| SSAS ID | Organization Name | City | State |
| L0035 | Alliance Source Testing, LLC | Decatur | AL |
| L0036 | Enthalpy Analytical, Inc. | Durham | NC |
| L0037 | Resolution Analytics, Inc. | Fuquay Varina | NC |
| L0038 | Clean Air Engineering, Inc. | Palatine | IL |
| L0039 | TestAmerica Laboratories, Inc. - Knoxville | Knoxville | TN |
| L0040 | Maxxam Analytics Inc. | Coopersburg | PA |
| L0041 | Mosaic Fertilizer (Faustina Main Lab) | St. James | LA |
| L0043 | Atmospheric Analysis & Consulting | Ventura | CA |
| L0044 | Alcoa Massena Operations Chem Lab | Massena | NY |
| L0045 | Alcoa Inc. - Wenatchee Works | Malaga | WA |
| L0046 | Century Aluminum - Mt. Holly | Goose Creek | SC |
| L0047 | Alcoa Inc. - Warrick Operations | Newburgh | IN |
| L0048 | TestAmerica Laboratories, Inc. - Sacramento | West Sacramento | CA |
| L0049 | Eastman Chemical Company | Kingsport | TN |
| L0050 | Emission Technologies, Inc. | Burlington | WA |
| L0051 | LG&E and KU Services Company | Ghent | KY |
| L0052 | Element One, Inc. | Wilmington | NC |
| L0053 | Maxxam Analytics - Mississauga | Mississauga | ON |
| L0054 | Interpoll Laboratories Inc. | Circle Pines | MN |
| L0055 | Triangle Environmental Services, Inc. | Durham | NC |
| L0056 | ALS Environmental - Jacksonville | Jacksonville | FL |
| L0057 | Koogler and Associates, Inc. | Gainesville | FL |
| L0058 | Chester Lab | Tigard | OR |
| L0059 | Timpview Analytical Laboratories | Orem | UT |
| L0060 | Enthalpy Analytical, Inc. - Deer Park | Deer Park | TX |
| L0061 | ALS Environmental - Burlington | Burlington | ON |
| L0062 | Aeros Environmental Inc. | Bakersfield | CA |
| L0063 | Weston Solutions Inc. | Auburn | AL |
| L0064 | Montrose Air Quality Services - Wauconda | Wauconda | IL |
| L0065 | TEI Analytical | Niles | IL |
| L0066 | Materials Analytical Services, LLC | Suwanee | GA |
| L0067 | Southern Environmental Services | Plant City | FL |
| L0068 | Data Analysis Technologies Inc | Plain City | OH |
| L0070 | ALS Environmental - Kelso | Kelso | WA |
| L0071 | Mosaic Fertilizer - Mulberry | Mulberry | FL |
| L0072 | ALS Environmental - Cincinnati | Cincinnati | OH |
| L0073 | Bureau Veritas | Novi | MI |
| L0074 | The Avogadro Group LLC - Antioch | Antioch | CA |
| L0075 | URS Corporation - Santa Ana | Santa Ana | CA |
| L0076 | TETCO | American Fork | UT |
| L0077 | Exova | Santa Fe Springs | CA |
| L0078 | Deeco Inc. | Raleigh | NC |
| L0079 | Air Compliance Testing, Inc. | Brecksville | OH |
| L0080 | Advanced Industrial Resources | Acworth | GA |
| L0081 | Air Quality Services, LLC | Evansville | IN |
| L0082 | Mosaic Fertilizer LLC - Riverview Facility | Riverview | FL |
| L0083 | EEMC | Tucson | AZ |
| L0084 | ASARCO Analytical Lab | Hayden | AZ |
| L0085 | AirNova, Inc. | Pennsauken | NJ |
| L0086 | CF Industries | Plant City | FL |
| L0087 | Metco Environmental | Carrollton | TX |
| L0088 | First Analytical Labs | Raleigh | NC |
| L0089 | PSC Environmental | Hatfield | PA |
| L0090 | Custom Stack Analysis, LLC | Alliance | OH |
| L0091 | URS Corporation - Franklin | Franklin | TN |
| L0092 | EEMC | Billings | MT |
| L0093 | Civil & Environmental Consultants Inc. | Hazelwood | MO |
| L0094 | Tampa Electric Company | Tampa | FL |
| L0095 | Century Aluminum | Hawesville | KY |
| L0096 | Sanders Engineering & Analytical Services, Inc. | Semmes | AL |
| L0097 | Nutrien | Aurora | NC |
| L0098 | Environmental Quality Management | Cincinnati | OH |
| L0099 | Golden Specialty, Inc. - Bellingham | Bellingham | WA |
| L0103 | CB and I | Cincinnati | OH |
| L0104 | Continental Analytical Services | Salina | KS |
| L0105 | Airtech Environmental | Denver | CO |
| L0106 | First Analytical Laboratories | Research Triangle Park | NC |
| L0107 | Curtis & Thompkins | Berkeley | CA |
| L0108 | Kenvirons Inc | Frankfort | KY |
| L0109 | Airtech Environmental Services | Elk Grove Village | IL |
| L0110 | Alliance Source Testing - Arvada | Arvada | CO |
| L0111 | Rubicon Environmental Lab | Geismar | LA |
| L0112 | Environmental Source Samplers | Wilmington | NC |
| L0113 | Ambient Air Services, Inc. | Starke | FL |
| L0114 | White Springs Agricultural Chemicals | White Springs | FL |
| L0115 | Edge Analytical Lab | Burlington | WA |
| L0116 | Alcoa Inc. - Ferndale | Ferndale | WA |
| L0117 | Southern Air Solutions | Knoxville
| TN |
| L0118 | ARDL Inc. | Mt. Vernon | IL |
| L0119 | Entech Engineering Inc. | League City | TX |
| L0120 | SunLabs, Inc. | Tampa | FL |
| L0121 | Air Hygiene International | Broken Arrow | OK |
| L0122 | SGS Environmental Services | Wilmington | NC |
| L0123 | AES Atlanta | Atlanta | GA |
| L0124 | Franklin Engineering Group | Franklin | TN |
| L0125 | Pace Analytical Services - Minneapolis | Minneapolis | MN |
| L0126 | Grace Consulting | Plainfield | IN |
| L0127 | Vista Analytical Laboratory, Inc. | El Dorado Hills | CA |
| L0128 | Armstrong Environmental | Decatur | TX |
| L0129 | Chemtex | Port Arthur | TX |
