| Date | Grid | Clue | Author |
| Wed Apr 17, 2024 | 66D | Lead regulator, for short | Joseph Gangi |
| Sat Feb 24, 2024 | 29A | Org. that regulates fertilizers | Rebecca Goldstein and Rafael Musa |
| Wed Feb 7, 2024 | 65D | Org. with an Office of Water (4) | Daniel Mauer |
| Sun Jan 7, 2024 | 37D | Superfund grp. | Michael Schlossberg |
| Tue Jan 2, 2024 | 1A | Green letters? | Jeffrey Martinovic |
| Mon Nov 13, 2023 | 59D | Org. concerned with emissions (2) | Benjamin Fink |
| Thu Nov 9, 2023 | 31D | Org. with grants for asbestos removal | Simeon Seigel |
| Mon Sep 25, 2023 | 34A | Org. that regulates hazardous waste | Lynn Lempel |
| Sun Aug 20, 2023 | 125A | Grp. that measures 1-Across | Michael Schlossberg |
| Sun Jul 9, 2023 | 60A | Org. created the same year as Earth Day | Christina Iverson |
| Tue Jun 6, 2023 | 64A | Org. established by Nixon (3) | Daniel Jaret |
| Mon Jun 5, 2023 | 60D | Clean Air Act enforcer, for short | Eric Rollfing |
| Sun May 28, 2023 | 69A | Grp. regulating pesticides | Chandi Deitmer and Taylor Johnson |
| Thu Apr 27, 2023 | 40D | Greenhouse gas regulator, for short | Michael Schlossberg |
| Mon Mar 27, 2023 | 65D | Org. with pollution solutions | Simon Marotte and Trenton Lee Stewart |
| Sun Mar 19, 2023 | 110D | Org. established by 111-Down | Robert Ryan |
| Mon Feb 20, 2023 | 22D | Government grp. employing ecologists | Emily Carroll |
| Tue Jan 10, 2023 | 64D | Energy-monitoring org. | Emily Rourke |
| Thu Sep 22, 2022 | 57D | Clean water org. | Helen Chen |
| Sun Sep 18, 2022 | 90A | Clean Air Act org. (6) | Katie Hale |
| Tue Sep 13, 2022 | 53D | Clean air org. (10) | Adam Wagner |
| Wed Jul 27, 2022 | 64D | Clean Air Act org. (6) | Enrique Henestroza Anguiano |
| Thu Apr 14, 2022 | 11D | Water monitoring grp. | Ashish Vengsarkar and Narayan Venkatasubramanyan |
| Sat Mar 5, 2022 | 27A | Org. created in the wake of "Silent Spring" | Nam Jin Yoon |
| Sun Jan 2, 2022 | 108D | Clean energy grp. (2) | Paolo Pasco |
| Mon Oct 25, 2021 | 11D | Smog-monitoring org. (2) | Damon Gulczynski |
| Tue Oct 5, 2021 | 9D | Emissions control grp. (2) | Hoang-Kim Vu and Jessica Zetzman |
| Mon Jul 19, 2021 | 44A | Clean air and water org. | Stephanie Lesser |
| Sun Jul 18, 2021 | 36A | Fuel economy authority, for short (4) | Jesse Goldberg |
| Fri Jul 9, 2021 | 31A | Org. with an Office of Air and Radiation | Robyn Weintraub |
| Fri May 21, 2021 | 6D | Org. established partly in response to Rachel Carson's "Silent Spring" | Sam Ezersky |
| Wed May 12, 2021 | 55A | Org. that launched WaterSense in 2006 | Tracy Gray |
| Sun Apr 25, 2021 | 114D | Org. with lots of money to waste? | Jeremy Newton |
| Tue Apr 6, 2021 | 10A | Org. since Nixon's presidency | Amanda Chung and Karl Ni |
| Sun Mar 7, 2021 | 54D | Org. that takes the lead on lead? | Celeste Watts and Jeff Chen |
| Sun Feb 28, 2021 | 15D | Cleanup grp. (2) | Brad Wiegmann |
| Sat Feb 20, 2021 | 44A | Org. with resources on smart growth | Ali Gascoigne |
| Wed Feb 17, 2021 | 59D | Antipollution org. (3) | David Harris and Evan Kalish |
