Cite as: 504 U. S. 353 (1992)
Opinion of the Court
ume and composition of future waste flows may be an indispensable part of a comprehensive waste disposal plan, Michigan could attain that objective without discriminating between in- and out-of-state waste. Michigan could, for example, limit the amount of waste that landfill operators may accept each year. See Philadelphia v. New Jersey, 437 U. S., at 626. There is, however, no valid health and safety reason for limiting the amount of waste that a landfill operator may accept from outside the State, but not the amount that the operator may accept from inside the State.
Of course, our conclusion would be different if the imported waste raised health or other concerns not presented by Michigan waste. In Maine v. Taylor, 477 U. S. 131 (1986), for example, we upheld the State's prohibition against the importation of live baitfish because parasites and other characteristics of nonnative species posed a serious threat to native fish that could not be avoided by available inspection techniques. We concluded:
"The evidence in this case amply supports the District Court's findings that Maine's ban on the importation of live baitfish serves legitimate local purposes that could not adequately be served by available nondiscriminatory alternatives. This is not a case of arbitrary discrimination against interstate commerce; the record suggests that Maine has legitimate reasons, 'apart from their origin, to treat [out-of-state baitfish] differently,' Philadelphia v. New Jersey, 437 U. S., at 627." Id., at 151-152.
In this case, in contrast, the lower courts did not find—and respondents have not provided—any legitimate reason for allowing petitioner to accept waste from inside the county but not waste from outside the county.
For the foregoing reasons, the Waste Import Restrictions unambiguously discriminate against interstate commerce and are appropriately characterized as protectionist measures that cannot withstand scrutiny under the Commerce
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