| L0130 | TRC Environmental | Burr Ridge | IL |
| L0131 | Pace Analytical Services - Indianapolis | Indianapolis | IN |
| L0132 | Mosaic Fertilizer Bartow | Bartow | FL |
| L0133 | Pace Analytical Services - Greenwood | Greenwood | SC |
| L0134 | Intermountain Power | Delta | UT |
| L0135 | Horizon Air Measurement Services, Inc. | Camarillo | CA |
| L0136 | RTI Laboratories | Livonia | MI |
| L0137 | AEP-Dolan Laboratory | Groveport | OH |
| L0138 | Eurofins-SF Analytical Labs | New Berlin | WI |
| L0139 | Kohler Co | Kohler | WI |
| L0140 | American Electric Power - Dolan Chemical Laboratory | Groveport | OH |
| L0141 | Eurofins Frontier Global Services | Bothell | WA |
| L0142 | Environmental Technology & Engineering | Elm Grove | WI |
| L0143 | American Environmental Testing | Spanish Fork | UT |
| L0144 | LSAI Laboratories | Indianapolis | IN |
| L0145 | Inovatia Laboratories, LLC | Fayette | MO |
| L0146 | TRC Solutions - Windsor | Windsor | CT |
| L0147 | Integrity Air Monitoring | Huntersville | NC |
| L0148 | Midwest Laboratories | Omaha | NE |
| L0149 | First Analytical Laboratories | Durham | NC |
| L0150 | Western Environmental Services and Testing, Inc.Casper | | WY |
| L0151 | Consumers Energy, Lab Services | Jackson | MI |
| L0152 | Monsanto Field Analytics | Owensville | MO |
| L0153 | Mostardi Platt | Elmhurst | IL |
| L0154 | Burns & McDonnell Engineering Inc. | Kansas City | MO |
| L0155 | Kokosing Materials, Inc. | Elyria | OH |
| L0156 | Alliance Source Testing | Salt Lake City | UT |
| L0157 | Making Life Smile Organization Corporation | Albuquerque | NM |
| L0158 | Weck Laboratories | Industry | CA |
| L0159 | AM Test Laboratories | Kirkland | WA |
| L0160 | CETCON Inc | Tulsa | OK |
| L0161 | Bison Engineering | Billings | MT |
| L0162 | Alabama Power Company Environmental Laboratory | Calera | AL |
| L0163 | AirKinetics Inc. | Anaheim | CA |
| SSAS ID | Organization Name | City | State |
| T0035 | Alliance Source Testing - Decatur | Decatur | AL |
| T0036 | Mostardi Platt | Elmhurst | IL |
| T0037 | TESTAR Engineering, PC | Raleigh | NC |
| T0038 | Air/Compliance Consultants, Inc. | Pittsburgh | PA |
| T0039 | The Shelly Company | Thornville | OH |
| T0040 | A&H Emission Testing, LLC | Douglassville | PA |
| T0041 | Deeco Inc. | Raleigh | NC |
| T0042 | Montrose Air Quality Services LLC | Liberty Lake | WA |
| T0043 | Clean Air Engineering, Inc. - Palatine | Palatine | IL |
| T0044 | Air Compliance Testing, Inc. | Brecksville | OH |
| T0045 | Emission Testing Services | Baton Rouge | LA |
| T0046 | AECOM Technical Services | Fort Collins | CO |
| T0047 | Emission Technologies, Inc. | Burlington | WA |
| T0048 | Weston Solutions Inc. - West Chester | West Chester | PA |
| T0049 | Industrial Air Science | Dayton | OH |
| T0050 | Providence Engineering and Environmental | Baton Rouge | LA |
| T0051 | Blue Mountain Environmental Management Corporation | Valencia | PA |
| T0052 | Eastman Chemical Company | Kingsport | TN |
| T0053 | LG&E and KU Services Company | Ghent | KY |
| T0054 | Mosaic Fertilizer LLC - Riverview Facility | Riverview | FL |
| T0055 | BT Environmental Consultants | Royal Oak | MI |
| T0056 | Century Aluminum - Mt. Holly | Goose Creek | SC |
| T0057 | Interpoll Laboratories Inc. | Circle Pines | MN |
| T0058 | Koogler and Associates, Inc. | Gainesville | FL |
| T0059 | Peregrine Technical Services | Quakertown | PA |
| T0060 | TRC Environmental - Raleigh | Raleigh | NC |
| T0061 | Montrose Air Quality Services - Wauconda | Wauconda | IL |
| T0062 | Montrose Air Quality Services - Deer Park | Pasadena | TX |
| T0063 | Entec Services, Inc. | Pelham | AL |
| T0064 | AECOM - Morrisville | Morrisville | NC |
| T0065 | TETCO | American Fork | UT |
| T0066 | TRC Environmental - Windsor | Windsor | CT |
| T0067 | TRC Environmental - Burr Ridge | Burr Ridge | IL |
| T0068 | Golden Specialty, Inc. - Bellingham | Bellingham | WA |
| T0069 | Advanced Industrial Resources, Inc. | Marietta | GA |
| T0070 | Air Control Techniques, P.C. | Cary | NC |
| T0071 | GHD Inc. | Niagara Falls | NY |
| T0072 | Aeros Environmental Inc. | Bakersfield | CA |
| T0073 | Weston Solutions Inc. - Auburn | Auburn | AL |
| T0074 | Catalyst Air Management, Inc. | Knoxville | TN |
| T0075 | AirSource Technologies | Shawnee | KS |
| T0076 | Custom Stack Analysis LLC | Alliance | OH |
| T0077 | Metco Environmental | Carrollton | TX |
| T0078 | ALCOA Inc Wenatchee Works | Malaga | WA |
| T0079 | Kokosing Materials Inc | Elyria | OH |
| T0080 | Environmental Source Samplers Inc | Wilmington | NC |
| T0081 | Mosaic New Wales | Mulberry | FL |
| T0083 | AirKinetics Inc | Anaheim | CA |
| T0084 | Civil & Environmental Consultants, Inc. - Charlotte | Charlotte | NC |
| T0085 | CB&I - Cincinnati | Cincinnati | OH |
| T0086 | AECOM - Austin | Austin | TX |
| T0087 | Montrose Air Quality Services - Newport | Newport | DE |
| T0088 | Nutrien | Aurora | NC |
