Drug Screening Near Me - Mercedes, TX

Employment, DOT, Court Ordered, Personal
Urine| Hair Follicle | Oral Fluid | Blood | ETG

With over 35 testing centers in the Mercedes 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.

38 Drug-Testing Centers in Mercedes

Minutes Away, Test Today

1221 East 10th St, Suite 101-a

3.69 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
1221 East 10th St, Suite 101-a
Weslaco, TX 78596

1710 E 8th St

3.73 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
1710 E 8th St
Weslaco, TX 78596

1102 S Airport Bldg 2

3.81 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
1102 S Airport Bldg 2
Weslaco, TX 78596

624 N Tio Ave Ste B

3.87 mi
🕑 Testing Hours: Mon–Fri: 9:00 AM-4:00 PM✓ Walk-in with Electronic Donor Pass
624 N Tio Ave Ste B
Weslaco, TX 78596

2602 W Expressway 83 Ste 2

4.71 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
2602 W Expressway 83 Ste 2
Weslaco, TX 78596

1210 W Expressway 83 Ste B

4.71 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
1210 W Expressway 83 Ste B
Weslaco, TX 78596

7701 Yvette Cir Ste 2

6.25 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
7701 Yvette Cir Ste 2
Mercedes, TX 78570

427 E Duranta Ave Ste 103

11.94 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
427 E Duranta Ave Ste 103
Alamo, TX 78516

1214 Dixieland Rd Ste 8

12.08 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
1214 Dixieland Rd Ste 8
Harlingen, TX 78552

1214 Dixieland Rd Ste 8

12.08 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
1214 Dixieland Rd Ste 8
Harlingen, TX 78552

5505 S Expressway 77 Ste 103

12.38 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
5505 S Expressway 77 Ste 103
Harlingen, TX 78550

1402 S M St Ste 3

12.72 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
1402 S M St Ste 3
Harlingen, TX 78550

721 W Harrison Ave

13.34 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
721 W Harrison Ave
Harlingen, TX 78550

512 Victoria Ln Ste 7

14.96 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
512 Victoria Ln Ste 7
Harlingen, TX 78550

1901 Bell St Ste B

14.96 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
1901 Bell St Ste B
Harlingen, TX 78550

216 N Ed Carey Dr Ste 1

16.81 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
216 N Ed Carey Dr Ste 1
Harlingen, TX 78550

220 S Cage Blvd Ste C

17.03 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
220 S Cage Blvd Ste C
Pharr, TX 78577

200 E Interstate 2 Ste Q

17.13 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
200 E Interstate 2 Ste Q
Pharr, TX 78577

1106 W Sam Houston St

17.19 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
1106 W Sam Houston St
Pharr, TX 78577

6201 South Cage Blvd Ste 6

17.51 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
6201 South Cage Blvd Ste 6
Pharr, TX 78577

351 N Sam Houston Blvd

17.72 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
351 N Sam Houston Blvd
San Benito, TX 78586

926 W Nolana Loop Ste A

18.02 mi
🕑 Testing Hours: ✓ Walk-in with Electronic Donor Pass
926 W Nolana Loop Ste A
Pharr, TX 78577

822 W Wisconsin Rd

18.22 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
822 W Wisconsin Rd
Edinburg, TX 78539

409 E Mahl St

18.27 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
409 E Mahl St
Edinburg, TX 78539

1200 S 10th Ave

18.29 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
1200 S 10th Ave
Edinburg, TX 78539

403 N Jackson Rd

18.32 mi
🕑 Testing Hours: Mon–Fri: 9:00 AM-6:00 PM✓ Walk-in with Electronic Donor Pass
403 N Jackson Rd
Pharr, TX 78577

1102 W Trenton Rd

18.37 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
1102 W Trenton Rd
Edinburg, TX 78539

122 W Champion St

18.39 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
122 W Champion St
Edinburg, TX 78539

1401 E Ridge Rd Ste C

18.40 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
1401 E Ridge Rd Ste C
Mcallen, TX 78503

104 S 12th Ave

18.44 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
104 S 12th Ave
Edinburg, TX 78539

2505 W Trenton Rd

18.46 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
2505 W Trenton Rd
Edinburg, TX 78539

2109 W Trenton Rd Unit E

18.46 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
2109 W Trenton Rd Unit E
Edinburg, TX 78539

1201 East Ridge Road, Ste A

18.53 mi
🕑 Testing Hours: Mon–Fri: 8:00 AM-11:00 AM & 1:00 PM-2:00 PM • Sat: 9:00 AM-10:30 AM✓ Walk-in with Electronic Donor Pass
1201 East Ridge Road, Ste A
Mcallen, TX 78503

1301 E Fern Ave Ste B3

18.77 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
1301 E Fern Ave Ste B3
Mcallen, TX 78501

2015 Jackson Creek Ave

18.91 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
2015 Jackson Creek Ave
Edinburg, TX 78539

801 E Nolana Ave Ste 9

19.01 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
801 E Nolana Ave Ste 9
Mcallen, TX 78504

4847 S Jackson Rd

19.20 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
4847 S Jackson Rd
Edinburg, TX 78539

110 E Savannah Ave

19.28 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
110 E Savannah Ave
Mcallen, TX 78503

Nationwide Convenience

Find a drug screening near you in minutes. Our team will schedule your visit and email your authorization form right away, no walk-in confusion.

