international paper ouellette argued november decided january clean water act act prohibits discharge effluents navigable waters unless point source obtained permit environmental protection agency epa act also allows state point source located source state impose stringent discharge limitations federal ones even administer permit program certain requirements met contrast affected subject pollution originating source right notice comment issuance federal source state permit act also contains saving clause consisting provides nothing chapter shall construed impairing right respect waters including boundary waters othing section shall restrict right person may statute common law seek enforcement effluent standard limitation seek relief petitioner operates paper mill new york side lake champlain course business discharged effluents lake diffusion pipe ended shortly new border divided lake respondents property owners vermont shore filed class action petitioner vermont state vermont common law nuisance action later removed federal district petitioner moved summary judgment judgment pleadings ground act respondents suit district denied motion holding act saving clause preserves actions redress interstate water pollution law state injury occurred appeals affirmed held act common law affected state extent law seeks impose liability point source another state pp since act applies point sources virtually bodies water sets forth detailed procedures obtaining permit provides elaborate set remedies violation sufficiently comprehensive raise presumption congress intended suits except specifically preserved act terms pp act saving clause read broadly preserve right bring suit law affected state section merely protects suits act citizensuit provisions purport preclude provisions furthermore read preserve state authority respect effluent discharges within state pp application affected state nuisance law point source another state constitute serious interference implementation act effectively override epa permit requirements policy choices made source adopting standards engender confusion subjecting point sources variety often vague indeterminate commonlaw rules established different along interstate waterways pp district correctly denied petitioner motion summary judgment judgment pleadings pp holding leave respondents without remedy since act precludes suits require effluent control standards incompatible established act procedures since act saving clause specifically preserves state actions aggrieved parties bring nuisance claim law source state new york pp act laws courts nothing provisions prevents sitting affected state hearing nuisance suit provided jurisdiction otherwise proper district sitting diversity competent apply law foreign state therefore vermont proper forum case powell delivered opinion rehnquist white scalia joined brennan filed opinion concurring part dissenting part marshall blackmun joined post stevens filed opinion concurring part dissenting part blackmun joined post roy reardon argued cause petitioner briefs albert bader caroline mitchell peter langrock argued cause respondents brief emily joselson jeffrey amestoy attorney general vermont merideth wright assistant attorney general deputy solicitor general wallace argued cause amicus curiae urging affirmance brief solicitor general fried assistant attorney general habicht richard lazarus jacques gelin john cannon susan wanat ann plunkett sheldon filed brief legal foundation amicus curiae urging reversal brief state tennessee et al urging affirmance filed michael cody attorney general john knox walkup chief deputy attorney general frank scanlon deputy attorney general michael pearigen assistant attorney general attorneys general respective follows john van de kamp california joseph lieberman connecticut jim jones idaho neil hartigan illinois thomas miller iowa william webster missouri robert spire nebraska michael turpen oklahoma arlene violet rhode island travis medlock south carolina mark meierhenry south dakota mary sue terry virginia justice powell delivered opinion case involves scope clean water act stat amended et seq cwa act question presented whether act nuisance suit filed vermont vermont law source alleged injury located new york lake champlain forms part border new york vermont petitioner international paper company ipc operates pulp paper mill new york side lake course business ipc discharges variety effluents lake diffusion pipe pipe runs mill water toward vermont ending short distance state boundary line divides lake respondents group property owners reside lease land vermont shore owners filed class action suit ipc claiming inter alia discharge effluents constituted continuing nuisance vermont common law respondents alleged pollutants made water foul unhealthy smelly unfit recreational use thereby diminishing value property app owners asked million compensatory damages million punitive damages injunctive relief require ipc restructure part water treatment system action filed state superior later removed federal district district vermont ipc moved summary judgment judgment pleadings claiming cwa respondents suit parties consent district judge deferred ruling motion pending decision appeals seventh circuit similar case involving illinois city milwaukee dispute illinois filed nuisance action city illinois statutory common law seeking abate alleged pollution lake michigan illinois milwaukee milwaukee iii cert denied appeals ultimately remanded case dismissal illinois claim finding cwa precluded application one state law pollution source located different state decision based part conclusion application different state laws single point source interfere carefully devised regulatory system established cwa also concluded suits alleging violations laws polluting source state ipc argued holding milwaukee iii dispositive case vermont district disagreed denied motion dismiss supp acknowledged federal law normally governs interstate water pollution found however two sections cwa explicitly preserve rights action first act provides except expressly provided nothing chapter shall construed impairing manner affecting right jurisdiction respect waters including boundary waters nothing section shall restrict right person class persons may statute common law seek enforcement effluent standard limitation