| Tue Feb 16, 2021 | 35D | Org. that monitors air quality | Johanna Fenimore |
| Tue Dec 8, 2020 | 35D | Fuel economy org. (4) | Enrique Henestroza Anguiano |
| Sun Nov 8, 2020 | 91A | Org. that awards the Safer Choice label | Evan Kalish and Caitlin Reid |
| Thu Oct 8, 2020 | 58D | Fuel economy authority, for short (4) | Francesca Goldston and Jeff Chen |
| Mon Sep 7, 2020 | 40A | Safe Drinking Water Act enforcer, for short | Gareth Bain |
| Tue Jul 14, 2020 | 27A | Org. concerned with sustainability | Stella Zawistowski |
| Wed Jun 3, 2020 | 1D | Org. with monitors (2) | Johanna Fenimore |
| Sun May 31, 2020 | 33D | Water safety org. | Lewis Rothlein and Jeff Chen |
| Sat May 23, 2020 | 55D | Water monitor, for short | Wyna Liu and Erik Agard |
| Sat Apr 25, 2020 | 45A | Org. that awards the Energy Star label | Andrew J. Ries |
| Tue Apr 14, 2020 | 59A | Emissions watchdog, for short (2) | Joe Hansen |
| Mon Apr 6, 2020 | 62D | Org. that cleans up oil spills | Andrea Carla Michaels and Brian Thomas |
| Sat Apr 4, 2020 | 30D | Org. with the Office of Land and Emergency Management | Yacob Yonas |
| Mon Mar 23, 2020 | 51A | Smog-monitoring org. (2) | Ed Sessa |
| Sat Feb 22, 2020 | 38D | UV index monitor (4) | Trenton Charlson |
| Mon Feb 3, 2020 | 29D | Fuel economy authority, for short (4) | Michael Schlossberg |
| Wed Jan 29, 2020 | 50A | Org. seeking clean skies | Jeremy Newton |
| Thu Nov 14, 2019 | 47A | Fuel economy org. (4) | Alex Eaton-Salners |
| Tue Oct 8, 2019 | 5A | Air-quality org. (3) | Ross Trudeau |
| Sat Aug 31, 2019 | 26A | Cleanup grp. (2) | Brian Thomas |
| Tue Aug 27, 2019 | 61D | Pollution watchdog, for short | Daniel Raymon |
| Wed Jul 17, 2019 | 56D | Green branch, for short | Ada Nicolle |
| Mon Jun 10, 2019 | 40A | Air quality watchdog created by the Nixon admin. | Brad Wilber |
| Mon May 20, 2019 | 18D | Org. concerned with ecosystems | Gary Cee |
| Sun Jan 27, 2019 | 88A | Watchdog org. established by Nixon | Randolph Ross |
| Thu Dec 27, 2018 | 15A | Fed. science org. | Mary Lou Guizzo and Jeff Chen |
| Sun Oct 7, 2018 | 86D | Org. founded under Nixon | Tom McCoy |
| Wed Sep 26, 2018 | 70A | Green-minded org. | Melinda Gates and Joel Fagliano |
| Mon Aug 6, 2018 | 13A | Clean Air Act org. (6) | Andrea Carla Michaels and Mark Diehl |
| Sun May 13, 2018 | 35D | Org. with a flower logo | Neville Fogarty and Erik Agard |
| Sun Apr 29, 2018 | 59D | Green org. (5) | Peter Wentz |
| Fri Apr 27, 2018 | 21D | Ratings org. (2) | David Steinberg |
| Thu Mar 22, 2018 | 52A | Org. established during Nixon's presidency | Ross Trudeau |
| Thu Mar 8, 2018 | 14D | Org. whose mission involves emissions | Jim Quinlan |
| Tue Jan 16, 2018 | 64D | Org. concerned with soil and water | David Steinberg |
| Mon Dec 4, 2017 | 25D | Clean Air Act org. (6) | Alan Arbesfeld |
| Sun Dec 3, 2017 | 135A | Superfund org. (4) | David Steinberg |
| Sun Nov 26, 2017 | 71A | Sample-collecting org. | Jeff Chen |
| Sat Oct 7, 2017 | 11D | Org. concerned with 9-Down | Byron Walden |
