delivered the opinion of the Court.
Section 11 of Mississippi’s Regulation Governing the Production and Sale of Milk and Milk Products in Mississippi, promulgated by the Mississippi State Board of Health (1967), provides, among other things, that “[m]ilk and milk products from . . . [another State] may be sold in . . . Mississippi. . . provided . . . that the regulatory agency [of the other State that] has jurisdiction accepts Grade A milk and milk products produced and processed in Mississippi on a reciprocal basis.”
1
I
Appellant, The Great Atlantic & Pacific Tea Co., Inc. (A&P), a Maryland corporation, owns and operates 38 outlets in Mississippi that engage in the retail sale
Evidence was stipulated before the District Court which conclusively established that the milk produced at the Kentwood plant fully complied with the requirements of § 11 in all respects save the required reciprocity agreement. The Kentwood plant had received milk sanitation-compliance ratings in excess of 90% in all respects following each inspection by Louisiana officials. These sanitation-compliance ratings were published in the Sanitation Compliance and Enforcement Ratings of Interstate Milk Shippers, a list compiled by the Public Health Service and the Food and Drug Administration of the United States Department of Health, Education, and Welfare (HEW), which includes only processors receiving compliance ratings from state officials who have been certified by the Public Health Serv
II
Mississippi’s answer to appellant’s Commerce Clause challenge is that the reciprocity requirement of § 11 is a reasonable exercise of its police power over local affairs, designed to assure the distribution of healthful milk products to the people of its State. We begin our analysis by again emphasizing that “[t]he very purpose of the Commerce Clause was to create an area of free trade among the several States.”
McLeod
v.
J. E. Dilworth Co.,
“Although the criteria for determining the validity of state statutes affecting interstate commerce have been variously stated, the general rule that emerges can be phrased as follows: Where the statute regulates evenhandedly to effectuate a legitimate local public interest, and its effects on interstate commerce are only incidental, it will be upheld unless the burden imposed on such commerce is clearlyexcessive in relation to the putative local benefits. Huron Cement Co. v. Detroit, 362 U. S. 440 , 443. If a legitimate local purpose is found, then the question becomes one of degree. And the extent of the burden that will be tolerated will of course depend on the nature of the local interest involved, and on whether it could be promoted as well with a lesser impact on interstate activities.” Pike v. Bruce Church, Inc.,397 U. S. 137 , 142 (1970). 6
Adjudication of Commerce Clause challenges to the validity of local milk regulations burdening interstate milk is not a novel experience for this Court. See,
e. g., Polar Ice Cream & Creamery Co.
v.
Andrews,
The District Court seems to have concluded that
Dean Milk Co.
v.
Madison, supra,
while especially pertinent to a decision upon the validity of the reciprocity provision
Dean Milk
identified as adequate to serve local interests, and yet less burdensome to the flow of interstate commerce, the alternatives of either inspection of the distant plants by city officials, or reliance on milk ratings obtained by officials in localities having standards as high as those of Madison, the enforcement of which could be verified by reliance on the United States Public Health Service’s system of checking local ratings. This latter alternative reflected the recommendation of the United States Public Health Service based on § 11 of the
The District Court in the instant case acknowledged that “[i]nterestingly enough Section 11 of the Mississippi regulation, but for the reciprocal clause, is identical in every material aspect to Section 11 of the U. S. Pvblic Health Service Ordinance” discussed in
Dean Milk.
The fallacy in the District Court’s reasoning is that it attached insufficient significance to the interference effected by the clause upon the national interest in freedom for the national commerce, and attached too great significance to the state interests purported to be served by the clause. Although not in terms an absolute and universal bar to sales of out-of-state milk, which was the effect of the Madison ordinance invalidated in
Dean Milk,
the barrier of the reciprocity clause to sales of out-of-state milk in Mississippi has in this case also “in practical effect exclude[d] from distribution in [Mississippi] wholesome milk produced ... in [Louisiana].”
Mississippi’s contention that the reciprocity clause serves its vital interests in maintaining the State’s health standards borders on the frivolous. The clause clearly does not do so in the sense of furthering Mississippi’s established milk quality standards. For, according to appellee, “§ 11 covenants that Mississippi will do the inspections, will certify them, and will accept a standard below that applicable to domestic producers if the forwarding state will do the same.” Brief for'Appellee 9. Thus, even if Louisiana’s standards were lower than Mississippi’s, the clause permits Louisiana milk to be admitted to Mississippi if Louisiana enters into á reciprocity agreement. The reciprocity clause thus disserves rather than promotes any higher Mississippi milk quality stand
Mississippi next argues that the reciprocity clause somehow enables Mississippi to assure itself that the reciprocating State’s (here Louisiana’s) health standards are the “substantial equivalent” of Mississippi’s.