| T0089 | The Air Compliance Group, LLC | Roanoke | VA |
| T0090 | Alcoa Inc. - Warrick Operations | Newburgh | IN |
| T0091 | Network Environmental | Wyoming | MI |
| T0092 | Arrow Environmental Consulting LLC | Easton | PA |
| T0093 | QA Support, LP | La Porte | TX |
| T0094 | Alcoa Inc. - Massena | Massena | NY |
| T0095 | Horizon Engineering | Portland | OR |
| T0096 | The Avogadro Group LLC - Antioch | Antioch | CA |
| T0097 | The Avogadro Group LLC - Beaverton | Beaverton | WA |
| T0098 | Clean Air Engineering, Inc. - Houston | Houston | TX |
| T0099 | Southern Air Solutions Corporation | Knoxville | TN |
| T0103 | Southern Environmental Sciences, Inc. | Plant City | FL |
| T0104 | AECOM - Santa Ana | Santa Ana | CA |
| T0105 | GEL Engineering | Charleston | SC |
| T0106 | Professional Environmental Services, Inc. | Irwindale | CA |
| T0107 | Air Hygiene International | Broken Arrow | OK |
| T0108 | Chief Environmental Group Ltd. | Zanesville | OH |
| T0109 | Bureau Veritas | Novi | MI |
| T0110 | Matus Technical Services | West Grove | PA |
| T0111 | LCH Consulting Associates | Pottstown | PA |
| T0112 | Grace Consulting Inc. - Wellington | Wellington | OH |
| T0113 | Covanta York | York | PA |
| T0114 | Air Quality Services, LLC | Evansville | IN |
| T0115 | Mosaic Fertilizer LLC - Bartow Facility | Bartow | FL |
| T0116 | Environmental Quality Management | Cincinnati | OH |
| T0117 | Air-Tech Environmental, LLC | Durham | NC |
| T0118 | Golden Specialty, Inc. - St. John | St. John | IN |
| T0119 | Alliance Source Testing - Deer Park | Deer Park | TX |
| T0120 | Elemental Air | Medina | MN |
| T0121 | Covanta Essex Company | Newark | NJ |
| T0122 | EEMC | Tucson | AZ |
| T0123 | Airtech Environmental Services | Elk Grove Village | IL |
| T0124 | Montrose Air Quality Services - Easton | Easton | PA |
| T0125 | Integrity Air Monitoring, Inc. | Huntersville | NC |
| T0126 | Myramid Analytical Inc. | Austin | TX |
| T0127 | Ambient Air Services, Inc. | Starke | FL |
| T0128 | AirNova, Inc. | Pennsauken | NJ |
| T0129 | Entec Services, Inc. | Baton Rouge | LA |
| T0130 | Air Analysis, LLC | Lenhartsville | PA |
| T0131 | TRC Environmental - Eagan | Eagan | MN |
| T0132 | Dow Chemical Stack Testing Team | Freeport | TX |
| T0133 | O'Brien & Gere | Syracuse | NY |
| T0134 | AECOM - Oak Ridge | Oak Ridge | TN |
| T0135 | CF Industries | Plant City | FL |
| T0136 | Civil & Environmental Consultants, Inc. - Hazelwood | Hazelwood | MO |
| T0137 | Western Environmental Services and Testing, Inc. | Casper | WY |
| T0138 | Grace Davison | Chicago | IL |
| T0139 | Chevron Products Company | El Segundo | CA |
| T0140 | Imperial Aluminum Minerva, LLC | Minerva | OH |
| T0141 | J R Simplot | Pocatello | ID |
| T0142 | Emerald Kalama Chemical, LLC | Kalama | WA |
| T0143 | Olmstead Waste to Energy | Rochester | MN |
| T0144 | Grace Consulting Inc. - Conover | Conover | NC |
| T0145 | FBT Environmental Services LLC | Paducah | KY |
| T0146 | AECOM - Franklin | Franklin | TN |
| T0147 | Delaware City Refining | Delaware City | DE |
| T0148 | EEMC | Billings | MT |
| T0149 | LEHDER Environmental Services | Point Edward | ON |
| T0150 | TRC Environmental - South Portland | South Portland | ME |
| T0151 | Environmental Laboratories Inc. | Farmingdale | NY |
| T0152 | Empire Stack Testing, LLC | Ashville | NY |
| T0153 | Alliance Source Testing - Arvada | Arvada | CO |
| T0154 | Tampa Electric Company - Air Services Group | Tampa | FL |
| T0155 | C.E.M. Solutions | Hernando | FL |
| T0156 | Century Aluminum | Hawesville | KY |
| T0157 | Derenzo and Associates, Inc. - Livonia | Livonia | MI |
| T0158 | Desert Air | Chandler | AZ |
| T0159 | INTEX Environmental Group | Pipersville | PA |
| T0160 | Sanders Engineering & Analytical Services, Inc. | Semmes | AL |
| T0161 | TRC Environmental - Austin | Austin | TX |
| T0162 | TRC Environmental - Pelham | Pelham | AL |
| T0163 | Weston Solutions Inc. - Exton | Exton | PA |
| T0164 | CF Industries, Inc. - Plant City Phosphate Complex | Plant City | FL |
| T0165 | ARCADIS U.S. Inc. - Branchburg | Branchburg | NJ |
| T0166 | PSEG Laboratory & Testing Services | South Plainfield | NJ |
| T0167 | Advanced Industrial Resources | Acworth | GA |
| T0168 | Kenvirons Inc | Frankfort | KY |
| T0169 | CCI Environmental Consultants, Inc. | Salt Lake City | UT |
| T0170 | ATI Testing | Marietta | GA |
| T0171 | ERM | Franklin | TN |
| T0172 | Air Systems Testing | St. Petersburg | FL |
| T0173 | Catalyst Air Management, Inc. - Douglassville | Douglassville | PA |
| T0174 | Sanders Engineering | Semmes | AL |
| T0175 | Rubicon Stack Testing Group | Geismar | LA |
| T0176 | Alliance Source Testing - Salt Lake City | Salt Lake City | UT |
| T0177 | Wilcox Environmental Engineering | Indianapolis | IN |
| T0178 | Monsanto Field Analytics | Owensville | MO |
| T0179 | White Springs Agricultural Chemicals | White Springs | FL |
| T0180 | CETCON INC. | Tulsa | OK |
