1July, 1994, due to the sudden rainstorm, the upper reaches of the Huaihe River adopted flood discharge, and the 200 million cubic meters of water accumulated in the upper reaches were released in one winter and spring. Where the water passes, the river is turbid, the foam on the river surface is dense, and the fish and shrimp suddenly lose. Residents in some places downstream have symptoms such as nausea, diarrhea and vomiting after drinking the river water treated with tap water but not up to the drinking standard. After sampling inspection, it was confirmed that the water quality of the upstream water deteriorated, and the waterworks along the Yangtze River were forced to stop water for 54 days, and millions of people in Huaihe River were in a hurry to drink water.
Nanpanjiang water pollution incident in 2002
Nanpanjiang River in Yunnan Province is the main source of the Pearl River. From June 5438 to 10, 2002, a serious sudden water pollution incident occurred in the upper reaches of Chaishitan in Nanpanjiang River, which killed hundreds of tons of fish and polluted more than 300 million cubic meters of water in the lower Chaishitan Reservoir. Due to the dense population and concentrated industrial and agricultural production along the Nanpanjiang River, it is one of the economically developed areas in Yunnan Province. Therefore, this water pollution incident not only caused huge economic losses, but also caused bad social impact.
Sanmenxia in 2003: "Sewage Reservoir"
In recent years, the sewage discharge of some enterprises in the upper reaches of Sanmenxia dam has been increasing, and the domestic sewage of towns near the Yellow River has also increased year by year. In addition, due to the degradation of the ecological environment in the Yellow River basin, the ability of the Yellow River to degrade pollutants has declined, which has seriously reduced the water quality of Sanmenxia Reservoir. In 2003, the Yellow River suffered the most serious pollution since the measurement record was recorded. The water discharged from Sanmenxia Reservoir is "soy sauce color", and the water quality has deteriorated to Class V, becoming a veritable "one-reservoir sewage". Although Sanmenxia City is close to the Yellow River, citizens have to spend money to buy mountain spring water from nearby mountains. "Watching the Yellow River to buy water to eat" has become a major "urban landscape" in Ermenxia City.
The "3.02" catastrophic water pollution accident in Tuojiang River in 2004.
At the end of February and the beginning of March, 2004, residents on both sides of the Tuojiang River found that the river turned yellow and smelly, with white foam in many places and a large number of dead fish floating on the river. Then, residents found that the tap water also turned brown and smelled of ammonia. Chuanhua No.2 Chemical Fertilizer Plant is the person responsible for this pollution accident. They discharged a large amount of high-concentration industrial wastewater into Tuojiang River, resulting in the interruption of drinking water for millions of people in Jianyang, Zizhong and Neijiang along the Yangtze River, and the death of 500,000 kilograms of cage fish culture, resulting in a direct economic loss of about 300 million yuan. It took five years to restore the destroyed ecology.
Water pollution incident in Chuxiong section of Longchuan River in 2004
Longchuanjiang River is the main economic belt in Chuxiong City, Yunnan Province, with industrial and mining enterprises such as smelting, chemical industry, paper making, pharmacy, tobacco and salt mines. At the beginning of June 2004, a serious cadmium pollution incident occurred in Longchuan River, Chuxiong City.
The total cadmium in Chuxiong Hydrological Station, Zhiminqiao and Heijing sections exceeded the standard by 36.4 times. After the sewage outlet along the river
After investigation, it is the sewage from sulfuric acid plant, Haiyuan Xinye Company and Diandong Smelter that causes cadmium pollution.
The main source of pollution.
In 2004, floods flowed from several villages prone to cancer.
The Red River is located in Ludian Township, Xiping County, Henan Province, and is about 1 1 km long, also known as Little Red River. Most of the surrounding villagers have lived here for generations, but the incidence of cancer is very high in recent years. According to the investigation, due to the illegal discharge of sewage by coastal enterprises, the river water is seriously polluted, and the nitrite nitrogen exceeds the standard by more than 54.5 times. It is the surrounding villagers who drink such water for a long time that will induce digestive tract cancer.
In 2004, Puyang, Henan Province could not drink "safe water" for many years.
From June 5438+ 10, 2004, a water pollution incident occurred at the water intake of the Yellow River in Puyang City, Henan Province, which lasted more than four months. The drinking water safety of more than 400 thousand residents in the urban area is threatened, and Puyang city is forced to use the standby underground water source. It is understood that since 1997, the water intake of the Yellow River in Puyang City has been polluted for many years, and the urban drinking water source is affected by pollution for about 4-5 months every year.
