OPINION
¶ 1 This case requires us to determine the constitutionality of a city’s random, suspicion-less drug testing of its firefighters. We exercise jurisdiction pursuant to Article VI, Section 5.3 of the Arizona Constitution, Arizona Revised Statutes (A.R.S.) section 12-120.24, and Rule 23 of the Arizona Rules of Civil Appellate Procedure.
I.
¶ 2 Craig Petersen works as a firefighter for the City of Mesa. In 2001, after Petersen was hired, the City implemented a substance abuse program (the Program) for the Mesa Fire Department. The Program requires testing of firefighters (1) if the-Department has reasonable suspicion to believe an individual firefighter has abused drugs or alcohol; (2) after a firefighter is involved in an accident on the job; (3) following a firefighter’s return to duty or as a follow-up to “a determination that a covered member is in need of assistance”; and (4) “on an unannounced and random basis spread reasonably throughout the calendar year.”
¶3 Under the Program’s random testing provision, a computer program selects the firefighters to be tested. The Department notifies firefighters of their selection for random testing immediately before, during, or after work; the firefighters are to be tested within thirty minutes of their notification, with allowance for travel time to the laboratory for collection. Once at the laboratory, firefighters are permitted to use private bathroom stalls when providing urine samples, which are then inspected by a monitor for the proper color and temperature.
¶ 4 The laboratory tests the sample for the presence of marijuana, cocaine, opiates, am *37 phetamines, and phencyclidine. 1 The laboratory initially tests the specimens by using an immunoassay test that meets the requirements of the Food and Drug Administration for commercial distribution. The laboratory then confirms all positive test results using the gas chromatography/mass spectrometry technique and reports positive results to a Medical Review Officer (MRO), who has a “detailed knowledge of possible alternate medical explanations.” The MRO reviews the results before giving the information to the Department’s administrative official. Only confirmed tests are reported to the Department as positive for a specific drug. Before verifying a positive result, however, the MRO must contact the firefighter on a confidential basis.
¶ 5 The Department does not release information in a firefighter’s drug testing record outside the Department without the firefighter’s consent. A firefighter whose test reveals a blood alcohol concentration in excess of that allowed under the Program or who tests positive for any of several specified drugs is removed from all covered positions and is evaluated by a substance abuse professional. The Department may discipline or terminate the employment of a firefighter who tests positive a second time or who refuses to submit to a required test.
¶ 6 According to section 8 of the Program, the primary purpose of the random testing component “is to deter prohibited alcohol and controlled substance use and to detect prohibited use for the purpose of removing identified users from the safety-sensitive work force.” This purpose advances the City’s goal of establishing “a work environment that is totally free of the harmful effects of drugs and the misuse of alcohol.”
¶ 7 Petersen filed a complaint in superior court seeking declaratory and injunctive relief, alleging that the random testing component of the Program violated his rights under both Article II, Section 8 of the Arizona Constitution and the Fourth Amendment to the United States Constitution.
2
The trial court held that the Program violated the Arizona Constitution and permanently enjoined the Department from continuing random, suspicionless drug and alcohol testing of the City’s firefighters. The court of appeals reversed, holding that the Program’s random testing component is reasonable under both the Arizona and United States Constitutions. The court reasoned that the City’s “compelling need to discover specific but hidden conditions representing grave risks to the health and safety of the firefighters and the public” outweighed Petersen’s privacy interests.
Petersen v. City of Mesa,
¶ 8 Under the analysis set forth below, we hold that the Program’s random testing component is unreasonable and therefore violates the Fourth Amendment to the United States Constitution. 3
*38 II.
¶ 9 The Fourth Amendment to the United States Constitution protects “[t]he right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures.” U.S. Const. amend. IV. “The Amendment guarantees the privacy, dignity, and security of persons against certain arbitrary and invasive acts by officers of the Government or those acting at their direction.”
Skinner v. Ry. Labor Executives’Ass’n,
¶ 10 As the language of the Fourth Amendment makes clear, “the ultimate measure of the constitutionality of a governmental search is ‘reasonableness.’ ”
Vernonia Sch. Dist. 47J v. Acton,
¶ 11 The Supreme Court, however, has recognized limited exceptions to this general rule “when ‘special needs, beyond the normal need for law enforcement, make the warrant and probable-cause requirement impracticable.’ ”
Id.
at 619,
¶ 12 The City concedes that its use of random, suspicionless testing is not based on any level of individualized suspicion. The City argues, however, that such testing is reasonable under the Fourth Amendment because the search “serves special governmental needs, beyond the normal need for law enforcement.”
Nat’l Treasury Employees Union v. Von Raab,
A.
¶ 13 Neither the Supreme Court nor this court has considered the reasonableness of random, suspicionless testing of city firefighters. The Supreme Court, however, has examined the constitutionality of suspicion-less drug testing requirements analogous to the procedures Petersen challenges.