| Sat Jul 8, 2017 | 20A | Plant-monitoring org. | David Steinberg |
| Fri May 26, 2017 | 55A | Org. that promotes Energy Star Day | Robyn Weintraub |
| Wed Apr 12, 2017 | 12D | Org. concerned with ecology | Emily Carroll |
| Mon Apr 3, 2017 | 42D | Pollution police, for short | Agnes Davidson and Zhouqin Burnikel |
| Fri Mar 24, 2017 | 4D | Wetlands regulator, for short | Michael Hawkins and John Guzzetta |
| Tue Mar 21, 2017 | 57A | Green govt. group | George Barany and John D. Child |
| Sun Jan 15, 2017 | 37A | Org. concerned with water quality | Joel Fagliano |
| Tue Dec 20, 2016 | 7D | Org. concerned with climate change | Timothy Polin |
| Sun Oct 23, 2016 | 113D | Clean energy grp. (2) | Ellen Leuschner and Jeff Chen |
| Mon Sep 12, 2016 | 41A | Ecologically oriented org. | Victor Fleming and Andrea Carla Michaels |
| Thu Sep 1, 2016 | 29A | Inits. on a car sticker | Ben Tausig |
| Mon Aug 29, 2016 | 63D | Energy Star org. (2) | David Steinberg |
| Tue Aug 16, 2016 | 67D | Superfund org. (4) | Lynn Lempel |
| Sun Jul 17, 2016 | 107A | Cap-and-trade org. | Jerry Miccolis |
| Sun Jul 3, 2016 | 108A | Green org. (5) | Samuel A. Donaldson |
| Fri Jul 1, 2016 | 19A | Org. that covers Springfield in a dome in "The Simpsons Movie" | James Mulhern |
| Wed Jun 29, 2016 | 14A | Fuel economy org. (4) | John Lampkin |
| Thu May 12, 2016 | 32D | Enforcer of the Solid Waste Disposal Act, for short | James Tuttle |
| Sun Apr 10, 2016 | 86D | Org. established by President Nixon | Randolph Ross |
| Tue Apr 5, 2016 | 24A | Radon regulators, in brief | Dan Schoenholz |
| Sun Apr 3, 2016 | 28A | Clean air org. (10) | Natan Last |
| Wed Feb 17, 2016 | 49A | Grp. concerned with global warming | Kyle Mahowald |
| Tue Feb 9, 2016 | 62D | U.S. asbestos regulator | Lynn Lempel |
| Sun Jan 3, 2016 | 96D | Green grp. (3) | David Woolf |
| Sun Nov 1, 2015 | 56D | Dump site monitor, for short | Zhouqin Burnikel |
| Wed Aug 12, 2015 | 33A | Org. whose resources partly go to waste? | Tom McCoy |
| Mon Aug 10, 2015 | 59D | Org. concerned with clean air | C. W. Stewart |
| Mon Jun 15, 2015 | 46A | Smog-fighting govt. group | Mike Buckley |
| Sun Jun 14, 2015 | 55A | Org. that regulates arsenic and asbestos | Randolph Ross |
| Wed May 13, 2015 | 63D | Org. with monitors (2) | Jeffrey Wechsler |
| Tue Apr 28, 2015 | 40A | Org. that might employ a climatologist | José Chardiet |
| Thu Dec 25, 2014 | 14A | Org. concerned with 34-Across | Xan Vongsathorn |
| Wed Dec 3, 2014 | 34D | Org. employing Walter Peck in "Ghostbusters" | Patrick Blindauer |
| Sat Oct 11, 2014 | 16A | Org. with a radon hotline | Evans Clinchy |
| Thu Sep 4, 2014 | 63D | Evil org. in "The Simpsons Movie" | Samuel A. Donaldson |
| Wed Jul 23, 2014 | 62D | Water-quality org. | Howard Barkin |
| Mon Jul 21, 2014 | 40D | Org. tasked with enforcing the Clean Air Act | Matt Fuchs |
| Sun Apr 27, 2014 | 9D | Oil spill-monitoring org. | John Lampkin |
| Fri Mar 21, 2014 | 4D | Sustainable practices grp. | Brendan Emmett Quigley |
