✓ Same-Day Walk-Ins Welcome ✓ Digital Donor Pass in Minutes ✓ No Doctor Order Required ✓ SAMHSA-Certified Labs

Drug Testing Locations in O'fallon, MO

With 30 testing centers in the O'fallon area, we offer drug and alcohol testing for employment, probation and DOT requirements. Additional services include DOT consortium enrollment, DNA Testing and background checks. Order your tests and services online or call (800) 221-4291.

Urine (5, 10, 12, 14-Panel) Hair Follicle (90-Day) DOT Drug & Alcohol Court & Probation Oral Fluid / Saliva EtG Alcohol
🕑 Collection Site Hours: Monday – Friday: 8:00 AM – 4:00 PM • ✓ Walk-in with Electronic Donor Pass • Saturday – Sunday: Closed

30 Drug-Testing Centers in O'fallon

Same-Day Electronic Donor Pass Accepted at All Locations Below

Minutes Away, Test Today

300 Winding Woods Dr Ste 100

0.57 mi
🕑 Testing Hours: Mon–Fri: 8:00 AM-5:00 PM✓ Walk-in with Electronic Donor Pass
300 Winding Woods Dr Ste 100
O Fallon, MO 63366

2967 Highway K

1.10 mi
🕑 Testing Hours: Mon–Fri: 7:00 AM-6:00 PM • Sat: 8:00 AM-12:00 PM✓ Walk-in with Electronic Donor Pass
2967 Highway K
O Fallon, MO 63368

4 Abington Ct

1.96 mi
🕑 Testing Hours: Mon–Fri: 8:00 AM-5:00 PM✓ Walk-in with Electronic Donor Pass
4 Abington Ct
St. Peters, MO 63376

5551 Winghaven Blvd Ste 100

2.28 mi
🕑 Testing Hours: Mon–Fri: 8:00 AM-5:00 PM✓ Walk-in with Electronic Donor Pass
5551 Winghaven Blvd Ste 100
O Fallon, MO 63368

1901 Trade Center Dr

2.77 mi
🕑 Testing Hours: Mon–Fri: 8:00 AM-5:00 PM✓ Walk-in with Electronic Donor Pass
1901 Trade Center Dr
Saint Peters, MO 63376

1051 Wolfrum Rd

4.97 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
1051 Wolfrum Rd
Saint Charles, MO 63304

107 Piper Hill Dr Ste 100 St. Peters Care Center

5.72 mi
🕑 Testing Hours: Mon–Fri: 6:00 AM-12:00 PM • Sat:,Sun: 8:00 AM-6:00 PM✓ Walk-in with Electronic Donor Pass
107 Piper Hill Dr Ste 100 St. Peters Care Center
Saint Peters, MO 63376

300 Saint Peters Centre Blvd Ste 150

6.22 mi
🕑 Testing Hours: Mon–Fri: 8:00 AM-5:00 PM✓ Walk-in with Electronic Donor Pass
300 Saint Peters Centre Blvd Ste 150
St. Peters, MO 63376

205 First Executive Avenue

6.82 mi
🕑 Facility: Mon–Fri: 07:30 AM - 04:30 PM⚡ Drug Screens: Mon–Fri: 08:00 AM - 04:00 PM
205 First Executive Avenue
Saint Peters, MO 63376

1405 Jungermann Rd Ste B

7.08 mi
🕑 Testing Hours: Mon–Fri: 7:00 AM-7:00 PM • Sat: 8:00 AM-5:00 PM✓ Walk-in with Electronic Donor Pass
1405 Jungermann Rd Ste B
Saint Peters, MO 63376

60 Gailwood Dr Ste B

7.20 mi
🕑 Testing Hours: Mon–Fri: 8:00 AM-6:00 PM • Sat: 10:00 AM-3:00 PM • Sun: 10:00 AM-2:00 PM✓ Walk-in with Electronic Donor Pass
60 Gailwood Dr Ste B
Saint Peters, MO 63376

4101 Mexico Rd Ste E,

7.42 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
4101 Mexico Rd Ste E,
Saint Peters, MO 63376

