O3 ambient concentrations in Jakarta have increased from
2001–2003 (Figure 3.6). Th ese concentrations exceeded the 30
μg/m3
Jakarta limit for annual averages with concentrations in
2003 exceeding the limit more than twofold. Measurements of
O3
in Surabaya for 2001–2003 show the annual levels are also
within the standards for 1-year national standard (50μg/m3
).
Th e 2001 ozone level is 36 μg/m3
and the 2002 level is 40 μg/m3
.
Th e observed annual mean for 2003 of about 15 μg/m3
seems
very low compared to the 2001 and 2002 levels. Th is merits
further clarifi cation of the data.