Trusted Results

Lab-based testing with MRO review available. Chain-of-custody and defensible documentation for employers, legal needs, and compliance.

Fast Turnaround

Rapid screens with same-day results options, plus confirmatory lab testing. Clear timelines and proactive status updates.

Drug Screening Services Near You

Urine Drug Screening

  • 5, 10, 12, 14 panel options
  • Lab-based & rapid screens
  • DOT and non-DOT

Hair Drug Screening

  • 90-day lookback
  • Observed collection
  • Work, court, personal

Oral Fluid Drug Screening

  • On-site friendly
  • Recent-use detection
  • DOT oral fluid coming soon

Specialty Screening Panels

  • Child Guard Exposure
  • Alcohol (EtG/EtS)
  • Custom employer panels

For Employers

  • Pre-employment, random, post-accident, and reasonable suspicion
  • DOT compliance (FMCSA, FAA, FRA, FTA, PHMSA, USCG)
  • Electronic CCF, consolidated reporting, and MRO review
Employer Solutions

For Individuals

  • Personal, court, probation, school, and athletic programs
  • Confidential ordering with clear instructions
  • Results delivered securely
Order a Screening


What Is a Urine Drug Screen?

In Mercedes, TX, a Urine Drug Screen (UDS) involves a comprehensive analysis of a urine sample to identify drugs and their breakdown products. Known for its widespread use in workplace and regulated settings, this method offers advantages such as being non-invasive, cost-effective, and capable of identifying a wide array of substances over a practical detection timeframe.

  • Conducted under stringent chain-of-custody protocols for regulated testing purposes.
  • Capable of detecting both the original drugs and their metabolites as they appear in urine.
  • Provides evidence of previous substance exposure within a detection period rather than indicating on-the-spot impairment.

Why Organizations Use Urine Drug Screening

  • Employers in Mercedes, TX utilize pre-employment screenings as a strategy to uphold a safe and drug-free work environment.
  • Diverse testing applications, such as random checks, post-incident assessments, reasonable suspicion-triggered tests, and return-to-duty examinations, are employed.
  • Ensuring adherence to stringent regulatory standards in industries where safety is paramount is a key focus.
  • Monitoring the consistency with prescribed medication or treatment regimens is essential for compliance and safety.

How It Works

Collection

  • In Mercedes, TX, donors are required to provide their urine sample in a secure, approved container, whether under observation or not, as per program stipulations.
  • Verification of specimen integrity in Mercedes, TX might involve checking creatinine levels, specific gravity, and pH value.

Testing Methodology

Interpreting Results

  • In Mercedes, TX, a preliminary screen using immunoassay technology enables quick evaluations that are cost-efficient to implement.
  • For preliminary positive results, confirmatory testing such as GC/MS or LC/MS/MS is employed.
  • In Mercedes, TX, determination of positive or negative outcomes relies on benchmark concentration levels expressed in ng/mL.

Detection Windows

In Mercedes, TX, detection periods vary by substance type, usage frequency, personal metabolic rate, hydration state, body composition, and the test's sensitivity. Commonly, many drugs are detected for 1–3 days; however, substances like cannabinoids under chronic use can remain detectable for more extended periods.

Key Considerations for Regulated Programs

  • It's important to adhere to federal regulations while employing certified laboratories in Mercedes, TX.
  • Qualified collectors must be used, maintaining a strict chain of custody to ensure sample integrity.
  • To prevent tampering or adulteration, specimen validity testing is crucial.
  • An experienced Medical Review Officer (MRO) in Mercedes, TX should review results where necessary.
  • Documenting procedures comprehensively and maintaining records are vital, alongside defining clear follow-up actions after receiving positive results.

Benefits and Limitations

Benefits

  • In Mercedes, TX, this method becomes widely favored due to its economic viability and broad-spectrum applicability for detecting a multitude of substances.
  • Presents an effective timeframe that aligns well with the needs of workplace drug monitoring.

Limitations

  • In the state of Mercedes, TX, this method cannot indicate real-time impairment due to drug use.
  • Possibility exists for false positives or negatives without appropriate confirmatory testing.
  • Very recent substance use might not be detected if it falls outside of the defined detection window.