seek relief district therefore adopted third interpretation saving clause held state action redress interstate water pollution maintained law state injury occurred ibid unpersuaded concern expressed milwaukee iii application law point source conflict cwa said interference procedures established congress state imposition compensatory damage awards equitable relief injuries caused merely supplement standards limitations imposed act emphasis original also found use state law conflict ultimate goal cwa since case objective decrease level pollution ibid district certified decision interlocutory appeal see supp iii appeals second circuit affirmed reasons stated district per curiam granted certiorari resolve circuit conflict important issue federal affirm denial ipc motion dismiss reverse decision extent permits application vermont law litigation hold considers claim concerning interstate water pollution subject cwa must apply law state point source located ii brief review regulatory framework necessary set stage case fairly recently federal common law governed use misuse interstate water see hinderlider la plata river cherry creek ditch water apportionment missouri illinois water pollution principle called question context water pollution suggested dicta interstate dispute state private company resolved reference state nuisance law ohio wyandotte chemicals action otherwise cognizable federal district adjudicated state law citing erie tompkins occasion address issue first two cases involving dispute illinois milwaukee milwaukee state moved leave file original action seeking enjoin city discharging sewage lake michigan illinois milwaukee opinion case affirmed view regulation interstate water pollution matter federal state law thus overruling contrary suggestion wyandotte concerned however existing version act sufficiently comprehensive resolve interstate disputes likely arise milwaukee therefore held cases resolved reference federal common law implicit corollary ruling state common law preempted see milwaukee iii noted though future action congress regulate water pollution might federal common law well congress thereafter adopted comprehensive amendments act considered impact new legislation illinois milwaukee returned several years later milwaukee illinois milwaukee ii noted amendments complete rewriting statute considered milwaukee comprehensive far reaching provisions congress ever passed area citations legislative history omitted consequently held federal legislation occupied field federal common law left open question whether injured parties still cause action state law case remanded consideration result remand decision appeals seventh circuit milwaukee iii discussed supra one primary features amendments establishment national pollutant discharge elimination system npdes federal permit program designed regulate discharge polluting effluents see generally epa california ex rel state water resources control board describing npdes system section act generally prohibits discharge effluent navigable body water unless point source obtained npdes permit environmental protection agency epa permits contain detailed effluent limitations compliance schedule attainment limitations amendments also recognize significant role protecting natural resources act provides federal government may delegate state authority administer npdes program respect point sources located within state epa administrator determines proposed state program complies requirements set forth administrator retains authority however block issuance permit objects even federal government administers permit program source state may require discharge limitations stringent required federal government see cfr federal government may issue npdes permit administrator must obtain certification source state proposed discharge complies state standards standards cwa therefore establishes regulatory partnership federal government source state source strong voice regulating pollution cwa contemplates much lesser role share interstate waterway source affected even though may harmed discharges affected state advisory role regulating pollution originates beyond borders federal permit may issued affected state given notice opportunity object proposed standards public hearing milwaukee iii supra affected state similar rights consulted source state issues permit source state must send notification must consider objections recommendations submitted taking action significantly however affected state authority block issuance permit dissatisfied proposed standards affected state recourse apply epa administrator discretion disapprove permit concludes discharges undue impact interstate waters also affected state may establish separate permit system regulate source see state may establish permit system waters within jurisdiction emphasis added lake erie alliance protection coastal corridor army corps engineers supp wd aff cert denied state champion international cert pending thus act makes clear affected occupy subordinate position source federal regulatory program iii regulatory framework mind turn question presented whether act vermont common law extent law may impose liability new york point source begin analysis noting necessary federal statute provide explicitly particular state laws hillsborough county automated medical laboratories although courts lightly infer may presumed federal legislation sufficiently comprehensive make reasonable inference congress left room supplementary state regulation ibid quoting rice santa fe elevator addition express implied state law also invalid extent actually conflicts federal statute ray atlantic richfield conflict found state law stands obstacle accomplishment execution full purposes objectives congress hillsborough county automated medical laboratories supra quoting hines davidowitz noted milwaukee ii congress intended act amendments establish program water pollution regulation observed congressional views comprehensive nature legislation practically universal citing legislative history examination amendments amply supports views act applies point sources virtually bodies water sets forth procedures obtaining permit great detail cwa also provides remedies including civil criminal fines permit violations citizen suits allow individuals including affected sue injunctions enforce statute