCR |
| NAT-TCR | Kettler International | 2.1 TCR |
| NAT-TCR | JWP Secondary School | 2.1 TCR |
| NAT-TCR | Northern Lakes Community Mental Health Authority | 2.1 TCR |
| NAT-SIZE | Fullford Electric, Inc | 129 FTE |
| NAT-SIZE | Thompson Denver | 129 FTE |
| NAT-SIZE | Andersen Construction Company, LLC Portland | 129 FTE |
| NAT-SIZE | Sefar Inc. | 129 FTE |
Rel codes: NAICS-TCR · STATE-SIZE · CITY-NEAR · NAT-TCR/NAT-SIZE cross-state. Read with this employer →
Read our methodology - how this data is sourced, computed, and verified.