Mobile DOT & Non-DOT Drug Testing in St. Clair and Madison County, IL
We provide on-site drug testing at your location, for convenience and compliance
We provide on-site drug testing at your location, for convenience and compliance

CR Lab Services is a mobile certified drug testing provider, focusing on workplace safety through DOT and non-DOT drug testing . Led by Cassandra, a Registered Nurse with over 30 years of experience. Our services are delivered with professionalism, confidentiality, and integrity. With a strong clinical background, I ensure a reliable and trustworthy testing process while maintaining the highest standards of care.

At CR Lab Services, our mission is to provide accurate, reliable, and professional drug testing solutions that support workplace compliance and safety. Guided by the values of integrity and care, we strive to deliver services with the expertise of a registered nurse, ensuring employers meet regulatory standards while fostering healthier, drug-free environments.
Onsite Testing
We come directly to your workplace for DOT and non-DOT specimen collections, so employees don’t have to leave work or spend time traveling to a clinic or lab.
Certified & Compliant
All collections meet DOT 49 CFR Part 40 standards and follow strict chain-of-custody procedures.
Mobile & Flexible Hours
Offering after-hours, weekend, and emergency testing for your convenience.
Reduced Downtime
Keep your business running smoothly with efficient, on-location testing that minimizes disruption.
Tamper-Resistant Procedures
Onsite collection limits the chance for adulterated or substituted specimens.
Professional Service by a Registered Nurse
Over 30 years of nursing experience ensures accuracy, confidentiality, and care.
Serving Employers & Transportation Professionals
Supporting trucking, staffing, and corporate industries.
Fast & Reliable Results
Quick lab turnaround times and prompt reporting keep your business moving forward.

👔 Employers & HR Departments
Maintain a safe, drug-free workplace with DOT and Non-DOT testing for pre-employment, random, post-accident, and return-to-duty situations. CR Lab Services helps keep your company compliant and your employees protected.
🚛 Transportation & Logistics Companies
Ensure DOT compliance and protect your drivers with our fast, accurate, and federally regulated drug testing services. We specialize in mobile and on-site collections designed for your industry’s safety-sensitive requirements.
🏥 Healthcare Facilities & Staffing Agencies
Support your hiring and credentialing process with reliable pre-employment and random drug screening. We help you meet hospital, clinic, and agency compliance standards with professional and confidential testing.

⚖️ Probation & Court-Ordered Clients
We provide timely, accurate, and confidential drug testing for court-ordered, probation, or diversion programs. Results are processed quickly to meet your reporting and compliance requirements.
🎓 Schools, Sports, & Community Programs
Encourage accountability and safety among students and participants with random or scheduled drug testing. We work with schools and organizations to support a healthy, drug-free environment.
📍 Serving St. Clair & Madison County, IL
CR Lab Services proudly provides professional, compliant, and mobile drug testing solutions to employers, agencies, and individuals throughout St. Clair County and Madison County, Illinois.
💼 Pre-Employment Testing
Done before hiring to make sure new employees are drug-free before starting work.
🎯 Random Testing
Unannounced testing for current employees to help keep the workplace safe and drug-free.
🧠 Reasonable Suspicion Testing
Used when a supervisor sees signs or behavior that an employee might be under the influence.
🚨 Post-Accident Testing
Given after a workplace accident to find out if drugs or alcohol were involved.
🔁 Return-to-Duty Testing
Done before an employee returns to work after a failed test or policy violation.
📅 Follow-Up Testing
Testing done over time after an employee returns to work to make sure they stay drug-free.
📋 Schedule a Test
Fast, confidential DOT & Non-DOT drug testing — on-site or mobile.
We bring the lab to you for convenience and compliance.
📞 Call or Text: 866-992-7976
✉️ Email: contact@crlabservices.com
✅ Same-day appointments available
✅ Mobile & on-site collections
✅ Certified specimen collectors
> Serving employers, transportation, healthcare, court-ordered, and community clients across St. Clair & Madison Counties.
Submit a Request.
Mon | 10:00 am – 05:00 pm | |
Tue | 10:00 am – 05:00 pm | |
Wed | 10:00 am – 05:00 pm | |
Thu | 10:00 am – 05:00 pm | |
Fri | 10:00 am – 05:00 pm | |
Sat | 10:00 am – 02:00 pm | |
Sun | Closed |
Emergency Testing 24/7. Emergency and after-hour testing available . Additional fees may apply.
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CR Lab Services is committed to maintaining the highest standards of accuracy, integrity, and confidentiality.
Our services comply with all DOT and Non-DOT federal testing regulations (49 CFR Part 40) to ensure workplace safety and legal reliability.
We follow strict collection protocols, privacy practices, and ethical procedures for every client and donor.
To learn more about our compliance and company guidelines, please review our official policies below:
We respect your privacy and protect your personal information.
Any data collected through CR Lab Services (including contact forms, scheduling, or messaging) is used only for business and communication purposes.
We do not sell, trade, or share personal information with third parties without consent, except when required by law or for DOT compliance verification.
By using our website or contacting CR Lab Services, you agree to our terms and conditions.
All testing and collection services are performed under state and federal compliance guidelines.
We reserve the right to update our policies, pricing, and terms at any time.
Continued use of our website or services means you accept any updated terms.
CR Lab Services uses RingCentral for secure business messaging and communication.
By contacting us through phone, text, or email, you consent to receive messages related to appointments, confirmations, and service updates.
Message and data rates may apply depending on your carrier.
You can opt out of text communications at any time by replying STOP.
We will never share your phone number or message content with outside parties.
CR Lab Services complies with all applicable DOT and Non-DOT regulations, including confidentiality, secure record handling, and workplace safety standards.
We ensure proper chain of custody for every specimen collected, maintain all required documentation, and partner only with certified laboratories and MROs (Medical Review Officers).
Our goal is to ensure accuracy, compliance, and trust in every test we perform.
CR Lab Services – Mobile Drug Testing
Providing professional DOT & Non-DOT specimen collection and workplace
compliance services.
📞 866-992-7976
📧 contact@crlabservices.com
🌐 www.crlabservices.com
Registered Nurse Owned & Operated • Certified DOT / Non-DOT Specimen Collector
Committed to Workplace Safety & Compliance
Privacy Policy | Terms of Service | Compliance Statement
© 2025 CR Lab Services. All rights reserved.
Bringing the lab to you – the one you can trust.
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