light pervasive regulation fact control interstate pollution primarily matter federal law milwaukee clear state suits remain available specifically preserved act although congress intended dominate field pollution regulation saving clause negates inference congress left room state causes action respondents read language saving clause broadly preserve state right regulate waters injured party right seek relief statute common law emphasis added claim language selected portions legislative history compel inference congress intended preserve right bring suit law affected state accept reading act begin plain language provisions respondents rely means compels result seek section merely says othing section provisions shall affect injured party right seek relief state law purport preclude state law provisions act section moreover preserves authority state respect waters including boundary waters stat language arguably limits effect clause discharges flowing directly state waters discharges within state savings clause preclude law affected state given act speak directly issue must guided goals policies act determining whether fact action based law affected state cf city rome powell dissenting resort legislative materials congressional mandate unclear face examining cwa whole purposes history convinced affected allowed impose separate discharge standards single point source inevitable result serious interference achievement full purposes objectives congress see hillsborough county automated medical laboratories supra believe congress intended undermine carefully drawn statute general saving clause conclude cwa precludes applying law affected state source determining whether vermont nuisance law stands obstacle full implementation cwa enough say ultimate goal federal state law eliminate water pollution state law also interferes methods federal statute designed reach goal see michigan canners freezers assn agricultural marketing bargaining case application vermont law ipc allow respondents circumvent npdes permit system thereby upsetting balance public private interests carefully addressed act establishing permit system effluent discharges congress implicitly recognized goal cwa elimination water pollution achieved immediately realized without incurring costs epa administrator issues permits according established effluent standards water quality standards turn based upon available technology competing public industrial uses administrator must consider impact discharges waterway types effluents schedule compliance may vary widely among sources state elects impose standards also must consider technological feasibility stringent controls given nature complex decisions surprising act limits right administer permit system epa source see interpretation saving clause preserved actions brought affected state law disrupt balance interests new york source liable violations vermont law law effectively override permit requirements policy choices made source state affected state nuisance laws subject point source threat legal equitable penalties permit standards less stringent imposed affected state penalties compel source adopt different control standards different compliance schedule approved epa even though affected state engaged weighing costs benefits case illustrates problems rule vermont ruled respondents entitled full amount damages injunctive relief sought complaint minimum ipc change methods business controlling pollution avoid threat ongoing liability suits also require source cease operations ordering immediate abatement critically liabilities attach even though source complied fully state federal permit obligations inevitable result suits vermont indirectly directly regulate conduct sources application affected state law source also undermine important goals efficiency predictability permit system history amendments shows congress intended establish clear identifiable discharge standards see leg hist noted reading saving clause proposed respondents source subject variety commonlaw rules established different along interstate waterways nuisance standards often vague indeterminate application numerous laws exacerbate vagueness resulting uncertainty appeals milwaukee iii identified problem irrational system regulation number different independent plenary regulatory authority single discharge lead chaotic confrontation sovereign dischargers forced meet statutory limitations potentially affected discharges also common law standards developed case law virtually impossible predict standard lawful discharge interstate body water permit issued act rendered meaningless nothing act gives affected state power regulate discharges cwa carefully defines role source affected specifically provides process whereby interests considered balanced source state epa delineation authority represents congress considered judgment best method serving public interest reconciling often competing concerns affected pollution extraordinary congress devising elaborate permit system sets clear standards tolerate suits potential undermine regulatory structure conclusion vermont nuisance law inapplicable new york point source leave respondents without remedy cwa precludes suits may require standards effluent control incompatible established procedures set forth act saving clause specifically preserves state actions therefore nothing act bars aggrieved individuals bringing nuisance claim pursuant law source state terms cwa allows new york impose higher standards point sources milwaukee ii recognized authority may include right impose higher well higher statutory restrictions suggesting may adopt stringent limitations state nuisance law apply dischargers see also committee jones falls sewage system train cwa preserves suits filed source state action brought ipc new york nuisance law frustrate goals cwa suit governed vermont law first application source state law disturb balance among federal interests act specifically allows source impose stricter standards imposition law disrupt regulatory partnership established permit system second restriction suits brought nuisance law prevents source subject indeterminate number potential regulations although new york nuisance law may impose separate standards thus create tension permit system source required look single additional authority whose rules relatively