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Johns Manville: OSHA inspections and violations

Willows, California · Mineral Wool Manufacturing · NAICS 327993

20inspections
37citation items
$92,975current penalties
May 15, 2026last inspection

Since 1998, OSHA inspectors have visited Johns Manville in California 20 times.

The most recent inspection opened on May 15, 2026 after a complaint, in Willows.

In all, OSHA issued 37 citation items: 8 serious and 29 other-than-serious.

The proposed penalties came to $158,730; today they stand at $92,975, 41% less.

Among manufacturing employers, the typical cited inspection since 2015 ends with a $4,500 penalty. Johns Manville averages $8,433 across 7 cited inspections.

Johns Manville also files yearly injury logs with OSHA, summarized below.

Johns Manville: OSHA citation items per year, 1998 to 2026
Citation items per year, by inspection date.

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Inspection history

Inspection 348943127 OPENED MAY 15, 2026Closed

Complaint · Partial · Health · 150 employees at the site · Closed Aug 7, 2026

5916 County Road 48, Willows, CA 95988 · Mineral Wool Manufacturing · OSHA's record · Phone and website on Google Maps

No citations from this inspection.

Inspection 346051576 OPENED JUN 28, 2022Closed

Accident · Partial · Safety · 330 employees at the site · Closed Feb 27, 2023

5916 County Rd. 49, Willows, CA 95988 · Mineral Wool Manufacturing · OSHA's record · Phone and website on Google Maps

Citation and ruleTypeProposedCurrentIssuedStatus
Citation 1, item 1
29 CFR 3314(J)
Other-than-serious$635$635Sep 8, 2022Final
Citation 2, item 1
29 CFR 3314(D)
Other-than-serious$9,560$3,000Sep 8, 2022Final
Citation 5, item 1
29 CFR 3314(L)(1)
Serious$22,500$22,500Sep 8, 2022Final

Inspection 345463103 OPENED AUG 3, 2021Closed

Complaint · Partial · Safety · 101 employees at the site · Closed Sep 29, 2021

5916 County Road 49, Willows, CA 95988 · Mineral Wool Manufacturing · OSHA's record · Phone and website on Google Maps

Citation and ruleTypeProposedCurrentIssuedStatus
Citation 1, item 1
OSH Act Section 5(a)(1) · General Duty Clause
Other-than-serious$300$300Aug 19, 2021Final

Inspection 344778121 OPENED JUN 3, 2020Closed

Accident · Partial · Safety · 287 employees at the site · Closed Mar 4, 2022

5916 County Road 49, Willows, CA 95988 · Mineral Wool Manufacturing · OSHA's record · Phone and website on Google Maps

Incident on May 14, 2020: Employee fractures ribs when struck by table

At 1:40 p.m. on May 14, 2020, an employee was working under a scissor lift style table. A coworker used a pry bar to move the table, causing the pin to lock the caster. The table fell onto the employee's chest. The LOTO procedure was ineffective. The employee suffered multiple rib fractures. The employee was hospitalized for two days.

Citation and ruleTypeProposedCurrentIssuedStatus
Citation 2, item 1
29 CFR 3314(C)
Serious$22,500$11,250Nov 13, 2020Final

Inspection 344067566 OPENED JUN 6, 2019Closed

Accident · Partial · Safety · 300 employees at the site · Closed Aug 16, 2019

5916 County Road 49, Willows, CA 95988 · Mineral Wool Manufacturing · OSHA's record · Phone and website on Google Maps

Incident on May 13, 2019: Employee injures arm when struck by metal pole

At 9:36 a.m. on May 13, 2019, an employee and his coworker were cleaning the inside of an exhaust duct. The employee was holding a flashlight shining light into the duct so the coworker could clean the duct. The coworker had not made sure the blind was inserted into the duct and as he inserted the pole to clean the duct the pole was pulled from his hands and made contact with the fan blades causing it to move erratically and strike the employee. The employee was hospitalized with a puncture wound to his right arm.