Water Pollution Event of Qingyi River in Sichuan in 2004
Qingyi River is the drinking water source of nearly 400,000 citizens in Leshan City, Sichuan Province. In recent years, Qingyi River has been polluted because some paper-making enterprises have not secretly discharged a large amount of industrial sewage. From the end of June, 5438 to February, 2004, a large number of white bubbles appeared on the surface of Qingyi River, emitting a burst of alkaline odor. The water quality is in a serious emergency, and the surrounding water supply companies are on the verge of stopping production because of the increased difficulty in producing qualified drinking water. If the pollution continues to increase, Leshan city will face the situation that 250,000 people will be cut off from water.
Pollution Status of Qihe River in Chongqing in 2005
Because the water intake point was polluted, the waterworks stopped supplying water. Nearly 30,000 residents in He Qiao District, Gu 'nan Street, Qijiang, Chongqing, had no running water for two consecutive days from 65438+2005 10/3, and Qijiang Gear Factory stopped production. After investigation by the health and environmental protection departments, the river was polluted by the wastewater discharged by Chongqing Huaqiang Chemical Fertilizer Co., Ltd., and the relevant departments of Qijiang County immediately opened floodgates in the upper and lower reaches of He Qiao to speed up the dilution of polluted water, and instructed the sulfuric acid plant of Huaqiang Chemical Fertilizer Co., Ltd. to stop production and rectify.
Phosphorus Pollution in Tuojiang River in 2005
In February 2005, a reporter found that the water in Yinshan section of Tuojiang River was polluted by sewage discharged by enterprises. There is a stream flowing to Tuojiang River in Gujing Village, yinshan town. The surrounding air is filled with the thick smell of distiller's grains. The exits of several phosphate fertilizer plants are discharging dark red wastewater from streams. The riverbed and coastal soil of the stream are dark purple, which is obviously formed by long-term erosion and deposition, and even the Tuojiang River has been dyed red. Where sewage flows, crops and bamboo forests die one after another.
Jiaxing, a water town in 2005: serious pollution and water shortage.
In mid-March 2005, various water-saving publicity materials appeared on the streets of Jiaxing, instructing residents to wash vegetables with rice washing water, wipe the floor with laundry water, or put bricks in the toilet tank to save water for flushing toilets. The water price of Jiaxing residents also rose from 1.65 yuan to 1.9 yuan. On the surface, Jiaxing is a city with dense river networks, and there is no shortage of water, but in fact, the available standard water is very scarce. Upstream transit water pollution is one of the main factors causing water shortage in Jiaxing.
In 2005, the Yellow River water became "the harm of agriculture"
Along the Yellow River, there are many highly polluting industrial enterprises such as energy, heavy chemicals, non-ferrous metals and paper making, and the wastewater discharge is increasing year by year. A large number of substandard industrial wastewater is directly discharged into the aqueduct, which leads to similar sewage irrigation in the irrigation area along the Yellow River, and crops in some areas are also reduced or even completely harvested. For a time, the phenomenon of "smelly water entering the village, poisonous water filling the land and dirty water entering the stomach" appeared in the rural areas of the Yellow River Basin, and the Yellow River water became "the harm of agriculture".
Major water pollution incident in Songhua River in 2005
On June/2005165438+1October 13, an explosion occurred in the aniline workshop of Shuangbenzene Plant of China Petroleum Jilin Petrochemical Company. About 100 tons of organic pollutants such as benzene, aniline and nitrobenzene produced by the accident flowed into Songhua River. Benzene pollutants are harmful to human health, leading to major water pollution incidents in Songhua River. The Harbin Municipal Government immediately decided to close the water intake of the Songhua River in Harbin 165438 from 0: 00 on October 23rd, and stop supplying water to the urban area. All supermarkets in Harbin snapped up drinking water without exception.
Cadmium pollution accident in Beijiang River in 2005
Beijiang River is one of the three major tributaries of the Pearl River, and it is also an important drinking water source for Guangdong cities. In June 5438+February 65438+May 2005, serious cadmium pollution occurred in Shaoguan section of Beijiang River, and the cadmium concentration in Gao Qiao section exceeded 12 times. Shaoguan is located in the upper reaches of Beijiang River. Once pollution occurs, it will directly affect the drinking water safety of tens of millions of people in downstream cities. Through investigation, it was found that the cadmium pollution accident in Shaoguan section of Beijiang River was caused by excessive discharge of cadmium-containing wastewater by Shaoguan Smelter during equipment maintenance, which was a serious environmental pollution accident caused by illegal and excessive discharge by enterprises.
