Task: sc_issue_8

What follows is an opinion from the Supreme Court of the United States. Your task is to determine the issue of the Court's decision. Determine the issue of the case on the basis of the Court's own statements as to what the case is about. Focus on the subject matter of the controversy rather than its legal basis.

Justice Ginsburg
delivered the opinion of the Court.
The Court granted review in this case limited to a single question: Under the Clean Water Act (CWA), 86 Stat. 816, as amended, 33 U. S. C. § 1251 et seq., does the flow of water out of a concrete channel within a river rank as a “discharge of a pollutant”? In this Court, the parties and the United States as amicus curiae agree that the answer to this question is “no.” They base this accord on South Fla. Water Management Dist. v. Miccosukee Tribe, 541 U. S. 95, 109-112 (2004), in which we accepted that pumping polluted water from one part of a water body into another part of the same body is not a discharge of pollutants under the CWA. Adhering to the view we took in Miccosukee, we hold that the parties correctly answered the sole question presented in the negative. The decision in this suit rendered by the Court of Appeals for the Ninth Circuit is inconsistent with our determination. We therefore reverse that court’s judgment.
Petitioner Los Angeles County Flood Control District (District) operates a “municipal separate storm sewer system” (MS4)—a drainage system that collects, transports, and discharges storm water. See 40 CFR § 122.26(b)(8) (2012). See also § 122.26(b)(13) (“Storm water means storm water runoff, snow melt runoff, and surface runoff and drainage.”). Because storm water is often heavily polluted, see 64 Fed. Reg. 68724-68727 (1999), the CWA and its implementing regulations require the operator of an MS4 serving a population of at least 100,000 to obtain a National Pollutant Discharge Elimination System (NPDES) permit before discharging storm water into navigable waters. See 33 U. S. C. §§ 1311(a), 1342(p)(2)(C), and (D); 40 CFR §§ 122.26(a)(3), (b)(4), (b)(7). The District first obtained an NPDES permit for its MS4 in 1990; thereafter, the permit was several times renewed. Natural Resources Defense Council, Inc. v. County of Los Angeles, 673 F. 3d 880, 886 (CA9 2011).
Respondents Natural Resources Defense Council, Inc. (NRDC) and Santa Monica Baykeeper (Baykeeper) filed a citizen suit against the District and several other defendants under §605 of the CWA, 33 U. S. C. § 1365. They alleged, among other things, that water-quality measurements from monitoring stations located within the Los Angeles and San Gabriel Rivers demonstrated that the District was violating the terms of its permit.
The District Court granted summary judgment to the District on these claims. It was undisputed, the District Court acknowledged, that “data from the Los Angeles River and San Gabriel River [monitoring] stations indicate [d] that water quality standards ha[d] repeatedly been exceeded for a number of pollutants, including aluminum, copper, cyanide, fecal coliform bacteria, and zinc.” App. to Pet. for Cert. 108. But numerous entities other than the District, the court added, discharge into the rivers upstream of the monitoring stations. See id., at 115-116. See also 673 F. 3d, at 889 (observing that the pollutants of “thousands of permitted dischargers” reach the rivers). The record was insufficient, the District Court concluded, to warrant a finding that the District’s MS4 had discharged storm water containing the standards-exceeding pollutants detected at the downstream monitoring stations.
The Ninth Circuit reversed in relevant part. The monitoring stations for the Los Angeles and San Gabriel Rivers, the Court of Appeals said, are located in “concrete channels” constructed for flood-control purposes. Id., at 900. See also id., at 889 (describing the monitoring stations’ location). Based on this impression, the Court of Appeals held that a discharge of pollutants occurred under the CWA when the polluted water detected at the monitoring stations “flowed out of the concrete channels” and entered downstream portions of the waterways lacking concrete linings. Id., at 900. Because the District exercises control over the concrete-lined portions of the rivers, the Court of Appeals held, the District is liable for the discharges that, in the appellate court’s view, occur when water exits those concrete channels. See id., at 899-901.