Citation and ruleTypeProposedCurrentIssuedStatus
Citation 1, item 1
29 CFR 3556(B)
Other-than-serious$475$475Jun 21, 2019Final

Inspection 343566436 OPENED OCT 24, 2018Closed

Unprogrammed related · Partial · Safety · 110 employees at the site · Closed Dec 7, 2018

5916 County Road 49, Willows, CA 95988 · Mineral Wool Manufacturing · OSHA's record · Phone and website on Google Maps

No citations from this inspection.

Inspection 343386272 OPENED AUG 8, 2018Closed

Accident · Partial · Safety · 110 employees at the site · Closed Nov 28, 2018

5916 County Rd 49, Willows, CA 95988 · Polystyrene Foam Product Manufacturing · OSHA's record · Phone and website on Google Maps

Incident on Jul 20, 2018: Employee amputates and lacerates several fingers while troub

At 8:50 a.m. on July 20, 2018, an employee was troubleshooting a fan motor that had it's guard removed. The employee has his right hand pulled into the fan motor pulley and amputated his ring finger and thumb to the first knuckle, crushed the tip of his middle finger, and lacerated his pinky. The employee was hospitalized.

Citation and ruleTypeProposedCurrentIssuedStatus
Citation 1, item 1
29 CFR 3210(C)
Other-than-serious$935$0Sep 21, 2018Final
Citation 1, item 2
29 CFR 3270(A)
Other-than-serious$935$935Sep 21, 2018Final
Citation 2, item 1
29 CFR 3314(G)(2)(A)
Other-than-serious$5,060$935Sep 21, 2018Final
Citation 3, item 1
29 CFR 3314(C)
Serious$22,500$18,000Sep 21, 2018Final

Inspection 343386660 OPENED AUG 8, 2018Closed

Complaint · Partial · Safety · 110 employees at the site · Closed Nov 28, 2018

5916 County Road 49, Willows, CA 95988 · Mineral Wool Manufacturing · OSHA's record · Phone and website on Google Maps

Citation and ruleTypeProposedCurrentIssuedStatus
Citation 1, item 1
29 CFR 3241(C)
Other-than-serious$935$600Sep 21, 2018Final
12 older inspections

Inspection 341438109 OPENED APR 29, 2016Closed

Unprogrammed related · Partial · Safety · 30 employees at the site · Closed May 11, 2017

4301 E. Firestone Blvd, South Gate, CA 90280 · Asphalt Shingle and Coating Materials Manufacturing · OSHA's record · Phone and website on Google Maps

Citation and ruleTypeProposedCurrentIssuedStatus
Citation 1, item 1
29 CFR 3328(G)
Other-than-serious$4,050$400Sep 20, 2016Final

Inspection 310494547 OPENED MAR 3, 2009Closed

Accident · Partial · Safety · 29 employees at the site · Closed Nov 30, 2009

4301 E Firestone Bl, South Gate, CA 90280 · Asphalt Paving Mixture and Block Manufacturing · OSHA's record · Phone and website on Google Maps

Incident on Feb 24, 2009: Employee amputates finger in machine

At approximately 11:03 a.m. on February 24, 2009, an employee was adjusting roof ing material to allow the roll winder machine to continue rolling the roofing ma terial. The machine that the employee was working on was a left hand ejected ele ctric drive roll winder and core inserter manufactured by Reichel and Drews Inc. The employee suffered an amputation to the distal phalanx of his right ring fin ger. The cause of the accident was due to improper guarding of the roll winder m achine he was working on. It was determined that there had been a power surge in which production was briefly interrupted. This caused the material in the produ ction line to sink into the cooling water. The wet material caused winding issue s and moved the roofing material out of alignment because of its wet state. At t his point, the employee had switched the machine into manual mode to adjust the material. While adjusting the material, the role winder started, causing the apr on, guiding plate, to pinch his right hand between it and the spindle. The emplo yee was hospitalized and treated for a finger amputation.