| T0181 | M3V LLC | Indianapolis | IN |
| T0182 | Energy and Environmental Measurement Corp. | Tucson | AZ |
| T0183 | Honeywell Engines, Systems and Services | Phoenix | AZ |
| T0184 | Chester Labnet | Tigard | OR |
| T0185 | Maricopa County Air Quality Department | Phoenix | AZ |
| T0186 | Air Consulting Services | Lafayette | IN |
| T0187 | Montrose Services, LLC - dba SCEC Air Quality Specialists | Orange | CA |
| T0188 | Weston Solutions Inc. - Houston | Houston | TX |
| T0189 | Montrose Air Quality Services - Kannapolis | Kannapolis | NC |
| T0190 | ARARCO-Hayden | Hayden | AZ |
| T0191 | TRC Environmental - Woodinville | Woodinville | WA |
| T0192 | Alliance Source Testing - North Little Rock | North Little Rock | AR |
| T0193 | JBR Environmental Consultants | Tempe | AZ |
| T0194 | Horizon Engineering | Auburn | WA |
| T0195 | Mostardi Platt | Concord | NC |
| T0196 | Alliance Source Testing - Salt Lake City | Salt Lake City | UT |
| T0197 | The Air Compliance Group, LLC - Salem | Salem | VA |
| T0198 | Derenzo and Associates, Inc. - East Lansing | East Lansing | MI |
| T0199 | Air Pollution Testing - Murray | Murray | UT
|
| T0200 | ERM-West, Inc. | Greenwood Village | CO |
| T0201 | Air Testing and Consulting, Inc. - Tampa | Tampa
| FL
|
| T0202 | Shintech Louisiana | Plaquemine | LA |
| T0203 | Advanced Air Consultants | Gainesville | GA |
| T0204 | Stack Test Group | Ottowa | IL |
| T0205 | U.S. Army Public Health Command | APG | MD |
| T0206 | MEC Entec Services LLC | Pelham | AL |
| T0207 | Entech Engineering Inc. | League City | TX |
| T0208 | Optimal Air Testing Services | Casper | WY |
| T0209 | Alliance Source Testing - Pittsburgh | Pittsburgh | PA |
| T0210 | SLR International Corporation | Fort Collins | CO |
| T0211 | Element Materials Technology Houston, Inc. | Houston | TX |
| T0212 | Mostardi Platt | Concord | NC |
| T0213 | Aeromet Engineering | Jefferson City | MO |
| T0214 | Armstrong Environmental, Inc. | Decatur | TX |
| T0215 | ERM - Hurricane | Hurricane | WV |
| T0216 | Delta Air Quality Services | Orange | CA |
| T0217 | Stantec | Tempe | AZ |
| T0218 | Pace Analytical Services, Inc. - Minneapolis | Minneapolis | MN |
| T0219 | Alliance Source Testing - Lewisville | Lewisville | TX |
| T0220 | Grace Consulting Inc. - Plainfield | Plainfield | IN |
| T0221 | AmTest Air Quality | Auburn | WA |
| T0222 | Barr Engineering Company | Edina | MN |
| T0223 | Almega Environmental | Cypress | CA |
| T0224 | TRC Environmental - Gainesville | Gainesville | FL |
| T0225 | AirTech Environmental Services | Arvada | CO |
| T0226 | Avagadro Group - Portland | Portland | OR |
| T0227 | Alliance Source Testing - Tyler | Tyler | TX |
| T0228 | Gammie Air Monitoring, LLC - West Simsbury | West Simsbury | CT |
| T0229 | KBD Technic | Cincinnati | OH |
| T0230 | Alaska Source Testing | Anchorage | AK |
| T0231 | American Engineering Testing, Inc. | St. Paul | MN |
| T0232 | Burns & McDonnell | Kansas City | MO |
| T0233 | Pace Analytical Services, Inc. - Abbeville | Abbeville | SC |
| T0234 | Eastmount Environmental Services, LLC | Newburyport | MA |
| T0235 | Air-Tech Environmental | Durham | NC |
| T0236 | DTE Energy | Detroit | MI |
| T0238 | Intermountain Power | Delta | UT |
| T0239 | TRC Environmental - Lowell | Lowell | MA |
| T0240 | Clean Air Engineering, Inc. - Pittsburgh | Pittsburgh | PA |
| T0241 | Horizon Air Measurement Services, Inc. | Camarillo | CA |
| T0242 | TRC Environmental - Houston | Houston | TX |
| T0243 | Technical Compliance Solutions LLC | Dante | VA |
| T0244 | Emissions Measurement Company | Wheat Ridge | CO |
| T0245 | Gammie Air Monitoring, LLC - Newington | Newington | CT |
| T0246 | Coastal Air Consulting, Inc. | DeLand | FL |
| T0247 | Environmental Technical Services | Central Point | OR |
| T0248 | Desert Air Environmental Services - Hillsdale | Hillsdale | MI |
| T0249 | Mosaic Fertilizer LLC - Plant City | Plant City | FL |
| T0250 | CB&I - Baton Rouge | Baton Rouge | LA |
| T0251 | CK Environmmental | Canton | MA |
| T0252 | CB&I - Prairieville | Prairieville | LA |
| T0253 | United Sciences Testing Inc | Warrendale | PA |
| T0254 | Environmental Technology & Engineering Corp | Elm Grove | WI |
| T0255 | The Avagadro Group | Medford | OR |
| T0256 | Alabama Department of Environmental Management (ADEM) | Montgomery | AL |
| T0257 | Environmental Monitoring Laboratories, Inc. | Ridgeland | MS |
| T0258 | Xcel Energy | Amarillo | TX |
| T0259 | Kohler Co | Kohler | WI |
| T0260 | AEP / United Sciences Testing | Warrendale | PA |
| T0261 | Canomara LLC | East Granby | CT |
| T0262 | Grace Consulting Inc. - Ocala | Ocala | FL |
| T0263 | Precison Emissions | Raleigh | NC |
| T0264 | American Environmental Testing | Spanish Fork | UT |
| T0265 | Environmental Services Co | Little Rock | AR |
| T0266 | Great Lakes Castings LLC | Ludington | MI |
| T0267 | Montrose Air Quality Services - Addison | Addison | IL |
