| | | Other Names |
| | | Under Which |
| | Jurisdiction of | Conducts |
| Subsidiary | Formation | Business |
| 1755869 ALBERTA ULC | Alberta | |
| 1895548 ONTARIO LIMITED | Ontario | |
| 1922464 ALBERTA LTD. | Alberta | |
| 19TH & LOWER BUCKEYE, LLC | Delaware | |
| 2900 DEDE ROAD, LLC | Maryland | |
| 9164-9608 QUEBEC INC. | Quebec | |
| 9199-5290 QUEBEC INC. | Quebec | |
| A.C.M.S., INC. | Florida | Heart of Florida Environmental |
| ACE SOLID WASTE, INC. | Minnesota | |
| ADVANCED SYSTEMS PORTABLE RESTROOMS, INC. | Oregon | Advanced Mobile Storage |
| | | Advanced Systems Portable Restrooms |
| | | McDonald Portable Toilets |
| ALASKA WASTE-DENALI, LLC | Alaska | |
| ALASKA WASTE-DUTCH HARBOR, LLC | Alaska | |
| ALASKA WASTE-INTERIOR, LLC | Alaska | |
| ALASKA WASTE-JUNEAU, LLC | Alaska | |
| ALASKA WASTE-KENAI PENINSULA, LLC | Alaska | |
| ALASKA WASTE-KETCHIKAN, LLC | Alaska | |
| ALASKA WASTE MAT-SU, LLC | Alaska | |
| ALASKA WASTE-NOME, LLC | Alaska | |
| ALASKA WASTE-SITKA, LLC | Alaska | |
| AMERICAN DISPOSAL COMMERCIAL SERVICES, INC. | Virginia | |
| AMERICAN DISPOSAL COMPANY, INC. | Washington | Vashon Disposal |
| AMERICAN DISPOSAL MAINTENANCE SERVICES, INC. | Virginia | |
| AMERICAN DISPOSAL PROPERTY HOLDINGS, LLC | Delaware | |
| AMERICAN DISPOSAL RECYCLING SERVICES, INC. | Virginia | |
| AMERICAN DISPOSAL ROLL-OFF SERVICES, INC. | Virginia | |
| AMERICAN DISPOSAL SERVICES, INC. | Virginia | |
| AMERICAN DISPOSAL SERVICE OF GEORGIA, INC. | Georgia | |
| AMERICAN DISPOSAL SERVICES OF MARYLAND, INC. | Virginia | |
| AMERICAN DISPOSAL SERVICES OF COLORADO, INC. | Colorado | |
| AMERICAN RECYCLING CENTER, INC. | Virginia | |
| ANDERSON COUNTY LANDFILL, INC. | Delaware | Anderson County Landfill |
| ANDERSON REGIONAL LANDFILL, LLC | Delaware | |
| ARKANSAS RECLAMATION COMPANY, LLC | Arkansas | |
| AULC HOLDINGS, LLC | Delaware | |
| AUSTIN LANDFILL HOLDINGS, INC. | Delaware | |
| BAY DISPOSAL, LLC | Virginia | |
| BAY DISPOSAL HOLDINGS, INC. | Delaware | |
| BAY DISPOSAL PROPERTY HOLDINGS, LLC | Delaware | |
| BETHLEHEM LANDFILL COMPANY | Delaware | Bethlehem Landfill Company |
| BISON BUTTE ENVIRONMENTAL, LLC | Minnesota | |
| BITUMINOUS RESOURCES, INC. | Kentucky | Hopkins County Regional Landfill |
| BLUE RIDGE LANDFILL COMPANY | Pennsylvania | Blue Ridge Landfill Company |
| BRENT RUN LANDFILL, INC. | Delaware | Brent Run Landfill |
| BROADACRE LANDFILL, INC. | Colorado | Pueblo Landfill and Recycling Center |
| BUTLER COUNTY LANDFILL, INC. | Nebraska | |
| CALPET, LLC | Wyoming | |
| CAMINO REAL ENVIRONMENTAL CENTER, INC. | New Mexico | |
| CAPITAL REGION LANDFILLS, INC. | New York | |
| CAROLINA LANDFILL, LLC | South Carolina | |
| CAROLINA PROCESSING & RECYCLING, LLC | South Carolina | |
| CAROLINA WASTE & RECYCLING LLC | South Carolina | |
