The results of the year are summarized as follows: (一) Environmental loads and trends The total city population from 1988 to 2012, the average growth rate is 2.3%. Over the years, the population increased slowly since 1999. In these three years, the population growth has shown negative growth. Till 2013, the amount of population reaches 271,220 people. The population density is 4518.41 people per square kilometer, which ranked No. 2 in the whole country, second only to Taipei City (9,538.28 people / sq km). In 2012, the registered vehicle accounts for a total of 291,562 vehicles. In the past 10 years, as for the growth of the number of all types of vehicles, the growth rate is 14%. That has been slowing down then past 10 year (1999~2008) growth rate 24%. The overall density of vehicles is 4,857.39 vehicles / km, which ranks second in Taiwan, only to Taipei (6,830.53 vehicles / km). Till 2012, there are in total 437 registered industries. Compared with that in 2011, it was the same. Over the years (2003 to 2012), it showed negative growth, and the rate of variation is -9%. As for construction projects since 2008, the number has gradually decreased. In recent years, the number of engineering has increased. The highest is in 2010 and 2011 respectively, with the number of 1,150 pieces. Pollution management with the control measures, the reduction rate has reached 51.7 %. Till 2012, the number of engineering is 930. Compared with that last year, it has decreased by 19.13%. Pollution management with the control measures, the reduction rate has reached 57.09 %, higher than 51.7% last year. Petition cases of environmental pollution has gradually increased year by year in the city, and non-odor pollutants (such as open burning, dust (construction engineering), industrial, vehicle idling and exhaust) are the main ones. It results from the rise of the public environmental awareness and concern at home environmental quality. (二) Current air quality conditions Yun Chia Air Quality Region, As for the PSI>100 rate is 0.85%, that air quality adverse event day is 28 station day. Since 1994, the best year for air quality. As for Chiayi city in this year (November), that air quality adverse event day is 5 station day (Particulate、Ozone). Rate is 1.52%, which less than 2.53%. (三) Adverse air quality notification operations Statistically, the number of the adverse air pollution notification is 60 times in total this year (including 15 times of found and 40 times of forecasting and 5 times of Jhuoshuei river dust notification), with the suspended particles in majority. Total air pollution notification additon than last year (2011 year is 55 times). After each adverse notification, their PSI values have increased, which is 21 times in total. The ones with improved effectiveness are 28 times (PSI values <100).The fair is 1 times. The air pollution days is 4 times. (四) Air purification zones There were had 8 air purification zones in chiayi city. that include 6 green space , 2 bicycle paths, total greenlands was 11.45 Ha. Air purification zones will complete its assessment of the condition in management and maintenance on May 7th and December 9th this year. The achievement rate is 100%. After the field assessment, there is a total of three bases with the best maintenance. (五) indoor Air management Stage, completed a total of 50 public places carbon dioxide detector, the completion rate of 100%. Statistics 50 places the test results, the average concentration of carbon dioxide in order to detect the highest hospitals, kindergartens followed. The concentrations is 713ppm in hospitals, and 682ppm in kindergartens. Then the top concentrations values is 1,136ppm in hospitals and 1,494ppm in kindergartens. That should to manage indoor air quality, and pay attention.

Air Quality;Air purification zones;indoor Air management