who agricultural waste cause water pollution
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Water pollution from and to agriculture

Inspire action to achieve the 2030 Agenda
December 9, 2017
Food and Agriculture Organization of the United Nations
Water quality in agriculture, in other words water pollution from and to agriculture, is a focus area for Food and Agriculture Organization of the United Nations (FAO), under which different global and national projects and programs are identified. FAO looks at agriculture as a cause and victim of water pollution, and based on that defines water quality related activities in two categories:
Agriculture as a water polluter: cause
Agriculture accounts for 70% of total water consumption worldwide and is the single-largest contributor of non-point-source pollution to surface water and groundwater. Agriculture intensification is often accompanied by increased soil erosion, salinity and sediment loads in water and by the excessive use (or misuse) of agricultural inputs (e.g. fertilizers) to increase productivity. Pollution caused by agriculture can contaminate water, food, fodder, farms, the natural environment and the atmosphere. Pesticides and fertilizers used in agriculture can contaminate both groundwater and surface water, as can organic livestock wastes, antibiotics, silage effluents, and processing wastes from plantation crops. Pollution caused by large-scale industrial farming (including livestock and fisheries) is categorized as point-source pollution, and pollution caused by small-scale family-sized farming is considered non-point-source pollution. One of FAO’s mandates is to work closely with countries and other UN and non-UN organizations to monitor, control and mitigate pollution loads from agricultural activities, as well as the negative impacts of agricultural pollution on people’s health and the environment. In tackling this challenge, FAO takes a multidimensional and ‘nexus’ approach to ensure that all aspects are covered – that is, socio-economic, health, environmental and food safety.
These activities are aligned with the Sustainable Development Goals (SDGs), especially SDG6, and target 6.3.
Agriculture as a user of marginal quality water (e.g. untreated wastewater): victim
With increasing demand for agricultural commodities, farmers are looking increasingly at non-conventional water sources of marginal quality, including wastewater. Domestic and municipal wastewater presents an attractive option because of its high nutrient content, especially when conventional water resources are scarce or lacking.
The unsafe use of non-conventional sources of water – especially wastewater – in agriculture can lead to the accumulation of microbiological and chemical pollutants in crops, livestock products and soil and water resources and ultimately to severe health impacts among exposed food consumers and farm workers; it may also exacerbate antimicrobial resistance. If adequately treated and safely applied, however, wastewater can be a valuable source of both water and nutrients and thereby contribute to food security and livelihood improvement.
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Farmers are using Fertilizer and pesticides to increase their production, and Chemicals from fertilizers and pesticides make their way into the groundwater that ends up in drinking water. in this way it cause water pollution.