Best Practices for Implementation

  • Implement a comprehensive written policy clearly outlining testing reasons, the panels used, cutoff levels, confidentiality protocols, and consequences for policy breaches.
  • Adopt a two-tier approach starting with an initial screening assay followed by thorough confirmatory testing for positive results.
  • Proactively educate employees and participants about the testing process, expectations, and rationale, particularly in regulatory-compliant regions like Mercedes, TX.
  • Monitor and analyze positivity trends to bolster workplace safety and wellness initiatives effectively.
  • Form strategic partnerships with dependable collection networks and well-accredited laboratories.

Summary

Urine drug screening, a vital practice in Mercedes, TX, plays a crucial role in promoting safety, ensuring compliance, and managing risks. With carefully verified procedures, a defensible chain-of-custody, confirmatory analysis, and diligent review by experts, organizations depend on UDS to detect past substance exposure and help preserve a secure and productive environment.





What Is a Hair Drug Screen?

Hair drug screening in Mercedes, TX involves examining a small sample of hair to trace the presence of drugs and metabolites that, having circulated through the bloodstream, become incorporated into the hair shaft. Hair's slow growth and storage of drug metabolites offer one of the most prolonged detection windows available, making it suitable for chronic or extended drug use identification.

  • Typically, 100–120 strands cut near the scalp are necessary, encompassing an approximate 1.5-inch segment.
  • Captured hair offers a retrospective drug use window of roughly 90 days, depending on its length.
  • Capable of detecting many substances, including amphetamines, opioids, cocaine, marijuana, and PCP.

Why Organizations Use Hair Drug Screening

  • Deploy pre-employment hair testing to unearth extensive substance usage in Mercedes, TX.
  • Conduct random or periodic examinations in workplaces, especially within safety-sensitive fields.
  • Monitor compliance within therapeutic or judicial frameworks.
  • Verify lifestyle abstinence or adherence to company drug-free regulations.

How It Works

Collection

  • A collector strategically trims a small sample, ideally around the crown area while upholding chain-of-custody regulations.
  • The gathered sample is then fastened securely, labeled appropriately, and dispatched to a certified lab for testing.
  • If hair from the scalp isn't accessible, collection from alternative sites such as body hair may be performed.

Testing Methodology

  • In Mercedes, TX, collected hair samples undergo washing and preparation to eliminate external contamination.
  • Initial screening assays employ immunoassay technology to detect numerous drug classes.
  • Positive findings from the screening are confirmed through more precise methods, such as Gas Chromatography-Mass Spectrometry (GC/MS) or Liquid Chromatography-Mass Spectrometry (LC/MS/MS) testing.
  • Cutoff levels prescribed in nanograms per milligram (ng/mg) help determine the results according to SAMHSA and laboratory standards.

Interpreting Results

  • Negative: No substance is detected above the lab-specified cutoff level in Mercedes, TX.
  • Positive: A substance or metabolite is identified and verified through secondary rigorous testing.
  • Inconclusive/Rejected: Sample quantity may be insufficient, or contamination present, necessitating a reevaluation or recollection.

Detection Windows

Hair testing offers the longest period of drug detection among various testing methods, providing valuable insights into potential drug use over an extended timeframe. A standard 1.5-inch hair sample can reflect up to 90 days of drug exposure, with longer samples expanding this detection period. The method, however, does not capture recent use within the past 7–10 days.

Key Considerations for Regulated and Non-Regulated Testing

  • Despite the current absence of DOT requirements for hair testing, ongoing assessments by the Department of Transportation and HHS continue to explore potential guidelines.
  • In non-DOT contexts, hair testing is widely accepted as a robust method for detecting long-term drug use.
  • Collection should be performed by trained professionals following documented chain-of-custody procedures.
  • Certified laboratories, accredited by SAMHSA or CAP/CLIA, should be used to ensure accuracy and reliability.

Benefits

  • A prolonged detection window, extending up to 90 days or longer, is a significant advantage.
  • Hair tests are challenging to adulterate or replace, contrasting the vulnerabilities of urine specimens.
  • They provide clarity regarding chronic or repeated drug use patterns.
  • In Mercedes, TX, the sample collection process is efficient, minimally invasive, and restroom facilities are unnecessary.

Limitations

Best Practices for Implementation

  • Mercedes, TX entities should enforce a documented policy that delineates the strategic application and rationale for hair testing.
  • Collectors must receive training on optimal sample size requirements, appropriate collection site identification, and precise sealing procedures.
  • Choices of laboratory partners must include those with superior analytical proficiencies and SAMHSA adherence.
  • Communicate information about the distinctions between hair, urine, and oral fluid testing to all employees.
  • Preserve confidentiality and uphold consistent documentation across testing operations.

Summary

Hair drug screening delivers a potent and trustworthy method for identifying prolonged drug consumption. This makes it an attractive choice for employers, legal frameworks, and treatment programs aspiring for a wholly comprehensive evaluation of an individual's drug usage history in places like Mercedes, TX. When executed by proficient collectors and processed in verified labs, hair testing offers defensible, tamper-evident outcomes that uphold workplace integrity and safety.