We granted certiorari on the following question: Under the CWA, does a “discharge of pollutants” occur when polluted water “flows from one portion of a river that is navigable water of the United States, through a concrete channel or other engineered improvement in the river,” and then “into a lower portion of the same river?” Pet. for Cert. i. See 567 U. S. 933 (2012). As noted above, see supra, at 80, the parties, as well as the United States as amicus curiae, agree that the answer to this question is “no.”
That agreement is hardly surprising, for we held in Miccosukee that the transfer of polluted water between “two parts of the same water body” does not constitute a discharge of pollutants under the CWA. 541 U. S., at 109-112. We derived that determination from the CWA’s text, which defines the term “discharge of a pollutant” to mean “any addition of any pollutant to navigable waters from any point source.” 33 U. S. C. § 1362(12) (emphasis added). Under a common understanding of the meaning of the word “add,” no pollutants are “added” to a water body when water is merely transferred between different portions of that water body. See Webster’s Third New International Dictionary 24 (2002) (“add” means “to join, annex, or unite (as one thing to another) so as to bring about an increase (as in number, size, or importance) or so as to form one aggregate”). “As the Second Circuit [aptly] put it ... , *[i]f one takes a ladle of soup from a pot, lifts it above the pot, and pours it back into the pot, one has not “added” soup or anything else to the pot.’” Miccosukee, 541 U. S., at 109-110 (quoting Catskill Mountains Chapter of Trout Unlimited, Inc. v. New York, 273 F. 3d 481, 492 (CA2 2001)).
In Miccosukee, polluted water was removed from a canal, transported through a pump station, and then deposited into a nearby reservoir. 541 U. S., at 100. We held that this water transfer would count as a discharge of pollutants under the CWA only if the canal and the reservoir were “meaningfully distinct water bodies.” Id., at 112. It follows, a fortiori, from Miccosukee that no discharge of pollutants occurs when water, rather than being removed and then returned to a water body, simply flows from one portion of the water body to another. We hold, therefore, that the flow of water from an improved portion of a navigable waterway into an unimproved portion of the very same waterway does not qualify as a discharge of pollutants under the CWA. Because the decision below cannot be squared with that holding, the Court of Appeals’ judgment must be reversed.
The NRDC and Baykeeper urge that the Court of Appeals reached the right result, albeit for the wrong reason. The monitoring system proposed by the District and written into its permit showed numerous instances in which water-quality standards were exceeded. Under the permit’s terms, the NRDC and Baykeeper maintain, the exceedances detected at the instream monitoring stations are by themselves sufficient to establish the District’s liability under the CWA for its upstream discharges. See Brief for Respondents 33-62. This argument failed below. See 673 F. 3d, at 898, 901; App. to Pet. for Cert. 100-102. It is not embraced within, or even touched by, the narrow question on which we granted certiorari. We therefore do not address, and indicate no opinion on, the issue the NRDC and Baykeeper seek to substitute for the question we took up for review.
* * *
For the reasons stated, the judgment of the Court of Appeals for the Ninth Circuit is reversed, and the case is remanded.
It is so ordered.
Justice Alito concurs in the judgment.
The NRDC, Baykeeper, and the United States contend—contrary to the District—that the Court of Appeals understood that no discharge of pollutants occurs when water flows from an improved into an unimproved portion of a navigable waterway. They suggest that the Court of Appeals misperceived the facts, erroneously believing that the monitoring stations for the Los Angeles and San Gabriel Rivers “were sampling water from a portion of the MS4 that was distinct from the rivers themselves and from which discharges through an outfall to the rivers subsequently occurred.” Brief for United States as Amicus Curiae 18. See also Brief for Respondents 30-31 (“The court of appeals’ statements suggest it believed the monitoring stations sampled polluted stormwater from the District’s MS4 before, not after, discharge to the Los Angeles and San Gabriel Rivers.”). Whatever the source of the Court of Appeals’ error, all parties agree that the court’s analysis was erroneous.