| Sun Feb 23, 2014 | 121D | Green monitor, for short? | A Namesake of 119-Across |
| Sun Jan 26, 2014 | 72D | Fuel economy authority, for short (4) | Daniel A. Finan |
| Sat Oct 12, 2013 | 35D | Green org. (5) | John Farmer |
| Sun Aug 18, 2013 | 119D | Superfund org. (4) | Elizabeth C. Gorski |
| Sat Aug 3, 2013 | 17A | Org. with an Office of Water (4) | Brad Wilber and Doug Peterson |
| Tue Jul 30, 2013 | 63D | Org. with air and water standards | Peter A. Collins |
| Wed Feb 27, 2013 | 28A | energystar.gov grp. (2) | Daniel Kantor |
| Tue Feb 26, 2013 | 63D | Org. that monitors oil spills | Gary Cee |
| Sun Feb 10, 2013 | 44A | Org. that fines polluters | Patrick Berry |
| Fri Jan 25, 2013 | 54A | Abbr. in auto ads | Joe DiPietro |
| Sat Nov 3, 2012 | 19A | Antagonistic org. in "The Simpsons Movie" | Milo Beckman |
| Fri Sep 7, 2012 | 52D | Org. whose seal has a flower | Martin Ashwood-Smith |
| Fri Aug 24, 2012 | 6D | It's got its standards: Abbr. | Mark Diehl |
| Mon Jul 30, 2012 | 30D | Eco-friendly org. (2) | Rosemarie Dolan and Christopher Geach |
| Mon Jul 9, 2012 | 23D | Green org. (5) | C.W. Stewart |
| Sun Jul 8, 2012 | 102A | Org. trying to clear the air? | Joel Fagliano |
| Thu Jun 21, 2012 | 6A | Federal org. issuing standards | Caleb Emmons |
| Mon May 28, 2012 | 64A | Clean air org. (10) | Kurt Mueller |
| Sat Apr 28, 2012 | 34A | Org. with lead concerns | Gary J. Whitehead |
| Wed Mar 14, 2012 | 23A | Pollution watchdog org. | Dave Sarpola |
| Wed Feb 29, 2012 | 31D | Green org. (5) | Kevan Choset |
| Sun Dec 18, 2011 | 58D | Cleanup org. (2) | Patrick Merrell |
| Thu Nov 17, 2011 | 60D | Cleanup org. (2) | Patrick Merrell |
| Mon Oct 3, 2011 | 29A | Clean air org. (10) | Stanley Newman |
| Sun Sep 18, 2011 | 17D | UV index monitor, for short | Josh Knapp |
| Thu Aug 18, 2011 | 69D | Green grp. (3) | Kevan Choset |
| Tue Jul 26, 2011 | 47A | Emissions watchdog, for short (2) | Michael Black |
| Sun May 29, 2011 | 42D | UV index monitor (4) | Jeremy Newton and Tony Orbach |
| Sun Mar 27, 2011 | 114A | M.P.G. watcher | Kevin G. Der |
| Thu Oct 14, 2010 | 2D | Abbr. in many car ads | Jim Hilger |
| Wed Sep 22, 2010 | 15A | Org. doing atmospheric tests | Peter A. Collins |
| Sun Sep 19, 2010 | 44D | Spill-fighting grp. | Kevin G. Der |
| Wed Aug 11, 2010 | 3D | DDT-banning org. | Edward Sessa |
| Mon Nov 9, 2009 | 39D | Clean Air Act org. (6) | Lynn Lempel |
| Sun Oct 4, 2009 | 116D | "Go Green!" newsletter org. | Todd McClary |
| Wed May 20, 2009 | 39D | Air monitor, for short | Ashish Vengsarkar |
| Sun Feb 8, 2009 | 62A | Org. with an Office of Water (4) | Alan Arbesfeld |
| Thu Oct 23, 2008 | 57D | DDT banner (3) | Patrick Blindauer |
| Tue Oct 21, 2008 | 57D | Air quality org. (3) | Randall J. Hartman |
| Sat Aug 30, 2008 | 59D | Abbr. in car ads (3) | Michael Shteyman |
| Sun Aug 24, 2008 | 110D | Emissions org. | Kevin G. Der |
| Mon Aug 18, 2008 | 64D | Org. monitoring industrial wastes | Paula Gamache |
| Mon Jul 28, 2008 | 63A | Dump cleanup grp. | Roger Baiocchi |
