Water quality

“ The farmland irrigation water shall meet the water quality standards to prevent the contamination of soil, groundwater and agricultural products. The competent departments of ecology and environment under the local people's governments shall, together with the departments of agriculture and rural affairs, and water resources, strengthen the management of the quality of farmland irrigation water and conduct monitoring, supervision and inspection over the quality of farmland irrigation water. ”

“ QUALITY OF POLLUTION.
Scientists tell us that it is not so much the quantity as the quality of the sewage:
“It is true a large amount of refuse material is of such character as to be, except in excessive quantities, of no appreciable influence on the human system; the addition of the inorganic compounds of lime, soda, potash, etc., would have no deleterious effect; in fact, although the lime compounds increase the hardness of water, and make it less desirable for washing, the presence of a moderate amount of mineral substance makes the water more palatable and very probably more wholesome. ”

“ It is part of the USDA’s effort for helping farmers and rural residents understand water quality problems, where they occur, and their dimensions. The USDA is working with other federal agencies and the states to help farmers operate in a way that minimizes or prevents pollution form agricultural sources. ”

“ The prevention and reduction of air and water pollution will remain a critical task of resource conservation. Air and water quality come under pressure from such activities as fertilizer and pesticide use. ”

“ Objectives The Midwest/Mid-Continent Initiative will evaluate the influence of farming practices and systems on groundwater quality and assess the economic and social characteristics of various farming systems needed for enhancement of water quality. As with any research, the ultimate goal is technology transfer. ”

“ A paramount aim of the USDA Initiative is to provide agricultural producers with the knowledge and means to voluntarily take action on their water quality concerns. Because it is difficult to accurately relate improvements in water quality to specific changes in agricultural management, the assessment will emphasize the implementation of land treatment measures that improve the efficiency of nutrient and pesticide use on problem soils. ”

“ Water from a pond or lake has one great advantage over water from a brook, namely, that contaminating substances in the pond settle out, so that pond water, especially if the pond is deep, is always of much better quality than running water. For this same reason, water taken from a reservoir on a stream is much better water than that in the stream above the reservoir indicates, and pollution is much less to be feared where the reservoir exists. ”

“ To coordinate USDA’s water quality work with that of other federal agencies; To inform the public regularly of USDA’s progress and initiatives in water quality. USDA Water Quality Policy One subgroup of the working group, chaired by Vivan Jennings of the Extension Service, is now analyzing USDA’s current water quality policies with an eye toward updating them to meet current needs. The subgroup’s forthcoming recommendations will ensure that USDA maintains a high profile and a leadership position on this issue. ”

“ Federal and state agencies, and the animal industries, are actively seeking ways to minimize the negative effects of animal production on water quality. Commodity group representatives requested increased educational programs and technical assistance to cover all aspects of animal waste management and water quality. ”

“ Expectations Hydrologic unit areas, demonstration projects, and special projects will encourage landowners to respond voluntarily and independently to water quality concerns and farm or ranch management needs. As new technology becomes available, it will be used at existing and new locations. ”

“ West Virginia studies of the bacterial quality of water passing through activated charcoal filters, show promise for cleaning up drinking water in home water systems. In Washington and Oregon, economic costs are being determined of farm management changes that could result from policies to abate possible nitrate build-up in ground water. ”

“ Protection of groundwater (OR = 0.26 [95% CI 0.11–0.60] ; p = 0.002; Table 3) and treatment of piped water (OR = 0.07 [95% CI 0.02–0.27] , p<0.001; Table 3) were both strongly related to better water quality. Contamination of stored water was more likely than water at the source (OR = 2.09 [95% CI 1.16–3.78] , p = 0.015; Table 3) , including for piped supplies (OR = 2.35 [95% CI 1.08–5.12] , p = 0.032; Table S1) .
Within Studies Analysis: Meta-analysis
Figure 4 is a forest plot showing the ORs of contamination for improved sources compared to unimproved sources from eligible studies. ”

“ The control of sewage treatment plant effluents so as to avoid the poisoning of fish life or the contamination of shell fish is likewise important. The study of plankton and macroscopic life in the treatment of sewage is an open field for research.
216. Variations in the Quality of Sewage.—The quality of sewage varies with the hour of the day and the season of the year. Some of the causes of these variations are: changes in the amount of diluting water due to the inflow of storm water or flushing of the streets or sewers ”

“ Conditions have improved steadily during the past century, and this trend continues. although the pace varies between and within cities. 19. In most urban areas, almost everyone is served by refuse collection today. Air quality has generally improved, with a decline in the emission of particles and sulphur oxides. Efforts to restore water quality have met with a mixed record of success because of pollution from outside of cities, notably nitrates and other fertilizers and pesticides, Many coastal areas, however, close to major sewage outlets, show considerable deterioration. ”

“ We desire drinking water of the highest quality and realize that our large water supply is neither limitless nor without expense. Knowing that good drinking water is a precious resource and one of the world's most important products, we need to continue to understand and identify potential hazards, how such hazards enter our water supply, and the best means to eliminate them. ”

“ Farm*A*Syst is unique because it comprehensively addresses potential groundwater contamination from 10 significant potential sources near the farmstead drinking water well. Farmers and rural residents use Farm*A*Syst to assess current structures and practices such as pesticide and fertilizer mixing, loading practices, and maintaining petroleum product storage tanks. Site conditions that affect pollution vulnerability are assessed to help farmers prioritize actions to reduce or prevent pollution. ”

