CERTIORARI TO THE COURT OF APPEAL OF CALIFORNIA, FOURTH APPELLATE DISTRICT.
White, J., delivered the opinion of the Court, in which Rehnquist, C. J., and Blackmun, Stevens, O'connor, and Scalia, JJ., joined. Brennan, J., filed a dissenting opinion, in which Marshall, J., joined, post, p. 45. Kennedy, J., took no part in the consideration or decision of the case.
JUSTICE WHITE delivered the opinion of the Court.
The issue here is whether the Fourth Amendment prohibits the warrantless search and seizure of garbage left for collection outside the curtilage of a home. We conclude, in accordance with the vast majority of lower courts that have addressed the issue, that it does not.
In early 1984, Investigator Jenny Stracner of the Laguna Beach Police Department received information indicating that respondent Greenwood might be engaged in narcotics trafficking. Stracner learned that a criminal suspect had informed a federal drug enforcement agent in February 1984 that a truck filled with illegal drugs was en route to the Laguna Beach address at which Greenwood resided. In addition, a neighbor complained of heavy vehicular traffic late at night in front of Greenwood's single-family home. The neighbor reported that the vehicles remained at Greenwood's house for only a few minutes.
Stracner sought to investigate this information by conducting a surveillance of Greenwood's home. She observed several vehicles make brief stops at the house during the late-night and early morning hours, and she followed a truck from the house to a residence that had previously been under investigation as a narcotics-trafficking location.
On April 6, 1984, Stracner asked the neighborhood's regular trash collector to pick up the plastic garbage bags that Greenwood had left on the curb in front of his house and to turn the bags over to her without mixing their contents with garbage from other houses. The trash collector cleaned his truck bin of other refuse, collected the garbage bags from the street in front of Greenwood's house, and turned the bags over to Stracner. The officer searched through the rubbish
and found items indicative of narcotics use. She recited the information that she had gleaned from the trash search in an affidavit in support of a warrant to search Greenwood's home.
Police officers encountered both respondents at the house later that day when they arrived to execute the warrant. The police discovered quantities of cocaine and hashish during their search of the house. Respondents were arrested on felony narcotics charges. They subsequently posted bail.
The police continued to receive reports of many late-night visitors to the Greenwood house. On May 4, Investigator Robert Rahaeuser obtained Greenwood's garbage from the regular trash collector in the same manner as had Stracner. The garbage again contained evidence of narcotics use.
Rahaeuser secured another search warrant for Greenwood's home based on the information from the second trash search. The police found more narcotics and evidence of narcotics trafficking when they executed the warrant. Greenwood was again arrested.
The Superior Court dismissed the charges against respondents on the authority of People v. Krivda, 5 Cal. 3d 357, 486 P. 2d 1262 (1971), which held that warrantless trash searches violate the Fourth Amendment and the California Constitution. The court found that the police would not have had probable cause to search the Greenwood home without the evidence obtained from the trash searches.
The Court of Appeal affirmed. 182 Cal. App. 3d 729, 227 Cal. Rptr. 539 (1986). The court noted at the outset that the fruits of warrantless trash searches could no longer be suppressed if Krivda were based only on the California Constitution, because since 1982 the State has barred the suppression of evidence seized in violation of California law but not federal law. See Cal. Const., Art. I, § 28(d); In re Lance W., 37 Cal. 3d 873, 694 P. 2d 744 (1985). But Krivda, a decision binding on the Court of Appeal, also held that the fruits of warrantless trash searches were to be excluded under federal
law. Hence, the Superior Court was correct in dismissing the charges against respondents. 182 Cal. App. 3d, at 735, 227 Cal. Rptr, at 542.*fn1
The California Supreme Court denied the State's petition for review of the Court of Appeal's decision. We granted certiorari, 483 U.S. 1019, and now reverse.
The warrantless search and seizure of the garbage bags left at the curb outside the Greenwood house would violate the Fourth Amendment only if respondents manifested a subjective expectation of privacy in their garbage that society accepts as objectively reasonable. O'Connor v. Ortega, 480 U.S. 709, 715 (1987); California v. Ciraolo, 476 U.S. 207, 211 (1986); Oliver v. United States, 466 U.S. 170, 177 (1984); Katz v. United States, 389 U.S. 347, 361 (1967) (Harlan, J., concurring). Respondents do not disagree with this standard.
They assert, however, that they had, and exhibited, an expectation of privacy with respect to the trash that was searched by the police: The trash, which was placed on the street for collection at a fixed time, was contained in opaque plastic bags, which the garbage collector was expected to pick up, mingle with the trash of others, and deposit at the garbage dump. The trash was only temporarily on the street, and there was little likelihood that it would be inspected by anyone.
It may well be that respondents did not expect that the contents of their garbage bags would become known to the police or other members of the public. An expectation of privacy does not give rise to Fourth Amendment protection,
however, unless society is prepared to accept that expectation as objectively reasonable.
Here, we conclude that respondents exposed their garbage to the public sufficiently to defeat their claim to Fourth Amendment protection. It is common knowledge that plastic garbage bags left on or at the side of a public street are readily accessible to animals,*fn2 children, scavengers,*fn3 snoops,*fn4 and other members of the public. See Krivda, supra, at 367, 486 P. 2d, at 1269. Moreover, respondents placed their refuse at the curb for the express purpose of conveying it to a third party, the trash collector, who might himself have sorted through respondents' trash or permitted others, such as the police, to do so. Accordingly, having deposited their garbage "in an area particularly suited for
public inspection and, in a manner of speaking, public consumption, for the express purpose of having strangers take it," United States v. Reicherter, 647 F.2d 397, 399 (CA3 1981), respondents could have had no reasonable expectation of privacy in the inculpatory items that they discarded.
Furthermore, as we have held, the police cannot reasonably be expected to avert their eyes from evidence of criminal activity that could have been observed by any member of the public. Hence, "[w]hat a person knowingly exposes to the public, even in his own home or office, is not a subject of Fourth Amendment protection." Katz v. United States, supra, at 351. We held in Smith v. Maryland, 442 U.S. 735 (1979), for example, that the police did not violate the Fourth Amendment by causing a pen register to be installed at the telephone company's offices to record the telephone numbers dialed by a criminal suspect. An individual has no legitimate expectation of privacy in the numbers dialed on his telephone, we reasoned, because he voluntarily conveys those numbers to the telephone company when he uses the telephone. Again, we observed that "a person has no legitimate expectation of privacy in information he voluntarily turns over to third parties." Id., at 743-744.
Similarly, we held in California v. Ciraolo, supra, that the police were not required by the Fourth Amendment to obtain a warrant before conducting surveillance of the respondent's fenced backyard from a private plane flying at an altitude of 1,000 feet. We concluded that the respondent's expectation that his yard was protected from such surveillance was unreasonable because "[a]ny member of the public flying in ...