| 全海域未达到第一类海水水质标准的海域面积(平方公里) | |||||
| Sea Area with Water Quality Not Reaching Standard of GradeⅠ(sq.km) | |||||
| 年 份 | 合 计 | 第二类水质 | 第三类水质 | 第四类水质 | 劣于第四类水质 |
| 海域面积 | 海域面积 | 海域面积 | 海域面积 | ||
| Year | Total | Sea Area with | Sea Area with | Sea Area with | Sea Area with |
| Water Quality | Water Quality | Water Quality | Water Quality | ||
| at Grade Ⅱ | at Grade Ⅲ | at Grade Ⅳ | below Grade Ⅳ | ||
| 2001 | 173390 | 99440 | 25710 | 15650 | 32590 |
| 2002 | 174390 | 111020 | 19870 | 17780 | 25720 |
| 2003 | 142080 | 80480 | 22010 | 14910 | 24680 |
| 2004 | 169000 | 65630 | 40500 | 30810 | 32060 |
| 2005 | 139280 | 57800 | 34060 | 18150 | 29270 |
| 2006 | 148970 | 51020 | 52140 | 17440 | 28370 |
| 2007 | 145280 | 51290 | 47510 | 16760 | 29720 |
| 2008 | 137000 | 65480 | 28840 | 17420 | 25260 |
| 2009 | 146980 | 70920 | 25500 | 20840 | 29720 |
| 2010 | 177720 | 70430 | 36190 | 23070 | 48030 |
| 2011 | 144290 | 47840 | 34310 | 18340 | 43800 |
| 2012 | 169520 | 46910 | 30030 | 24700 | 67880 |
| 2013 | 143620 | 47160 | 36490 | 15630 | 44340 |