| CARPENTER WASTE HOLDINGS, LLC | New York | Carpenter Waste |
| | | Carpenter Waste Removal |
| CH4, LLC | Illinois | |
| CHAMBERS DEVELOPMENT OF NORTH CAROLINA, INC. | North Carolina | Anson County Landfill |
| CHAMP LANDFILL COMPANY, LLC | Missouri | Champ Landfill Company |
| CHEROKEE SANITARY LANDFILL COMPANY | Arkansas | Cherokee Sanitary Landfill Company |
| CHIMNEY BUTTE ENVIRONMENTAL L.L.C. | Minnesota | |
| CHIQUITA CANYON, INC. | Delaware | |
| CHIQUITA CANYON, LLC | Delaware | Chiquita Canyon Landfill |
| CLAY BUTTE ENVIRONMENTAL, LLC | Minnesota | |
| CLIFTON ORGANICS, LLC | New York | |
| COLD CANYON LAND FILL, INC. | California | Cold Canyon Processing Facility |
| COLUMBIA RESOURCE CO., L.P. | Washington | |
| COLUMBIA RIVER DISPOSAL, INC. | Washington | Bingen Garbage Service |
| | | Skamania County Sanitary Service |
| COMMUNITY REFUSE DISPOSAL, INC. | Nebraska | |
| COMPLEXE ENVIRO CONNEXIONS LTEE | Canada | |
| CORRAL DE PIEDRA LAND COMPANY | California | |
| COUNTY WASTE -- ULSTER, LLC | New York | Big Top Disposal |
| COUNTY WASTE AND RECYCLING SERVICE, INC. | New York | Ace Carting |
| | | County Waste |
| | | D.J.'s Roll Off Service |
| | | Hardesty and Sons Sanitation |
| | | Spaulding Waste Services |
| | | Superior Waste |
| COUNTY WASTE TRANSFER CORP. | New York | Troy Transfer |
| | | Troy Transfer Station |
| COWLITZ COUNTY LANDFILL, INC. | Washington | |
| CRI HOLDINGS, LLC | Delaware | |
| CURRY TRANSFER & RECYCLING, INC. | Oregon | City Transfer and Recycling |
| | | County Transfer & Recycling |
| | | Country Transfer & Recycling |
| | | Harrell's Septic |
| | | Roto-Rooter of Curry County |
| CWR HOLDINGS, LLC | South Carolina | |
| D.M. DISPOSAL CO., INC. | Washington | American Portable Storage |
| | | D.M. Recycling |
| | | Superior Refuse Removal |
| DENVER REGIONAL LANDFILL, INC. | Colorado | |
| DNCS PROPERTIES, LLC | Arizona | |
| DURHAM REGIONAL LANDFILL, INC. | Delaware | |
| DURHAM REGIONAL LANDFILL, LLC | Arizona | |
| EAGLE FORD RECLAMATION COMPANY, LLC | Texas | |
| ECOSORT, L.L.C. | Oregon | |
| EL PASO DISPOSAL, LP | Texas | El Paso Disposal |
| ELKO SANITATION COMPANY | Nevada | Waste Connections of Nevada |
| EMPIRE DISPOSAL, INC. | Washington | |
| ENTECH ALASKA, LLC | Alaska | |
| ENTERPRISES SANITAIRE F.A. LTEE. | Canada | |
| ENVIRONMENTAL TRUST COMPANY | Tennessee | |
| EVERGREEN DISPOSAL, INC. | Montana | Glacier Disposal |
| FINLEY-BUTTES LIMITED PARTNERSHIP | Oregon | Finley Buttes Landfill Company |
| FINNEY COUNTY LANDFILL, INC. | Delaware | |
| FLORIDA WASTE HOLDINGS, INC. | Delaware | Waste Connections of FL |
| FORT ANN TRANSFER STATION, LLC | New York | |
| FRONT RANGE LANDFILL, INC. | Delaware | Front Range Landfill |
| F.W. DISPOSAL, L.L.C. | Missouri | Valley Park Transfer Station |