| T0268 | Airtech Environmental Services | Denver | CO |
| T0270 | Empire Stack Testing - Angola | Angola | NY |
| T0271 | Clean Combustion and Energy | Lawrence | PA |
| T0272 | Duncan Environmental Services | Holly Springs | NC |
| T0273 | Eurofins Frontier Global Sciences Inc | Bothell | WA |
| T0274 | CEMServices, Inc. | Norton | MA |
| T0275 | Air Testing and Consulting, Inc. - Lakeland | Lakeland | FL |
| T0276 | Bison Engineering - Helena | Helena | MT |
| T0277 | PACE Environmental | Whitehall | PA |
| T0278 | Lemos Labs LLC | Export | PA |
| T0279 | GHD Inc | Niagra Falls | NY |
| T0280 | Avagadro Group LLC - Phoenix | Phoenix | AZ |
| T0281 | Power & Industrial | Lee's Summit | MO |
| T0282 | Bison Engineering - Billings | Billings | MT |
| T0283 | Montrose Air Quality Services - West Palm Beach | West Palm Beach | FL |
| T0284 | Air Pollution Characterization & Control Ltd. | Hermon | ME |
| T0285 | TRC Environmental - Pittsburgh | Monroeville | PA |
| T0286 | Arctic Engineering Ltd | Central Point | OR |
| T0287 | Alliance Source Testing - Hiawatha | Hiawatha | IA |
| T0289 | Tennessee Valley Authority | Chattanooga | TN |
| T0290 | OGE Electric Services -Environmental Operations Testing | Oklahoma City | OK |
| T0291 | Burns & McDonnell | Fenton | MO |
| T0292 | Power & Industrial Service's Corp. | Lee's Summit | MO |
| T0293 | Dicen Consulting and Associates LLC | Leeds | AL |
| T0294 | Consumers Energy Company, Regulatory Compliance Testing Services | West Olive | MI |
| T0295 | Montrose Air Quality Services - Bellingham | Bellingham | WA |
| T0296 | Civil & Environmental Consultants, Inc. - Maryville | Maryville | TN |
| T0297 | Compliance Services, Inc. | Edgewood | IA |
| T0298 | Montrose Air Quality Services - New Braunfels | New Braunfels | TX |
| T0299 | Blue Marble | Newington | CT |
| T0300 | RWDI Air | Guelph | ON |
| T0301 | Grace Consulting Inc. - Nixa | Nixa | MO |
| T0302 | Environmental Consulting Service of Kansas | Leawood | KS |
| T0303 | AECOM - Chelmsford | Chelmsford | MA |
| T0304 | Novinda Holdings | Knoxville | TN |
| T0305 | Montrose Air Quality Services- Baton Rouge | Baton Rouge | LA |
| T0306 | Elemental Air LLC | Kirkland | WA |
| T0307 | RMC Environmental, Inc | Machesney Park | IL |
| T0308 | Lemos Labs | Butler | PA |
| T0309 | Montrose Air Quality Services - Helena | Helena | MT |
| T0310 | ERM-West, Inc. - Ontario | Ontario | CA |
| T0311 | Antec Environmental Services Inc | North Bend | WA |
| T0312 | Technical Compliance Solutions - Kittanning | Kittanning | PA |
| T0313 | SLR International | Fairbanks | AK |
| T0314 | MAQS Newburyport | Newburyport | MA |
| T0315 | Air Compliance Engineering | Raleigh | NC |
| T0316 | Emission Technologies, Inc. - Bellingham | Bellingham | WA |
| T0317 | Ace Environmental Consultants, LLC | Tempe | AZ |
| T0318 | Advanced Environental Compliance | Orange | CA |
| T0319 | Weston Solutions - Willis | Willis | TX |
| T0320 | AECOM Technical Services - Harvard | Harvard | MA |
| T0321 | Alliance Source Testing - Anchorage | Anchorage | AK |
| T0322 | Lemos Labs | Butler | PA |
| T0323 | NATSOL ENVIRONMENTAL SERVICES Pty Ltd | Midrang, Gauteng | SOAF |
| T0324 | McHale Performance | Knoxville | TN |
| T0325 | Air Monitoring Specialists Inc | Richmond | VA |
| T0326 | Bison Engineering | Tucson | AZ |
| T0327 | Best Environmental | Livermore | CA |
| T0328 | Clean Air Engineering, Inc. - Sumner | Sumner | WA |
| T0329 | McHale Performance | Durham | NC |
| T0330 | Alabama Power Company Air Field Services | Calera | AL |
| T0331 | EVREN Northwest Inc | Portland | OR |
| T0332 | Montrose Air Quality Services- Denver | Denver | CO |
| T0333 | Alliance Source Testing - Alabaster | Alabaster | AL |
| T0334 | Barr Engineering - Hibbing | Hibbing | MN |
| T0335 | Soderberg Polytechnic Company, LLC | Kansas City | MO |
| T0336 | Evergy Testing & Analytics | Topeka | KS |
| T0337 | Westar Energy | Topeka | KS |
| T0338 | TRC Environmental - Bismarck | Bismarck | ND |
| T0339 | Mostardi Platt | Denver | CO |
| T0340 | Cooke Companies International | Chapel Hill | NC |
| T0341 | OGE Electric Services-Shawnee | Shawnee | OK |
| SSAS ID | Organization Name | City | State |
| R0020 | New Jersey Department of Environmental Protection | West Trenton | NJ |
| R0021 | Idaho Department of Environmental Quality | Boise | ID |
| R0022 | South Carolina Department of Health and Environmental Control - Bureau of Air Quality | Columbia | SC |
| R0023 | Akron Regional Air Quality Management District | Akron | OH |
| R0024 | Wisconsin Department of Natural Resources - Madison | Madison | WI |
| R0025 | Ohio Environmental Protection Agency-Columbus | Columbus | OH |
| R0026 | Ohio Environmental Protection Agency-Twinsburg | Twinsburg | OH |
| R0027 | Oklahoma Department of Environmental Quality - Oklahoma City | Oklahoma City | OK |
| R0028 | Oregon Department of Environmental Quality - Medford | Medford | OR |