| Wed Jul 9, 2008 | 8D | Waste watchers: Abbr. (4) | Tim Wescott |
| Wed Jun 25, 2008 | 40A | Abbr. in car ads (3) | Rob Cook |
| Wed Jun 4, 2008 | 37D | Org. monitoring 38-Down quality | Billie Truitt |
| Sun Apr 27, 2008 | 91A | Clean air org. (10) | Oliver Hill |
| Thu Mar 13, 2008 | 30A | Org. established by Nixon (3) | Alan Arbesfeld |
| Tue Jan 29, 2008 | 34A | Fuel economy org. (4) | C. W. Stewart and J. K. Hummel |
| Tue Jan 22, 2008 | 27D | Air quality grp. | Adam G. Perl |
| Thu Dec 6, 2007 | 59D | Govt. org. with a flower in its logo (2) | Joe Krozel |
| Mon Nov 19, 2007 | 32D | Fed. air quality monitor | Lynn Lempel |
| Mon Oct 29, 2007 | 57D | Mileage rating org. (2) | Fred Piscop |
| Wed Oct 24, 2007 | 63D | Air quality org. (3) | Patrick Blindauer |
| Wed Sep 26, 2007 | 38D | Clean Air Act org. (6) | Lee Glickstein and Craig Kasper |
| Fri Sep 7, 2007 | 44A | UV index monitor (4) | Barry C. Silk |
| Thu Jun 14, 2007 | 8D | DDT banner (3) | Donna Hoke Kahwaty |
| Sun Jun 10, 2007 | 70D | energystar.gov grp. (2) | Bob Klahn |
| Thu Jun 7, 2007 | 58D | Waste watchers' org. | Nancy Salomon |
| Sun Apr 22, 2007 | 47A | Smog-watching grp. | Victor Fleming |
| Fri Mar 30, 2007 | 46A | Org. established by Nixon (3) | David Quarfoot |
| Mon Mar 5, 2007 | 36A | Eco-friendly org. (2) | Fred Piscop |
| Wed Feb 28, 2007 | 58D | Air-testing org. (2) | Elizabeth C. Gorski |
| Wed Oct 25, 2006 | 51A | Smog control grp. | Adam G. Perl |
| Fri Sep 1, 2006 | 61D | Grp. concerned with m.p.g. | David Quarfoot |
| Tue Jul 4, 2006 | 57A | Air-testing org. (2) | Ed Early |
| Tue Jun 27, 2006 | 27D | Clean air org. (10) | Damon J. Gulczynski |
| Fri Jan 20, 2006 | 6D | Energy Star org. (2) | Harvey Estes |
| Sun Dec 18, 2005 | 114A | Govt. org. with a flower in its logo (2) | Ethan Cooper and Michael Shteyman |
| Fri Nov 25, 2005 | 37A | DDT banner (3) | Joe DiPietro |
| Thu Oct 27, 2005 | 58D | Test-conducting org. | Bonnie L. Gentry |
| Mon Oct 24, 2005 | 37A | Antipollution org. (3) | Lynn Lempel |
| Sun Aug 21, 2005 | 4D | Grp. setting standards | Byron Walden |
| Sun Jun 5, 2005 | 90A | Superfund administrator: Abbr. (2) | Patrick Merrell |
| Mon Feb 28, 2005 | 22D | Clean air org. (10) | Marjorie Berg |
| Tue Feb 8, 2005 | 22D | Mileage rating grp. | Stephen Budiansky |
| Fri Feb 4, 2005 | 46A | Water tester: Abbr. | Robert Bridges |
| Tue Jan 11, 2005 | 16A | Emissions watchdog: Abbr. (3) | Sarah Keller |
| Thu Dec 16, 2004 | 2D | Org. that conducts many studies | Mike Torch |
| Wed Dec 15, 2004 | 18D | Ecol. watchdog (4) | Zach Jesse |
| Wed Oct 20, 2004 | 23A | Fed. watchdog | Elizabeth C. Gorski |
| Mon Oct 11, 2004 | 34A | Factory-emissions testing grp. | Jim Hyres |
| Sun Oct 3, 2004 | 99A | Org. that does studies | Randolph Ross |
| Tue Sep 14, 2004 | 69A | Clean air grp. (3) | Nancy Salomon and Harvey Estes |
| Sun Sep 12, 2004 | 19A | Green grp. (3) | Patrick Berry |
| Sun Aug 22, 2004 | 50D | Org. concerned with PCB's (2) | Cathy Millhauser |