Shortly before oral argument in this case, a renewed permit was approved for the District’s MS4. Unlike the District’s prior permit, which required only instream monitoring, the renewed permit requires end-of-pipe monitoring at individual MS4 discharge points. See id., at 20-21; Reply Brief 5, n. 2.

Question: What is the issue of the decision?
年. involuntary confession
数. habeas corpus
日. plea bargaining: the constitutionality of and/or the circumstances of its exercise
的. retroactivity (of newly announced or newly enacted constitutional or statutory rights)
月. search and seizure (other than as pertains to vehicles or Crime Control Act)
用. search and seizure, vehicles
成. search and seizure, Crime Control Act
名. contempt of court or congress
时. self-incrimination (other than as pertains to Miranda or immunity from prosecution)
件. Miranda warnings
一. self-incrimination, immunity from prosecution
请. right to counsel (cf. indigents appointment of counsel or inadequate representation)
中. cruel and unusual punishment, death penalty (cf. extra legal jury influence, death penalty)
据. cruel and unusual punishment, non-death penalty (cf. liability, civil rights acts)
码. line-up
不. discovery and inspection (in the context of criminal litigation only, otherwise Freedom of Information Act and related federal or state statutes or regulations)
新. double jeopardy
文. ex post facto (state)
下. extra-legal jury influences: miscellaneous
分. extra-legal jury influences: prejudicial statements or evidence
入. extra-legal jury influences: contact with jurors outside courtroom
人. extra-legal jury influences: jury instructions (not necessarily in criminal cases)
功. extra-legal jury influences: voir dire (not necessarily a criminal case)
上. extra-legal jury influences: prison garb or appearance
户. extra-legal jury influences: jurors and death penalty (cf. cruel and unusual punishment)
为. extra-legal jury influences: pretrial publicity
间. confrontation (right to confront accuser, call and cross-examine witnesses)
号. subconstitutional fair procedure: confession of error
取. subconstitutional fair procedure: conspiracy (cf. Federal Rules of Criminal Procedure: conspiracy)
回. subconstitutional fair procedure: entrapment
在. subconstitutional fair procedure: exhaustion of remedies
页. subconstitutional fair procedure: fugitive from justice
字. subconstitutional fair procedure: presentation, admissibility, or sufficiency of evidence (not necessarily a criminal case)
有. subconstitutional fair procedure: stay of execution
个. subconstitutional fair procedure: timeliness
作. subconstitutional fair procedure: miscellaneous
示. Federal Rules of Criminal Procedure
出. statutory construction of criminal laws: assault
是. statutory construction of criminal laws: bank robbery
失. statutory construction of criminal laws: conspiracy (cf. subconstitutional fair procedure: conspiracy)
表. statutory construction of criminal laws: escape from custody
除. statutory construction of criminal laws: false statements (cf. statutory construction of criminal laws: perjury)
加. statutory construction of criminal laws: financial (other than in fraud or internal revenue)
败. statutory construction of criminal laws: firearms
生. statutory construction of criminal laws: fraud
信. statutory construction of criminal laws: gambling
类. statutory construction of criminal laws: Hobbs Act; i.e., 18 USC 1951
置. statutory construction of criminal laws: immigration (cf. immigration and naturalization)
理. statutory construction of criminal laws: internal revenue (cf. Federal Taxation)
本. statutory construction of criminal laws: Mann Act and related statutes
息. statutory construction of criminal laws: narcotics includes regulation and prohibition of alcohol
行. statutory construction of criminal laws: obstruction of justice
定. statutory construction of criminal laws: perjury (other than as pertains to statutory construction of criminal laws: false statements)
改. statutory construction of criminal laws: Travel Act, 18 USC 1952
市. statutory construction of criminal laws: war crimes
期. statutory construction of criminal laws: sentencing guidelines
以. statutory construction of criminal laws: miscellaneous
修. jury trial (right to, as distinct from extra-legal jury influences)
元. speedy trial
方. miscellaneous criminal procedure (cf. due process, prisoners' rights, comity: criminal procedure)
录. voting
区. Voting Rights Act of 1965, plus amendments
单. ballot access (of candidates and political parties)
位. desegregation (other than as pertains to school desegregation, employment discrimination, and affirmative action)
型. desegregation, schools
法. employment discrimination: on basis of race, age, religion, illegitimacy, national origin, or working conditions.
