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56 <br /> (Page 2 . 3-12 ) <br /> this treatment process is so high that extreme financial burdens <br /> could be placed on smaller systems . <br /> Orange County is fortunate that its public water suppliers draw <br /> water from upland supplies contained within the County. University <br /> Lake Watershed is the most developed of the six water supply <br /> watersheds in the County, located just west of Chapel Hill and <br /> Carrboro. The watershed, along with the Cane Creek 'watershed, is <br /> classified by the North Carolina Division of Environmental <br /> Management as WS-T , meaning it is relatively undeveloped and has <br /> no point source discharges of pollution. Of the 19, 600 acres in the <br /> University Lake watershed, only 8% is considered developed. The <br /> watersheds of the Little River, Back Creek, Upper Eno and South <br /> Hyco watersheds are .[ `04#00 40 :•{: •:: <br /> �:,,,,.,; �; .}}},.�, rural in nature and <br /> free from potential '+r concentrat `•sources Of. Pollution. <DELETED> <br /> Durham has requested a WS-I classification for the Little River and <br /> Flat River watersheds, while Graham-Mebane has requested a WS-II <br /> classification for the Back Creek watershed. The projected water <br /> qt:'.lu:+;M:::.:n;{..:.i:.:.a:v y:•.:",'•:.:.::::.}.�:.:...,:l:.:::.{'Y:r::w•{.e•:i.:.::ii:.£•::r;y.{ty:c}%.:k•:..r'::w6r€np..y:•4}.''i f}...�.•i..:ti r.l.'.•.�;.;.o.:c m.ti3•:.;..:}..iJ:....':�5{.w�'•..;'.e.these <br /> '#.t{watersheds.tr..}'...ti•:iw.�..•io,o-.s m4....,•.:+•.Q r.:,h Se..w.•.:{, <br /> x:y,:p::.•}:e• .c~.�}'."{•,,Y.nr,.;ivt.'.n,n�'•4 e{nY, <br /> d <br /> to <br /> b>R?i• <br /> e `i`•';':::frs.:'x}}i.:iirio}si:•}�;od..;.:.•$..<{ <br /> D�t\E':LETEDM <br /> > <br /> : . n ^ v :..v ; rv}�t f a�}0 ��ia� � � •g { {ar 4 * <br /> e <br /> Y <br /> o:f:V }� 44 t •.it v xv J.. : w* Yp 0 �,�}i 0x ?� ii > �!!i.% <br /> . <br /> ." .: <br /> ` <br /> ' Ie + ' vt vN .a yr 3�e„ <br /> Watershed Classification Table <br /> The sources of pollution which have been discussed so far, are <br /> called "point sources" of pollutants. Point source refers to <br /> pollutants from a specific fixed source which enters the water at <br /> an identifiable point. An example would be the outfall pipe from <br /> a sewage treatment plant. Other sources of pollution are called <br /> "non-point sources. " These are pollutants which reach receiving <br /> streams in a diffused manner and cannot be attributed to an <br /> identifiable or specific source. An example would be the pollutants <br /> that accumulate on a parking lot or road and are washed off in a <br /> storm. Studies around the nation have revealed that non-point <br /> sources of pollution are equally, if not more important, <br /> contributors to poor water quality than point sources. <br /> The same studies reveal that non-point source pollution generation <br /> is a function of land use. Areas which are mostly forested have the <br /> lowest amounts of pollutants in the water that runs off the land. <br /> This is because forested areas have a greater ability to slow <br /> runoff and assimilate pollutants present in the runoff and lack the <br /> urban activities, such as concentrated automobile usage, that <br /> produces pollutants . <br /> In a forested area, only a small percentage of the precipitation <br /> washes off the land into the nearest stream. The ground cover in <br /> forested areas slows the velocity of runoff and allows water to <br />