| FW DISPOSAL SOUTH, LLC | Missouri | |
| G&P DEVELOPMENT, INC. | Nebraska | |
| GOD BLESS THE USA, INCORPORATED | North Carolina | |
| GOLD RIVER HOLDINGS, LLC | Delaware | |
| GREEN WASTE SOLUTIONS OF ALASKA, LLC | Alaska | |
| GROOT, INC. | Illinois | |
| GROOT INDUSTRIES, INC. | Delaware | |
| GROOT RECYCLING & WASTE SERVICES, INC. | Illinois | Accurate Document Destruction |
| | | Accurate Document Destruction, Inc. |
| GROVELAND TRANSFER AND RECYCLING, INC. | Florida | |
| HAMPTON ROADS RECOVERY CENTER, LLC | Virginia | |
| HARDIN SANITATION, INC. | Idaho | Idaho Garbologist |
| HAROLD LEMAY ENTERPRISES, INCORPORATED | Washington | AA Better Trash & Junk Clean Up |
| | | AA Lucky Portable Storage |
| | | Aberdeen Sanitation Co. |
| | | Butler's Cove Refuse Service |
| | | City Sanitary Co. |
| | | Eastern Grays Harbor Disposal |
| | | EGH Disposal |
| | | Harbor Disposal Co. |
| | | Harold LeMay Enterprises |
| | | HE Recycling |
| | | Joes Refuse Service |
| | | Lakewood Recycling Service |
| | | Lakewood Refuse Service |
| | | LeMay Inc |
| | | LeMay Mobile Shredding |
| | | LeMay Transportation Services |
| | | Pacific Disposal |
| | | Pierce County Refuse |
| | | Recycle Services |
| | | Rural Garbage Service |
| | | White Pass Garbage |
| HIGH DESERT SOLID WASTE FACILITY, INC. | New Mexico | |
| HUDSON VALLEY WASTE HOLDING, INC. | Delaware | |
| IESI-BFC HOLDINGS, INC. | Ontario | |
| ISLAND DISPOSAL, INC. | Washington | Whidbey Recycling Services |
| J BAR J LAND, INC. | Nebraska | |
| LAKESHORE DISPOSAL, INC. | Idaho | |
| LAUREL RIDGE LANDFILL, L.L.C. | Delaware | |
| LEALCO, INC. | Texas | ABC Waste Collection |
| | | Pro Star Waste |
| | | Waste Connections of Texas |
| | | Waste Connections of Texas Rio Grande Valley |
| LES ENTREPRISES RAYLOBEC INC. | Quebec | |
| LIGHTNING BUTTE ENVIRONMENTAL, LLC | Minnesota | |
| LOUISIANA RECLAMATION COMPANY, L.L.C. | Louisiana | |
| LOUISIANA REGIONAL LANDFILL COMPANY | Delaware | Timberlane Landfill Company |
| MADERA DISPOSAL SYSTEMS, INC. | California | Allied Disposal Company |
| | | Avenal Landfill |
| | | Bishop Waste Disposal |
| | | Coastal Rolloff Service |
| | | Riverdale Disposal Service |
| | | Sierra Disposal |
| MAMMOTH DISPOSAL COMPANY | California | |
| MANAGEMENT ENVIRONMENTAL NATIONAL, INC. | Washington | |
| MASON COUNTY GARBAGE CO., INC. | Washington | |
| MBO, LLC | Delaware | Lacassine Oilfield Services |
| MDSI OF LA, INC. | California | |
| MILLENNIUM WASTE INCORPORATED | Indiana | Quad Cities Landfill |
| MISSION COUNTRY DISPOSAL | California | |
| MORRO BAY GARBAGE SERVICE | California | |
| MURREY’S DISPOSAL COMPANY, INC. | Washington | Olympic Disposal |
| NEBRASKA ECOLOGY SYSTEMS, INC. | Nebraska | |
| NOBLES COUNTY LANDFILL, INC. | Minnesota | |
