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Houston's Progress Towards Meeting the 2007 1-Hour Standard and 2010 8-Hour Standard

This article discusses Houston's progress towards meeting the 1-hour and 8-hour ozone standards. It highlights the challenges and reasons for slow progress, including gaps in science, underreporting of emissions, and inadequate enforcement. The article suggests that 2009-2012 may be a more realistic timeframe for 1-hour attainment and emphasizes the need for more aggressive measures for both 1-hour and 8-hour attainment by 2010-2014.

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Houston's Progress Towards Meeting the 2007 1-Hour Standard and 2010 8-Hour Standard

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  1. How Meeting the 2007 1-Hour Standard & Reductions of Variable Emissions Will Help Houston Meet the 2010 8-Hour Standard? Neil Carman, Ph.D. Sierra Club Lone Star Chapter

  2. Will the Houston area make progress toward attaining the 8-hour ozone standard by meeting the 1-hour NAAQS in 2007? Need to realize that the Houston area has a long ways to go to reach attainment with the 1-hour NAAQS and 2007 is too optimistic looking forward from late in 2004.

  3. Will the Houston area make progress toward attaining the 8-hour ozone standard by meeting the 1-hour NAAQS in 2007? Yes, Houston is making slow progress toward 1-hour and 8-hour attainment, but it’s unlikely that Houston will reach 1-hour attainment by 2007 - - 2009-2012 may be a more realistic time frame for 1-hour attainment.

  4. Several prime reasons for Houston’s slow progress toward attainment: • Gaps in science of Houston’s ozone formation and measuring it’s sources. • Exceedance days under-monitored for years & this under-projected how severe the HGA ozone has been for years

  5. Several prime reasons for Houston’s slow progress toward attainment: • Emissions Inventories under-reported VOCs & HR-VOCs by several orders of magnitude for years • Enforcement and inspections inadequate

  6. Several prime reasons for Houston’s slow progress toward attainment: • Enforcement and inspections inadequate • Modeling did not account for all VOC emissions, etc.

  7. Some prime reasons for Houston’s slow progress toward attainment: • VOC reductions & control measures inadequate, etc. • SIPs have been significantly deficient.

  8. 1-Hour Progress: 1999-2004 Exceedance Days Houston averaged 37 exceedance days/yr under 1-hour standard 1999 -Oct 4, 2004. 1999-2000 One-hour days (52 + 41): 93 2001-2002 One-hour days (32 + 26): 58 2003-2004 One-hour days (34 + 37): 71* 1999-2004: 222 days @ 37 days a year *expanded monitoring network & more 1-hour days

  9. 1-Hour Progress: 1993-2004 Exceedance Days Houston averaged 40 exceedance days/year under 1-hour standard from 1993-Oct 4, 2004. 1993-1994 One-hour days (39 + 39): 78 1995-1996 One-hour days (61 + 28): 89 1997-1998 One-hour days (49 + 40): 89 1999-2000 One-hour days (52 + 41): 93 2001-2002 One-hour days (32 + 26): 58 2003-2004 One-hour days (34 + 37): 71

  10. 1-Hour Progress: 1991-2004 Exceedance Days Houston averaged 40 exceedance days a year under 1-hour standard from 1991 -Oct 4, 2004. 1991-1992 One-hour days (46 + 41): 87 days 1993-1994 One-hour days (39 + 39): 78 1995-1996 One-hour days (61 + 28): 89 1997-1998 One-hour days (49 + 40): 89 1999-2000 One-hour days (52 + 41): 93 2001-2002 One-hour days (32 + 26): 58 2003-2004 One-hour days (34 + 37): 71

  11. 1-Hour Progress: 2004 Exceedance Days Houston has surpassed the L.A. area in 1-hour days three of the last years since 1999 including 2004. Houston area - 37 days Los Angeles basin - 27 days San Joaquin Valley - 9 days Washington, DC area - 5 days Dallas-Ft Worth area - 4 days

  12. Eight-Hour Progress: 2004 Exceedance Days Houston moving closer to LA in 8-hour days. San Joaquin Valley - 90 days Los Angeles basin - 85 days Houston area - 51 days Dallas-Ft Worth area - 25 days Sacramento area - 21 days Ventura area - 15 days NYC, Atlanta, BPA, area - 11 days

  13. Will Houston make progress toward attaining the 8-hour ozone standard by meeting the 1-hour NAAQS? For now, Houston has made slow progress toward 1-hour & 8-hour attainment, and it’s going to be difficult for Houston to reach attainment by 2007 with the 1-hour NAAQS - 2009-2012 may be more realistic scenario. Delayed 1-hour attainment means 8-hour attainment is unlikely by 2010. 2012-14?

  14. Houston has to develop more aggressive SIP measures through reductions and controls to achieve 1-hour & 8-hour attainment by the 2010-2014 period.

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