Drug Screening Near Me - Selma, TX

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

With 37 testing centers in the Selma 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.

37 Drug-Testing Centers in Selma

Minutes Away, Test Today

6704 Guada Coma Dr

2.50 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
6704 Guada Coma Dr
Schertz, TX 78154

12702 Toepperwein Rd Ste 120

2.98 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
12702 Toepperwein Rd Ste 120
San Antonio, TX 78233

12602 Toepperwein Rd Ste 220

2.99 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
12602 Toepperwein Rd Ste 220
Live Oak, TX 78233

2957 Lotus Park

3.81 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
2957 Lotus Park
Schertz, TX 78154

1264 Fm 78 Unit 115

4.54 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
1264 Fm 78 Unit 115
Schertz, TX 78154

6032 Fm 3009 Ste 120

4.54 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
6032 Fm 3009 Ste 120
Schertz, TX 78154

5620 Randolph Blvd

5.27 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
5620 Randolph Blvd
San Antonio, TX 78233

12650 Nacogdoches Rd

5.40 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
12650 Nacogdoches Rd
San Antonio, TX 78217

6100 Ne Loop 410

6.72 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
6100 Ne Loop 410
San Antonio, TX 78218

7110 Fm 78 Ste 110

8.18 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
7110 Fm 78 Ste 110
San Antonio, TX 78244

8601 Village Dr Ste 202

8.20 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
8601 Village Dr Ste 202
San Antonio, TX 78217

10200 Broadway St Ste 200

8.66 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
10200 Broadway St Ste 200
San Antonio, TX 78217

19422 Us Highway 281 N Ste 106

8.94 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
19422 Us Highway 281 N Ste 106
San Antonio, TX 78258

22906 Us Highway 281 N Ste 108

8.96 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
22906 Us Highway 281 N Ste 108
San Antonio, TX 78258

6021 Rittiman Plz

9.07 mi
🕑 Testing Hours: Mon–Fri: 8:00 AM-5:00 PM✓ Walk-in with Electronic Donor Pass
6021 Rittiman Plz
San Antonio, TX 78218

17700 San Pedro Ave Ste 300

9.10 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
17700 San Pedro Ave Ste 300
San Antonio, TX 78232

18707 Hardy Oak Blvd, Ste 560

9.69 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
18707 Hardy Oak Blvd, Ste 560
San Antonio, TX 78258

8522 Broadway St Ste 111

9.96 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
8522 Broadway St Ste 111
San Antonio, TX 78217

8223 Broadway St

10.33 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
8223 Broadway St
San Antonio, TX 78209

1211 Austin Hwy Suite 110

10.39 mi
🕑 Testing Hours: Mon–Fri: 8:00 AM-7:00 PM • Sat:,Sun: 9:00 AM-5:00 PM✓ Walk-in with Electronic Donor Pass
1211 Austin Hwy Suite 110
San Antonio, TX 78209

280 N Interstate 35 Ste 300

10.60 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
280 N Interstate 35 Ste 300
New Braunfels, TX 78130

19016 Stone Oak Parkway #265

10.61 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
19016 Stone Oak Parkway #265
San Antonio, TX 78258

6170 Ih 10 E Bldg 2

10.70 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
6170 Ih 10 E Bldg 2
San Antonio, TX 78219

431 Isom Rd Ste 123

11.35 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
431 Isom Rd Ste 123
San Antonio, TX 78216

166 Red Hawk Ridge

11.49 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
166 Red Hawk Ridge
San Antonio, TX 78258

166 Red Hawk Rdg

11.49 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
166 Red Hawk Rdg
San Antonio, TX 78258

16755 Huebner Rd

12.35 mi
🕑 Testing Hours: ✓ Walk-in with Electronic Donor Pass
16755 Huebner Rd
San Antonio, TX 78248

3453 N Panam Expy Ste 110

12.45 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
3453 N Panam Expy Ste 110
San Antonio, TX 78219

3453 N Panam Expy Ste 120

12.45 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
3453 N Panam Expy Ste 120
San Antonio, TX 78219

6521 San Pedro Ave

12.54 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
6521 San Pedro Ave
San Antonio, TX 78216

Estes Express Terminal 427 Gembler Road

12.61 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
Estes Express Terminal 427 Gembler Road
San Antonio, TX 78219

1534 Contour Dr Ste 102

12.78 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
1534 Contour Dr Ste 102
San Antonio, TX 78212

1329 W San Antonio St

13.13 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
1329 W San Antonio St
New Braunfels, TX 78130

6420 Nw Loop 410 Ste 102

13.98 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
6420 Nw Loop 410 Ste 102
San Antonio, TX 78238

7555 Nw Loop 410 Ste 114

13.98 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
7555 Nw Loop 410 Ste 114
San Antonio, TX 78245

5714 Nw Loop 410 Ste 500

13.98 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
5714 Nw Loop 410 Ste 500
San Antonio, TX 78238

900 Ne Loop 410 Ste D309

13.98 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
900 Ne Loop 410 Ste D309
San Antonio, TX 78209

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 Selma, TX, a urine drug screening (UDS) provides a thorough examination of a urine sample to determine the presence of various drugs and their metabolites. Widely employed in workplace and regulated programs, this method stands out due to its non-invasiveness, economic feasibility, and its capability to detect a broad array of substances within a suitable detection period.

