THERMA-STOR LLC is a power boiler and heat exchanger manufacturing employer in MADISON, WI. Federal records show 1 OSHA inspection with 1 violation and $800 in penalties. All data sourced from public federal enforcement records.

Data sourced from OSHA, DOL WHD, MSHA, EPA ECHO, NLRB, FMCSA, OFLC, BLS, SAM.gov, CMS, USAspending, CPSC, NHTSA, and the UVA Corporate Prosecution Registry. Last updated: May 1, 2026.

THERMA-STOR LLC

4201 LIEN ROAD, MADISON, WI, 53704

332410 — Top companies in Power Boiler and Heat Exchanger Manufacturing

EIN: 352609097

352 employees

Federal Enforcement

OSHA inspection

1 violation

$800 in penalties

Violations across 2 federal agencies

Enforcement actions from multiple agencies may indicate systemic compliance issues.

Industry Benchmark

Industry Avg TRIR

3.2

Industry Avg DART

1.5

Self-Reported DART

0.8

Self-Reported TRIR

2.5

Industry rates from BLS SOII 2024. Self-reported rates from OSHA ITA Form 300A (employer self-reported).

OSHA Inspections

OSHA Violations

Total Penalties

$800

Trend

STABLE

WHD Cases

Back Wages Owed

Confidence

MEDIUM

SVEP Flag

Data Insights

History Span

16 years

Last Activity

16yr ago

Inspection Rate

0.1/yr

Violation Rate

0.1/yr

Violation Severity Mix

100% serious$800 avg per violation$800 avg per inspection

Active Agencies:

OSHANLRB$800 total across all agencies

TRIR vs Industry Avg

-0.7

Below industry average

DART vs Industry Avg

-0.7

Below industry average

Inspection Breakdown

Referral

Complaint and accident-triggered inspections are stronger risk signals than routine planned inspections.

Violation rate: 100% of inspections

Peer Comparison

41%

Below average violations

vs 75 employers in same industry & state

Fewer violationsMore violations

Penalty Percentile

51%

Labor Relations (NLRB)

Total Cases

Unfair Labor Practice

National Labor Relations Board — unfair labor practice charges and union representation cases.

Motor Carrier Safety (FMCSA)

DOT Number

2163443

Operation Type

Federal Motor Carrier Safety Administration — DOT-regulated carrier registration and fleet data.

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Inspection History

No inspection records found.

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More employers in this state: Wisconsin workplace enforcement data →

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Data aggregated from public federal enforcement and program records (OSHA, WHD, MSHA, EPA, NLRB, FMCSA, OFLC, BLS, SAM.gov, CMS, USAspending, CPSC, NHTSA) plus the UVA Corporate Prosecution Registry. Employer profiles matched by name and location — matching errors may occur. Risk scores computed by FastDOL, not official government assessments. OSHA citations typically appear 3-8 months after the inspection, so very recent enforcement actions may not yet be reflected. Data provided as-is. Report a data error.

Other employers in Power Boiler and Heat Exchanger Manufacturing within WI

GENERAL THERMODYNAMICS, INC. — IRON RIDGE — 2 federal records
CHART ENERGY & CHEMICALS, INC. — LA CROSSE — 1 federal record
THERMASYS CORPORATION — IRON RIDGE — 1 federal record
PAGET EQUIPMENT COMPANY — MARSHFIELD — 1 federal record
ENERQUIP, INC. — MEDFORD — 1 federal record
PRE-HEAT INC. — OOSTBURG — 1 federal record
INDUSTRIAL HEAT TRANSFER, INC. — COON VALLEY — 1 federal record
MODINE MANUFACTURING COMPANY — RACINE — 1 federal record
ADVANCE BOILER & TANK CO., LLC — WEST ALLIS — 1 federal record
PBBS EQUIPMENT CORPORATION — OCONOMOWOC — 1 federal record

Industry context

Within the power boiler and heat exchanger manufacturing industry in WI, THERMA-STOR LLC ranks in the 41th percentile of OSHA violation frequency across 75 comparable establishments.

OSHA penalty totals rank in the 51th percentile of the same peer group.

The Bureau of Labor Statistics reports an industry-average Total Recordable Incident Rate (TRIR) of 3.2 for the power boiler and heat exchanger manufacturing sector, with a Days Away, Restricted, or Transferred (DART) rate of 1.5. THERMA-STOR LLC's self-reported DART rate is 0.75, which is below the industry average.

Activity timeline

No federal enforcement activity has been recorded against this establishment in the past 16 years.

Frequently Asked Questions

What is THERMA-STOR LLC's OSHA violation history?: THERMA-STOR LLC has 1 OSHA inspection on record with 1 violation and $800 in total penalties.
How does THERMA-STOR LLC's safety record compare to its industry?: THERMA-STOR LLC operates in the power boiler and heat exchanger manufacturing industry. The industry average Total Recordable Incident Rate (TRIR) is 3.2. THERMA-STOR LLC's self-reported DART rate is 0.75 compared to an industry average of 1.5.

About this data

This profile aggregates federal enforcement records on THERMA-STOR LLC of MADISON, WI from 17 federal data sources. Records were found in 4 sources: OSHA workplace safety inspections, NLRB labor relations cases, FMCSA motor carrier safety, and BLS industry safety benchmarks. The remaining 13 sources were checked and found no matching records: WHD, MSHA, EPA, OFLC, OFCCP, USAspending, SAM.gov, CMS, CPSC, NHTSA, UVA, SEC enforcement, SEC facts.

Establishments are matched across agencies using normalized employer name, state, and ZIP code. The dataset was last refreshed on May 1, 2026.

This profile may be incomplete if THERMA-STOR LLCoperates under multiple legal names, files under variations our entity-matching rules don't yet cover, or maintains records below current matching thresholds. To report a missing record or correction, email corrections@fastdol.com.