The Dead Fish Event in Baiyangdian in 2006
In February and March of 2006, a large-scale fish death occurred in Baiyangdian, the largest freshwater lake in North China, which is known as the "Pearl of North China". The investigation results show that serious water pollution and low dissolved oxygen in water are the main reasons for fish suffocation. This incident caused 96,000 mu of water in Renqiu City to be completely polluted, and the water was black and smelly. All the fish cultured in cages died, a large number of dead wild fish floated in the lake, and some aquatic plants died black.
The lively pollution incident of Niuhe River in 2006
On August 2, 2006, Kloc-0, the reporting center of Jilin Environmental Protection Bureau received a report from the masses that chemical pollution occurred near Mangniu River. After field investigation, it was found that some water quality was red with a little foam. The pollution zone is about 5 kilometers long, and the pollutant is dimethylaniline. It is understood that the accident was caused by Jilin Changbai Mountain Fine Chemical Co., Ltd. artificially discharging chemical wastewater into Mangniu River.
Arsenic pollution in Yueyang, Hunan Province in 2006
On September 8, 2006, a water pollution incident occurred in Xinqiang River, a drinking water source in Yueyang County, Hunan Province. Arsenic exceeds the standard by about 10 times, and the drinking water safety of 80 thousand residents is threatened and affected. Finally, after verification, it was found that the pollution was caused by the daily discharge of industrial sewage from three chemical plants in the upper reaches of the river, which led to a large number of high-concentration arsenic-containing wastewater flowing into Xinqiang River.
Taihu Lake Water Pollution Event in 2007
Since May 29, 2007, the tap water quality of a large number of citizens' homes in Wuxi, Jiangsu Province has suddenly changed, accompanied by an unpleasant smell, which makes it impossible to drink normally. The drinking water source of Wuxi citizens comes from Taihu Lake. The reasons for this sudden change in water quality are as follows: since the summer, the water level in Taihu Lake in Wuxi City has been the lowest in 50 years, coupled with the continuous high temperature and lack of rain, Taihu Lake is seriously eutrophic, which leads to the early outbreak of cyanobacteria in Taihu Lake and affects the water quality of tap water sources. Wuxi citizens have rushed to buy pure water in supermarkets, and the price of bottled pure water in street retail has also fluctuated greatly.
Cyanobacteria Outbreak in Chaohu Lake and Dianchi Lake in 2007
In June 2007, cyanobacteria also appeared in Chaohu Lake and Dianchi Lake to varying degrees. A large area of cyanobacteria with an area of about 5 square kilometers appears in the western half of Chaohu Lake in Anhui Province. Because the western half lake is not used as drinking water source, it has little impact on the local area, but with the continuous high temperature, cyanobacteria have also appeared in the eastern half lake of Chaohu Lake. Dianchi Lake is also sweltering for several days, and cyanobacteria multiply in large numbers. On the bank of the ridge line in Dianchi Lake, Kunming, the lake is like green paint, accompanied by a stench. The continuous outbreak of cyanobacteria in Taihu Lake, Chaohu Lake and Dianchi Lake has sounded the alarm for the comprehensive management of water pollution in the "three lakes" basin.
Water Pollution in Shuyang County, Jiangsu Province in 2007
At 3 pm on July 2, 2007, the monitoring of the surface water plant in Shuyang County, Jiangsu Province found that the water intake of the water plant located in Huaishuhe River was invaded by a large amount of sewage for a short time, and the domestic water supply source in the urban area was seriously polluted, and the water flow showed obvious odor. After water quality testing, the ammonia nitrogen content in the water at the water intake is about 28 mg per liter, far exceeding the national water quality standard for water intake. Because the treated water quality can not meet the drinking water standard, the urban water supply system was forced to close, and the draft and water use of 200 thousand people in the urban area were affected to varying degrees. Until the morning of July 4, the water intake of the waterworks closed due to drinking water pollution was reopened, the normal water supply in Shuyang City was fully restored, and the water supply in Shuyang County was stopped for more than 40 hours.
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