predictable moreover expected take account nuisance laws setting permit requirements ipc asks go one step hold suits also must brought courts petitioner cites little authority justification position find basis holding vermont improper forum simply cause action preempted mean judicial jurisdiction claim affected well act laws courts absence statutory authority contrary rule settled district sitting diversity competent apply law foreign state iv district correctly denied ipc motion summary judgment judgment pleadings nothing act prevents sitting affected state hearing nuisance suit provided jurisdiction otherwise proper district appeals erred however concluding vermont law governs litigation application laws incompatible act delegation authority comprehensive regulation water pollution act state law extent state law applied point source decision appeals affirmed part reversed part case remanded proceedings consistent opinion ordered footnotes complaint also sought monetary injunctive relief air pollution allegedly caused ipc mill app claim decisions illinois milwaukee milwaukee milwaukee illinois milwaukee ii discussed part ii infra point source defined cwa discernible confined discrete conveyance pollutants may discharged see cfr disputed ipc point source within meaning act discussion three interpretations saving clause see note city milwaukee illinois demise federal common law water pollution rev act purports regulate navigable waters term construed expansively cover waters navigable traditional sense see riverside bayview homes defining navigable waters waters cong rec legislative history water pollution control act amendments committee print compiled senate committee public works library congress ser hereinafter leg accord north dakota minnesota cf georgia tennessee copper air pollution see also milwaukee glicksman federal preemption private legal remedies pollution rev note although opinion read distinguishing rather overruling part wyandotte later decision made clear state actions survive milwaukee see milwaukee ii see also glicksman supra milwaukee denied motion file original action ruled illinois maintain action federal district state filed suit illinois district alleging city liable creating public nuisance federal illinois common law complaint also alleged violation state environmental protection act see milwaukee ii supra milwaukee iii detailed description permit system see zener guide federal environmental law one point ipc operating federal npdes permit app draft permit submitted vermont affected state vermont well interested parties objected proposed discharge standards thereafter new york obtained permitting authority administers permit see rice santa fe elevator start assumption historic police powers superseded federal act unless clear manifest purpose congress milwaukee ii see also silkwood see see generally middlesex county sewerage authority national sea clammers discussing elaborate remedial provisions senate report accompanying amendments damages shown remedies addition citizen suit remain available compliance requirements act defense common law action pollution damages leg hist respondents also note reviewing legislative history district found evidence congress intended alter traditional tort law principle party may bring suit state injury occurred see young masci noted milwaukee ii fact language saving clause repeated haec verba provisions vast array environmental legislation indicates reflect considered judgment remedies previously available continue available particular statute interpretation act adopted courts also result allowing affected effectively set discharge standards without consulting source state even though source required act give affected opportunity heard chance comment issuing permit citizen suit provision consistent principles underlying act development clear identifiable requirements requirements provide manageable precise benchmarks performance leg hist see milwaukee ii see also keeton dobbs keeton owen prosser keeton law torts ed perhaps impenetrable jungle entire law surrounds word nuisance possibility source meet number different standards relatively small case since vermont state shares lake champlain new york consider example plant discharges effluents mississippi river source located minnesota theoretically subject nuisance laws nine downstream nothing decision course affects respondents right pursue remedies may provided act also alleged respondents complaint ipc violating terms permit respondents may bring citizen suit compel compliance respondents also opportunity protect interests fact commenting objecting proposed standard see milwaukee ii supra act provides ample opportunity affected protect rights district concluded interference act insignificant part respondents seeking compensated specific harm rather trying regulate ipc supp solicitor general behalf amicus curiae adopts portion view acknowledges suits seeking punitive injunctive relief law interference cause cwa government asserts compensatory damages actions however may brought law state injury occurred solicitor general reasons compensatory damages require source pay external costs created pollution thus regulate way inconsistent act government cites silkwood proposition certain circumstances may find remedies others decline government invitation draw line types relief sought suggestion distinction either act legislative history noted silkwood unless evidence congress meant split particular remedy purposes assumed full cause action state law available case also think unwise treat compensatory damages differently facts case vermont determined respondents entitled requested compensatory relief ipc might compelled adopt different additional means pollution control required act regardless whether purpose relief compensatory regulatory see perez campbell effect rather purpose state statute governs analysis discussed result irreconcilable cwa exclusive grant authority federal government source state cf chicago north western transportation kalo brick tile although conclude new york law generally controls suit note scope cwa necessarily includes laws inconsistent full purposes objectives congress see hillsborough county automated medical laboratories therefore agree dissent vermont nuisance law still may apply new york doctrine dictates result post discussed