See Bd. of Educ. of Indep. Sch. Dist. No. 92 v. Earls,
¶ 14 Applying this “special needs” balancing test to the facts presented in this case, we begin by analyzing the City’s proffered interests. Although the City need not present a “compelling” interest, the City’s interest must be “important enough” to justify the government’s intrusion into the firefighters’ legitimate expectations of privacy.
Vernonia,
¶ 15 The City asserts that it has a “special need” to test firefighters because they occupy safety-sensitive positions. The City alleges that random testing furthers this interest by deterring “prohibited alcohol and controlled substance use” and detecting “prohibited use for the purpose of removing identified users from the safety-sensitive work force.” We agree that the City has an interest in deterring and detecting prohibited alcohol and drug use among the City’s firefighters.
¶ 16 Fourth Amendment analysis, however, requires that we do more than recognize that the City has an interest in deterring drug use among employees in safety-sensitive positions. In addition, we must look to the nature and immediacy of the City’s concern.
Id.
at 660,
¶ 17 The record before us provides little information about the City’s reasons for adopting random testing and provides no evidence to explain the City’s perceived need to conduct such testing. As the City conceded at oral argument, the record is devoid of any indication that the City has ever encountered any problem involving drug use by its firefighters. The record lacks not only evidence of even a single instance of drug use among the firefighters to be tested but also any evidence of accidents, fatalities, injuries, or property damage that can be attributed to drug or alcohol use by the City’s firefighters. No evidence of record suggests that the firefighters asked for or consented to the testing policy, and the record includes not even an allegation or rumor that the City’s firefighters used or abused drugs or alcohol. Based on this record, we detect no real and substantial risk that the public safety is threatened by drug or alcohol use among the firefighters to be tested. The absence of evidence of drug use, at least as reflected in the record, provides no basis for us to conclude that random, suspicionless testing is calibrated to respond to any defined risk. At most, the Program’s random testing component furthers only a generalized, unsubstantiated interest in deterring and detecting a hypothetical drug abuse problem among the City’s firefighters. 4
¶ 18 Nonetheless, relying primarily upon
Von Raab, Vernonia,
and
Earls,
the City asserts that the Supreme Court “has not required a particularized or pervasive drug problem before allowing the government to conduct suspicionless drug testing.”
Earls,
¶ 19 In
Von Raab,
the Court examined the constitutionality of a United States Customs Service program requiring Customs Service employees to submit to suspieionless testing upon promotion or transfer to positions directly involved in the interdiction of illegal drugs or positions that required carrying a firearm.
¶20 Unlike the Customs Service employees in
Von Raab,
the City’s firefighters are not directly involved in drug interdiction, do not carry a firearm, and are not required to use deadly force in the regular course of their duties. In addition, the firefighters’ communal work environment provides a better opportunity for supervisors to detect drug use and therefore develop reasonable suspicion to conduct a test under appropriate circumstances. This environment reduces the risk that a firefighter could cause “great human loss before any signs of impairment become noticeable to supervisors or others.”
Skinner,
¶ 21
Vernonia
and
Earls
also provide limited support for the City’s random testing of its firefighters. In
Vernonia
and
Earls,
the Court upheld school district policies that required students participating in extracurricular activities to submit to random drug tests.
Earls,
¶ 22 Firefighters, of course, have little in common with students entrusted to the government’s care. As Judge Hall correctly noted, “unlike a public school studentfs right to privacy], a firefighter’s right to privacy, although limited in some respects, is not inherently ‘subjeet[ ] to greater controls than those appropriate for adults.’ ”
Petersen,
¶23 Moreover, unlike the record in this case, the records in both the
Earls
and
Ver-nonia
actions presented specific evidence of drug use that supported the districts’ decisions to institute the testing regimes. In
Vernonia,
an “immediate crisis,”
¶ 24 Given the dearth of evidence by which we can measure the strength of the City’s proffered “special need” and the City’s failure to articulate how the Program’s random testing procedures further its interests, we conclude that the City has failed to define any real and substantial risk that random, suspicionless testing is designed to address. Nonetheless, because the Supreme Court has stated that a lack of empirical data, by itself, is not fatal to a suspicionless testing program,
Von Raab,
B.
¶ 25 The collection of urine and breath samples for purposes of drug and alcohol testing “infringes an expectation of privacy that society is prepared to recognize as reasonable.”
