Hair Follicle Drug Testing: How It Works and Who Needs It
What Is Hair Follicle Drug Testing?

Hair follicle drug testing is a trusted method used to detect drug use over a longer period—typically up to 90 days. This makes it one of the most thorough and dependable testing options available. It is often used by employers, courts, social service agencies, and individuals seeking accurate, long-term screening.
At Blue Water DRP LLC in Port Huron, Michigan, we provide hair follicle testing for pre-employment purposes, personal screenings, court-ordered cases, DHS requirements, and more. This test gives reliable insight into a person’s history with substance use, helping to meet both legal and professional standards.
Why Choose Hair Follicle Testing?
Hair follicle testing offers several advantages over other methods such as urine or saliva testing. It’s harder to tamper with, covers a much longer timeframe, and is legally defensible in many cases.
Benefits of Hair Follicle Testing:
- Detects drug use for up to 90 days
- Less prone to adulteration or substitution
- Tests for a broad range of substances
- Simple, non-invasive sample collection
- Commonly accepted in legal and professional settings
Because of these benefits, hair testing is often requested in situations that require a thorough review of substance use history.

How the Hair Follicle Drug Testing Process Works
When you visit Blue Water DRP LLC for a hair follicle test, the process is quick and professional. Here's what you can expect:
Check-In
Arrive at our Port Huron facility during business hours with a valid photo ID. Our staff will verify your information and testing requirements.
Sample Collection
A small sample of hair—about 90 to 120 strands—is cut close to the scalp, usually from the crown of the head. If head hair is not available, body hair may be used instead.
Lab Analysis
The hair sample is sent to a certified lab where it undergoes a detailed analysis. Results are typically available within 3 to 5 business days.
Results Reporting
Results are sent to the appropriate recipient—whether it's an employer, court, agency, or the individual tested.
Who Needs Hair Follicle Drug Testing?
This form of testing is used in a wide range of situations throughout Michigan. At Blue Water DRP LLC, we serve a diverse client base including:
Employers
Businesses often request hair follicle tests to ensure they are hiring individuals who remain drug-free over time, not just in the short term.
Court Systems
Family courts and criminal courts may require hair testing as part of custody evaluations, probation requirements, or substance abuse monitoring.
DHS and Foster Care Cases
The Department of Health and Human Services may request this testing to evaluate parents or guardians for placement purposes.
Individuals Seeking Personal Testing
Some clients request hair follicle testing to prove long-term sobriety, meet personal goals, or prepare for future legal or employment matters.
DOT and Return-to-Duty Monitoring
While urine testing is standard for DOT, follow-up cases or employers may also request hair testing to confirm extended sobriety.
Frequently Asked Questions
How long does hair follicle testing detect drug use?
Hair follicle tests typically detect drug use up to 90 days prior to the test date. This is based on the average rate of hair growth.
Can hair dye or shampoo affect the test results?
No. Standard hair care practices such as dyeing, shampooing, or conditioning do not interfere with lab results. The test measures drug metabolites that are embedded inside the hair shaft.
What if I have no head hair?
In cases where head hair is not available, body hair can be used. Body hair often provides an even longer detection window.
Is the testing process private?
Yes. All testing at Blue Water DRP LLC is conducted with professionalism and discretion. Your results are handled according to strict confidentiality guidelines

How to Prepare for Your Test
Preparing for a drug test involves more than just showing up. Follow these steps to ensure a smooth experience:
- Avoid all prohibited substances: Even over-the-counter medications can sometimes cause false positives.
- Disclose prescriptions: If you're taking any medication, inform the MRO during the review process.
- Stay hydrated: But don’t overdo it, as excessive water intake may result in a diluted sample.
- Be punctual: Especially for our tests, it’s important to arrive within the scheduled time.
Schedule a Hair Follicle Test in Michigan
If you need reliable hair follicle drug testing in Port Huron or anywhere across Michigan, Blue Water DRP LLC is here to help. Our family-owned business has been serving the state since 2009, and we are fully licensed and insured.
Hair follicle testing is available during our standard hours:
Monday through Friday: 6:00 AM to 6:00 PM
Saturday and Sunday: 6:00 AM to 9:00 AM
To schedule your test or ask questions, call Blue Water DRP LLC at (810) 966-0006 or email us at bluewaterdrp@gmail.com. We are committed to providing fast, accurate, and confidential testing to meet your needs.