Optical Instrument and Lens Manufacturing · Connecticut

Ct135 Zygo Corporation

Name: Ct135 Zygo Corporation Workplace Safety Data
Creator: PlainSafetyScore
License: https://creativecommons.org/publicdomain/zero/1.0/

Middlefield, CT · ~371 workers · 2 years of OSHA Injury Tracking Application data.

Compiled by PlainSafetyScore · August 25, 2026

A
Excellent Safety Record: 0.3
Avg TCR: 3.3
Industry avg: 0
Fatalities

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The verdict

Ct135 Zygo Corporation runs at 8% of its industry's injury rate - far safer than the typical Optical Instrument and Lens Manufacturing workplace, earning a grade A.

Ct135 Zygo Corporation: 0.3 TCR = 8% of Optical Instrument and Lens Manufacturing BLS 3.3 · 2y Form 300A (see methodology below)

Ct135 Zygo Corporation safety composite

Ct135 Zygo Corporation scores strongest on total case rate (tcr) (safer than 97% of same-industry peers) and weakest on fatalities (safer than 50%), 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).

70/100

Percentile-weighted across 3 of 3 measures

Total Case Rate (TCR): A 0.28 per 100 workers

Safer than 97% of industry peers
DART rate: D 0.27 per 100 workers

Safer than 52% of industry peers
Fatalities: D 0

Safer than 50% 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%).

Ct135 Zygo Corporation held a steady TCR band

Ct135 Zygo Corporation's TCR held near 0.0 from 0.3 in 2023 to 0.3 in 2024. Peak filing year was 2023 at 0.3 TCR. In 2024, DART was 0.96× this establishment's average TCR (severity share of cases).

2023=0.3 · 2024=0.3

OSHA ITA Form 300A scorecard

Establishment book 333314 · Middlefield, CT AT/BELOW-IND · MID

Grade A · TCR 0.3 · 8% of ind

DART 0.3 DART
RANK #1/5
PHOTO 2967-NJ101
BOOK 2y book
INJ 2 inj
SIZE ~371 FTE

Nearest TCR peer: 2967-NJ101 (0.0 TCR gap)

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

This site

0.3
2967-NJ101

0.3
Materion - Wes

0.3
Pyramid Case C

0.3
Materion - Wes

0.2

What this shows Ct135 Zygo Corporation averages 0.3 TCR (8% of the Optical Instrument and Lens Manufacturing BLS benchmark).

Ct135 Zygo Corporation TCR series: 2023=0.3 · 2024=0.3 · BLS 3.3

Where Ct135 Zygo Corporation falls in its industry

145 Optical Instrument and Lens Ma establishments

Safer than 97% of graded establishments in this industry, whose median TCR is 1.8.

Grade A

More dangerous than peersSafer than peers

Narrower to Connecticut alone (the establishments it most directly competes with for workers and contracts): ranked #1 safest of 5 Optical Instrument and Lens Ma employers in Connecticut.

Ct135 Zygo Corporation (371 employees, TCR 0.3) among 29 same-industry peers, split at the industry median of 80 employees and a TCR of 1.8

Ct135 Zygo Corporation has more employees than the Optical Instrument and Lens Manufacturin median and a lower injury rate than the industry's median TCR of 1.8. 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
2024	0.3	0.3	1	0	0
2023	0.3	0.3	1	0	0

OSHA ITA peer cross-reference

Establishment peer ledger

333314 · CT · Middlefield

145 Optical Instrument and Lens Manufacturing employers nationwide with a credible TCR · 7,008 rated employers in Connecticut with headcount on file · 6 employers in Middlefield, CT · 4 cross-state NAT-TCR peers · 4 cross-state NAT-SIZE peers. Closest matches by relationship code are listed below.

Rel	Establishment	Place	Metric
NAICS-TCR	2967-NJ101	WAYNE, NJ	0.3 TCR
NAICS-TCR	Materion - Westford Tyngsboro	TYNGSBORO, MA	0.3 TCR
NAICS-TCR	Pyramid Case Co., Inc.	PROVIDENCE, RI	0.3 TCR
NAICS-TCR	Materion - Westford 2 Lyberty	WESTFORD, MA	0.2 TCR
STATE-SIZE	NORTH HAVEN	NORTH HAVEN	372 FTE
STATE-SIZE	Rushford Center Inc	MERIDEN	372 FTE
STATE-SIZE	UNFI Dayville	DAYVILLE	369 FTE
STATE-SIZE	WM 2282	EAST WINDSOR	369 FTE
CITY-NEAR	2967-CT135	Middlefield	312 FTE
CITY-NEAR	Powder Ridge Mountain Park & Resort	Middlefield	251 FTE
CITY-NEAR	Acranom Masonry Enterprises	Middlefield	65 FTE
CITY-NEAR	Town Of Middlefield Ct	Middlefield	57 FTE
NAT-TCR	JACOR Contracting, Inc.	Kansas City, MO	0.3 TCR
NAT-TCR	B&M Painting co. llc	Camden, AR	0.3 TCR
NAT-TCR	Bagby & Russell Electric Company	Theodore, AL	0.3 TCR
NAT-TCR	New Alternatives for Children, Inc.	New York, NY	0.3 TCR
NAT-SIZE	Poplar Bluff	Poplar Bluff, MO	371 FTE
NAT-SIZE	Amazon.com Services LLC - SOH3	Lockbourne, OH	371 FTE
NAT-SIZE	Construction	Houston, TX	371 FTE
NAT-SIZE	MedVet Columbus	Worthington, OH	371 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. 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.