Houston, Texas Drug Testing Services


Houston, Texas Drug Screening & Workplace Testing Services

Why Choose WSI in Houston, Texas?

Our Services in Houston, Texas

Drug Testing

Random Management Programs

Physical Exams

Specialized Testing

Expert Training Programs

Background Check Services

FMCSA Clearinghouse Compliance Support

Interested? Contact Us

Our Locations in Houston, Texas

NameAddressCityStateZIP Code
WSI Testing Location2101 Crawford Street Houston Texas 77002
WSI Testing Location407 FANNIN Houston Texas 77002
WSI Testing Location2004 Leeland Street Houston Texas 77003
WSI Testing Location2117 Chenevert Street Houston Texas 77003
WSI Testing Location1200 Binz Street Houston Texas 77004
WSI Testing Location3300 Crawford Street Houston Texas 77004
WSI Testing Location5568 Weslayan Street Houston Texas 77005
WSI Testing Location2505 Dunlavy Street Houston Texas 77006
WSI Testing Location107 Yale Street Houston Texas 77007
WSI Testing Location5151 Katy Freeway Houston Texas 77007
WSI Testing Location102 West 11th Street Houston Texas 77008
WSI Testing Location1635 North Loop West Freeway Houston Texas 77008
WSI Testing Location1919 North Loop West Houston Texas 77008
WSI Testing Location1919 North Loop West Freeway Houston Texas 77008
WSI Testing Location2136 Yale Street Houston Texas 77008
WSI Testing Location2902 N Shepherd Dr Houston Texas 77008
WSI Testing Location300 N LOOP WEST Houston Texas 77008
WSI Testing Location427 West 20th Street Houston Texas 77008
WSI Testing Location635 W. 19TH STREET Houston Texas 77008
WSI Testing Location9200 Hempstead Rd Houston Texas 77008
WSI Testing Location900 BROADWAY ST Houston Texas 77012
WSI Testing Location14503 Bammel North Houston Road Houston Texas 77014
WSI Testing Location3845 Cypress Creek Parkway Houston Texas 77014
WSI Testing Location1140 WESTMONT DR STE 510 Houston Texas 77015
WSI Testing Location1140 WESTMONT STE. 505 Houston Texas 77015
WSI Testing Location13125 EAST FREEWAY Houston Texas 77015
WSI Testing Location13259 E. FREEWAY Houston Texas 77015
WSI Testing Location13259 EAST FREEWAY Houston Texas 77015
WSI Testing Location13469 I-10 East Houston Texas 77015
WSI Testing Location13526 East Freeway Houston Texas 77015
WSI Testing Location13550 East Freeway Houston Texas 77015
WSI Testing Location13601 WOODFOREST BLVD Houston Texas 77015
WSI Testing Location388 Uvalde Road Houston Texas 77015
WSI Testing Location10311 Homestead Road Houston Texas 77016
WSI Testing Location3520 Broadway Street Houston Texas 77017
WSI Testing Location8505 GULF FREEWAY Houston Texas 77017
WSI Testing Location1005 Waugh Drive Houston Texas 77019
WSI Testing Location7117 Lyons Avenue Houston Texas 77020
WSI Testing Location910 South Wayside Drive Houston Texas 77023
WSI Testing Location12385 Kingsride Lane Houston Texas 77024
WSI Testing Location855 Frostwood Drive Houston Texas 77024
WSI Testing Location921 Gessner Road Houston Texas 77024
WSI Testing Location9563 South Main Street Houston Texas 77025
WSI Testing Location10909 East Freeway Houston Texas 77029
WSI Testing Location11040 East Freeway Houston Texas 77029
WSI Testing Location1717 Turning Basin Drive Houston Texas 77029
WSI Testing Location8799 N. LOOP EAST Houston Texas 77029
WSI Testing Location2282 W HOLCOMBE BLVD Houston Texas 77030
WSI Testing Location6411 FANNIN Houston Texas 77030
WSI Testing Location6411 Fannin Street Houston Texas 77030
WSI Testing Location7000 Fannin Street Houston Texas 77030
WSI Testing Location7007 BERTNER AVENUE (1MC2.2190) Houston Texas 77030
WSI Testing Location12885 GULF FREEWAY Houston Texas 77034
WSI Testing Location7211 Regency Square Boulevard Houston Texas 77036
WSI Testing Location7447 Harwin Drive Houston Texas 77036
WSI Testing Location9898 Bissonnet St Houston Texas 77036
WSI Testing Location11120 North Freeway Houston Texas 77037
WSI Testing Location14825 Northwest Freeway Houston Texas 77040
WSI Testing Location17376 Northwest Freeway Houston Texas 77040
WSI Testing Location17410 NW. FREEWAY Houston Texas 77040
WSI Testing Location7207 Gessner Road Houston Texas 77040
WSI Testing Location11050 West Little York Road Houston Texas 77041
WSI Testing Location6360 West Sam Houston Parkway North Houston Texas 77041
WSI Testing Location12401 South Post Oak Road Houston Texas 77045
WSI Testing Location1414 S Loop W Houston Texas 77054
WSI Testing Location2626 South Loop West Houston Texas 77054
WSI Testing Location2636 South Loop West Houston Texas 77054
WSI Testing Location2646 S Loop W Fwy Houston Texas 77054
