Laserfiche WebLink
<br />o <br /> <br />..... <br />~ Several systems deliver waters that exceed recommended <br />~ limits for nitrate and fluoride. Phoenix, Arizona, for example, <br />~ has several wells that produce water having nitrate concentrat- <br />ions in eXcess of 100 mg/l. The Standards recommend ,a maximum <br />of 45 mg/l. A few localized problems exist where systems are <br />high in toxic materials such as arsenic and hexavalent chromium. <br />While some of the systems are high in fluoride, the majority of <br />the populace are served water deficient in fluoride from the <br />standpoint of prevention of dental caries in child~en. <br /> <br />The intensity of water supply surveillance programs has <br />tended to decrease in recent years primarily due to increased <br />emphasis qn water pollution control. Municipal water supply <br />system surveillance is essential since many drinking water <br />problems are due to inadequate water treatment and protection <br />after treatment. <br /> <br />Water resource development agencies should prevent any <br />addi tional decline in the quali ty of drinking waters. and bring.' <br />presently deficient supplies up to standards. Public water <br />supplies should be provided from the best existing high quality <br />waters. <br /> <br />Efforts should be made to upgrade the potable, water systems <br />developed for campgrounds in recreational areas. The bacteriolog- <br />ical quality of many of these supplies is already unacceptable <br />by the Public Health Service Drinking Water Standards. <br /> <br />Increased vector control activities will be needed in the <br />future to ,c;:orrect present deficiencies and prevent the <br />occurrence of new prOblems. Mosquito breeding locations should <br />be eliminated during water resource project construction if <br />possible. A need exists for increased health department <br />surveillance and mosquito abatement district operations in much <br />of the Region. <br /> <br />Increased pressures on available recreational areas, public <br />water systems, and waste disposal facilities as a result of <br />population expansion will require ever increasing vigilance on <br />the part of health departments and water and wastewater works <br />personnel. The need for increased emphasis on the part of water <br />resourc;:es development agencies in helping to minimize the risk <br />of spread of infectious diseases is also indicated. <br /> <br />s <br /> <br />The problem of disposing of solid wastes will be one of <br />ever increasing difficulty. It is estimated that over 700 and <br />3,100 acres per year of storage volume will be necessary for the <br />disposal of household, municipal, and commercial solid wastes <br />in the years 1980 and 2020, respectively--assuming the use of <br />sanitary landfills. Solid wastes from industry and agriculture <br />will exceed the municipal wastes in tonnage bya large factor. <br /> <br />vii <br /> <br />