Urine Specimens of DOT and safety sensitive personnel are analyzed only by CLIA certified labs!

Employee Workplace Drug Testing: DOT-regulated and non-DOT Employees.

We Drug Test In All U.S. Cities, In All 50 States. We Drug Test Onsite Nationwide, Too!

Employee workplace drug testing is our core business since 1991. In 2022, we continue to serve our very first 1991 client! Our drug testing clients include workplaces with just 2-3 employees and multiple workplaces nationally with 30,000+ employees.


Nationwide, OHS Inc. provides the standard six (6) drug tests required for all USDOT-REGULATED employees. Pre-employment, Random, Reasonable Suspicion, Post-Accident, Return-to-Duty and Follow-Up Drug Tests. These maintain a solid Drug-Free Workplace for NON-DOT personnel, too!

The WorkFit System℠ Reduces the frequency of Workplace Injuries, and therefore lowers your total cost of Workers' Compensation claims.

Reduce the Frequency of Your Workers' Compensation Claims!

On-the-Job injuries ARE CUT BY 50% OR MORE!
Workers' Comp Claims ARE CUT BY 50% OR MORE!

Our Field-Proven strategy REDUCES the number of your on-the-job injuries! The WorkFit System℠ physical evaluation helps you determine a candidate's job fitness- in advance of placement! Are your candidates PHYSICALLY FIT to perform the essential functions of the job without injuring themselves?


The WorkFit System℠ helps prevent employee workplace injuries before they happen! WorkFit℠ reduces the majority of workplace injuries caused by "pre-existing conditions". This reduces the Workers' Compensation claims against your company! WorkFit℠ definitely works "as advertised" here!

OHS provides DOT Supervisor Training Online

Supervisor Training for Reasonable Suspicion Drug Testing. A Safety Must-Do!

DOT Reasonable Suspicion Training & Certification is Taught Online 24/7!

Supervisor Training is fully DOT-compliant! We strongly recommended this training for ALL supervisors of non-DOT personnel, too! "Reasonable Suspicion" training about drug and alcohol abuse is a federal requirement for all supervisors of DOT-regulated personnel.


"Reasonable Suspicion" training online at its very best, most convenient, and most cost-effective for companies to help ensure WORKPLACE SAFETY. As well, this is invaluable training for ALL non-DOT regulated company supervisors, managers, and department heads!

OHS provides respirator exams and certifications online in English and in Spanish!

OSHA-Required Respirator Exam and Certification. Quick and easy to do!

OSHA-Compliant Exam to Certify is Accessible Online 24/7!

OSHA-compliant exam in either English or Spanish, is online anytime, 24/7! Federal OSHA standard 1910.134 requires a medical survey of all employees that use a respirator in the workplace. That's even if that use is necessary only "just occasionally".


Respirator Exam/Certification takes 7-9 minutes to complete online. This program is one of multiple workplace safety services OHS Inc. provides companies throughout the U.S.A. and Canada. One provider, one invoice- OHS Inc. can help make your life very simple!

The USA, Canada, and OHS Inc.

In the USA and Canada, OHS Inc. serves more than 1,700 small and large companies. Yet, we treat each and every one of them as our "#1" client. You will absolutely love our customer service!

Our Mission Statement since 1991 continues today in 2022. "OHS Inc. will endeavor to earn our clients' loyalty year-after-year by providing them with exceptional service day-after-day." Thanks to an outstanding customer service team! We provide drug testing and other workplace safety services throughout all 50 U.S. states and Canada. We do so with a strong, professional commitment. That is, to ensure your employees are drug-free. To reduce the number of your employee injuries, and to improve safety and health in your workplace overall!

Our Two Community Service Programs

OHS Inc. cares about our community and keeping local families drug-free. So, we help families where it counts the most. It includes our unique "Youth at Risk" ("YAR") and "Parents Taking Action" (PTA) Programs!

According to the National Institute on Drug Abuse, by senior year, almost 70% of high schoolers have tried alcohol. FULLY 50% have tried an illegal drug. OHS Inc. provides random drug testing at our cost to parents who bring their children to our Costa Mesa offices. Testing children randomly strongly helps them to resist today's tougher-than-ever peer pressure, "I can't! My parents drug test me!"). Learn why it's never too early to begin testing, and let us help you!

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