县. affirmative action
存. slavery or indenture
品. sit-in demonstrations (protests against racial discrimination in places of public accommodation)
前. reapportionment: other than plans governed by the Voting Rights Act
称. debtors' rights
注. deportation (cf. immigration and naturalization)
值. employability of aliens (cf. immigration and naturalization)
输. sex discrimination (excluding sex discrimination in employment)
建. sex discrimination in employment (cf. sex discrimination)
能. Indians (other than pertains to state jurisdiction over)
大. Indians, state jurisdiction over
例. juveniles (cf. rights of illegitimates)
度. poverty law, constitutional
始. poverty law, statutory: welfare benefits, typically under some Social Security Act provision.
到. illegitimates, rights of (cf. juveniles): typically inheritance and survivor's benefits, and paternity suits
面. handicapped, rights of: under Rehabilitation, Americans with Disabilities Act, and related statutes
载. residency requirements: durational, plus discrimination against nonresidents
点. military: draftee, or person subject to induction
密. military: active duty
动. military: veteran
果. immigration and naturalization: permanent residence
图. immigration and naturalization: citizenship
提. immigration and naturalization: loss of citizenship, denaturalization
发. immigration and naturalization: access to public education
式. immigration and naturalization: welfare benefits
国. immigration and naturalization: miscellaneous
登. indigents: appointment of counsel (cf. right to counsel)
错. indigents: inadequate representation by counsel (cf. right to counsel)
者. indigents: payment of fine
认. indigents: costs or filing fees
误. indigents: U.S. Supreme Court docketing fee
接. indigents: transcript
关. indigents: assistance of psychiatrist
重. indigents: miscellaneous
第. liability, civil rights acts (cf. liability, governmental and liability, nongovernmental; cruel and unusual punishment, non-death penalty)
地. miscellaneous civil rights (cf. comity: civil rights)
如. First Amendment, miscellaneous (cf. comity: First Amendment)
设. commercial speech, excluding attorneys
目. libel, defamation: defamation of public officials and public and private persons
开. libel, privacy: true and false light invasions of privacy
事. legislative investigations: concerning internal security only
可. federal or state internal security legislation: Smith, Internal Security, and related federal statutes
要. loyalty oath or non-Communist affidavit (other than bar applicants, government employees, political party, or teacher)
代. loyalty oath: bar applicants (cf. admission to bar, state or federal or U.S. Supreme Court)
小. loyalty oath: government employees
选. loyalty oath: political party
标. loyalty oath: teachers
明. security risks: denial of benefits or dismissal of employees for reasons other than failure to meet loyalty oath requirements
编. conscientious objectors (cf. military draftee or military active duty) to military service
求. campaign spending (cf. governmental corruption):
列. protest demonstrations (other than as pertains to sit-in demonstrations): demonstrations and other forms of protest based on First Amendment guarantees
网. free exercise of religion
万. establishment of religion (other than as pertains to parochiaid:)
最. parochiaid: government aid to religious schools, or religious requirements in public schools
器. obscenity, state (cf. comity: privacy): including the regulation of sexually explicit material under the 21st Amendment
所. obscenity, federal
内. due process: miscellaneous (cf. loyalty oath), the residual code
体. due process: hearing or notice (other than as pertains to government employees or prisoners' rights)
通. due process: hearing, government employees
务. due process: prisoners' rights and defendants' rights
此. due process: impartial decision maker
商. due process: jurisdiction (jurisdiction over non-resident litigants)
序. due process: takings clause, or other non-constitutional governmental taking of property
化. privacy (cf. libel, comity: privacy)
消. abortion: including contraceptives
否. right to die
保. Freedom of Information Act and related federal or state statutes or regulations
使. attorneys' and governmental employees' or officials' fees or compensation or licenses
次. commercial speech, attorneys (cf. commercial speech)
机. admission to a state or federal bar, disbarment, and attorney discipline (cf. loyalty oath: bar applicants)
对. admission to, or disbarment from, Bar of the U.S. Supreme Court
量. arbitration (in the context of labor-management or employer-employee relations) (cf. arbitration)