| NORTHWEST CONTAINER SERVICES, INC. | Oregon | |
| OKLAHOMA CITY WASTE DISPOSAL, INC. | Oklahoma | |
| OKLAHOMA LANDFILL HOLDINGS, INC. | Delaware | |
| OSAGE LANDFILL, INC. | Oklahoma | |
| PIERCE COUNTY RECYCLING, COMPOSTING AND DISPOSAL, LLC | Washington | LRI |
| POTRERO HILLS LANDFILL, INC. | California | Potrero Hills Landfill |
| PRAIRIE DISPOSAL LLC | North Dakota | |
| PRAIRIE LIQUIDS, LLC | Delaware | |
| PSI ENVIRONMENTAL SERVICES, INC. | Indiana | PSI WASTE |
| PSI ENVIRONMENTAL SYSTEMS, INC. | Indiana | PSI WASTE |
| PWS FINANCE LUXEMBOURG S.A.R.L. | Luxembourg | |
| R360 ARTESIA, LLC | Delaware | |
| R360 ENVIRONMENTAL SOLUTIONS, LLC | Delaware | |
| R360 ENVIRONMENTAL SOLUTIONS HOLDINGS, INC. | Delaware | |
| R360 ENVIRONMENTAL SOLUTIONS OF LOUISIANA, LLC | Delaware | |
| R360 ENVIRONMENTAL SOLUTIONS OF MISSISSIPPI, LLC | Delaware | |
| R360 ENVIRONMENTAL SOLUTIONS OF TEXAS, LLC | Delaware | |
| R360 ES HOLDINGS, INC. | Delaware | |
| R360 HITCHCOCK, LLC | Delaware | |
| R360 OKLAHOMA, LLC | Delaware | J. Scott Mudd Disposal |
| R360 PERMIAN BASIN, LLC | New Mexico | |
| R360 RED BLUFF, LLC | Texas | |
| R360 SHUTE CREEK, LLC | Delaware | |
| R360 SILO, LLC | Delaware | |
| R360 WILLISTON BASIN, LLC | Delaware | |
| R.A. BROWNRIGG INVESTMENTS, INC. | Oregon | Cascade Disposal Company |
| | | Cascade Recycling Co. |
| | | Kelvic Disposal Co. |
| | | Kelvic Dropbox Company |
| | | Sun Country Disposal |
| RAILROAD AVENUE DISPOSAL, LLC | Delaware | |
| RED CARPET LANDFILL, INC. | Oklahoma | |
| RENSSELAER REGION LANDFILLS, INC. | Delaware | |
| RH FINANCIAL CORPORATION | Washington | |
| RICH VALLEY, LLC | Minnesota | |
| RIDGE (CHATHAM) HOLDINGS G.P. INC. | Canada | |
| RIDGE (CHATHAM) HOLDINGS LP | Manitoba | |
| RIGHT AWAY DISPOSAL, L.L.C. | Arizona | Arizona Sanitation Services |
| | | Sun Lakes Disposal |
| RIP, INC. | Florida | |
| R.J.C. TRUCKING CO. | Oregon | Eugene Drop Box |
| ROCHELLE WASTE DISPOSAL, L.L.C. | Illinois | |
| ROCK RIVER ENVIRONMENTAL SERVICES, INC. | Illinois | |
| ROCK RIVER ENVIRONMENTAL SOLUTIONS, LLC | Illinois | |
| ROLL-OFF EXPRESS, INC. | Maryland | |
| RRD HOLDING COMPANY | Illinois | Disposal Services of Belvidere, Inc. |
| | | G&B Disposal, Inc. |
| | | Gill's Freeport Disposal, Inc. |
| | | Illinois Valley Waste Services, Inc. |
| | | Marengo Disposal Company |
| | | MDC Environmental Services, Inc. |
| | | Northern Illinois Disposal Services, Inc. |
| | | Rock River Disposal Services, Inc. |
| S.A. DUNN & COMPANY, LLC | New York | |
| SANFORD RECYCLING AND TRANSFER, INC. | Florida | |
| SANIPAC, INC. | Oregon | Star Garbage |
| SAN LUIS GARBAGE COMPANY | California | |
| SCOTT SOLID WASTE DISPOSAL COMPANY | Tennessee | Volunteer Landfill |
| SCOTT WASTE SERVICES, LLC | Kentucky | |