  • Conducted under stringent chain-of-custody principles to ensure regulated testing protocols.
  • Capable of revealing both parent drugs and their metabolites during excretion in urine.
  • Serves as evidence of previous drug exposure within an identified detection timeline, but does not assess current impairment levels.

Why Organizations Use Urine Drug Screening

  • In Selma, TX, pre-employment drug testing ensures the maintenance of a secure and drug-free workplace environment.
  • Testing can occur randomly, post-accident, based on reasonable suspicion, or when an employee is returning to duty.
  • Ensures adherence to legal requirements within industries where safety is crucial.
  • Helps in tracking compliance with prescribed medications or rehabilitation programs.

How It Works

Collection

  • In the state of Selma, TX, the donor is required to provide a sample in a secure container, with the process being observed or unobserved depending on the program's stipulations.
  • Specimen validity assessments may include testing for creatinine levels, specific gravity, and pH balance.

Testing Methodology

  • An initial immunoassay test is conducted to provide a quick and economical assessment.
  • If the preliminary results indicate possible drug presence, confirmatory tests like GC/MS or LC/MS/MS are conducted to validate findings.
  • In Texas, cutoff levels, measured in nanograms per milliliter (ng/mL), are used to determine whether the result is positive or negative.

Interpreting Results

  • Perform an initial immunoassay screening in Selma, TX for a speedy and budget-friendly evaluation.
  • Use confirmatory testing methods such as GC/MS or LC/MS/MS for samples showing presumptive positives.
  • Determine a sample's outcome (positive or negative) based on established cutoff levels measured in ng/mL.

Detection Windows

Various factors, including the specific drug, frequency of usage, metabolic rate, hydration status, body composition, and the sensitivity of the testing method in Selma, TX can affect detection capabilities. Generally, many drugs can be identified within a 1 to 3-day period, although substances such as cannabinoids may extend this timeframe for chronic users.

Key Considerations for Regulated (e.g., DOT) Programs

Benefits and Limitations

Benefits

  • In Selma, TX, this is a widely accepted and cost-efficient method that provides comprehensive substance coverage.
  • It offers a balanced detection window, suitable for monitoring in workplace settings.

Limitations

  • In Selma, TX, urine tests do not determine real-time impairment.
  • Without confirmatory testing, there's a possibility of encountering false positives or negatives.
  • May not identify very recent usage that lies outside the typical detection window.

Best Practices for Implementation

  • Develop a comprehensive written policy that clarifies testing purposes, panel configurations, cutoff guidelines, confidentiality, and the repercussions of results.
  • Employ a dual-phase testing method: preliminary screening followed by confirmatory diagnostics.
  • Educate employees and sample providers regarding the processes and what is expected.
  • Analyze positivity trends to enhance wellness and safety initiatives.
  • Coordinate with dependable collection networks and accredited laboratories in Selma, TX.

Summary

Urine drug screening holds a significant stance in safety, compliance, and risk governance realms in Selma, TX. Utilizing accredited procedures, solid chain-of-custody, rigorous confirmatory checks, and expert review ensures UDS can efficiently identify prior drug exposure and sustain a safe, industrious environment.





What Is a Hair Drug Screen?

In Selma, TX, hair drug testing involves analyzing a small sample of hair to detect drug use, examining drugs and their byproducts embedded in the hair shaft after circulating in the bloodstream. Owing to the slow growth of hair, drug metabolites are stored for months, making this a preferred method for identifying sustained or habitual substance use over an extended period.

  • Typically, 100-120 strands of hair are collected close to the scalp, usually representing an analysis period of around 90 days, depending on the length of the hair.
  • The examination is capable of identifying varied drug types, including amphetamines, opioids, cocaine, marijuana, and PCP.

Why Organizations Use Hair Drug Screening

How It Works

Collection

  • A trained collector trims a small sample, usually from the crown area, while adhering to the chain-of-custody protocols in Selma, TX.
  • The hair sample is then sealed, properly labeled, and dispatched to a certified laboratory for analysis.
  • If scalp hair is not available, alternate collection sites, such as body hair, may be utilized.