查. union antitrust: legality of anticompetitive union activity
部. union or closed shop: includes agency shop litigation
性. Fair Labor Standards Act
和. Occupational Safety and Health Act
更. union-union member dispute (except as pertains to union or closed shop)
后. labor-management disputes: bargaining
证. labor-management disputes: employee discharge
题. labor-management disputes: distribution of union literature
确. labor-management disputes: representative election
格. labor-management disputes: antistrike injunction
了. labor-management disputes: jurisdictional dispute
于. labor-management disputes: right to organize
金. labor-management disputes: picketing
公. labor-management disputes: secondary activity
午. labor-management disputes: no-strike clause
円. labor-management disputes: union representatives
片. labor-management disputes: union trust funds (cf. ERISA)
空. labor-management disputes: working conditions
态. labor-management disputes: miscellaneous dispute
管. miscellaneous union
主. antitrust (except in the context of mergers and union antitrust)
天. mergers
自. bankruptcy (except in the context of priority of federal fiscal claims)
我. sufficiency of evidence: typically in the context of a jury's determination of compensation for injury or death
全. election of remedies: legal remedies available to injured persons or things
今. liability, governmental: tort or contract actions by or against government or governmental officials other than defense of criminal actions brought under a civil rights action.
来. liability, other than as in sufficiency of evidence, election of remedies, punitive damages
正. liability, punitive damages
说. Employee Retirement Income Security Act (cf. union trust funds)
意. state or local government tax
送. state and territorial land claims
容. state or local government regulation, especially of business (cf. federal pre-emption of state court jurisdiction, federal pre-emption of state legislation or regulation)
已. federal or state regulation of securities
结. natural resources - environmental protection (cf. national supremacy: natural resources, national supremacy: pollution)
会. corruption, governmental or governmental regulation of other than as in campaign spending
段. zoning: constitutionality of such ordinances, or restrictions on owners' or lessors' use of real property
计. arbitration (other than as pertains to labor-management or employer-employee relations (cf. union arbitration)
源. federal or state consumer protection: typically under the Truth in Lending; Food, Drug and Cosmetic; and Consumer Protection Credit Acts
色. patents and copyrights: patent
時. patents and copyrights: copyright
交. patents and copyrights: trademark
系. patents and copyrights: patentability of computer processes
过. federal or state regulation of transportation regulation: railroad
电. federal and some few state regulations of transportation regulation: boat
询. federal and some few state regulation of transportation regulation:truck, or motor carrier
符. federal and some few state regulation of transportation regulation: pipeline (cf. federal public utilities regulation: gas pipeline)
未. federal and some few state regulation of transportation regulation: airline
程. federal and some few state regulation of public utilities regulation: electric power
常. federal and some few state regulation of public utilities regulation: nuclear power
条. federal and some few state regulation of public utilities regulation: oil producer
当. federal and some few state regulation of public utilities regulation: gas producer
情. federal and some few state regulation of public utilities regulation: gas pipeline (cf. federal transportation regulation: pipeline)
口. federal and some few state regulation of public utilities regulation: radio and television (cf. cable television)
合. federal and some few state regulation of public utilities regulation: cable television (cf. radio and television)
车. federal and some few state regulations of public utilities regulation: telephone or telegraph company
实. miscellaneous economic regulation
组. comity: civil rights
版. comity: criminal procedure
周. comity: First Amendment
址. comity: habeas corpus
记. comity: military
二. comity: obscenity
同. comity: privacy
业. comity: miscellaneous
权. comity primarily removal cases, civil procedure (cf. comity, criminal and First Amendment); deference to foreign judicial tribunals
其. assessment of costs or damages: as part of a court order
进. Federal Rules of Civil Procedure including Supreme Court Rules, application of the Federal Rules of Evidence, Federal Rules of Appellate Procedure in civil litigation, Circuit Court Rules, and state rules and admiralty rules