Skinner,
¶ 26 As was true of the railway employees in Skinner, the City’s firefighters possess a diminished expectation of privacy. The safety risks associated with becoming a firefighter are well known. We entrust firefighters with protecting both the community at large and their colleagues from danger, while putting their own well-being at great risk of harm. A firefighter’s ability to do this job in a safe and effective manner depends, in substantial part, on his or her health and fitness. In addition, a firefighter, while on duty, lives in a communal environment. Given all these factors, we conclude that individuals who elect to become firefighters should anticipate a diminished expectation of privacy and should reasonably expect some intrusion into matters involving their health and fitness.
¶ 27 The strength of any asserted privacy interest also turns upon the “character of the intrusion.”
Vernonia,
¶28 These procedures, which attempt to guard the firefighters’ privacy interests to the extent possible, all work to reduce the intrusiveness of the privacy invasion. Nonetheless, given the random nature of these searches, we cannot conclude that “the privacy interests implicated by the search are minimal.”
Skinner,
¶ 29 The Supreme Court has not examined random testing procedures outside of the unique school setting.
Earls,
¶ 30 Outside the school context, the Court has recognized that notification in advance of a scheduled search minimizes the intrusiveness of the search.
Von Raab,
Only employees who have been tentatively accepted for promotion or transfer to one of the three categories of covered positions are tested, and applicants know at the outset that a drug test is a requirement of those positions. Employees are also notified in advance of the scheduled sample collection, thus reducing to a minimum any “unsettling show of authority’ that may be associated with unexpected intrusions on privacy.
Id.
(quoting
Delaware,
¶ 31 Consistent with the Court’s statements in
Von Raab,
a number of federal and state courts have acknowledged the increased privacy concerns occasioned by random testing.
See, e.g., Bluestein v. Skinner,
Because the policys provision for random testing could subject employees to “unannounced” probing throughout the course of their employment, the tests are peculiarly capable of being viewed as “unexpected intrusions on privacy.” For example, it might seem manifestly unreasonable for any person applying for a safety-sensitive position in a heavily regulated field of activity not to anticipate — and implicitly agree to — a probing inquiry into the applicant’s capacity to perform job-related duties; the same would hold true for any employee who might be promoted, demoted, transferred, or become involved in a job-related accident. But a job applicant or employee who anticipated such inquiries *43 might nevertheless expect not to be subjected to a continuous and unrelenting government scrutiny that exposes the employee to unannounced testing at virtually any time. Such expectations cannot be so readily dismissed as patently unreasonable.
Id. at 557-58 (citations omitted).
¶32 Although the Alaska Supreme Court analyzed the Anchorage plan under its state constitution, we find the court’s reasoning about the difference between random and announced or scheduled tests persuasive. The very nature of random, suspicionless searches precludes any advance notification and subjects employees to continuous government scrutiny. Random testing, therefore, necessarily raises the specter of the “ ‘unsettling show of authority’ that may be associated with unexpected intrusions on privacy.”
Von Raab,
III.
¶ 33 Balancing Petersen’s privacy interests against the interests the City advances in favor of the Program’s random component, we conclude that the City’s generalized and unsubstantiated interest in deterring and detecting alcohol and drug use among the City’s firefighters by conducting random drug tests is insufficient to overcome even the lessened privacy interests of the firefighters in this case. The situation we consider, on this record, cannot be described as one of the “limited circumstances, where the privacy interests implicated by the search are minimal, and where an important governmental interest furthered by the intrusion would be placed in jeopardy by a requirement of individualized suspicion, [and in which] a search may be reasonable despite the absence of such suspicion.”
Skinner; 489
U.S. at 624,
IV.
¶ 34 For the foregoing reasons, we vacate the court of appeals’ opinion and affirm the trial court’s judgment enjoining the City from enforcing the random, suspicionless component of the Program.
Notes
. In addition, twenty percent of those tested are selected for an alcohol breath test.
. Petersen does not challenge testing on the basis of reasonable suspicion, after an on-the-job accident, following a return to duty, or as a follow-up to "a determination that a covered member is in need of assistance.” As a result, we express no opinion regarding the constitutionality of these Program provisions.
. Petersen argues that Article II, Section 8 of the Arizona Constitution, which expressly provides that "[n]o person shall be disturbed in his private affairs ... without authority of law,” affords greater protection against drug testing than does the Fourth Amendment. Our conclusion that the random testing component violates the Fourth Amendment obviates the need to consider whether the protections granted by the Arizona Constitution extend beyond those afforded defendants by the federal constitution. Although the Arizona Constitution may impose stricter standards on searches and seizures than does the federal constitution, Arizona courts cannot provide less protection than does the Fourth Amendment.
See, e.g., Cooper v. California,
. While we recognize and applaud the City's interest in deterring drug use among firefighters, the Program also requires testing upon reasonable suspicion, after an accident on the job, and following a return to duty or as a follow-up to "a determination that a covered member is in need of assistance.” The record before us provides no basis for concluding that these testing alternatives fail to deter and detect drug use among the City’s firefighters.