| Wed Aug 18, 2004 | 36D | Org. concerned with PCB's (2) | Nancy Salomon and Levi Denham |
| Sun Mar 28, 2004 | 49A | Grp. involved in a cleanup | David J. Kahn |
| Mon Mar 1, 2004 | 5D | Ecol. watchdog (4) | Gail Grabowski |
| Wed Feb 25, 2004 | 55D | Rater of m.p.g. | Nancy S. Ross |
| Tue Feb 10, 2004 | 25A | Clean-air org. (10) | Seth A. Abel |
| Sun Dec 28, 2003 | 26A | Superfund org. (4) | Seth A. Abel |
| Tue Nov 25, 2003 | 66D | Air quality tester, for short | Allan E. Parrish |
| Mon Oct 27, 2003 | 26A | Pollution control org. | Richard Miller |
| Fri Oct 24, 2003 | 11D | Trash trackers: Abbr. | Sherry O. Blackard |
| Tue Sep 30, 2003 | 14A | Pollution watchdog: Abbr. | Kevan Choset |
| Fri Jul 11, 2003 | 4D | Org. launched by Nixon | Patrick Berry |
| Sat Jun 28, 2003 | 18A | Superfund administrator: Abbr. (2) | Robert H. Wolfe |
| Mon May 19, 2003 | 65A | Pesticide-monitoring grp. | Trip Payne |
| Sun Apr 20, 2003 | 70D | Org. with a superfund | Bill Zais |
| Mon Apr 14, 2003 | 16A | Air-quality monitoring org. | Janet R. Bender |
| Tue Dec 31, 2002 | 8D | It rates m.p.g. | Gene Newman |
| Wed Nov 27, 2002 | 67A | Cabinet-level dept. | Ron O'Hair |
| Thu Nov 14, 2002 | 62D | UV index tracker | Paula Gamache |
| Mon Sep 30, 2002 | 22D | Fed. pollution monitor | Harvey Estes and Nancy Salomon |
| Wed Sep 4, 2002 | 12D | Clean Air Act enforcer: Abbr. | Eric Berlin |
| Wed Jul 10, 2002 | 42D | Org. that may be involved in a cleanup | Richard Silvestri |
| Wed Jun 19, 2002 | 65D | Raters of m.p.g. | Janet R. Bender |
| Sun Jun 16, 2002 | 45D | Smog-fighting grp. | Manny Nosowsky |
| Sun Jun 9, 2002 | 104D | Assessors of m.p.g. | Randolph Ross |
| Mon May 6, 2002 | 21A | Clean air org. (10) | Peter Gordon |
| Thu Apr 4, 2002 | 70A | Emissions-regulating org. | Trip Payne |
| Sun Feb 24, 2002 | 78A | Waste watchers: Abbr. (4) | Manny Nosowsky |
| Wed Jan 23, 2002 | 52A | Pollution control grp. (2) | Alan Arbesfeld |
| Sun Nov 18, 2001 | 6D | Air monitor: Abbr. | Jim Page |
| Thu May 24, 2001 | 58D | Grp. monitoring emissions | William I. Johnston |
| Fri Apr 20, 2001 | 24D | Eco-friendly feds | Chuck Deodene |
| Wed Apr 18, 2001 | 66D | Clean air grp. (3) | A. J. Santora |
| Thu Mar 8, 2001 | 20A | Org. that banned DDT | Peter Gordon |
| Thu Dec 21, 2000 | 38D | Smog-regulating grp. | Manny Nosowsky |
| Sun Nov 26, 2000 | 106A | Org. with an Office of Water (4) | Patrick Berry |
| Sat Aug 19, 2000 | 52A | UV index monitor (4) | Charles E. Gersch |
| Thu Jun 29, 2000 | 57A | Air tester: Abbr. | Robert H. Wolfe |
| Sat May 6, 2000 | 18A | Govt. agency since 1970 | Rich Norris |
| Wed Feb 23, 2000 | 23A | Mileage rating org. (2) | Fred Piscop |
| Sun Feb 13, 2000 | 116D | Standards issuer, briefly | Bill Zais |
| Wed Feb 9, 2000 | 65A | Antipollution org. (3) | Charles E. Gersch |
| Sun Nov 21, 1999 | 5D | Grp. with standards | Patrick D. Berry |
| Sat Aug 21, 1999 | 57D | Kind of rating (2) | Charles E. Gersch |
| Sun Jul 18, 1999 | 116D | M.P.G. determiners | Nancy Nicholson Joline |
