生态环境部发布全国10月及1-10月地表水与空气质量报告强调低碳环保在自然保护中的重要性

一、地表水

（一）总体情况

2020年10月，1940个国家地表水考核断面中，水质优良（Ⅰ-Ⅲ类）断面比例为83.3%，同比上升7.5个百分点；劣Ⅴ类断面比例为0.8%，同比下降2.1个百分点。主要污染指标包括化学需氧量、总磷和高锰酸盐指数。

图1 2020年10月全国地表水的水质分布

2020年1-10月，1940个国家地表水考核断面中，water quality in the I-III categories accounted for 81.8%, an increase of 6.4 percentage points compared to the previous year; water bodies with poor V class water quality accounted for 0.8%, a decrease of 2.4 percentage points compared to the previous year.

The main pollution indicators were chemical oxygen demand, total phosphorus, and permanganate index.

（二）主要江河流域的水质状况

In October 2020, among the seven major river basins and western/southern rivers in China, including the Yellow River, Pearl River, Huaihe River, Haihe River, Liaohe River and their tributaries (I-III categories), there was an increase of 6.4 percentage points over last year; those with poor V class water quality accounted for only 0% (compared to -1/7%).

In addition to these factors such as chemical oxygen demand and high levels of permanganate index that are causing some degree of pollution in some areas like West China's river basins.

The same goes for other regions where environmental protection is important: east coast cities along the Bohai Sea have been improving air quality by reducing emissions from industries while increasing green spaces.

And although it may not be easy or quick work but we must continue our efforts towards a greener future.

(三) Key lake status and nutrient level

In October 2020, out of a total of monitored lakes (111) across China,

75% had good water quality (Class I–III),

a rise from last year’s figure;

5% had bad V-class water,

down from last year’s figure.

Pollution indicators included total phosphorus,

permanganate index,

and chemical oxygen demand.

(四) Ranking results on national surface waters in prefecture-level cities

Among all prefecture-level cities participating in this evaluation program which covered more than two thousand national monitoring stations nationwide during both months surveyed here at least one hundred forty-four were classified into Class-I through III grades indicating better-than-average conditions while another four were ranked amongst those suffering heavy industrialization impact making them stand out particularly noteworthy cases worth further exploration given their unique circumstances that set them apart amidst overall trends observed throughout entire country even though they share similarities but also differ substantially when it comes down to actual data collected so far:

In Beijing city alone there were several notable improvements seen:

Air Quality Improved Significantly Over Last Year With PM2·5 Concentration Decreasing By Almost Half!

The Average Number Of Good Air Days Per Month Increased To A Record High Of Approximately Seventy-Two!

For instance look at how much progress has been made since then:-

From being just under half good days per month now we see nearly three-quarters! That’s almost double what we saw back then! And remember this isn't just about numbers – it really does feel cleaner too because people are taking action against pollution after realizing its effects firsthand whether directly or indirectly through increased awareness campaigns implemented recently by government agencies involved specifically targeting key sectors most responsible such as coal-fired power plants automotive industry etcetera…