Water pollution reason in bengali
Answers
Answer:
জল দূষণ হ'ল জলাশয়ের দূষণ, সাধারণত মানুষের ক্রিয়াকলাপের ফলে। জলাশয়ের উদাহরণস্বরূপ হ্রদ, নদী, মহাসাগর, জলজ এবং ভূগর্ভস্থ জলের অন্তর্ভুক্ত।
and unregulated small scale industry. Most rivers, lakes and surface water in India are polluted due to industries, untreated sewage and solid wastes.[2][3]
The issues Edit
Untreated Sewage Edit
A 2007 study found that discharge of untreated sewage is the single most important source of pollution of surface and ground water in India. There is a large gap between generation and treatment of domestic waste water in India. The problem is not only that India lacks sufficient treatment capacity but also that the sewage treatment plants that exist do not operate and are not maintained.[citation needed]
The majority of the government-owned sewage treatment plants remain closed most of the time due to improper design or poor maintenance or lack of reliable electricity supply to operate the plants, together with absentee employees and poor management. The waste water generated in these areas normally percolates into the soil or evaporates. The uncollected waste accumulates in the urban areas causing unhygienic conditions and releasing pollutants that leach into surface and groundwater.
A 1992 World Health Organization study reported that out of India's 3,119 towns and cities, just 209 have partial sewage treatment facilities, and only 8 have full wastewater treatment facilities. Downstream, the river water polluted by the untreated water is used for drinking, bathing, and washing. A 1995 report claimed 114 Indian cities were dumping untreated sewage and partially cremated bodies directly into the Ganges River.[4] Lack of toilets and sanitation facilities causes open defecation in rural and urban pill areas of India, like many developing countries.[5] This is a source of surface water pollution.
IndiaPollution.jpg
Sewage discharged from cities,towns and some villages is the predominant cause of water pollution in India.[1] Investment is needed to bridge the gap between sewage India generates and its treatment capacity of sewage per day.[6] Major cities of India produce 38,354 million litres per day (MLD) of sewage, but the urban sewage treatment capacity is only 11,786 MLD.[7] A large number of Indian rivers are severely polluted as a result of discharge of domestic sewage.
The Central Pollution Control Board,a Ministry of Environment & Forests Government of India entity, has established a National Water Quality Monitoring Network comprising 1429 monitoring stations in 28 states and 6 in Union Territories on various rivers and water bodies across the country. This effort monitors water quality year round. The monitoring network covers 293 rivers, 94 lakes, 9 tanks, 41 ponds, 8 creeks, 23 canals, 18 drains and 411 wells distributed across India.[3] Water samples are routinely analysed for 28 parameters including dissolved oxygen, bacteriological and other internationally established parameters for water quality. Additionally 9 trace metals parameters and 28 pesticide residues are analysed. Biomonitoring is also carried out on specific locations.
The scientific analysis of water samples from 1995 to 2008 indicates that the organic and bacterial contamination is severe in water bodies of India. This is mainly due to discharge of domestic waste water in untreated form, mostly from the urban centres of India.
Organic matter Edit
In 2010 the water quality monitoring ts by about 2020.