8
But even if this were true, and the premise may be disputed,
9
there are means adequate to serve this interest
Ill
Mississippi argues that apart from the putative health-related interests served by the clause, the reciprocity requirement is in effect a free-trade provision, advancing the identical national interest that is served by the Commerce Clause.
The argument is two-pronged. First, Mississippi argues that the reciprocity requirement serves to help eliminate “hypertechnical” inspection standards that vary between different States.
12
Such hypertechnical standards are said to burden commerce by requiring costly duplicative or out-of-state inspection in instances where, for truly health-related purposes, the standards of the different States are “substantially equivalent.” The Court has recognized that mutually beneficial objectives may be promoted by voluntary reciprocity agreements, and that the existence of such an agreement between two or more States is not a
per se
violation of the Commerce Clause of which citizens of nonreciprocating States who do not receive the benefits conferred by the agreement may complain. See
Kane
v.
New Jersey,
The second prong of appellee’s argument that the reciprocity requirement promotes trade between the States draws upon Mississippi’s allegations that Louisiana is itself violating the Commerce Clause by refusing to admit milk produced in Mississippi. Mississippi asserts that Louisiana has refused reciprocity with Mississippi in bad faith, and in fact has erected economic barriers to the sale of Mississippi milk in Louisiana under the guise of health and inspection regulations. Hence, the reciprocity agreement, it is argued, is a legitimate means by which Mississippi may seek to gain access to Louisiana markets for its own producers as a condition to allowing Louisiana milk to be sold in Mississippi. We cannot agree.
First, to the extent, if any, that Louisiana is unconstitutionally burdening the flow of milk in interstate commerce by erecting and enforcing economic trade barriers
Second, to the extent that Louisiana is legitimately exercising its local powers in the interest of the health of its citizens by refusing reciprocity and consequently the admission of milk deemed in good faith by state officials to be of insufficient quality, Mississippi is not privileged under the Commerce Clause to force its own judgments as to an adequate level of milk sanitation on Louisiana at the pain of an absolute ban on the interstate flow of commerce in milk. However available such methods in an international system of trade between wholly sovereign nation states, they may not constitutionally be employed by the States that constitute the common market created by the Framers of the Constitution. To allow Mississippi to insist that a sister State either sign a reciprocal agreement acceptable to Mississippi or else be absolutely foreclosed from exporting its products to Mississippi would plainly “invite a multiplication of preferential trade areas destructive of the very purpose of the Commerce Clause.”
Dean Milk,
“The Constitution was framed under the dominion of a political philosophy less parochial in range. It was framed upon the theory that the peoples of the several states must sink or swim together, andthat in the long run prosperity and salvation are in union and not division.” Id., at 523.
The mandatory reciprocity provision of § 11, insofar as justified by the State as an economic measure, is “precisely the kind of hindrance to the introduction of milk from other States . . . condemned as an ‘unreasonable clog upon the mobility of commerce. ... [It is] hostile in conception as well as burdensome in result.’ ”
Polar Ice Cream & Creamery Co.
v.
Andrews,
Accordingly, we hold that the mandatory character of the reciprocity requirement of § 11 unduly burdens the free flow of interstate commerce and cannot be justified as a permissible exercise of any state power. The judgment of the District Court is reversed, and the case is remanded for further proceedings consistent with this opinion.
It is so ordered.
Mr. Justice Stevens took no part in the consideration or decision of this case.
Notes
Section 11 provides in full text:
“Milk and milk products from points beyond the limits of routine inspection of the state of Mississippi or its police jurisdiction, may be sold in the state of Mississippi or its police jurisdiction, providedthey are produced, pasteurized, and labeled under regulations which are substantially equivalent to this' Regulation and have been awarded an acceptable milk sanitation compliance rating of 90 percent or above made by a state milk sanitation rating officer certified by the U. S. Public Health Service, and Provided further, that the regulatory agency who [sic] has jurisdiction accepts Grade A milk and milk products produced and processed in Mississippi on a reciprocal basis. The health authority is authorized to require and conduct laboratory analysis and investigations to determine if the milk and milk products are in compliance with this Regulation.” Record 102.
The Commerce Clause, U. S. Const., Art. I, § 8, cl. 3, provides: “The Congress shall have power ... To regulate Commerce with foreign Nations, and among the several States, and with the Indian Tribes.”
Appellant also alleged a claim for relief under the Equal Protection Clause of the Fourteenth Amendment. In view of our conclusion we have no occasion to address that claim.
A&P attempted but failed to obtain the required reciprocity agreement from the Louisiana health authorities. It was informed by Louisiana health officials that Louisiana had not entered into a reciprocity agreement with any State, that in the opinion of Louisiana officials processed milk from Mississippi did not meet Louisiana health standards, and that Mississippi-processed milk from plants that met Louisiana standards would be admitted for sale in Louisiana. Record 15.
