CAL FIRE · California

Southern Region : Mmu

Mariposa, CA · ~478 workers · 6 years of OSHA Injury Tracking Application data.

F
Failing Safety Record
21.5
Avg TCR
3.2
Industry avg
1
Fatality
Subscribe to safety-record updates (RSS)

The verdict

Southern Region : Mmu runs at 672% of its industry's injury rate - far more dangerous than the typical CAL FIRE workplace, earning a grade F.

Southern Region : Mmu: 21.5 TCR = 672% of CAL FIRE BLS 3.2 · 6y Form 300A (see methodology below)

Southern Region : Mmu safety composite

Southern Region : Mmu scores strongest on total case rate (tcr) (safer than 8% of same-industry peers) and weakest on fatalities (safer than 3%), 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).

F

5/100

Percentile-weighted across 3 of 3 measures

Total Case Rate (TCR)
F 21.5 per 100 workers

Safer than 8% of industry peers

DART rate
F 25.19 per 100 workers

Safer than 4% of industry peers

Fatalities
F 1

Safer than 3% 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

Southern Region : Mmu: 12.3 → 25.2 TCR

Peak year 2022 @ 37.8 TCR · DART/TCR 1.17× in 2023

Southern Region : Mmu's TCR rose 12.9 from 12.3 in 2017 to 25.2 in 2023. Peak filing year was 2022 at 37.8 TCR. In 2023, DART was 1.17× this establishment's average TCR (severity share of cases).

OSHA ITA Form 300A scorecard

Establishment book 922160 · Mariposa, CA ABOVE-IND · MID

Grade F · TCR 21.5 · 672% of ind

  • DART 25.2 DART
  • RANK #61/87
  • PHOTO Citizens Fire Depart…
  • BOOK 6y book
  • INJ 223 inj
  • SIZE ~478 FTE

Nearest TCR peer: Citizens Fire Department (0.0 TCR gap)

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

Southern Region : Mmu in the TCR neighbourhood

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

TCR

What this shows Southern Region : Mmu averages 21.5 TCR (672% of the CAL FIRE BLS benchmark).

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

Southern Region : Mmu TCR series: 2017=12.3 · 2019=9.6 · 2020=20.1 · 2021=24.1 · 2022=37.8 · 2023=25.2 · BLS 3.2

Where Southern Region : Mmu falls in its industry

793 CAL FIRE establishments

Safer than 8% of graded establishments in this industry, whose median TCR is 9.8.

More dangerous than peersSafer than peers

Narrower to California alone (the establishments it most directly competes with for workers and contracts): ranked #61 safest of 87 CAL FIRE employers in California.

Southern Region : Mmu (478 employees, TCR 21.5) among 29 same-industry peers, split at the industry median of 54 employees and a TCR of 9.8 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 0102030 Average employees Total Case Rate Southern Region : Mmu
Southern Region : Mmu (478 employees, TCR 21.5) among 29 same-industry peers, split at the industry median of 54 employees and a TCR of 9.8

Southern Region : Mmu has more employees than the CAL FIRE median and a higher injury rate than the industry's median TCR of 9.8. 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
2023 25.2 25.2 43 6 0
2022 37.8 37.8 50 30 0
2021 24.1 24.1 42 13 0
2020 20.1 20.1 35 13 0
2019 9.6 9.2 26 1 1
2017 12.3 12.3 27 2 0

OSHA ITA peer cross-reference

Establishment peer ledger

922160 · CA · Mariposa

793 CAL FIRE employers nationwide with a credible TCR · 51,834 rated employers in California with headcount on file · 4 employers in Mariposa, CA · 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 Citizens Fire Department 21.5 TCR
NAICS-TCR Highland Township Fire Department 21.5 TCR
NAICS-TCR NORTHERN REGION : BTU 21.6 TCR
NAICS-TCR Fire Emergency Services Station 71 21.7 TCR
STATE-SIZE Schlosser Plant 1 478 FTE
STATE-SIZE Instrumentation Laboratories 478 FTE
STATE-SIZE 1645 478 FTE
STATE-SIZE 1202 - TORRANCE CA WHSE 478 FTE
CITY-NEAR Mariposa County 620 FTE
CITY-NEAR Pioneer Market Mariposa 91 FTE
CITY-NEAR Social Vocational Services #315 9 FTE
NAT-TCR Window Installation Specialists 21.5 TCR
NAT-TCR Skills4lifefl LLC 21.5 TCR
NAT-TCR Evergreen 21.5 TCR
NAT-TCR SeaQuest Las Vegas 21.5 TCR
NAT-SIZE Teays Valley Hospital 478 FTE
NAT-SIZE Thorne research - Omni one 478 FTE
NAT-SIZE Signature Medical Group 478 FTE
NAT-SIZE Cox Communications - Tulsa Main Office 478 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: 2023, 2022, 2021, 2020, 2019, 2017. 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.