| R0029 | NY State Department of Environmental Conservation | Warrensburg | NY |
| R0030 | Puerto Rico Environmental Quality Board | San Juan | PR |
| R0031 | Kentucky Division for Air Quality | Frankfort | KY |
| R0032 | Oregon Department of Environmental Quality - Salem | Salem | OR |
| R0033 | Michigan DEQ Air Quality Division | Lansing | MI |
| R0034 | Ohio Environmental Protection Agency-Bowling Green | Bowling Green | OH |
| R0035 | Georgia Environmental Protection Division | Atlanta | GA |
| R0036 | San Diego Air Pollution Control District | San Diego | CA |
| R0037 | Pennsylvania Dept of Environmental Protection - Harrisburg | Harrisburg | PA |
| R0038 | Puget Sound Clean Air Agency | Seattle | WA |
| R0039 | Northwest Clean Air Agency | Mt. Vernon | WA |
| R0040 | Louisiana Dept of Environmental Quality | Baton Rouge | LA |
| R0042 | Alaska Dept of Environmental Conservation (ADEC) - Fairbanks | Juneau | AK |
| R0043 | Missouri Department of Natural Resources | Jefferson City | MO |
| R0044 | New Hampshire Department of Environmental Services | Concord | NH |
| R0045 | Regional Air Pollution Control Agency | Dayton | OH |
| R0046 | Indiana Department of Environmental Management | Indianapolis | IN |
| R0047 | Southwest Ohio Air Quality Agency | Cincinnati | OH |
| R0048 | Ohio Environmental Protection Agency-Southeast District | Logan | OH |
| R0049 | Ohio Portsmouth Local Air Agency | Portsmouth | OH |
| R0050 | Minnesota Pollution Control Agency | St. Paul | MN |
| R0051 | Spokane Regional Clean Air Agency | Spokane | WA |
| R0052 | Alabama Department of Environmental Management | Montgomery | AL |
| R0053 | North Carolina Division of Air Quality - Raleigh | Raleigh | NC |
| R0054 | New York State DEC Region 5 | Warrensburg | NY |
| R0055 | Texas Commission on Environmental Quality Region 12 | Houston | TX |
| R0056 | Cleveland Division of Air Quality | Cleveland | OH |
| R0057 | Florida Department of Environmental Protection / Division of Air Resource Management | Tallahassee | FL |
| R0058 | New York State DEC Region 6 | Watertown | NY |
| R0059 | Washington Department of Ecology - Spokane | Spokane | WA |
| R0060 | West Virginia DEP | Charleston | WV |
| R0061 | New York State DEC Central Office | Albany | NY |
| R0062 | San Joaquin Valley APCD - Southern Region | Bakersfield | CA |
| R0063 | Massachusetts DEP Southeast Region | Lakeville | MA |
| R0064 | Florida Department of Environmental Protection - Northwest District | Pensacola | FL |
| R0065 | City of Toledo, Division of Environmental Services | Toledo | OH |
| R0066 | Iowa DNR Air Quality Bureau | Des Moines | IA |
| R0067 | Michigan DEQ - Cadillac Dist | Cadillac | MI |
| R0068 | Delaware Dept of Natural Resources | New Castle | DE |
| R0069 | Virginia Dept of Environmental Quality | Richmond | VA |
| R0070 | Massachusetts DEP Western Region | Springfield | MA |
| R0071 | Hillsborough Environmental Protection (EPC) | Tampa | FL |
| R0072 | Illinois EPA | Des Plaines | IL |
| R0074 | Yolo Solano Air Quality Management District | Davis | CA |
| R0075 | Utah Department of Environmental Quality | Salt Lake City | UT |
| R0076 | South Coast Air Quality Management District | Diamond Bar | CA |
| R0077 | Texas Commission on Environmental Quality Region 10 | Beaumont | TX |
| R0078 | Florida Department of Environmental Protection - Central District | Orlando | FL |
| R0079 | North Carolina Division of Air Quality - Winston-Salem | Winston-Salem | NC |
| R0080 | Washington Department of Ecology - Industrial Section | Olympia | WA |
| R0081 | Nevada Division of Environmental Protection | Carson City | NV |
| R0082 | Olympic Regional Clean Air Agency - Olympia | Olympia | WA |
| R0083 | Arizona Department of Environmental Quality | Phoenix | AZ |
| R0084 | Tennessee Department of Environment and Conservation | Nashville | TN |
| R0087 | Memphis Shelby County Health Dept | Memphis | TN |
| R0088 | Wisconsin DNR - Cumberland Satellite Center | Cumberland | WI |
| R0089 | Bay Area Air Quality Management District | San Francisco | CA |
| R0090 | Texas Commission on Environmental Quality Region 9 | Waco | TX |
| R0091 | New York State DEC Region 7 | Syracuse | NY |
| R0092 | New York State DEC Region 3 | New Paltz | NY |
| R0093 | New York State DEC Region 6 - Utica | Utica | NY |
| R0094 | Arkansas DEQ | Hope | AR |
| R0095 | Texas Commission on Environmental Quality Region 11 | Austin | TX |
| R0096 | Texas Commission on Environmental Quality Region 14 | Houston | TX |
| R0097 | Maryland Dept of the Environment | Baltimore | MD |
| R0098 | Washington Department of Ecology - Yakima | Yakima | WA |
| R0101 | U.S. EPA - Region 1 | Boston | MA |
| R0102 | U.S. EPA - Region 2 | New York | NY |
| R0103 | U.S. EPA - Region 3 | Philadelphia | PA |
| R0104 | U.S. EPA - Region 4 | Atlanta | GA |
| R0105 | U.S. EPA - Region 5 | Chicago | IL |
| R0106 | U.S. EPA - Region 6 | Dallas | TX |
| R0107 | U.S. EPA - Region 7 | Lenexa | KS |