| Fri May 28, 1999 | 37D | Org. concerned with emissions (2) | Joe DiPietro |
| Sat Apr 24, 1999 | 38D | Waste watchers: Abbr. (4) | Joe DiPietro |
| Sun Apr 18, 1999 | 160D | Waste watchers: Abbr. (4) | Frank Longo |
| Wed Apr 7, 1999 | 24A | Emissions control grp. (2) | Rich Norris |
| Sat Feb 6, 1999 | 61D | Kind of rating (2) | Bob Klahn and Martin Ashwood-Smith |
| Tue Jan 12, 1999 | 24A | Mileage testing grp. | Nancy Salomon |
| Mon Aug 10, 1998 | 52A | Ecol. watchdog (4) | Brendan Emmett Quigley |
| Wed Jul 29, 1998 | 52A | Govt. watchdog (2) | Elizabeth C. Gorski |
| Tue Jun 16, 1998 | 60D | Pollution stds. setter | Bill Ballard |
| Tue May 19, 1998 | 48D | Smog-battling org. | William S. Cotter |
| Sat Apr 25, 1998 | 22D | Grp. that rates | Jim Page |
| Tue Mar 17, 1998 | 48A | Ecol. watchdog (4) | Nancy Salomon and Bob Klahn |
| Wed Nov 19, 1997 | 29D | Govt. watchdog (2) | Elizabeth C. Gorski |
| Tue Sep 16, 1997 | 39D | Emissions tester: Abbr. | Christopher Page |
| Wed Jul 2, 1997 | 57D | Govt. watchdog group | Richard Hughes |
| Thu Jun 12, 1997 | 25A | Air quality tester: Abbr. | Gilbert H. Ludwig |
| Sun Mar 9, 1997 | 136D | Org. founded in 1970 | June Boggs |
| Tue Feb 4, 1997 | 25A | Grp. overseeing toxic cleanups | G. R. Ferguson |
| Sun Sep 8, 1996 | 32D | Auto indus. regulator | R. H. Wolfe |
| Mon Aug 26, 1996 | 55A | Clean air grp. (3) | G. E. Paul |
| Thu Jul 18, 1996 | 16A | Car m.p.g. raters (2) | W. R. Williams |
| Sun Jul 7, 1996 | 91A | Ecol. police | R. H. Wolfe |
| Sun Jun 30, 1996 | 63A | Auto industry regulator: Abbr. | R. Norris |
| Fri Jun 7, 1996 | 61D | Emissions watchdog: Abbr. (3) | M. Jones |
| Mon Apr 22, 1996 | 50A | Car m.p.g. raters (2) | S. B. Whitten |
| Wed Apr 17, 1996 | 2D | Govt. watchdog grp. | F. Heaney |
| Thu Mar 21, 1996 | 42A | Polluter-busting org. | H. Estes |
| Sun Feb 25, 1996 | 52A | Testing org. | D. Niles |
| Wed Feb 7, 1996 | 50A | Pollution control grp. (2) | Frank A. Longo |
| Tue Jan 16, 1996 | 39A | Fed. air quality org. | R. Hartman |
| Sun Sep 10, 1995 | 73D | Car-emissions agcy. | David J. Kahn |
| Fri Jun 30, 1995 | 56D | Emissions watchdog: Abbr. (3) | Rich Norris |
| Sun May 7, 1995 | 108D | Fuel efficiency rater: Abbr. (2) | Bob Klahn |
| Sat Feb 18, 1995 | 22A | Ratings org. (2) | Stephanie Spadaccini |
| Wed Feb 15, 1995 | 50D | Ecol. org. | Harvey Estes |
| Wed Nov 9, 1994 | 30D | Auto-testing grp. | Wayne Robert Williams |
| Thu Sep 15, 1994 | 52A | Antipollution grp. (2) | Fred Piscop |
| Wed May 25, 1994 | 44A | Antipollution grp (2) | Fred Piscop |
| Sat Apr 23, 1994 | 44A | Agcy. that monitors smoking hazards | Manny Nosowsky |
| Thu Mar 31, 1994 | 38D | Clean air org. (10) | Mark Diehl |
| Mon Mar 28, 1994 | 56D | Fuel efficiency rater: Abbr. (2) | William P. Baxley |
| Fri Mar 11, 1994 | 22D | Clean air agcy. | A.J. Santora |
| Tue Mar 1, 1994 | 17D | Wetlands watchdog | D.J. Listort |
| Thu Jan 13, 1994 | 41A | Abbr. in car ads (3) | Harvey Estes |
| Thu Dec 30, 1993 | 3D | Clean water agcy. | A.J. Santora |