supra application law frustrate carefully prescribed cwa regulatory system interference occur course whether law applies original matter whether applies pursuant source state principles therefore extent law source state requires application substantive law particular issue well cf citizen suit enforce permit must brought judicial district source located justice brennan justice marshall justice blackmun join concurring part dissenting part concur wholeheartedly judgment clean water act act et private nuisance suit filed vermont source alleged injury located new york disagree view vermont must apply new york nuisance law question presented whether district properly denied international paper company motion dismiss concludes federal district sitting state injury occurred may hear nuisance suit redress interstate water pollution district must apply law state point source located improperly reaches decide latter issue far parties know vermont law new york law identical question private nuisance tr oral arg moreover vermont state share lake champlain new york thus nuisance laws new york vermont sole candidates application present case conflict respondents base claims particular state law complaint matter specify jurisdiction common law invokes make choice law plaintiffs supplemental memorandum law opposition defendant motion dismiss given facts find necessary affirm denial international paper company motion dismiss ii even reach issue state law applicable case interpret act require sitting state injury occurred affected state apply nuisance law state pollution emanates source state nothing act usual analysis undertaken federal district courts determine state tort law applied interstate tort suits first district must apply rules state sits see day zimmerman challoner klaxon stentor electric mfg holding erie doctrine applies rules thus vermont district apply rules vermont affected state second principles must interpreted district determine whether tort law source state affected state applied today finds application vermont nuisance law even vermont rules determine vermont tort law applied act provides support deviation principles rules affected state nuisance law may applied purpose tort law ensure compensation tort victims beyond dispute affected significant interest redressing injuries actually occur within state keeton hustler magazine see also allstate ins hague huron portland cement detroit traditional interest affected state involving health safety citizens protected providing application affected state tort laws suits source state polluters see askew american waterways operators watson employers liability assurance young masci state interest applying tort laws superseded federal act unless clear manifest purpose congress see silkwood milwaukee illinois milwaukee ii congress preserved rights source affected alike enforce state claims section provides except expressly provided nothing chapter shall construed impairing manner affecting right jurisdiction respect waters including boundary waters emphasis added preserving right seek traditional relief act draws distinction interstate intrastate disputes nothing section shall restrict right person class persons may statute common law seek enforcement effluent standard limitation seek relief provision contains express restriction normal operation state law reflecting act policy recognize preserve protect primary responsibilities rights prevent reduce eliminate pollution contrast congress wanted affect state rights expressly stated intent act congress chose state law situation warranted based upon urgent need uniformity section relating marine sanitation devices legislative history water pollution control act committee print compiled senate committee public works library congress ser hereinafter leg find act plain language clearly indicates congress wanted leave intact traditional right affected state apply tort law residents injured polluter iii argues although act explicitly state affected laws applying law affected state source stands obstacle full implementation act contends application affected state common law contrary subsidiary objectives act establishing right source set effluent standards polluters ante establishing clear identifiable discharge standards ante concludes affected state common law implication conflicts although plausibly argues offering better administrative approach believe congress meant alter state law manner threshold matter opinion assumes enacting act congress valued administrative efficiency highly effective elimination water pollution yet evidence congress ever made choice instead act reflects congress judgment rational permit system operating tandem existing state controls best achieve act primary goal controlling water pollution base conclusion four important considerations first since congress preserved state rights xcept expressly provided supra reliance upon implication justify conclusion cf silkwood supra congress assumed traditional principles state tort law apply full force unless expressly supplanted second legislative history act indicates congress saw peril act permitting application traditional principles state law senate committee report noted congress meant specifically preserve rights remedies law thus damages shown remedies remain available compliance requirements act defense common law action pollution damages leg hist emphasis added majority concern tort liability might undercut permit requirements thus shared congress addition environmental protection agency epa interpretation consistent congress view state tort remedies supplemental wholly preserved act regulations promulgated epa recognize meeting source state minimum effluent limits convey exclusive privilege cfr epa interpret act modify state local law issuance permit authorize injury persons property invasion private rights infringement state local law regulations third refused state law even contrary subsidiary objectives concerning administration state law furthers federal statute primary purpose consistent act saving authority area traditionally regulated see pacific gas electric energy resources conservation development subjecting polluters state liability simultaneously promotes main federal goal eliminating water pollution entirely obeys congressional command leave state common law intact congress