Mercedes Drug Testing

Quickly find trusted local drug testing centers in Mercedes, TX — fast, convenient, and reliable every time!

Mercedes DOT Drug Testing

Quickly find a local DOT drug testing center in Mercedes, TX — fast, reliable, convenient nationwide service!

Mercedes DNA Testing

DNA testing for legal and non-legal purposes including child support, and child custody around Mercedes, TX.

Mercedes Industry Training

Including specimen collector training, DER training, reasonable suspicion training and much more in Mercedes, TX.v

Mercedes Hair Drug Testing

Get fast, accurate hair drug testing at our convenient Mercedes, TX locations—results you can trust, every time!

Mercedes Alcohol Testing

Fast, reliable alcohol testing to keep your workplace safe and compliant every single day in Mercedes, TX.

Mercedes Drug Testing Services

Reliable nationwide drug testing services ensuring accuracy, compliance, and quick results for businesses and individuals in Mercedes, TX.

Mercedes 5 Panel Drug Test

Accurate 5 panel drug testing with fast, confidential results—trusted by Mercedes, TX employers and individuals nationwide.

Mercedes 10 Panel Drug Test

Comprehensive 10 panel drug testing with fast, reliable results—trusted for Mercedes, TX workplace and personal testing needs.

Mercedes On Site Drug Testing

Convenient on-site mobile drug testing with fast, reliable results—saving time while keeping your Mercedes, TX workplace compliant.

Mercedes DOT Physicals

Certified DOT physicals with quick, reliable exams to keep Mercedes, TX 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

You can order online or call 800-221-4291 for same-day scheduling. After payment, an authorization form is emailed immediately for use at any of our 17,000+ testing centers.
Accredited Drug Testing provides urine, hair, oral fluid, and specialty panels such as EtG alcohol and exposure testing. Both DOT and non-DOT testing options are available nationwide.
Yes. DOT testing follows 49 CFR Part 40, using SAMHSA-certified labs, qualified collectors, strict chain-of-custody, and MRO review for all regulated modes (FMCSA, FAA, FRA, FTA, PHMSA, USCG).
Rapid tests often provide same-day results. Lab-based testing typically reports within 24–72 hours after specimen collection and laboratory analysis.
Yes. All results are handled in accordance with HIPAA and DOT privacy requirements. Accredited Drug Testing never shares personal data without consent or legal obligation.
Absolutely. We support workplace programs, legal and probation requirements, schools, athletics, and private personal testing needs across the United States.

Customer Reviews

Great experience

Great experience and great lab. Customer service agent was very helpful.

Jenna Bee - 2/19/2025

Super Helpful

Detricia was super helpful in making sure that the drug test is sent my worker for was the right one I needed for my company to be compliant with my customers drug test requirements.

Kevin Howell - 12/19/2024

Extremely pleasant

Initially Torrie helped me but I needed to call back. When I called back Kayla stepped in and finished my order. Both were extremely pleasant over the phone and provided wonderful customer service. Kudos to them!

Brynne Beverly - 4/19/2024

ADT was able to get me the best tests

Dealing with allegation’s of drug use that completely false is stressful, ADT was able to get me the best tests, going back the farthest in the same day with as little hassle as possible, I spoke with 1 person and wasn’t transferred once, and they took my payment, and got me my work order for a clinic as close as possible for the service I needed. 5*

Christopher Hansis - 12/19/2024

Very easy to get scheduled

Very easy to get scheduled and easy process once checked in and the staff were all extremely friendly! I would recommend this company!

Ronickia Moore - 11/19/2024

Pretty Straightforward

It was a pretty straightforward process getting an appointment and making payment. Getting to the testing site was quick. I was in and out in no time.

Sadiat Ogunyemi - 12/19/2024

A very nice company

A very nice company of expertise. The staff will go above to help you out of your situation in a timely matter 👏

Tam Jack - 2/19/2025

phone support has been excellent

I have used ADT several times. Their phone support has been excellent, both when putting in the orders and when asking for help to interpret results.

Tee Ess - 12/19/2024

Polite

I ran into a situation because the Guthrie had closed and I had to go to well care and they were right on it. I had no problems when I called to get connected with welcare everything worked out and I didn't even have to wait.they were polite and talked with the receptionist for me once I got them on the phone.

Sayre - 8/19/2024

Clear and Competent

I was so surprised with the quality of customer service I received today when I called Accredited Drug Testing. The representative was so clear and competent. She was able to reschedule an appointment at my preferred location. The representative whose name is Justice, was so polite and competent. She expedited the whole process. It was a relief to me.

Rachel Padian - 9/6/2024


(800) 221-4291