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Table 6 The 99th percentile 8-hour running average for ozone (8-hourly running average) measured at Embalenhle (Sasol)

From: Respiratory health among adolescents living in the Highveld Air Pollution Priority Area in South Africa

Pollutant

NAAQS limit

2005

2006

2007

2008

2009

O3

61 ppb

–

–

–

–

–

Pollutant

NAAQS limit

2010

2011

2012

2013

2014

O3

61 ppb

–

–

–

–

–

Pollutant

NAAQS limit

2015

2016

2017

2018

2019

O3

61 ppb

–

71

70

68

72