Service areas
Mobile & on-site testing | Metro county service areas
Based in Rolling Meadows, Illinois, we publish this county list as a practical map for where employer-directed field collections are common—not a hard limit on every address we can reach. Wider travel is often workable depending on the week and your program; list sites in a quote and we'll answer plainly.
Random batches, hiring surges, and incident-driven tests hinge on drive time, who can get on site, and gate rules. The counties below are where that work clusters—alongside demand from warehouses, plants, yards, and transportation employers.
Some employers need one warehouse covered. Others need rotating collections across multiple states during hiring surges.
Why employers use mobile testing across regions
- Fewer clinic trips for crews already on shift
- Easier shift scheduling when draws happen at employer sites
- Support for multi-site hiring and onboarding calendars
- Faster post-incident response when minutes matter
- More consistent collections across branches and warehouses
For distance, after-hours constraints, dispatch planning, and multi-site coordination, start with the locations overview for hub and regional context, then how we plan coverage on this page.
Programs, regions, and next steps
These links tie program detail to the geography above. Your DER or operations lead should still align timing with what the field can support before you authorize a draw.
- Mobile & on-site drug testing
- DOT drug testing
- Non-DOT drug testing
- Post-accident testing
- Reasonable suspicion testing
- Random testing programs
- Breath alcohol testing
- Locations overview
- Midwest regional hub
- Texas Gulf & Houston region
- Southeast Florida
- West Coast regional hub
- Chicago metro
- Joliet & I-80 corridor
- Rockford & northern Illinois
- Employer drug testing FAQ
- Request a quote
- Contact us
Counties we serve
24 counties across 16 states.
Nearby service areas
Optional: use a one-time browser location to surface a few states that are typically closer to you. Nothing is sent to our servers—sorting happens only in your browser. The full county list below is unchanged for everyone.
Don't see your county?
The list is a starting point, not a hard boundary. Send your sites or call—we review distance, access, panel, and calendar the same way we do for listed counties and tell you what is workable.
Arizona
Phoenix Sun Belt growth—construction, manufacturing, and seasonal hiring with dispersed employer sites.
- Maricopa County, AZ
Phoenix Sun Belt growth—construction, manufacturing, and seasonal hiring spikes.
California
Southern California employers tied to port flow, Inland Empire warehouse clusters, and metro office staging.
- Los Angeles County, CA
LA Basin diversified employers—port-adjacent, entertainment-adjacent, and office staging.
- San Bernardino County, CA
Inland Empire warehousing and long-haul staging east of greater Los Angeles.
Florida
Coastal Florida metros—port-linked operations, hospitality hiring, and regional distribution centers.
- Duval County, FL
Jacksonville port, defense-adjacent employers, and Florida–Georgia employer mix.
- Hillsborough County, FL
Tampa Bay distribution, healthcare-adjacent campuses, and regional offices.
- Miami-Dade County, FL
Miami port, hospitality, and international-trade-adjacent employer operations.
Georgia
Atlanta-area air cargo, technology HQs, and Southeast staging for multi-state teams.
- Fulton County, GA
Atlanta tech, air-cargo-adjacent, and Southeast HQ employer concentration.
Illinois
Chicagoland manufacturing, warehouse networks, and intermodal yards where employers batch collections.
- Cook County, IL
Chicago metro core—yards, plants, and HQ-adjacent workplace staging.
- DuPage County, IL
West suburban offices, labs-adjacent sites, and distribution employers.
- Kane County, IL
West suburban Chicago employers, light manufacturing, and regional offices.
- Will County, IL
Joliet / I-80 corridor warehousing and heavy industrial employer activity.
Indiana
Indianapolis-area warehousing and statewide fleet operations on major interstate corridors.
- Marion County, IN
Indianapolis logistics and statewide fleet operations tied to I-65 / I-70.
Iowa
Central Iowa processing, ag-adjacent employers, and cross-country trucking schedules.
- Polk County, IA
Des Moines–area processing, ag-adjacent employers, and cross-country trucking schedules.
Kentucky
Louisville Ohio River commerce and staging between Midwest and Southern employer sites.
- Jefferson County, KY
Louisville Ohio River commerce and Midwest–South employer staging.
Michigan
Southeast Michigan automotive-adjacent plants and cross-border industrial activity.
- Wayne County, MI
Detroit-area automotive-adjacent plants and tooling supplier employers.
New York
NYC-area worksites—from borough facilities to Long Island clusters—with tight urban staging.
- Queens County, NY
NYC borough mixed employers and airport-adjacent workplace collections.
- Suffolk County, NY
Long Island light industry, healthcare support, and suburban workplace clusters.
North Carolina
Charlotte-region finance and Carolinas multi-site operations with interstate access.
- Mecklenburg County, NC
Charlotte finance hub and Carolinas multi-site distribution staging.
Ohio
Columbus-area warehousing and regional distribution employers on east–west industrial corridors.
- Franklin County, OH
Columbus-area warehousing and regional distribution employers on east–west corridors.
Pennsylvania
Lehigh Valley manufacturing between Philadelphia and New York employer markets.
- Lehigh County, PA
Lehigh Valley manufacturing between Philadelphia and New York employer markets.
Tennessee
Memphis rail and highway crossroads for Mid-South distribution activity.
- Shelby County, TN
Memphis Mid-South distribution and rail/highway employer corridors.
Texas
Houston-area port and petrochemical employers alongside Dallas–Fort Worth distribution and corporate campuses.
- Dallas County, TX
DFW corporate campuses, distribution centers, and multi-site warehouse operations.
- Harris County, TX
Houston-area port, petrochemical, and Gulf Coast industrial employer sites.
Wisconsin
Milwaukee-area plants and Lake Michigan–linked staging into Upper Midwest employer networks.
- Milwaukee County, WI
Southeast Wisconsin manufacturing and Upper Midwest distribution activity.
When the map is only part of the story
Quote intake is where to list every address that might need a collector—not just headquarters. We reply with schedules we can honor, field coordination we can staff, and partner collectors when your program and the week allow.
How we plan coverage
Availability shifts by market, season, and program shape—DOT vs non-DOT, observed collections, alcohol sequencing, after-hours needs, weather, and site rules.
Response times and modality choices change with drive time, dispatch load, and staging limits. What works in one county on a calm Tuesday may need a different plan across state lines or during a hiring spike.
Share locations, policy context, and timelines so we can answer with specifics—not a one-size template that skips chain-of-custody and program rules. For regional staging and hub detail, see the locations overview.
Next step for your sites
Request a quote with addresses and program type, or contact us to talk through coverage before you authorize a collection.