WSI Testing Location1000 North Post Oak Road Houston Texas 77055
WSI Testing Location9742 Katy Freeway Houston Texas 77055
WSI Testing Location2960 Sage Road Houston Texas 77056
WSI Testing Location1111 AUGUSTA DRIVE Houston Texas 77057
WSI Testing Location2641 Winrock Boulevard Houston Texas 77057
WSI Testing Location5901 Westheimer Road Houston Texas 77057
WSI Testing Location1202 East Nasa Parkway Houston Texas 77058
WSI Testing Location16630 Imperial Valley Dr Houston Texas 77060
WSI Testing Location367 GREENS ROAD Houston Texas 77060
WSI Testing Location401 Greens Road Houston Texas 77060
WSI Testing Location505 North Sam Houston Parkway East Houston Texas 77060
WSI Testing Location515 North Sam Houston Parkway East Houston Texas 77060
WSI Testing Location654 N SAM HOUSTON PKWY E STE 1 Houston Texas 77060
WSI Testing Location2323 CLEAR LAKE CITY BLVD Houston Texas 77062
WSI Testing Location9668 Westheimer Road Houston Texas 77063
WSI Testing Location9900 WESTPARK DR Houston Texas 77063
WSI Testing Location17557 Tomball Parkway Houston Texas 77064
WSI Testing Location9138 West Road Houston Texas 77064
WSI Testing Location10680 Jones Rd Houston Texas 77065
WSI Testing Location11301 Fallbrook Dr Houston Texas 77065
WSI Testing Location11811 FM 1960 RD W STE 130 Houston Texas 77065
WSI Testing Location13141 FM 1960 RD W Houston Texas 77065
WSI Testing Location12830 Willow Centre Drive Houston Texas 77066
WSI Testing Location10850 Louetta Road Houston Texas 77070
WSI Testing Location10906 Farm to Market 1960 Houston Texas 77070
WSI Testing Location13215 Dotson Rd Houston Texas 77070
WSI Testing Location1920 Rankin Road Houston Texas 77073
WSI Testing Location2010 Farm to Market 1960 Houston Texas 77073
WSI Testing Location6440 Hillcroft Street Houston Texas 77074
WSI Testing Location6535 SOUTH WEST FREEWAY Houston Texas 77074
WSI Testing Location6535 SW. FREEWAY Houston Texas 77074
WSI Testing Location6545 Southwest Freeway Houston Texas 77074
WSI Testing Location8200 Wednesbury Lane Houston Texas 77074
WSI Testing Location8313 Southwest Fwy Houston Texas 77074
WSI Testing Location8498 South Sam Houston Parkway East Houston Texas 77075
WSI Testing Location11807 Westheimer Road Houston Texas 77077
WSI Testing Location13410 Briar Forest Drive Houston Texas 77077
WSI Testing Location1500 South Dairy Ashford Road Houston Texas 77077
WSI Testing Location11511 Katy Freeway Houston Texas 77079
WSI Testing Location11621 Katy Freeway Houston Texas 77079
WSI Testing Location12345 KATY FREEWAY Houston Texas 77079
WSI Testing Location14045 Memorial Drive Houston Texas 77079
WSI Testing Location14770 Memorial Drive Houston Texas 77079
WSI Testing Location5420 Dashwood Dr Houston Texas 77081
WSI Testing Location12121 Richmond Ave Houston Texas 77082
WSI Testing Location2703 HIGHWAY 6 SOUTH Houston Texas 77082
WSI Testing Location3226 South Briar Knoll Drive Houston Texas 77082
WSI Testing Location16526 Park Row Drive Houston Texas 77084
WSI Testing Location1718 Fry Road Houston Texas 77084
WSI Testing Location19002 Park Row Houston Texas 77084
WSI Testing Location4526 Highway 6 North Houston Texas 77084
WSI Testing Location6969 GULF FREEWAY, SUITE 370 Houston Texas 77087
WSI Testing Location10930 Resource Parkway Houston Texas 77089
WSI Testing Location11717 HIGHLAND MEADOW DR Houston Texas 77089
WSI Testing Location11800 Astoria Boulevard Houston Texas 77089
WSI Testing Location1000 Cypress Creek Parkway Houston Texas 77090
WSI Testing Location1000 Farm to Market 1960 Road West Houston Texas 77090
WSI Testing Location110 Cypress Station Drive Houston Texas 77090
WSI Testing Location14755 I-45 N Houston Texas 77090
WSI Testing Location15621 Blue Ash Drive Houston Texas 77090
WSI Testing Location17030 NANES DR Houston Texas 77090
WSI Testing Location17070 Red Oak Dr Houston Texas 77090
WSI Testing Location411 Lantern Bend Drive Houston Texas 77090
WSI Testing Location710 Farm to Market 1960 Road West Houston Texas 77090
WSI Testing Location10961 NW. FREEWAY Houston Texas 77092
WSI Testing Location19450 Katy Freeway Houston Texas 77094
WSI Testing Location8100 HIGHWAY 6 N Houston Texas 77095
WSI Testing Location4936 Beechnut Street Houston Texas 77096
WSI Testing Location5895 South Braeswood Boulevard Houston Texas 77096
WSI Testing Location9940 W. SAM HOUSTON PKWY. S. STE 320 Houston Texas 77099
WSI Testing Location9940 West Sam Houston Parkway South Houston Texas 77099
WSI Testing Location1450 Kingwood Drive Houston Texas 77339