251 E Pearce Blvd

7.93 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
251 E Pearce Blvd
Wentzville, MO 63385

1111 W Pearce Blvd

8.65 mi
🕑 Testing Hours: Mon–Fri: 8:00 AM-5:00 PM • Sat: 8:00 AM-12:00 PM✓ Walk-in with Electronic Donor Pass
1111 W Pearce Blvd
Wentzville, MO 63385

1201 Wentzville Pkwy Ste 117,

8.84 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
1201 Wentzville Pkwy Ste 117,
Wentzville, MO 63385

17838 Chesterfield Airport Rd

8.98 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
17838 Chesterfield Airport Rd
Chesterfield, MO 63005

17300 N Outer 40 Ste 104,

9.51 mi
🕑 Testing Hours: Mon–Fri: 8:00 AM-2:30 PM✓ Walk-in with Electronic Donor Pass
17300 N Outer 40 Ste 104,
Chesterfield, MO 63005

801 Medical Dr, Ste 200

9.59 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
801 Medical Dr, Ste 200
Wentzville, MO 63385

2101 Collier Corporate Pkwy

9.76 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
2101 Collier Corporate Pkwy
Saint Charles, MO 63303

1794 Zumbehl Rd

9.85 mi
🕑 Testing Hours: Mon–Fri: 8:00 AM-5:00 PM✓ Walk-in with Electronic Donor Pass
1794 Zumbehl Rd
Saint Charles, MO 63303

30 W Highway D Ste 201

10.52 mi
🕑 Testing Hours: Mon–Fri: 8:00 AM-5:00 PM✓ Walk-in with Electronic Donor Pass
30 W Highway D Ste 201
New Melle, MO 63365

2621 Raymond Dr

10.54 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
2621 Raymond Dr
Saint Charles, MO 63301

400 Fountain Lakes Blvd

10.62 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
400 Fountain Lakes Blvd
St Charles, MO 63301

16091 Swingley Ridge Rd Ste 150

11.42 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
16091 Swingley Ridge Rd Ste 150
Chesterfield, MO 63017

50 Monroe St

12.39 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
50 Monroe St
Saint Charles, MO 63301

224 S Woods Mill Rd Ste 360 S Med Bldg

13.11 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
224 S Woods Mill Rd Ste 360 S Med Bldg
Chesterfield, MO 63017

11501 Page Service Dr

13.90 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
11501 Page Service Dr
Saint Louis, MO 63146

15421 Clayton Rd Ste 301

14.05 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
15421 Clayton Rd Ste 301
Ballwin, MO 63011

233 Clarkson Rd

14.19 mi
🕑 Testing Hours: ✓ Walk-in with Electronic Donor Pass
233 Clarkson Rd
Ellisville, MO 63011

1066 Executive Parkway Dr Ste 200

14.74 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
1066 Executive Parkway Dr Ste 200
Saint Louis, MO 63141

Employment, DOT, Court Ordered, Probation, Family

At Accredited Drug Testing, we offer thorough drug and alcohol testing options across our 30 test sites situated in the O'Fallon, Missouri region. Our services include both DOT and non-DOT urine screenings, breath alcohol evaluations, EtG alcohol screens, and hair follicle drug tests suitable for private individuals, businesses, and legal purposes. In O'Fallon, MO, rapid results and SAMSA-certified lab analyses are available, with same-day services accessible. Testing locations are conveniently close to your home or office. We also provide Occupational Health Testing, Clinical Testing, and Background Checks.

You can contact us at (800) 221-4291 or register online. Select your preferred test and a nearby location for yourself, employees, or another person. Scheduling is fast and easy; our scheduling team is ready by phone, or you can organize your test online anytime. Our user-friendly and streamlined process effortlessly facilitates arranging drug tests close to O'fallon.

* You must register by phone or online to receive your donor pass/registration prior to proceeding to the testing center. You must bring a valid government issued ID along with the registration/barcode number which was sent to you by email.