试. judicial review of administrative agency's or administrative official's actions and procedures
验. mootness (cf. standing to sue: live dispute)
料. venue
传. no merits: writ improvidently granted
述. no merits: dismissed or affirmed for want of a substantial or properly presented federal question, or a nonsuit
集. no merits: dismissed or affirmed for want of jurisdiction (cf. judicial administration: Supreme Court jurisdiction or authority on appeal from federal district courts or courts of appeals)
多. no merits: adequate non-federal grounds for decision
无. no merits: remand to determine basis of state or federal court decision (cf. judicial administration: state law)
员. no merits: miscellaneous
报. standing to sue: adversary parties
他. standing to sue: direct injury
無. standing to sue: legal injury
服. standing to sue: personal injury
线. standing to sue: justiciable question
这. standing to sue: live dispute
制. standing to sue: parens patriae standing
将. standing to sue: statutory standing
处. standing to sue: private or implied cause of action
高. standing to sue: taxpayer's suit
子. standing to sue: miscellaneous
道. judicial administration: jurisdiction or authority of federal district courts or territorial courts
章. judicial administration: jurisdiction or authority of federal courts of appeals
手. judicial administration: Supreme Court jurisdiction or authority on appeal or writ of error, from federal district courts or courts of appeals (cf. 753)
库. judicial administration: Supreme Court jurisdiction or authority on appeal or writ of error, from highest state court
三. judicial administration: jurisdiction or authority of the Court of Claims
从. judicial administration: Supreme Court's original jurisdiction
支. judicial administration: review of non-final order
家. judicial administration: change in state law (cf. no merits: remand to determine basis of state court decision)
长. judicial administration: federal question (cf. no merits: dismissed for want of a substantial or properly presented federal question)
付. judicial administration: ancillary or pendent jurisdiction
秒. judicial administration: extraordinary relief (e.g., mandamus, injunction)
路. judicial administration: certification (cf. objection to reason for denial of certiorari or appeal)
完. judicial administration: resolution of circuit conflict, or conflict between or among other courts
象. judicial administration: objection to reason for denial of certiorari or appeal
则. judicial administration: collateral estoppel or res judicata
现. judicial administration: interpleader
京. judicial administration: untimely filing
转. judicial administration: Act of State doctrine
辑. judicial administration: miscellaneous
限. Supreme Court's certiorari, writ of error, or appeals jurisdiction
力. miscellaneous judicial power, especially diversity jurisdiction
学. federal-state ownership dispute (cf. Submerged Lands Act)
外. federal pre-emption of state court jurisdiction
调. federal pre-emption of state legislation or regulation. cf. state regulation of business. rarely involves union activity. Does not involve constitutional interpretation unless the Court says it does.
项. Submerged Lands Act (cf. federal-state ownership dispute)
北. national supremacy: commodities
工. national supremacy: intergovernmental tax immunity
笑. national supremacy: marital and family relationships and property, including obligation of child support
监. national supremacy: natural resources (cf. natural resources - environmental protection)
任. national supremacy: pollution, air or water (cf. natural resources - environmental protection)
相. national supremacy: public utilities (cf. federal public utilities regulation)
微. national supremacy: state tax (cf. state tax)
册. national supremacy: miscellaneous
联. miscellaneous federalism
平. boundary dispute between states
增. non-real property dispute between states
听. miscellaneous interstate relations conflict
解. incorporation of foreign territories
等. federal taxation, typically under provisions of the Internal Revenue Code
得. federal taxation of gifts, personal, business, or professional expenses
收. priority of federal fiscal claims: over those of the states or private entities
安. miscellaneous federal taxation (cf. national supremacy: state tax)
价. legislative veto
藏. executive authority vis-a-vis congress or the states
命. miscellaneous
应. real property
看. personal property
索. contracts
资. evidence
产. civil procedure
串. torts
布. wills and trusts
原. commercial transactions
Answer:

Answer: 结