| R0108 | U.S. EPA - Region 8 | Denver | CO |
| R0109 | U.S. EPA - Region 9 | San Francisco | CA |
| R0110 | U.S. EPA - Region 10 | Seattle | WA |
| R0120 | Maine DEP | Augusta | ME |
| R0121 | Forsyth County Office of Environmental Assistance and Protection | Winston-Salem | NC |
| R0122 | Massachusetts DEP Northeast Region | Wilmington | MA |
| R0123 | Southwest Clean Air Agency | Vancouver | WA |
| R0124 | Nebraska DEQ | Lincoln | NE |
| R0125 | Florida Department of Environmental Protection - Southwest District | Temple Terrace | FL |
| R0126 | Minnesota Pollution Control Agency | St. Paul | MN |
| R0128 | Eastern Kern Air Pollution Control District | Bakersfield | CA |
| R0129 | MI DEQ Detroit Field Office | Detroit | MI |
| R0130 | Georgia EPD Air Protection Branch | Atlanta | GA |
| R0131 | Kentucky DEP - Division of Air Quality Bowling Green Division | Bowling Green | KY |
| R0132 | Kansas Dept. of Health & Env. Air Compliance Section - Topeka | Topeka | KS |
| R0133 | Texas Commission on Environmental Quality Region 2 | Lubbock | TX |
| R0134 | Wisconsin Department of Natural Resources - Fitchburg | Fitchburgh | WI |
| R0135 | Florida Department of Environmental Protection - Northeast District | Jacksonville | FL |
| R0136 | Environmental Protection Commission | Tampa | FL |
| R0137 | Montana Department of Environmental Quality - Billings | Billings | MT |
| R0138 | Florida Department of Environmental Protection - Southeast District | West Palm Beach | FL |
| R0139 | Orange County Environmental Protection Division | Orlando | FL |
| R0140 | City of Jacksonville - Environmental Quality Division | Jacksonville | FL |
| R0141 | Utah Dept Air Quality | Salt Lake City | UT |
| R0142 | Miami Dade County Department of Regulatory & Economic Resources, Air Quality Management | Miami | FL |
| R0143 | Florida Department of Environmental Protection - South District | Ft. Myers | FL |
| R0144 | Sacramento Metropolitan Air Quality Management District | Sacramento | CA |
| R0145 | Wyoming DEQ - Lander | Lander | WY |
| R0146 | Maricopa County Air Quality | Phoenix | AZ |
| R0147 | Texas Commission on Environmental Quality Region 4 | Fort Worth | TX |
| R0148 | San Joaquin Valley APCD - Northern Region | Modesto | CA |
| R0149 | OH Regional Air Pollution Control Agency | Dayton | OH |
| R0150 | Missouri DNR, Air Pollution Control Program | Jefferson City | MO |
| R0151 | VA DEQ Tidewater Regional Office | Virginia Beach | VA |
| R0152 | Arkansas DEQ - North Little Rock | North Little RockAR | |
| R0153 | VA DEQ Northern Regional Office | Woodbridge | VA |
| R0154 | Philadelphia Air Management Services | Philadelphia | PA |
| R0155 | VA DEQ Blue Ridge Regional Office | Salem | VA |
| R0156 | Connecticut DEP | Hartford | CT |
| R0157 | Hawaii DOH Clean Air Branch | Honolulu | HI |
| R0158 | Wyoming DEQ - Cheyenne | Cheyenne | WY |
| R0159 | Texas Commission on Environmental Quality Region 13 | San Antonio
| TX |
| R0160 | Mojave Desert AQMD | Victorville
| CA |
| R0161 | Oklahoma Department of Environmental Quality - Tulsa | Tulsa | OK |
| R0162 | New York State DEC Region 2 | Long Island City | NY |
| R0163 | Idaho DEQ Pocatello | Pocatello
| ID
|
| R0164 | Pennsylvania Dept of Environmental Protection - Norristown | Norristown | PA |
| R0165 | Massachusetts DEP Headquarters | Boston | MA |
| R0166 | Florida Department of Health Palm Beach County | West Palm Beach | FL |
| R0167 | North Carolina Division of Air Quality - Fayetteville | Fayetteville | NC |
| R0168 | Air Hygiene | Broken Arrow | OK |
| R0169 | New York State DEC Region 9 | Buffalo | NY |
| R0170 | North Dakota Dept. of Health Division of Air Quality | Bismarck | ND |
| R0171 | USEPA Office of Air Quality Planning & Standards | Research Triangle Park | NC |
| R0172 | Jefferson County Department of Health | Birmingham | AL |
| R0173 | State of MT Dept of Health & Environmental Science | Missoula | MT |
| R0174 | Pinal County AQC District | Florence | AZ |
| R0175 | New York State DEC Region 1 | Stony Brook | NY |
| R0176 | Lincoln Lancaster County Health Dept | Lincoln | NE |
| R0177 | South Dakota DNR - Pierre | Pierre | SD |
| R0178 | New York State DEC Region 3 - White Plains | White Plains | NY |
| R0179 | Pennsylvania Dept of Environmental Protection - York | York | PA |
| R0180 | Wisconsin Department of Natural Resources - Waukesha | Waukesha | WI |
| R0181 | KY Air Pollution Control District | Louisville | KY |
| R0182 | Wyoming DEQ - Casper | Casper | WY |
| R0183 | Texas Commission on Environmental Quality Region 6 | El Paso | TX |
| R0184 | Wisconsin Department of Natural Resources - Wausau | Wausau | WI |
| R0185 | IL Environmental Agency | Springfield | IL |
| R0186 | Vermont Air Quality & Climate Division | Montpelier | VT |
| R0187 | Texas Commission on Environmental Quality - Corpus Christi | Corpus Christi | TX |
| R0188 | Olympic Regional Clean Air Agency - Raymond | Raymond | WA |
