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<br />NATIONAL WATER-QUALITY ASSESSMENT PROGRAM <br /> <br />.... <br />,;0. <br />o <br />"'" <br /> <br />THIS REPORT :-UOlmanLt".. major findings about water quality in the L;ppcr Colorado River Ba"in Ihat emerged <br />trom an a"se.....mcnt conducted nt"tween 1990 and 1995 hy the U.S, GC\llogh:al Surn~y I GSGS, .\'ational Water- <br />Quality A:-."es'imCnll;-';:-\\I.,'QAJ Program, Water quality i.. Ji..cu,""cJ 1D tem}'_ Ilf lo.;,:al and regional i"sue... and <br />l:Olllpared lO condition" found 10 all .~6 .\'..\\\'Q.-\ "Iudy area.... called Study l.nih. d"...e......l'J 10 dalC'. Finding.. are aJ<,o <br />explained In the l.:ontexl of ..r:Je('led natIOnal ht'llchmark". "u..'h <I' ih(l..e hIT drinkIng \\ater quality and the <br />prolcdll1O of JLjuatlc organi..m.... The .\'AWQA Pwgram \\a.. not intended It. a.....,e..;" the quality of the :'\arion..... <br />drinking wal(,f. such;,!.'- by mnniwrmg water from hl1u..t'hold t~lr". Rather. the a<,<,e;:-..Slllenb fOl;u" \Ill the quality of <br />thl." rl.":o;oun:e 11,1."](. thereb~ comp]emt.'nlm~ Illan~ onguing FeJt'ral. Slate. and local dnnking.walt.'r mOnitoring <br />program.... The \:ompansuns made III thl" report 10 drinil:ing-\\ater "landard.. and guideline... are only in the L'oflteXI <br />of lilt' ~l\ ailable umrealeJ re";IJurl;e. Fin;llly. ttll''' rcppT( indlldl'.. Infnnnallon ;tPOllt lht" ...taw, 01 alju~HI"" C\JIll- <br />lllunitie;; and the- ....ondilion (If instre-am habita" a~ e-Iemem.. of a ....olllPlete \~'-I(e-r-4ualllY a......t.':....me-llI. <br />:\lany topics ...lIvered In this rt'pllTt retkct the l'llnce-rn.. of oftkiab of State- and F('dl'ral agt'nlie-.... wate-r-resuurcc <br />managl'r'o. and mem!'lcr... of :o.lakchnlde-r ~r(\lIp" \I,.-ho pnl\illed <lllviLe amllnpUl Junng the L:pper C\lloradu Rin:r <br />Basin a..."c""'1llenl. Basin residcnh '.\.ho wish to know nwn." atlnut watl'r qU<l]it~ III the- area... whl.rc Ih...y lin' wil] find <br />tIll.. n:p,m informatiH':I" well. <br /> <br /> <br />UpperColo.adoRlv\!'.Basin <br /> <br />NAWOA Study Unlls--- <br />As-5eSlifOOnlschedu'" <br />_1991-95 <br />a 1994-98 <br />.1997-2001 <br /> <br />I <br />L- <br /> <br />.II < <br />" <br /> <br />..~! <br />".. <br /> <br />~NQTy"Isc."edulad <br />~HlghPla'nsFleg>onal <br />G.ouodWaTmStudv. <br />1999-2004 <br /> <br />~ ,~ <br /> <br />. <br /> <br />rilE ;o..;,,\\H.}A I'I{O(;I{A.\I...ecb III impf(we "'l'IClllitk and publk under"landing 01 water qualil~ in the Nallon'" <br />major f1n'r ba"ln" Jnd gwund.water "~~te-m". Bt'tler under"tand1l1g f;Jcilit;\te-... e-ffecll\'l' rl'~oun:e manageml.nt. <br />.,ccurale identitication of wah,'r-lluilliIY prioritle-.... and :,>un:es,ful dCh'!llpm...nt of stralt:gil'~ that prote-cl and <br />rl....tore \~;Her quality. Guidr:d by a natlonal]y nlllsl"te-m ...tud~ dt'sign ;llld ..h<lPl'J by llngoll1g communil.alllln <br />with !lll'al. State. and Fedl'ra] agencie:o., :\"\\\.QA a..."es..menls "uppl)f\ the 1I1\e-~ligatllln ollo....a] i.....ues and trend" <br />\\hik' pnl\'iding a tinn fllundation f{)r underqandlllg waler ljualitY;1I re-g\llllal and national "cale..., The ability to <br />lIltr:gr:ne kX'al and n:nional :'>ca1c~ nr dala ....ollection and analy,is I, ~luni4ul' feature of tht' USGS NA\\'Q:\ <br />Pmgram, <br />The t'pper C(llorada Rl\'er Ba~in is 11nl' llf 51 water-quality a.."e"..ments 1I11tiateJ ,ince I()YI. when the U.S. <br />Clmgre..s approprialed fund, for lhr: L'5GS to t.egin the :\A\\'QA Program, ..\... Illdlcate-d 1m lh.:- map, :II) <br /><l'''t'''''lIlent... haw' been l.\lmpleted. and 15 more ;j.....e....ments will....ondude in ':lll) I. C\lllel'tiw]y. the,e as..e-s<,mellts <br />".(WeT a~l)ut ('lll'-ha]f of thl' land area of the- L:mte-d St~lI('.. and indude- water r.:-..our....e.. thaI ~lfe a\'3.i]able to mare <br />lhan 60 peTl'ent af lhl' LT.S, popu]::Hlon. <br /> <br />IV :O-:,,,,onal Waler-Quali" "-",e"menl Program <br />