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<br />EVALlJAT!UNS SF EXISTlllG :::ALLlH?{ --:e;r:DITI' ,NS
<br />
<br />VirGin Ri....er at Littlefield. A:d::or.a (S:ati..:.:-, :';0. 14).--Flo..... recor1s
<br />are a~ailatle :or t~e rep~rt perioa, but q~al~~y la~a are a~ailatle only
<br />~~O~ J~' 1949 to ~ece~ber 1970. ~etailed correl~tion: Nere e~pl~/Qd to
<br />e~t:.r..ate th~ :fata for t-he r:".issin~' period.
<br />
<br />'~olorado hiver belm.' Hoover i.iaY.:, Ariz.OW.i-I,':::'3.h '::t.a'~lor, ;'10.15).--
<br />uis:::harr--;e and 1ualit~,' records are :'!'lallabl'~ :"o!' t~;c 1941 :01970 !'eport
<br />period '~:-:ceI-,t 1"01' the rer:'oJ :;OY~!'!'.t'e!' 11)44 to ::c: 1.'-:[:'l:,er 1950. ;.:,uality
<br />:l.at.a "or t:,is nerlod ';ire ~as' '_1 O:l ~:i='~ :i..l~ .' h:.'~','lC'~( ...:11.), '~!,e~nJ.(,ll
<br />'3.n3.lyses or;ly.,:.t. inter!:'.itt(;:.t .:..,:tcrV,.l.i::.
<br />
<br />C01orado ?:. -,'er bela;.; Parker Da..-.. f..rizana-::ll i~-' ',rr::.i;j :tHtisn Un. l' ).
<br />--~lo....' records for th~ report period ar''.:! available for tn", ;".ological
<br />Survey i!!lE:e bela..... Parker :'8.":1. The -....ateI' 'wality (h,tl.;. f"!" th,.. l'''riod .~ar:-
<br />uar:r 1,~)4 through Dec~!'J'.ber 1-'70 ....-ere taJ.:en at th" ,eol: ~.i'~~,l Z\.C'vcy C+.a-
<br />t::'on. f"olorado F.iv~r belo..... P~keT Ja~. TI',~ .....atC,l. !uulty rh-:a for th~
<br />p~riod Tanu'u7 101.1 thr-mg.'1 Dece...~ber F'.3 -...~r0 ad,;]ll::;t~d b:/ ~0rrclatif)!1
<br />with the samples taken by the Metropolit'1."'1 "{l1ter !1ist1'ict ')f :->mthern
<br />California. which takes s3!!Iples at tile Lake :avnsu Intak0 I"--,--..-::ping Plant.
<br />
<br />. 1 'R r t T. . ._T j. .,t'1;.;(",".. ....c. "I).
<br />(.0 or3.u.o Li-/f'; n. L.':Derin..L ;)'UIl. .....'...:~.)na-.::w.i.,.)!.J.:>... _ __-'_ _
<br />--A.lt.:~ou,,:i: Fir,..l1'c 2 in-ii'-.:h"Ces :.lr,.... recori!; CU"- <.i'.'ai12.l'!.<:' :.c1' t';e r'~:"o1't.
<br />period, no siLl-Ie stat10n ....,3.::> usej to obt.air. t:lC !"'::r:O-,-J. c. .....a:: c::tained
<br />from '1 ,~omtil;ht.lon 0:. se'/er3.1 statlor;s. 'e.::orl;:: ."'ron .!\.r.Ua.ry lS.41 tr-..roueh
<br />September 1942 3.re fro!':\ -'.:1~ sta.tler.. '')lor::do hi :'';:1' near P: :3.C~o. :ali-
<br />fond::!.. Recor is :.rorr,,_ctotcr 1942 t:U'QU,t'; Ser.te!:1t.~r 1960 are based on
<br />the ~o!:1hined !'8cords of lischarge o"ttained 8.t ,'Cl,~ir.':- :>tation.:: on Colorado
<br />River at YUI:'la, All-American ::anal ne:u- Imperia.:. iJ'l1:l, .;ila lJra-,rity :.:ain
<br />Canal at Imperial ~i~, Yu::'"A :.~ir. Canal at ;..a0ln:l. 13.,.". .;tni :brtr. :iila
<br />Valle:.' Canal at 1a(~1.ma ;J,un lezs that 01" :.:;110. Ri.,er near Dome. J\ri7.or.a.
<br />Records after Septc!':'Jber 1960 are based on the cO!."':bir;edloci.l:,' discharge
<br />ot" Colorado River passing L":Iperial Da.":: and 'It ,~a!:;in,- stations on A11-
<br />f~merican Canal near Imperial D!llf. and ::ila :Jr3.':it:r '~:r: ':anal "it Imperial
<br />D3..'r..
<br />
<br />Io{uulity lata f!'O!!1 191.:.3 trl!"OUi:l :doter 19"'.J .....cre obtair.'-o:d fror.: Geo-
<br />10[ical Sur-:e:,' recor.js ar,-i '":l.re cased on :lata :~cr -.::.e ..tt:,::Ja ".':ein ':anal te-
<br />10\\ t.::.e Coloradc Hi'ler Sir::.OL. 1':;e ."ater ~ualit.y :uta "C;!. .:o'/ember and
<br />Dece~.ber 197\..1 '..'ere obt.air:e,i ,.rem ~!;e ai."ar'.':~ J. '0_, -i:-<;:...:. S'J..!'.:ej. recor:i::
<br />for t.he ....a-::;e1' 1ual1ty statlor:. a.t ':':r.;er-ial :-::.........
<br />
<br />3. -::1er :.;uality of \\.ater St.atior.!C
<br />
<br />In a idi ...iO:1 ~O :!le !i.ej" statiOi:S lis":'.l~,,,-eJ 3.l::o':e. '.:.:-:ere are r.'.a.:1;/ !l:o!'e
<br />po':":-.ts s.:. ...'~.i.:L ....ater 1W1L__,-:: ci.a.",a are ort.a.:1..::e_l, 0:::: 0.. ....hese sa::;;-lili.~
<br />s-:aticLs are operate:! Cj' t!:.e Jeolob'ical S'.rr"le::: nO'...e'-.er, sO!':'.e al'e oper-
<br />ated hy ot.~er ?e:le!'al. S:a'.:.e, anl ;!'i,ate afen~ies.
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