“ This is particularly true where families have been accustomed to utilizing municipal water supplies which are safe and pure as to quality and unlimited in amount. In most country homes it is necessary to construct a water-supply system, which means reaching a supply of underground water, pumping [Pg 56] it to the surface and piping it to locations where it is wanted. Higher standards of living create new and increased demands for water. ”

“ The effluent which is turbid, putrescible and rich in organic matter cannot be discharged into streams with safety without further treatment, unless the volume of water is sufficient to complete the purification by dilution. ”

“ Water is essential to every form of life on Earth. Indeed, this vital substance unites our planet's ecosystems, the miraculous yet fragile relationships in nature that sustain each other as well as all human activity. Recognizing the importance of our precious water resources, the United States has made a firm commitment to protecting their physical, chemical, and biological integrity. This year, the 20th anniversary of the Clean Water Act reminds us that we are all stewards of our water resources, and, as such, we are responsible for their preservation and wise use. ”

“ In addition to this it must be understood that, owing to the great losses by evaporation and by growing plants, which are continually at work on sewage farms, especially during the summer months, when, as a rule, the flow of water in the brook that takes the effluent is smallest, the quantity of the effluent from the natural treatment is probably only from one-half to one-third that resulting from the artificial treatment, which is a point of very great importance. ”

“ In populous districts, in villages, towns, but also near habitations, the soil from which water is obtained must, of necessity, be impregnated with organic waste matter. If, in such a surface well, the level of the water is lowered by pumping, the zone of pollution is extended laterally in all directions. Ordinary shallow well water should always be considered "suspicious water." ”

“ We have taken great strides during the past two decades, primarily by controlling pollution from sewage treatment plants and industrial facilities. Recent advances in science and technology have enabled us to engage in more effective studies of water pollution—its causes and its effects. ”

“ Such water, when it penetrates only to shallow wells still retains a considerable proportion of its polluting organic matter in an unoxidized condition: but when it descends through one hundred feet or upwards of porous soil or rock, the exhausted filtration to which it has been subjected in passing downwards through so great a thickness of material, and the rapid oxidation of the dissolved organic matters in a porous and aerated medium, afford a considerable guarantee that all noxious constituents have been removed.”— (Rivers Pollution Commission, 1874.) ”

“ The pollution of wells, if it exists at all, is usually very pronounced, and it is probably safe to say that, except where buildings, drains, or cesspools have been crowded too close to wells, or where some manifest and gross cause of pollution exists, a well water is safe to drink. ”

“ The shallow well, however, rarely supplies enough water for more than a few houses, and being commonly situated near to those houses the water is often seriously polluted. Deep wells owe their comparative immunity from pollution to the circumstances that the larger quantity of water yielded renders it worth while to pump that water and convey it by pipes from comparatively unpolluted areas ”

“ Americans use well over 100 billion gallons of water every day; the water that sustains and nourishes us must be safe, and agriculture and industry alike require clean water. Because clean water is the basis of life for myriad species of animals, clean rivers, streams, lakes, estuaries, and oceans are essential. ”

“ POLLUTION OF WELL WATER.
It is stated that about fifteen millions of the British population live in towns and urban districts. Even if we assume, [39] which is not yet the case, that all these people are supplied by water-works, the remaining twelve millions of county population derive their water almost exclusively from shallow wells, and these are, so far as our experience extends, almost always horribly polluted by sewage and by animal matter of the most disgusting origin. ”

“ Not only is water hard to get, comparatively speaking, but it is not always safe to use when obtained unless care is taken to see that its source is pure. Water cannot safely be declared fit for human consumption unless the surface of the well or spring remains permanently above the level of all nearby sources of pollution. Tight well platforms and casings, clean grounds and wide separation from probable channels of impure drainage are the best safeguards. ”

“ In view of the imminent danger always possible wherever human wastes are directly discharged into streams, whether from privies or sewers, it is obvious that water so contaminated should never on any account be used as drinking water. It does not follow, because a stream so contaminated has been used for months or years without producing any evidence of disease, that the water is safe. ”

“ To the surface of the earth we owe thus a purifying influence whose activity furnishes us vegetation and food on the one hand and preservation from disease on the other. This purifying power is not possessed by the deeper layers, and therefore the percolation of organic refuse into them from deep cesspools is wasteful to agriculture and dangerous to our storehouse of drinking water.
Even the surface of the soil when overloaded with sewage loses partially its power of purifying the organic matter. ”

“ There are various ways of making sure that water is fit for human consumption. One way is to secure the supply from a source which is by nature free from pollution, from deep-driven wells or from mountain lakes which are above the level of probable contamination. ”

“ Certainly any direct drainage into the streams should be cut out, as well as the drainage from barnyards in the immediate vicinity of the point where the water is taken out. Just what percentage of pollution may be eliminated in this way it is impossible to determine, but it is not too much to say that no brook or pond should be used for a water-supply of a house unless every known pollution of an organic nature has been removed. Under the most favorable circumstances there will be enough accidental contamination to make the water at times dangerous, and no added risks ought to be assumed. ”

“ From a comparison of data in regard to the actual purification of polluted streams we may draw the following inference: Rivers not to be used for water-supplies, but to be inoffensive to communities , residing a few miles below, to remain fit for ordinary manufacturing purposes, and to sustain the life of fish, may receive the sewage from one thousand persons for at least every one hundred and fifty to two hundred cubic feet of minimum flow per minute, supposing that natural subsidence of the heavier matter takes place immediately below the town discharging the sewage. ”