When you're searching for drug testing near me or drug testing locations, we provide a simple and convenient process to find a drug and alcohol testing location near you that is certified to provide all of your drug and alcohol testing needs.

How the Drug Testing Process Works in O'fallon, MO

1

Order Online or Call

Select your test & search nearby O'fallon collection sites.

2

Get Donor Pass

Receive your donor pass by email or SMS immediately.

3

Visit Collection Center

Walk in with donor pass & photo ID. No appointment needed.

4

Fast Results

Secure results delivered confidentially in 24-48 hours.

O'fallon, MO Drug Testing

Drug Testing Services Available at Our O'fallon, MO Labs:

At our O'fallon drug testing collection sites, Accredited Drug Testing provides one of the widest selections of drug and alcohol testing services available. Whether you're an employer, attorney, court, or private individual, we offer both DOT and non-DOT testing options—ranging from rapid tests to comprehensive lab-based screenings—capable of detecting nearly any substance.

Mobile/On-Site Drug Testing

If you're an employer needing to test 25 or more employees and looking to save time and money, we offer mobile on-site drug testing where we come to you. Call us today for more information.

Official Legal & Regulatory Framework

Missouri Drug Testing Laws & Compliance in O'fallon

SAMHSA Certified • MRO Verified

Accredited Drug Testing provides employer and individual screening in O'fallon, MO adhering strictly to Mo. Rev. Stat. § 287.120, federal DOT 49 CFR Part 40 guidelines, and certified SAMHSA laboratory chain-of-custody standards.

Statutory Citation
Mo. Rev. Stat. § 287.120
Medical Marijuana
Legal
Recreational Cannabis
Legal
Workplace Rights
Zero-Tolerance Protected

Missouri workers compensation law permits benefit reductions or forfeitures when workplace accidents result from unauthorized drug or alcohol impairment.

Under Mo. Rev. Stat. § 287.120, employers in O'fallon may institute comprehensive drug-free workplace programs including:

  • Pre-Employment Screening: Conditional job offer testing for all applicants.
  • Reasonable Suspicion Testing: Objective, documented behavioral signs of impairment.
  • Post-Accident Testing: Mandatory screening following workplace injuries or property damage.
  • Random Testing: Unannounced selection for safety-sensitive roles and machinery operators.
  • Workers' Comp Incentives: Verified testing programs provide premium discounts on state workers' compensation insurance policies.

While cannabis statutes continue evolving across the United States (Medical: Legal; Recreational: Legal in Missouri), employers retain the legal prerogative to prohibit substance impairment on job premises, during operational shifts, and while operating company vehicles.

Federal regulations, Department of Transportation (DOT) mandates, and safety-sensitive positions strictly prohibit marijuana use regardless of state cannabis status. ADT provides both standard THC screening and non-THC customized drug panels for private employers wishing to adapt to state-specific hiring preferences.

For commercial drivers, maritime operators, aviation crews, and transit personnel operating in O'fallon, all testing follows rigorous Department of Transportation (DOT) standards governed by 49 CFR Part 40:

  • Federal 5-Panel Regulated Urine Screen: Tested for Marijuana, Cocaine, Amphetamines/Methamphetamines, Opioids (Codeine, Morphine, Heroin, Hydrocodone, Hydromorphone, Oxycodone, Oxymorphone), and PCP.
  • SAMHSA Accredited Laboratories: Zero compromise on testing accuracy with gas chromatography/mass spectrometry (GC/MS) confirmation.
  • Medical Review Officer (MRO): Every non-negative specimen is reviewed by a licensed physician MRO before reporting.
  • FMCSA Clearinghouse Reporting: Real-time reporting of verified positive tests and refusals to test into the federal driver clearinghouse database.

Accredited Drug Testing provides legally admissible drug and alcohol screening for county court dockets, child custody hearings, probation requirements, and pretrial diversion programs throughout O'fallon and Missouri.

All specimens undergo observed or witnessed collection procedures when ordered by the court, accompanied by rigorous Federal Chain of Custody Forms (CCF). Turnaround time is rapid, and official certificates of analysis can be forwarded directly to your attorney, court case officer, or probation supervisor upon release.

