Safety Incidents OSHA Severe Injury Reports · 2015–2025
5,189,992Inspections Most recent open 2026-07-18 Last loaded 2026-07-22

OSHA Inspection: MUELLER STREAMLINE CO.

Federal Agency inspection · Safety discipline

On , OSHA opened a federal Agency safety inspection of MUELLER STREAMLINE CO. in 4190 EAST SANTA ANA STREET, ONTARIO, CA 91761 (NAICS 484121). OSHA activity number 348474057.

What this inspection record means

OSHA opens inspections for many reasons — routine scheduling under a national or local emphasis program, an employee complaint or referral, or a follow-up after a reported injury. Opening or conducting an inspection is not itself an allegation or a finding that this employer broke any rule; any findings appear as the citations listed below, and citations can be contested, reduced, or withdrawn.

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Site address
4190 EAST SANTA ANA STREET
City
ONTARIO
State
CA
ZIP
91761
Mailing
4190 EAST SANTA ANA STREET, ONTARIO, CA 91761
Inspection type
Federal Agency (M)
Scope
Partial (B)
Discipline
Safety
Advance notice
No
Union status
B
Opened
Closing conference
Case closed
Last modified
Data loaded
NAICS code
484121
Employees
101
Ownership type
A

No citations on file for this inspection — so there is no finding of any violation on this record. An inspection can be open and still ongoing, or closed with no violations at all; OSHA's citation feed is also backfilled in rolling windows, so citation rows for a very recent inspection may not have been ingested yet.

This record is reproduced from the U.S. Department of Labor Open Data API (OSHA inspection dataset). The original IMIS detail view is available at OSHA's Establishment Search for activity number 348474057.

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