In October 2010, Hefei City launched a special campaign to improve drainage facilities throughout the city. As of now, the three rounds of special operations have basically ended. The city's 4003 drainage facilities have been rectified, and the rain and sewage diversion work has achieved remarkable results. The collection and treatment rate has been greatly improved, which has greatly promoted the improvement of the water environment in Hefei City.

It is reported that since the launch of the “governance” initiative, the Hefei City’s directly-affiliated units, counties, and development zones have focused on the city’s real estate development projects, main and secondary arterial roads, street front facades, vegetable market rainwater and sewage pipe network misconnections, mixed connections, and river channel rains. The problems such as pollution, pressure and other issues were investigated thoroughly and relevant plans were formulated, and transformation was strictly carried out in accordance with the requirements of the code.

The water quality of rivers and lakes has improved in special operations. Through comprehensive river rehabilitation, sewage interceptors have been constructed, and river drains have been fully investigated, and long-term management mechanisms have been established based on the principle of territorial management; and the supervision and management of standardized operation of sewage plants have been intensified. Ensure that the discharge of water is up to the standard; the project, technology, and management measures are implemented at the same time. Through the rectification work, various pollution indicators of rivers and lakes have shown a downward trend, and the water quality has gradually improved. At the end of 2011, the ammonia, nitrogen, total phosphorus, total nitrogen, and permanganate indexes of Xihu Lake and Nanzhao River in Chaohu Lake have both declined compared to previous years.

Significant increase in emission reduction capacity Through the development of special actions for drainage facilities, the past phenomenon of incomplete discharge of rain and sewage has been greatly improved, and the influent water volume and concentration of influent pollutants in wastewater plants have been increasing year by year, which is a stable and efficient operation of the wastewater treatment plant. Provided protection, the total amount of pollutants emission reduction achieved remarkable results. In 2011, COD emission reductions amounted to 4,080 tons, and ammonia nitrogen emission reductions amounted to 1,002 tons. Over the years, the reduction targets for sewage treatment plants were exceeded.

Drainage behavior has been standardized and improved. The development of drainage facilities and various forms of propaganda and mobilization work have also increased the awareness of the whole society in protecting the water environment. Standardized drainage practices have been accepted by the society, the unit and the general public. The newly constructed project strictly implements the diversion of rainwater and sewage, and the amount of rain and dirt that has not been separated from old buildings and completed projects has been greatly reduced. In 2011, a total of 400 drainage design conditions and drainage permits were approved, an increase of 20% over the same period of last year. These data indicate that the city's drainage behavior has been excellently regulated.

The major problems that need to be solved in order to gradually reduce the improvement of drainage facilities are the problem of sewage collection and treatment. At the same time, it also tackles problems such as blocked drainage pipes and pressure on drainage outlets. In 2011, through a variety of well-developed drainage facilities, overflow and flood seasons such as Zhangye Road underpass, Quanjiao Road Interchange, and the Old City were significantly reduced, and internal spills began to improve.

In 2012, we started grid rectification to solve the drainage problem at the source. Today, the main roads, key areas, the three major development zones, the Binhu New District, and the administrative districts in Hefei City have basically achieved rain and sewage diversion, but the branch roads, small streets, and alleys are old. The phenomenon of mixed rainwater and sewage, misconnections, and indiscriminate connections in old communities has not yet been fundamentally resolved. The city will continue to intensify efforts to promote rain and sewage diversion, and strive to achieve the goal of fully collecting sewage in a fully-acquired manner in another three years or so. .

In 2012, the city will launch a grid survey in an all-round way, check the drainage problem from the source, accelerate the grid rectification, strictly control the design, project quality, completion acceptance, and implement the rain and sewage diversion from the source. At present, the city has divided 2770 grids according to the smallest road in each area (chaohu, jiang jiang and chaohu of Hefei are being divided). Through the grid census, you can fully grasp the drainage information of the drainage households in the grid. Find out that there is a problem and set up a database. At present, the three major development zones, lakesides, and government affairs districts have completed census. The county and district districts are in the process of conducting bids for census units. Chaohu City, Qijiang County, and Hefei Chaohu Economic Development Zone will also be divided into grids as soon as possible according to the unified requirements of the city. Conduct a census. Before the end of June 2012, the counties (cities) are planning to complete the grid survey; by the end of the year, the development zones, the administrative districts and the Binhu New Area will complete the rectification work, and all counties (cities) and districts will complete 40% of the rectification work. task.