| SEABREEZE RECOVERY, INC. | Delaware | Seabreeze Environmental |
| | | Seabreeze Environmental Landfill |
| SECTION 18, LLC | Minnesota | |
| SEDALIA LAND COMPANY | Colorado | |
| SENECA MEADOWS, INC. | New York | |
| SERVICES ENVIRONNEMENTAUX RICHELIEU INC. | Quebec | |
| SHALE GAS SERVICES, LLC | Arkansas | |
| SIERRA HOLDING GROUP, LLC | New York | |
| SIERRA PROCESSING, LLC | New York | |
| SILVER SPRINGS ORGANICS L.L.C. | Washington | |
| SJ RECLAMATION, INC. | Delaware | |
| SKB ENVIRONMENTAL, INC. | Minnesota | Shamrock Trucking |
| SKB ENVIRONMENTAL CLOQUET LANDFILL, INC. | Minnesota | |
| SLD LANDFILL, INC. | Delaware | |
| SMOKY BUTTE ENVIRONMENTAL, LLC | Minnesota | |
| SOUTH COUNTY SANITARY SERVICE, INC. | California | |
| STEAMBOAT CREEK TERMINALS, INC. | Virginia | |
| STUTZMAN REFUSE DISPOSAL INC. | Kansas | |
| SUMTER RECYCLING AND SOLID WASTE DISPOSAL, INC. | Florida | |
| SUN COUNTRY MATERIALS, LLC | Delaware | |
| TACOMA RECYCLING COMPANY, INC. | Washington | |
| TAFT RECYCLING, INC. | Florida | |
| TENNESSEE WASTE MOVERS, INC. | Delaware | TWM-Landfill |
| TEXAS REGIONAL LANDFILL COMPANY LP | Texas | Bowie Transfer Station |
| | | Buffalo Creek Landfill |
| | | East Texas Regional Landfill Company |
| | | Fort Worth C&D Landfill |
| | | Jacksboro Landfill |
| | | Travis County Landfill |
| | | Turkey Creek Landfill |
| | | Weatherford Landfill |
| THUNDER BUTTE ENVIRONMENTAL, LLC | Minnesota | |
| TIMBER RIDGE LANDFILL COMPANY | Missouri | Timber Ridge Landfill Company |
| US LIQUIDS OF LA., L.P. | Delaware | R360 Environmental Solutions, Inc. |
| WASCO COUNTY LANDFILL, INC. | Delaware | |
| WASTE CONNECTIONS BAYOU, INC. | Delaware | Delta Disposals |
| | | WC of Louisiana |
| WASTE CONNECTIONS HOLDINGS LTD. | Canada | |
| WASTE CONNECTIONS LONE STAR, INC. | Texas | Archer Waste |
| | | Corpus Christi Disposal Service |
| | | Crouch Sanitation and Disposal |
| | | Eagle Disposal |
| | | Good Ol' Boys Curbside |
| | | GW Waste Services |
| | | Main Street Disposal |
| | | Salford Disposal |
| | | Skid-O-Kan |
| | | Texas Jack |
| | | Triple H Trash Solutions |
| | | Waste Connections of TX |
| | | Waste Wranglers |
| | | WC of Texas |
| WASTE CONNECTIONS MANAGEMENT SERVICES, INC. | Delaware | |
| WASTE CONNECTIONS OF ALABAMA, INC. | Delaware | Competitive Waste Systems |
| | | Rumsey Environmental |
| WASTE CONNECTIONS OF ALASKA, INC. | Delaware | Alaska Green Waste Solutions |
| | | Alaska Pacific Environmental Services Anchorage |
| | | Alaska Waste |
| | | Alaska Waste - Anchorage |
| | | Alaska Waste Transfer |
| | | Anchorage Refuse |
| | | Commercial Refuse |
| | | DH Transit |
| | | Eagle River Refuse |
| | | Green Waste |
| | | Kodiak Sanitation |
| | | Peninsula Sanitation |
| | | Valley Refuse |
| | | Wasilla Refuse |