Hyper-Local Proximity Coverage

Neighborhoods & Service Districts in O'fallon, MO

Minutes Away, Same-Day Donor Pass

Accredited Drug Testing operates collection centers strategically positioned throughout O'fallon to ensure fast donor access with minimal drive times. Walk-ins are welcomed with an immediate electronic donor pass across all major neighborhoods and transit corridors:

Key O'fallon Neighborhoods Covered:

● Downtown O'fallon ● Central Business District ● North O'fallon Commercial Corridor ● South O'fallon Industrial Park ● East O'fallon Metro Area ● West O'fallon Trade Center ● Medical & Healthcare District ● Airport / Logistics Corridor

Major Employment & Commercial Hubs Served:

O'fallon Main Street Commercial District • O'fallon Regional Trade Center • County Industrial Parkway • Metro Healthcare & Occupational Medical Corridor

Located anywhere in O'fallon? Receive your electronic pass in under 5 minutes.
Order Test Online →

Surrounding Areas Served Near O'fallon

Dardenne Prairie • Cottleville • Lake St. Louis • Lake Saint Louis • St. Paul • Weldon Spring Heights • Saint Peters • St. Peters

O'fallon, MO Drug & Alcohol Test Panels & Detection Windows

Select a test panel below to review specific drug compounds screened, detection timeframes, and instant electronic pass registration in O'fallon.

Test Type & Local Panel Detection Window Common Use Cases in O'fallon Turnaround Time
5-Panel Urine Screen in O'fallon →
THC, Cocaine, Basic Opiates, Amphetamines, PCP
1 to 5 Days Pre-Employment, Workplace Safety & Non-DOT Randoms 24 to 48 Hours
10-Panel Urine Screen in O'fallon →
Adds Benzodiazepines, Barbiturates, Methadone, Propoxyphene
1 to 7 Days Healthcare Staffing, Corporate Policies & Court Orders 24 to 48 Hours
Hair Follicle Drug Test in O'fallon →
Long-term historical pattern analysis (90-day window)
Up to 90 Days Child Custody, Legal Defense & Executive Screening 3 to 5 Business Days
DOT Drug & Alcohol Test in O'fallon →
49 CFR Part 40 compliant with CCF & MRO verification
1 to 5 Days FMCSA, FAA, FRA, FTA, USCG Regulated Drivers & Crew 24 to 48 Hours
ETG & Breath Alcohol in O'fallon →
Evidential breath testing or 80-hour urine EtG metabolite
Breath: 0–12 Hrs
EtG: Up to 80 Hrs
Zero-Tolerance Workplace, Post-Accident & Probation Immediate to 48 Hours
DOT Physical Exam in O'fallon →
FMCSA NRCME certified medical examiner card (Form MCSA-5876)
1 to 2 Year Card Commercial Driver License (CDL) Medical Certification Same-Day Medical Card
Full-Service Testing Solutions

Occupational Health & Specialized Screening in O'fallon, MO

Beyond standard urine screening, Accredited Drug Testing delivers end-to-end occupational medical solutions, DOT credentialing, court-admissible forensic testing, and employer background compliance.

NRCME Certified

DOT Physicals & Medical Cards

FMCSA-compliant examinations conducted by certified medical examiners. Instant driver medical certificate renewal across O'fallon.

AABB Accredited

Court Legal DNA & Paternity

100% court-admissible legal paternity, maternity, sibling, and grandparentage testing with strict chain of custody for family court.

FCRA Compliant

Background Checks & MVR

Comprehensive pre-employment screening, nationwide criminal history searches, and Motor Vehicle Records (MVR) for driver compliance.

Long Detection Window

90-Day Hair Follicle Drug Test

Tamper-resistant 90-day historical substance screening. Preferred by family courts, custody attorneys, and zero-tolerance employers.

Instant & Lab Confirmed

Breath Alcohol & 80-Hr EtG

Evidential breath alcohol testing (BAT) and 80-hour EtG urine/hair metabolite analysis for probation monitoring and workplace safety.

