DOT-COMPLIANT · ON-SITE EMPLOYER DRUG TESTING
Williston, ND Mobile Drug & Alcohol Testing
Bakken crude oil CDL tanker fleets · PHMSA pipeline operators · Oilfield services and well site employers · Construction and man-camp workforces · Same-day dispatch available
Williston sits at the heart of the Williston Basin in Williams County, ground zero for North Dakota's Bakken and Three Forks oil formations that transformed this small city into one of the most economically active employer markets in the country. CDL tanker truck drivers hauling crude oil around the clock on US-2 and US-85, pipeline construction and maintenance crews working PHMSA-regulated gathering and transmission systems, oilfield service companies running equipment and personnel to well sites across a 200-mile radius, and construction contractors building processing facilities, man-camps, and infrastructure throughout McKenzie, Williams, and Mountrail Counties - all of these workforces require DOT-compliant, post-accident-ready drug and alcohol testing that cannot wait for an employee to drive an hour to the nearest clinic. Williston is a market where every employer already knows they need testing; the only question is finding a provider who will actually come to the site. OnSite Employer Testing dispatches mobile collectors to Williston well sites, pipeline staging areas, fleet yards, and employer locations throughout the Bakken corridor when routing and collector availability allow - we confirm what is realistic before you hold the calendar.
OnSite Employer Testing coordinates mobile drug testing collections at your Williston-area facility, yard, terminal, or job site. We do not operate a clinic. Review how it works or browse all locations we serve across the region.
Williston is the epicenter of the Bakken oil patch - the most drug-testing-intensive employer environment per capita in the United States - where mobile on-site collection is not a convenience but an operational necessity.
DOT & Non-DOT Testing Services — Williston
We coordinate the following collections for Williston-area employers:
- PHMSA-compliant drug & alcohol testing (49 CFR Part 199) - pipeline operators and natural gas gathering system employers in the Bakken corridor
- DOT urine drug testing (49 CFR Part 40) - FMCSA CDL tanker operators hauling crude oil on US-2, US-85, and US-1804
- Non-DOT workplace drug testing - oilfield services, well site construction, and man-camp employer panels
- Post-accident drug & alcohol testing - dispatched to well sites, pipeline staging areas, and yards throughout Williams County
- Reasonable suspicion testing - on-site at your Williston facility or field staging area on supervisor or safety officer direction
- Random testing program collections - scheduled around oilfield crew rotations, tanker dispatch windows, and pipeline shift changes
- Breath alcohol testing (BAT/SAAT) - FMCSA and PHMSA-compliant for Williston-area regulated employer programs
- Pre-employment drug testing collections - for oilfield services, pipeline contractor, and CDL tanker new-hire onboarding at your site
Industries Served in Williston
- Crude oil production and oilfield services - Bakken and Three Forks formation operators and service companies in Williams County
- CDL tanker fleets - crude oil trucking on US-2, US-85, and the Williston Basin road network
- Pipeline operations and construction - PHMSA-regulated gathering, transmission, and processing employers in the Bakken corridor
- Construction and infrastructure - well pad construction, processing facility build-out, and man-camp employer contractors
- Energy support services - water hauling, sand and proppant transport, and field logistics employers
Applicable Regulations - Williston, ND
Williston's employer base carries the broadest DOT regulatory exposure of any small city in the country. Pipeline operators carrying crude oil, natural gas, and produced water on regulated systems follow 49 CFR Part 199 (PHMSA), which requires drug and alcohol testing for covered employees in operations, maintenance, and emergency response. CDL tanker drivers on US-2 and US-85 follow 49 CFR Part 382 (FMCSA). HAZMAT endorsement holders transporting crude oil or flammable liquids are subject to enhanced random pool inclusion under 49 CFR Part 382.305. All DOT collections follow 49 CFR Part 40. Non-DOT oilfield service workers are covered by company policy and operator contractor qualification programs - most major Bakken operators (Continental Resources, Hess, Burlington Resources) require their contractors to maintain drug-free workplace programs as a condition of well site access. North Dakota does not have a recreational cannabis law. North Dakota's medical marijuana program (N.D. Century Code Chapter 19-24.1) does not require employers to accommodate cannabis use in safety-sensitive or DOT-regulated positions. A positive THC result under any DOT program is a federal violation regardless of a North Dakota medical marijuana card. Program design remains the employer's responsibility.
On-Site Collections in Williston
From Bakken crude oil tanker yards to PHMSA pipeline staging areas to well site construction contractors across Williams County, request a quote and we will be direct about routing availability and dispatch timing for your Williston locations.
Use our instant quote calculator to scope your collection or visit our service areas page for broader coverage context.
Questions from employers in this region
We run CDL tanker trucks hauling crude oil out of Williston on US-2 and US-85 - can you come to our yard for post-accident and random collections without sending drivers to a clinic 60 miles away?
That is exactly the problem we are built to solve in markets like Williston. Provide your yard address, CDL driver pool size, and your preferred window at booking. We confirm routing and collector availability before you hold the calendar. For post-accident dispatch, call us immediately after the scene is safe - DOT post-accident timing under 49 CFR Part 382.303 requires alcohol testing within 8 hours and drug testing within 32 hours. Do not delay.
We operate a crude oil gathering pipeline in Williams County - what testing does PHMSA require for our employees?
PHMSA testing under 49 CFR Part 199 covers employees performing operations, maintenance, or emergency response on regulated pipeline facilities. Required testing includes pre-employment, random, post-accident, reasonable cause, return-to-duty, and follow-up testing. PHMSA random testing rates and some program requirements differ from FMCSA rules. We perform on-site collections for PHMSA-covered programs at your Williston-area pipeline facilities. Program design, covered employee determinations, and MRO selection remain your responsibility.
Our oilfield service company requires all well site workers to be drug tested as a condition of operator site access - can you handle that testing at our Williston staging area?
Yes. Non-DOT pre-employment and random testing for oilfield service companies is a core use case for our mobile service. Provide your staging area address, expected headcount, and your program type at booking. We confirm routing and dispatch timing to your Williams County location before you commit to the schedule.
Core programs: Mobile & on-site drug testing, DOT drug testing, Non-DOT drug testing, Post-accident testing, Reasonable suspicion testing, Random testing programs, Breath alcohol testing. Planning: how it works, instant quote calculator, all locations. Industries: employer industries we support. Long-form answers: Employer drug testing FAQ. Quick questions: Contact us.
For how we think about regions and feasibility, see service areas.
Nationally coordinated collection support
OnSite Employer Testing is headquartered in Illinois and coordinates mobile and on-site employer testing across selected regions and employer locations—including through partner collectors when your program, timing, and geography allow. Availability depends on location, timing, test type, site access, collector availability, and scheduling needs.
Mobile Drug Testing for Williston's Oil Patch, Pipeline, and Tanker Fleet Employers
From Bakken crude oil tanker yards to PHMSA pipeline staging areas to well site construction contractors across Williams County, request a quote and we will be direct about routing availability and dispatch timing for your Williston locations.