intended stand federal regulatory scheme state traditional liability laws tolerate whatever tension silkwood given statutory scheme congress rethink division regulatory authority light possible exercise undercut federal objective courts assume role system assigns congress pacific gas electric energy resources conservation development supra finally overstates conflict affected state nuisance law subsidiary objectives act contends applying affected state law violate source state right set effluent standards polluters traditional rules require application affected state nuisance law conflict source state ability set minimum standards required act congress considered state rights supplementary conflict act unless embodied less stringent standard polluters federal effluent standards see pp leg hist application affected state remedies polluter conflict act possible polluter redress injuries suffered victims pollution obey source state effluent standards complying stringent requirement either act affected state law polluter necessarily complies lenient standards see silkwood supra also argues application affected state law source undermine important goals efficiency predictability permit system congress set establish clear identifiable discharge standards leg hist intend reform impenetrable jungle state nuisance law see ante legislative history epa regulations indicate compliance effluent standards defense state tort suits see ante affected state nuisance law vague indeterminate source state nuisance law fact instant case vermont new york nuisance law apparently identical see supra congress intended impose identifiable federal discharge standards upon polluters must much explicit evidence assuming enacting provision congress meant revolutionize state tort law principles iv even conclusion new york law apply correct logically follow new york nuisance law must applied case haste reach result assumes imposition new york nuisance standard required new york law suit alleged injury occurred vermont act specifically allows source impose stricter standards imposition law disrupt regulatory partnership established permit system new york nuisance law may impose separate standards ante emphasis added whether new york law requires application new york vermont nuisance law depends interpretation new york law pertaining conflict laws state freedom adopt rules conflict laws adopt rules law conflict laws rules adopted become definitely part law branch state law restatement second conflict laws comment reasons source state must primary role regulating pollution discharges logic nothing prevents source state legislature courts choosing impose principles affected state nuisance law case source state free adopt affected state standards standards ante noting source state accept advice affected state district correctly denied petitioner motion summary judgment judgment pleadings reasons indicated affirm without reaching question state law applicable case adopted two different approaches determine state tort law applied traditional rule lex loci delicti requires application tort law jurisdiction injury occurred see jur conflict laws scoles hay conflict law pp rationale traditional rule affected state possesses strong interest redressing injuries citizens modern rule followed majority employs approach see allstate ins hague analysis primary purpose tort rule control tortfeasor conduct setting pollution discharge standards source state tort law may applied alternatively main purpose tort rule compensating victims tort may apply affected state tort law relevant considerations include locations parties relationship parties centered see restatement second conflict laws comment pp dismisses importance section merely says othing section provisions shall affect injured party right seek relief state law purport preclude state law provisions act ante congress used language section act expressly implicates private suits congress reemphasizing state authority private suits involving state common law affected act respondents contend new york vermont principles vermont common law apply action brief respondents petitioner contest view issue need determined view remanded appeals see allstate ins hague day zimmerman challoner blackmun concurring klaxon stentor electric mfg sufficient sake argument note several cases suggest new york principles may require vermont law applied instance see bing halstead supp sdny tortious conduct occurs one jurisdiction injury another case law place injury applies consins instrument flyers true lex loci delicti remains general rule tort cases displaced extraordinary circumstances justice stevens justice blackmun joins concurring part dissenting part affirming denial international paper company motion dismiss concludes nothing clean water act et deprives federal district diversity jurisdiction otherwise entertain nuisance suit brought point source located another state based injury allegedly suffered forum state agree holding find sufficient decide case however goes ventures opinion whether district must apply substantive law state source water pollution located perhaps responding district observation affirmed appeals clean water act authorizes actions redress injury caused water pollution interstate waters common law state injury occurred supp since district yet asked decide decided substantive law govern particular suit dispute parties issue business discussing stage litigation rush express opinion substantive law source state must govern broadly asserts act preempts state law extent state law applied point source ante record even know whether vermont state law including rules look new york law nuisance govern nuisance suit based alleged source new york opinion thus partially advisory three reasons question applicable state law addresses yet arisen litigation arise district may well conclude vermont rules require apply new york substantive law justice brennan points ante reason believe difference relevant new york vermont law event one help wonder happened respected doctrine judicial restraint sit edit opinions lower courts see phillips petroleum shutts stevens concurring part dissenting part also sit draft advisory opinions possible future guidance courts therefore respectfully dissent part opinion holding clean water act requires district apply nuisance law source state