Appellee makes no contention that there are alternative means by which appellant’s milk may be judged qualified under Mississippi standards and thereby admitted for sale in the State. Indeed, appellee states that without reciprocity, milk from the Kentwood plant must be subjected to on-site inspection according to Mississippi health standards, and that Mississippi currently makes no provision for out-of-state inspection by Mississippi officials. Brief for Appellee 15-16, n. 1.
Adjudication entails “emphasis upon the concrete elements of the situation that concerns both state and national interests. The particularities of a local statute touch its special aims and the scope of their fulfillment, the difficulties which it seeks to adjust, the price at which it does so. . . . [P]raetical considerations, however screened by doctrine, underlie resolution of conflicts between state and national power.” F. Frankfurter, The Commerce Clause Under Marshall, Taney and Waite 33-34 (1937).
“[I]t seems clear that those interferences [with interstate commerce] not deemed forbidden are to be sustained . . . because a consideration of all the facts and circumstances, such as the nature of the regulation, its function, the character of the business involved and the actual effect on the flow of commerce, lead to the conclusion that the regulation concerns interests peculiarly local and does not infringe the national interest in maintaining the freedom of commerce across state lines.”
Di Santo
v.
Pennsylvania,
The parties stipulated in the District Court that the net annual cost to A&P incurred by its inability to use the product of its Kent-wood facility and its consequent reliance on alternative sources of supply was $195,700.
“If Louisiana will not give trust and reliance to Mississippi’s conduct of the inspections, then Mississippi is loath to accept the same Louisiana procedures, out of a regard for the health and welfare of her own citizens.” Brief for Appellee 11.
A sample reciprocity agreement acceptable to Mississippi is the following:
“AN ACCEPTABLE AGREEMENT TO MISSISSIPPI STATE BOARD OF HEALTH REGARDING RECIPROCITY IN THE MOVEMENT OF GRADE A MILK AND MILK PRODUCTS IN INTERSTATE SHIPMENT
“1. Each state shall be responsible for inspecting, sampling, and enforcing its regulations that apply to the dairies and milk plants located in its respective state, provided each state’s regulation is substantially equivalent.
“2. The appropriate state regulatory agency shall certify to the receiving state agency that the dairies and plants involved in interstate shipment hold a valid Grade A permit from said agency.
“3. Milk and milk products received into each state shall meet the chemical and bacteriological standards, labeling and delivery vehicle requirements of the receiving state.
“4. Public health sanitation ratings shall be made by certified rating officials of the respective states of any milk supply involved in interstate shipment. The ratings shall be submitted to the FDA-PHS to be included and maintained on the Interstate Milk Shippers List and published by the FDA-PHS so that they can make spot check ratings of the supplies involved to determine if satisfactorysanitation surveillance is being carried out by the respective state. All sanitation ratings shall be 90% in compliance or above in order to be acceptable to the respective states.
“5. The regulatory agencies of each state shall sign reciprocity agreements containing the above stipulations.”
On this record, we are not presented with and need not decide the question of the constitutionality under the Commerce Clause of a State's insistence on reinspection of milk originating in a foreign State where that insistence is not prompted by a health-related need to assure adequate standards but rather is prompted solely as a retaliatory measure because the foreign State refuses to accept the receiving State’s standards as adequate.
Mississippi’s regulations call for inspection of “each dairy farm, milk hauler, milk plant, receiving station, and transfer station whose milk or milk products are intended for consumption within the State of Mississippi” as a condition to the issuance of a permit, and for periodic inspection thereafter. Miss. Reg. § 5, Record 77. Although appellant’s Kentwood plant is, of course, located outside Mississippi and would require out-of-state inspection by Mississippi officials, only six of 105 dairy farms from which A&P purchases raw milk are located outside Mississippi. Plaintiff’s Exhibit 1, and Exhibit A.
Appellant represents that it has already offered to pay the
“[W]e say this regulation is wiser and more productive for interstate commerce through all the States than having these picayune problems of how many square feet of floor, space is in the milk parlor, or what the temperature of the milk is when it goes to the cooling truck.” Tr. of Oral Arg. 20.
A&P agrees that reciprocity among States is a “laudable goal. Reciprocity, by eliminating hyper-technical standards peculiar to one state, may aid the free flow of milk.” Jurisdictional Statement 9.
We are not called upon to decide in this case whether or at what point the diversionary effects upon trade occasioned by a given reciprocity agreement (even though voluntary and nondiscriminatory) between some but not all States might be such as to constitute an impermissible burdening of the national interests embodied in the Commerce Clause, or the Compact Clause. Cf.
Bode
v.
Barrett,