| WASTE CONNECTIONS OF ARIZONA, INC. | Delaware | |
| WASTE CONNECTIONS OF ARKANSAS, INC. | Arkansas | WCN of Arkansas |
| WASTE CONNECTIONS OF CALIFORNIA, INC. | California | Amador Disposal Service |
| | | Ebbetts Pass Disposal Service |
| | | El Dorado Disposal Service |
| | | Green Team of Los Angeles |
| | | GreenTeam |
| | | GreenTeam of San Jose |
| | | GreenWaste of Tehama |
| | | SEI Debris Box |
| | | SEI Solid Waste |
| | | West LA Reclamation |
| | | Western El Dorado Recovery Systems |
| WASTE CONNECTIONS OF CANADA INC. | Ontario | |
| WASTE CONNECTIONS OF COLORADO, INC. | Delaware | All Trash Service |
| | | Aspen Waste |
| | | Aspen Waste Systems |
| | | Community Recycling |
| | | Denver Roll-Off Service |
| | | Diamond Disposal |
| | | Eagle Waste & Recycling Service |
| | | Eagle Waste Services |
| | | Eagle Waste Services, Inc. |
| | | Eagle Roll-Off, Inc. |
| | | El Paso Disposal Services |
| | | Fremont Disposal |
| | | Horizon Property Management |
| | | Platte Valley Disposal |
| | | Pueblo Disposal |
| | | Pueblo Disposal & Recycling Service |
| | | Snowy Peaks Trash Company |
| | | Solid Waste Transfer Services |
| | | Southside Landfill |
| | | The Trash Company |
| | | Town & Country Disposal |
| | | U.S. Disposal |
| | | U.S. Disposal Services |
| WASTE CONNECTIONS OF FLORIDA, INC. | Delaware | Good Fella's Roll-Off & Waste Disposal |
| | | Waste Connections of Florida |
| WASTE CONNECTIONS OF GEORGIA, INC. | Delaware | |
| WASTE CONNECTIONS OF IDAHO, INC. | Indiana | Mountain Jack Environmental Services |
| | | T, T & R Enterprises |
| | | Valley Waste and Recycling |
| WASTE CONNECTIONS OF ILLINOIS, INC. | Delaware | Millennium Waste - IL |
| WASTE CONNECTIONS OF IOWA, INC. | Iowa | E-Z Sanitation |
| | | Stone Sanitation |
| | | Town & Country Disposal |
| | | Whaley Waste Systems |
| WASTE CONNECTIONS OF KANSAS, INC. | Delaware | Anderson Trash Service |
| | | Best Yet Refuse |
| | | Collectia LTD. |
| | | Dual County Sanitation |
| | | Northend Disposal |
| | | Plumb Thicket Landfill |
| | | R-Arrow |
| | | Salina Waste Systems |
| | | Schaben Sanitation |
| | | Stutzman Refuse Disposal |
| WASTE CONNECTIONS OF KENTUCKY, INC. | Delaware | Kentucky Waste Systems, Inc. |
| | | Mid-State Recycling Waste Disposal |
| | | Mid-State Recycling Waste Systems |
| | | Mid-State Waste |
| WASTE CONNECTIONS OF LOUISIANA, INC. | Delaware | Delta Disposals |
| | | Diamond Disposal |
| | | Good Neighbor Disposal |
| WASTE CONNECTIONS OF MARYLAND, INC. | Delaware | |
| WASTE CONNECTIONS OF MINNESOTA, INC. | Minnesota | Hendrickson Sanitation |
| | | L & L Sanitation |
| | | Schaap Sanitation |
| | | Scotting Sanitation |
| | | Ulrich Sanitation |
| WASTE CONNECTIONS OF MISSISSIPPI DISPOSAL SERVICES, LLC | Mississippi | |