Citation and ruleTypeProposedCurrentIssuedStatus
Citation 1, item 1
29 CFR 342 A
Other-than-serious$5,000$0May 19, 2009Final
Citation 2, item 1
29 CFR 4075 A
Serious$5,060$270May 19, 2009Final
Citation 3, item 1
29 CFR 4184 B
Serious$18,000$18,000May 19, 2009Final

Inspection 125820324 OPENED APR 2, 2007Closed

Complaint · Partial · Safety · 335 employees at the site · Closed Sep 4, 2008

5916 County Road 49, Willows, CA 95988 · Mineral Wool Manufacturing · OSHA's record · Phone and website on Google Maps

Incident on Nov 8, 2006: Employee's fingers are amputated by conveyor

On November 8, 2006, Employee #1 was working in the finishing department of a fi ber glass manufacturing plant. When he reached to pull a piece of scrap from the main conveyor line, his glove became caught between the edge of the belt and a pulley. The tips of Employee #1's left middle and ring fingers were amputated.

Citation and ruleTypeProposedCurrentIssuedStatus
Citation 1, item 1
29 CFR 342 A
Other-than-serious$5,000$150Jul 16, 2007Final

Inspection 309367480 OPENED MAR 29, 2006Closed

Complaint · Partial · Health · 100 employees at the site · Closed May 26, 2006

5916 County Road 49, Willows, CA 95988 · Mineral Wool Manufacturing · OSHA's record · Phone and website on Google Maps

No citations from this inspection.

Inspection 125829705 OPENED MAR 30, 2005Closed

Accident · Partial · Safety · 346 employees at the site · Closed Aug 15, 2005

5916 County Road 49, Willows, CA 95988 · Mineral Wool Manufacturing · OSHA's record · Phone and website on Google Maps

Incident on Mar 15, 2005: Employee amputates finger while changing rolls of tape

On March 15, 2005, Employee #1, a packaging operator for an employer who manufac turers fiber glass insulation, was changing rolls of tape on a taping machine. A s Employee #1 observed a jammed roll and placed the machine into manual feed mod e, she proceeded to change the role. Her finger became caught in the machine, re sulting in the amputation of her right middle finger. Employee #1 was hospitaliz ed and treated for her injury. The accident investigation revealed that Employee #1 had been trained and was following the employers set procedures.

No citations from this inspection.

Inspection 125718338 OPENED NOV 20, 2003Closed

Accident · Partial · Safety · 400 employees at the site · Closed Apr 1, 2004

5916 County Road 49, Willows, CA 95988 · Mineral Wool Manufacturing · OSHA's record · Phone and website on Google Maps

Incident on Oct 30, 2003: Employee is found unconscious

Employee #1 was observed laying on the floor, unconscious and with a small ladde r that he had pulled onto himself. Employee #1 was taken by ambulance to the hos pital where it was determined he had a nonwork-related personal medical problem.

No citations from this inspection.

Inspection 300739687 OPENED APR 10, 2003Closed

Programmed other · Partial · Health · 25 employees at the site · Closed Aug 7, 2003

420 East 3rd St, Pittsburg, CA 94565 · Asphalt Shingle and Coating Materials Manufacturing · OSHA's record · Phone and website on Google Maps

No citations from this inspection.

Inspection 125736249 OPENED JUN 18, 2001Closed

Planned · Partial · Health · 70 employees at the site · Closed Jul 9, 2001

420 E. 3rd St., Pittsburg, CA 94565 · OSHA's record · Phone and website on Google Maps

No citations from this inspection.