Testing Methodology

  • SAMPLES are washed beforehand to strip away any external contaminants, ensuring accurate testing results.
  • Initial screening employs immunoassay methodologies to broadly detect drug classes.
  • Should the preliminary result indicate drug presence, precise confirmation follows with testing techniques like GC/MS or LC/MS/MS.
  • Established cutoff levels are noted in nanograms per milligram (ng/mg), following SAMHSA and laboratory standards.

Interpreting Results

  • Negative: Drug/metabolite is not detected above the established laboratory threshold.
  • Positive: Detection and confirmation of drug/metabolite takes place through secondary analytical procedures.
  • Inconclusive/Rejected: An inadequate sample or contamination necessitates a repeat collection.

Detection Windows

Hair drug testing offers the most extended detection period of any testing method in Selma, TX. A standard hair length of 1.5 inches indicates approximately 90 days of potential drug exposure, with longer hairs reflecting a broader period depending on growth rate (around 0.5 inches monthly). Unlike urine-based tests, hair does not capture very recent drug use (within the last 7–10 days).

Key Considerations for Regulated and Non-Regulated Testing

  • Currently, DOT regulations do not mandate hair testing; however, ongoing evaluations by the Department of Transportation and HHS are underway for future potential guidelines.
  • Hair testing, for non-DOT purposes, is recognized as an efficient tool for long-term detection.
  • Collection must be executed by trained personnel following documented chain-of-custody procedures.
  • Laboratories should possess either SAMHSA or CAP/CLIA accreditation to ensure test accuracy and dependability.

Benefits

  • In Selma, TX, hair testing boasts an extensive detection timeframe of up to 90 days or longer.
  • It is significantly challenging to adulterate or substitute compared to urine samples.
  • This test offers a straightforward representation of prolonged or repeated drug use.
  • The collection process is swift, non-invasive, and requires no restroom use.

Limitations

Best Practices for Implementation

Summary

Hair drug screening provides a robust and credible means for uncovering sustained drug usage, presenting an effective solution for employers, legal agencies, and treatment contexts aiming for an overarching comprehension of an individual's drug history in Selma, TX. When implemented by proficient collectors and evaluated within certified laboratories, hair testing offers indisputable, tamper-resistant results that facilitate the assurance of workplace safety and integrity.

Selma Drug Testing

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

Selma DOT Drug Testing

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

Selma DNA Testing

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

Selma Industry Training

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

Selma Hair Drug Testing

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

Selma Alcohol Testing

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

Selma Drug Testing Services

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

Selma 5 Panel Drug Test

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

Selma 10 Panel Drug Test

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

Selma On Site Drug Testing

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

Selma DOT Physicals

Certified DOT physicals with quick, reliable exams to keep Selma, 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

Very helpful

They were very helpful in finding a place to get tested on the route back home! They made a difficult time seem easy with no judgement!

Anne Creden - 11/19/2024

This is by far the easiest

This is by far the easiest way to get my lab work ordered and paid for. The phone calls are short and to the point. They don’t try to push extra sales on you and when I walk in to the clinic I simply show my donor pass and with in a matter of minutes I’m done. I will continue to use ADT in the future.

Jason Jackson - 7/19/2025

Kind and very helpful

Called around for hours and posted from company to person and got nowhere and had to fight to get a refund die to there miss information, well save time and sanity Acredited is the ONLY place the person was kind and very helpful, said what I needed and Faith the lady I dealt with made it simple and she did above and beyond everything I needed, as I'm going through a devorse this was a great help and made my day 100 stars from me.

Steven Harrison - 12/19/2024

Fast,easy and efficient

Fast,easy and efficient. They made the whole process stress free and simple. Thanks 😊

Micheal Ankenbrandt - 2/19/2025

they have made my job much easier

I always have a good experience setting up company driver drug screens through ADT. I'm really happy I found them while searching online, they have made my job much easier.

Exodus Heath - 2/13/2025

Explained everything so no questions

Torin was great. Explained everything so no questions

Tony Lombardo - 4/18/2025

Super Easy!

Super easy to set up an appointment through the phone. They walked me through all the steps and found me a location right near my house. Would definitely recommend!

Aldita Lumaj - 1/17/2025

quick to assist

They are very quick to assist with your orders and they helped when I needed to find a new testing facility.

Gary Matkin - 2/19/2025

Excellant Performance

The visit here is always the best . The place is always really clean. The employees are super courteous, very polite, and professional. This is the only drug lab I like to go do my drug and alcohol test. I would like to tell them thank you so much for thier excellent performance and job

Eli Gonzalez - 1/4/2025

Extremely polite

They were very fast extremely polite walked you through every detail of the process if you had any questions they had no problems answering

Billy Williams - 2/19/2025


(800) 221-4291