| WASTE CONNECTIONS OF MISSISSIPPI, INC. | Delaware | Asco Sanitation |
| | | Buck Run Landfill |
| | | Northeast Mississippi Regional Landfill |
| WASTE CONNECTIONS OF MISSOURI, INC. | Missouri | Waste Connections of Cape Girardeau |
| | | Waste Connections of St. Louis |
| | | Waste Connections Timber Ridge |
| WASTE CONNECTIONS OF MONTANA, INC. | Delaware | Bitterroot Disposal |
| | | Valley Recycling |
| | | Victor Transfer |
| WASTE CONNECTIONS OF NEBRASKA, INC. | Delaware | Allied Refuse |
| | | Art's Garbage Service |
| | | B&B Sanitary Service |
| | | Big Red Roll Off |
| | | Central Waste Disposal |
| | | Countryside Services |
| | | Duren Sanitation |
| | | J&J Sanitation |
| | | Junk in the Box |
| | | Midwest Refuse Service Commercial |
| | | Omega Systems |
| | | Papillion Sanitation |
| | | Sanitation Systems |
| | | Saunders County Disposal |
| | | Schaben Sanitation |
| | | SGS Sanitation |
| | | Shrader Refuse and Recycling Service Company |
| | | Steve's Sanitation |
| | | Steve's Sanitation Service |
| | | The Garbage Company |
| | | Ummel Sanitation |
| | | Wahoo Sanitation |
| | | White Sanitation |
| WASTE CONNECTIONS OF NEW JERSEY, INC. | Delaware | |
| WASTE CONNECTIONS OF NEW MEXICO, INC. | Delaware | Silva Sanitation |
| | | Southwest Disposal |
| WASTE CONNECTIONS OF NEW YORK, INC. | Delaware | County Waste |
| | | Waste Connections |
| WASTE CONNECTIONS OF NORTH CAROLINA, INC. | Delaware | Queen City Transfer Station |
| | | Waste Connections of the Carolinas |
| WASTE CONNECTIONS OF NORTH DAKOTA, INC. | Delaware | Armstrong Sanitation Plus |
| WASTE CONNECTIONS OF OKLAHOMA, INC. | Oklahoma | B & B Sanitation |
| | | Metropolitan Waste Services |
| | | Oklahoma Disposal & Sanitation |
| | | Waste Connections |
| WASTE CONNECTIONS OF OREGON, INC. | Oregon | American Sanitary Service |
| | | Arrow Sanitary Service |
| | | Babe's Garbage Service |
| | | Bandon Disposal & Recycling |
| | | Clatskanie Sanitary Service |
| | | EWSI |
| | | Environmental Waste Systems |
| | | Hood River Garbage Service |
| | | Hudson Portable Toilet Service |
| | | Hudson Garbage Service |
| | | Hudson's Garbage Service |
| | | Les' County Sanitary |
| | | Les' Sanitary Service |
| | | North Bend Sanitation Service |
| | | Oregon Paper Fiber |
| | | Public Disposal and Recyling Center |
| | | Sweet Home Sanitation Service |
| | | Sweet Home Transfer & Recycling |
| | | The Dalles Disposal |
| | | The Dalles Transfer Station |
| | | Wally's Portable Restrooms |
| WASTE CONNECTIONS OF OSCEOLA COUNTY, LLC | Florida | J.E.D. Landfill |
| WASTE CONNECTIONS OF PENNSYLVANIA, INC. | Delaware | Waste Connections of Pennsylvania |
| WASTE CONNECTIONS OF RHODE ISLAND, INC. | Delaware | Patriot Disposal |
| | | Patriot Hauling |
| WASTE CONNECTIONS OF SOUTH CAROLINA, INC. | Delaware | Waste Connections of the Carolinas |