Inspection 120222344 OPENED DEC 7, 2000Closed

Planned · Partial · Health · 192 employees at the site · Closed Dec 9, 2002

1251 Magnolia Avenue, Corona, CA 91719 · OSHA's record · Phone and website on Google Maps

Citation and ruleTypeProposedCurrentIssuedStatus
Citation 1, item 1
29 CFR 461 A
Other-than-serious$450$0Feb 2, 2001Final
Citation 1, item 2
29 CFR 470 A
Other-than-serious$450$450Feb 2, 2001Closed
Citation 1, item 3
29 CFR 3214 A
Other-than-serious$225$150Feb 2, 2001Final
Citation 1, item 4
29 CFR 5143 A05
Other-than-serious$335$225Feb 2, 2001Final
Citation 1, item 5
29 CFR 5157 C02
Other-than-serious$675$0Feb 2, 2001Final
Citation 1, item 6
29 CFR 5157 C07 C
Other-than-serious$675$450Feb 2, 2001Final
Citation 1, item 7
29 CFR 5157 D01
Other-than-serious$675$450Feb 2, 2001Final
Citation 1, item 8
29 CFR 5157 F
Other-than-serious$675$450Feb 2, 2001Final
Citation 1, item 9
29 CFR 5157 C05 B3
Other-than-serious$675$450Feb 2, 2001Final
Citation 1, item 10
29 CFR 5157 G01
Other-than-serious$675$450Feb 2, 2001Final
Citation 1, item 11
29 CFR 5157 K02
Other-than-serious$675$450Feb 2, 2001Final
Citation 1, item 12
29 CFR 480 B
Other-than-serious$675$450Feb 2, 2001Final
Citation 1, item 13
29 CFR 5217 D01 D
Other-than-serious$450$450Feb 2, 2001Final
Citation 2, item 1
29 CFR 472 B
Serious$8,100$2,700Feb 2, 2001Final
Citation 3, item 1
29 CFR 5167 D
Serious$10,125$6,750Feb 2, 2001Final
Citation 4, item 1
29 CFR 450 A01
Serious$8,100$0Feb 2, 2001Final

Inspection 125860502 OPENED AUG 10, 2000Closed

Complaint · Partial · Health · 232 employees at the site · Closed Feb 1, 2001

1251 Magnolia Ave, Corona, CA 91719 · OSHA's record · Phone and website on Google Maps

Citation and ruleTypeProposedCurrentIssuedStatus
Citation 1, item 1
29 CFR 5217 O01
Other-than-serious$300$300Nov 3, 2000Closed
Citation 1, item 2
29 CFR 5217 E01
Other-than-serious$300$300Nov 3, 2000Closed

Inspection 120240924 OPENED DEC 9, 1999Closed

Accident · Partial · Safety · 255 employees at the site · Closed Feb 22, 2000

1251 Magnolia Ave, Corona, CA 91719 · OSHA's record · Phone and website on Google Maps

Citation and ruleTypeProposedCurrentIssuedStatus
Citation 1, item 1
29 CFR 4184 B
Other-than-serious$450$450Jan 7, 2000Closed

Inspection 120250881 OPENED SEP 18, 1998Closed

Accident · Partial · Safety · 250 employees at the site · Closed May 9, 2003

1251 Magnolia Ave, Corona, CA 91719 · OSHA's record · Phone and website on Google Maps

Incident on Aug 25, 1998: Employee's fingertip amputated by jacket machine knife

Employee #1 was using an automatic jacket machine to apply surface material and tape to round fiberglass pipe insulation. The tape jammed at the location of a p neumatically operated knife that cut it into pre-programmed lengths. Employee #1 was manually feeding in the tape when the knife cycled, amputating the tip of h is finger.

Citation and ruleTypeProposedCurrentIssuedStatus
Citation 1, item 1
29 CFR 342 A
Other-than-serious$300$300Nov 6, 1998Final
Citation 1, item 2
29 CFR 342 A
Other-than-serious$300$300Nov 6, 1998Final

Injury and illness logs

From the Form 300A summaries employers file with OSHA each year. Rate = recordable cases per 100 full-time workers.

In 2025, the Willows site logged 0 recordable injuries or illnesses among about 365 workers: 0.0 per 100 full-time workers, against a median of 2.6 for its industry.

Site and yearWorkersCasesDays-away casesRateIndustry median
Willows site
Willows · 2025
365 000.02.6
South Gate site
South Gate · 2025
36 000.00.6

The rules behind these citations

Current text from the Code of Federal Regulations. Some citations were issued under older wording.

OSH Act Section 5 · General Duty Clause

OSH Act Section 5(a)(1)

Each employer shall furnish to each of his employees employment and a place of employment which are free from recognized hazards that are causing or are likely to cause death or serious physical harm to his employees.

Other mineral wool manufacturing employers in California

Source: U.S. Department of Labor, OSHA enforcement data. A citation is OSHA's allegation; employers can contest it, and the status column shows where each item stands. Something wrong on this page? Tell us.