We Come to You

Mobile On-Site Group Testing

Certified mobile collection technicians dispatched directly to your O'fallon facility or job site for groups of 25+ employees.

Local Testing Resource Network

More Drug & Alcohol Testing Options in O'fallon, MO

Need immediate walk-in service in O'fallon? View our Walk-In Drug Testing Near Me in O'fallon, MO facility guide or order an instant electronic donor pass online.

O'fallon Drug Testing

Quickly find trusted local drug testing centers in O'fallon, MO — fast, convenient, and reliable every time!

O'fallon DOT Drug Testing

Quickly find a local DOT drug testing center in O'fallon, MO — fast, reliable, convenient nationwide service!

O'fallon DNA Testing

DNA testing for legal and non-legal purposes including child support, and child custody around O'fallon, MO.

O'fallon Industry Training

Including specimen collector training, DER training, reasonable suspicion training and much more in O'fallon, MO.v

O'fallon Hair Drug Testing

Get fast, accurate hair drug testing at our convenient O'fallon, MO locations—results you can trust, every time!

O'fallon Alcohol Testing

Fast, reliable alcohol testing to keep your workplace safe and compliant every single day in O'fallon, MO.

O'fallon Drug Testing Services

Reliable nationwide drug testing services ensuring accuracy, compliance, and quick results for businesses and individuals in O'fallon, MO.

O'fallon 5 Panel Drug Test

Accurate 5 panel drug testing with fast, confidential results—trusted by O'fallon, MO employers and individuals nationwide.

O'fallon 10 Panel Drug Test

Comprehensive 10 panel drug testing with fast, reliable results—trusted for O'fallon, MO workplace and personal testing needs.

O'fallon On Site Drug Testing

Convenient on-site mobile drug testing with fast, reliable results—saving time while keeping your O'fallon, MO workplace compliant.

O'fallon DOT Physicals

Certified DOT physicals with quick, reliable exams to keep O'fallon, MO drivers compliant and on the road with confidence.

DOT Consortium

Join our DOT consortium for hassle-free compliance, random testing management, and reliable driver safety solutions.


Frequently Asked Questions

In Missouri, workplace drug testing is governed by statutory guidelines under Mo. Rev. Stat. § 287.120. Private employers generally operate under a Missouri Article XIV and labor statutes, permitting pre-employment, random, post-accident, and reasonable suspicion testing.
Yes. Employers in Missouri who implement a certified Drug-Free Workplace Program in compliance with Mo. Rev. Stat. § 287.120 can qualify for insurance premium discounts and enhanced legal protections during workers' compensation claims.
Under Missouri state law compliance standards, state statutes protects off-duty medical cardholders for non-safety positions. Safety-sensitive positions, DOT-regulated roles, and federal contract compliance remain strictly zero-tolerance across all jurisdictions.
Accredited Drug Testing provides access to 30 certified collection sites in the O'fallon area, offering urine, hair follicle, breath alcohol, and DOT testing.
While walk-ins are welcome with an electronic donor pass at collection sites across O'fallon, registering your test online or calling (800) 221-4291 prior to visiting guarantees rapid priority specimen collection with an instant barcode pass.
Negative drug and alcohol test results are typically released within 24 to 48 hours of specimen processing. Any non-negative screenings undergo confirmatory GC/MS or LC/MS testing and licensed Medical Review Officer (MRO) verification within 3 to 5 business days.

Customer Reviews

Excellent service!

Excellent service! Trish went above and beyond to find me a testing site as close to my home as possible. Results were faster than expected, as well. Thanks for your help, Trish and Accredited!

Es Hache - 4/13/2025

Reception is kind and helpful

Reception is kind and helpful , everything quick and simple , best urgent care

Yusuf Narmuradov - 11/19/2024

Fast and efficient service

Fast and efficient service for employers wanting to do pre employment drug screening that meets DOT requirements!!

Mary Thomas - 4/5/2025


(800) 221-4291