Transportation / Mobility

October 28, 2005


Diesel Vehicle Emission Controls in Tokyo Improving Air Quality

Keywords: Local government Transportation / Mobility 

The air quality improved remarkably and steadily thanks to compliance with environment standards for suspended particulate matter (SPM) and nitrogen dioxide (NO2) in fiscal 2004, according to an announcement on June 24, 2005 by the Tokyo Metropolitan Government.

The SPM level met the standard at 33 out of 34 Roadside Air Pollution Monitoring Stations (RAPMS), as well as all of 47 Ambient Air Pollution Monitoring Stations (AAPMS) in residential areas. The achievement rates in fiscal 2002 and 2003 were 0 and 12 percent for RAPMS, and 40 and 51 percent for AAPMS, respectively. Even at one station where the level didn't meet the standard this time, a remarkable improvement was seen.

The NO2 level met the standard at 16 RAPMSs (47 percent) and all of the AAPMSs. The achievement rates in fiscal 2002 and 2003 were 37 and 53 percent for RAPMS, 93 and 98 percent for AAPMS, respectively.

Since the No Diesel Vehicle Campaign began in Tokyo in August 1999, the Tokyo Government has been taking many pioneering initiatives in various fields to prevent air pollution in Tokyo, calling for cooperation of the national government and related industry groups. Tokyo attributes the above results to its diesel vehicle emission control regulations enforced in October 2003.

Posted: 2005/10/28 01:58:21 PM
Japanese version