| WASTE CONNECTIONS OF SOUTH DAKOTA, INC. | South Dakota | A & C Keiffer Sanitation |
| | | Art's Garbage Service |
| | | Cook's Wastepaper & Recycling |
| | | Dakota Data Shred |
| | | Envirotech Waste Services |
| | | Kieffer Sanitation |
| | | Novak Enterprises |
| | | Novak Sanitary Service |
| | | Pierre Recycling Center |
| | | Ron's Dray |
| | | Sioux Valley Sanitation Service |
| | | Steve's Garbage Service |
| | | Walker Refuse |
| WASTE CONNECTIONS OF TENNESSEE, INC. | Delaware | Asco Sanitation |
| | | Clarksville Disposal |
| | | Cumberland Waste |
| | | Cumberland Waste Disposal |
| | | Ocoee Environmental Services |
| | | Scott Solid Waste |
| | | Southern Disposal |
| WASTE CONNECTIONS OF TEXAS, LLC | Delaware | Caprock Waste |
| | | Hardy Road Transfer Station |
| | | Hill Country Refuse |
| | | Vaquero Waste & Recycling |
| | | Waste Connections of Texas |
| | | West Texas Disposal |
| WASTE CONNECTIONS OF UTAH, INC. | Delaware | City Sanitation |
| | | Roche & Sons |
| WASTE CONNECTIONS OF WASHINGTON, INC. | Washington | Buchmann Sanitation Service |
| | | Empire Disposal Hauling |
| | | Lakeside Disposal & Recycling Company |
| | | The Disposal Group |
| | | Triangle Resources |
| | | Twin City Sanitary Service |
| | | Vancouver Sanitary Service |
| | | Waste Connections of Spokane |
| WASTE CONNECTIONS OF WYOMING, INC. | Delaware | American Disposal |
| | | American Disposal, Inc. |
| | | BW Waste |
| | | Edwal Services |
| | | Green River Valley Refuse |
| | | Kieffer Sanitation |
| | | Ryan Sanitation |
| WASTE CONNECTIONS PALMETTO, INC. | Delaware | |
| WASTE CONNECTIONS US, INC. | Delaware | |
| WASTE CONNECTIONS US HOLDINGS, INC. | Delaware | |
| WASTE INNOVATIONS, LLC | Arizona | Waste Innovations |
| | | Waste Innovations Leasing |
| WASTE REDUCTION SERVICES, L.L.C. | Oregon | |
| WASTE SERVICES OF N.E. MISSISSIPPI, INC. | Mississippi | |
| WASTE SOLUTIONS GROUP OF SAN BENITO, LLC | Delaware | John Smith Road Landfill |
| WATERWAY TRAILS INC. | Texas | |
| WCI AUSTIN LANDFILL, LLC | Minnesota | |
| WCI-WHITE OAKS LANDFILL, INC. | Delaware | White Oaks Landfill |
| WCN ACQUISITION SUB JANUARY 2017, INC. | Texas | |
| WCN DE LP CORPORATION | Delaware | |
| WCN TX GP CORPORATION | Delaware | |
| WEST BANK ENVIRONMENTAL SERVICES, INC | Indiana | Leftovers of Wyoming |
| | | Westbank Sanitation |
| WEST COAST RECYCLING AND TRANSFER, INC. | Oregon | Public Disposal and Recycling Center |
| | | Store-It |
| WEST VALLEY COLLECTION & RECYCLING, LLC | California | |
| WINNEBAGO LANDFILL COMPANY, LLC | Illinois | |
| WINNEBAGO RECLAMATION SERVICE, INC. | Illinois | |
| WYOMING ENVIRONMENTAL SERVICES, INC. | Indiana | Wyoming Waste Systems |
| YAKIMA WASTE SYSTEMS, INC. | Washington | |