| R0189 | Broward County Pollution Prevention Division | Plantation | FL |
| R0190 | Texas Commission on Environmental Quality Region 5 | Tyler | TX |
| R0191 | Montana Department of Environmental Quality - Missoula | Missoula | MT |
| R0192 | Kansas Dept. of Health & Env. Air Compliance Section - Salina | Salina | KS |
| R0193 | Canton City Health Department | Canton | OH |
| R0194 | Pennsylvania Dept of Environmental Protection - Williamsport | Williamsport | PA |
| R0195 | U.S. EPA - Region 8 - Montana Office | Helena | MT |
| R0196 | South Dakota DNR - Vermillion | Vermillion | SD |
| R0197 | VA DEQ Abington Office | Abington | VA |
| R0198 | Alaska Dept of Environmental Conservation (ADEC) - Anchorage | Anchorage | AK |
| R0199 | Wisconsin Department of Natural Resources - Green Bay | Green Bay | WI |
| R0200 | Michigan DEQ - Warren | Warren | MI |
| R0201 | Imperial County APCD | El Centro | CA |
| R0202 | Pacer County APCD | Auburn | CA |
| R0203 | Mississippi Department of Environmental Quality | Jackson | MS |
| R0204 | County of San Luis Obispo APCD | San Luis Obispo | CA |
| R0205 | Shasta County AQMD | Redding | CA |
| R0206 | Great Basin UAPCD | Bishop | CA |
| R0207 | Washington Department of Ecology - Lacey | Lacey | WA |
| R0208 | Colorado CDPHE | Denver | CO |
| R0209 | Knox County Government AQM | Knoxville | TN |
| R0210 | VA DEQ Piedmont | Glen Allen | VA |
| R0211 | Missoula City-County Air Pollution | Missoula | MT |
| R0212 | Illinois EPA - Collinsville | Collinsville | IL |
| R0213 | VA DEQ Valley Regional Office | Harrisonburg | VA |
| R0214 | VA DEQ Lynchburg Office | Lynchburg | VA |
| R0215 | USEPA Region 7 Kansas City | Kansas City | KS |
| R0216 | PA DEP SW Regional Office Pittsburgh | Pittsburgh | PA |
| R0217 | WNC Regional Air Quality Agency | Asheville | NC |
| R0218 | MA-EPA New England Regional Laboratory (SSAS) | North Chelmsford | MA |
| R0219 | City of Omaha DEQ | Omaha | NE |
| R0220 | Wisconsin Department of Natural Resources - Plymouth | Plymouth | WI |
| R0221 | Massachusetts DEP Central Region | Worcester | MA |
| R0222 | New York State DEC Region 8 | Avon | NY |
| R0223 | Wisconsin Department of Natural Resources - Wisconsin Rapids | Wisconsin Rapids | WI |
| R0224 | Linn County Public Health | Cedar Rapids | IA |
| R0225 | Louisville Metro APCD | Louisville | KY |
| R0226 | Northern Sierra AQMD | Grass Valley | CA |
| R0227 | Oregon Department of Environmental Quality - Portland | Portland | OR |
| R0228 | North Coast Unified AQMD | Eureka | CA |
| R0229 | Sisikiyou County APCD | Yreka | CA |
| R0230 | Idaho DEQ Lewiston | Lewiston | ID |
| R0231 | NV-Clark County Dept of Air Quality | Las Vegas | NV |
| R0232 | Pima County DEQ | Tucson | AZ |
| R0233 | Ohio Environmental Protection Agency-Dayton | Dayton | OH |
| R0234 | Texas Commission on Environmental Quality Region 16 | Laredo | TX |
| R0235 | Puerto Rico Environmental Quality Board-Rio Piedras (SSAS) | Rio Piedras | PR |
| R0236 | Oregon Department of Environmental Quality - Bend | Bend | OR |
| R0237 | North Carolina Division of Air Quality - Mooresville | Mooresville | NC |
| R0238 | Mecklenburg County Air Quality | Charlotte | NC |
| R0239 | DC Dept of Environmental Protection | Washington | DC |
| R0240 | Texas Commission on Environmental Quality Region 7 | Midland | TX |
| R0241 | UT DEQ Div of Solid & Hazardous Waste | Salt Lake City | UT |
| R0242 | Chattanooga-Hamilton County APC | Chattanooga | TN |
| R0243 | Pennsylvania Dept of Environmental Protection - Meadville | Meadville | PA |
| R0244 | Idaho DEQ Couerd'Alene | Couerd'Alene | ID |
| R0245 | Texas Commission on Environmental Quality Region 1 | Amarillo | TX |
| R0246 | Washington Department of Ecology - Union Gap | Union Gap | WA |
| R9999 | Not Applicable | | |
develop consensus standards for use by TNI's programs. This group has a support role in assisting other programs with activities such as guidance and standards interpretation.
fosters the generation of data of known and documented quality is through the National Environmental Laboratory Accreditation Program, or NELAP. The purpose of this program is to establish and implement a program for the accreditation of environmental laboratories.
is to establish and maintain a national PT program to support TNI’s National Environmental Laboratory Accreditation Program, and other activities.
Field Activities Program (NEFAP) Executive Committee is to establish and implement an accreditation program for field sampling and measurement organizations (FSMOs).
Audit Sample Program is to develop consensus standards for the manufacture and analysis of audit samples for source emission testing.
on a variety of topics of interest to the environmental measurement community. TNI also hosts two regularly scheduled meetings per year, typically in January and August. Both are a week long and involve open meetings of TNI committees as well as training courses and other special sessions.