Opinion
NORCOTT, J.
The principal issue in this appeal is whether the trial court improperly concluded that the defendant, the department of public health (department), has jurisdiction over land owned by the plaintiff, the town of Wallingford (town), even though the land is not owned by the town’s water division and is not used for water utility purposes pursuant to General Statutes (Rev. to 1999) § 25-321 et seq. The trial court [760]*760rendered judgment dismissing the town’s appeal from [761]*761the department’s declaratory ruling that the land is subject to the department’s jurisdiction as “ ‘water company land’ ” under § 25-32. The town appeals2 from, and we affirm, the judgment of the trial court.
The record reveals the following undisputed facts and procedural history. The town is a municipality that operates its own water division as a governmental department under the town charter. The town’s board [762]*762of public utilities commission, whose commissioners are appointed by the town mayor and confirmed by the town council, supervises and sets policy for the water division.3 Water division personnel are town employees.
Pursuant to General Statutes § 7-240,4 the water division is a self-sustaining entity, the funds of which are held separately from the town’s general fund; all moneys received by the water division are used for the provision of water service. The water division’s operation is paid for by the businesses and residents that it serves; not all residents or businesses are connected to the water division’s water supply system. The water division’s budget, however, is controlled and approved by the town council. Moreover, the public utilities commission has no authority to develop a budget or operate the water division without town council approval, and the water division does not pay taxes to the town. The town purchases insurance for the water division; that cost, however, is recouped annually through the division’s rates. Under the town charter, any land purchased by the water division must be acquired in the name of the town. When the water division discontinues the use of any such property, the use of the property reverts to the town.
In January, 1999, the town purchased the parcel at issue in this case, the Cooke property, for open space or other necessary purposes. No water division funds [763]*763were used to make the purchase. The property is located within the watershed of the south central regional water authority, which supplies the New Haven region with drinking water. Although the property is part of the watershed, potentially impacting New Haven’s drinking water, it has no effect on the town’s drinking water supply. In May, 1999, the mayor, on behalf of the town, notified the department that the property had been purchased and that the town was considering constructing a golf course on the Cooke property. In June and July, 1999, the department notified the town that a permit was required to change the property’s use, such as by constructing a golf course, despite the fact that the property is not part of the watershed impacting the town’s water supply.
In March, 2000, the town filed this petition with the department seeking a declaratory ruling to determine whether the Cooke property was, pursuant to § 25-32, subject to the department’s jurisdiction as “water company land.” The town claimed that the statute was not applicable because the town could not be considered a water company; therefore, the town contended that the land at issue was not water company property. The department ruled that the statute applied to all land owned by the town, and that the property was, therefore, subject to department jurisdiction as “water company land located on a public drinking water supply watershed.” In issuing its ruling, the department noted the town’s “special duties and responsibilities to the public” because of its role as a governmental entity that is also a water company.
The town appealed from the department’s ruling to the trial court. While that appeal was pending in the trial court, the General Assembly enacted Public Acts, Spec. Sess., June, 2001, No. 01-4, § 13 (Spec. Sess. P.A. [764]*76401-4).5 This act resolved the specific controversy over the Cooke property that led to the town’s request for the department’s declaratory ruling. It permits “any municipality owning land purchased in January, 1999, that was formerly used for agricultural purposes and that is watershed land or is located adjacent to watershed land [to] use such municipally-owned land for the construction and operation of a golf course,” subject to certain environmental protection conditions on land ownership and management. Spec. Sess. P.A. 01-4, § 13; see footnote 5 of this opinion. The trial court ruled as a threshold matter that the legislation did not render the case moot because it did not resolve the issue of the department’s jurisdiction over the remainder of the town’s nonwater utility land. Both parties agreed with the trial court’s mootness determination because the town owned other land not used for water utility purposes that might also be subject to the department’s jurisdiction.
Turning to the merits of the case, the trial court then applied the standard of review set forth by this court [765]*765in Bridgeport Hospital v. Commission on Human Rights & Opportunities, 232 Conn. 91, 109, 653 A.2d 782 (1995),6 and noted that the department’s factual findings were uncontested. The trial court then proceeded to construe the language and legislative history of § 25-32. It concluded that the town was a water company explicitly subject to regulation by the department, and that requiring it to comply with the department’s water supply planning requirements would not harm the town, while at the same time it would effectuate the legislative policy of protecting Connecticut’s drinking water. Accordingly, the trial court rendered judgment dismissing the town’s appeal. This appeal followed.
I
MOOTNESS
As a threshold matter, we first address whether the trial court properly concluded that the passage of Spec. Sess. P.A. 01-4, § 13, did not render the matter moot because of the effect of the department’s ruling on the other town owned, nonwater utility lands.7 The depart[766]*766ment claims that the matter is not moot because Spec. Sess. P.A. 01-4 does not change the ruling that the town government is a water company subject to its jurisdiction, or negate the regulatory scheme, except for the limited authorization to use the property in question as a golf course. The town contends that the matter is not moot because its position is that the Cooke property is not subject to department jurisdiction in any way, whatever its intended use. The town also claims that this case falls into the “capable of repetition, yet evading review” exception to the mootness doctrine. See Loisel v. Rowe, 233 Conn. 370, 385, 660 A.2d 323 (1995). We agree with the parties and the trial court that this matter is not moot. We base our conclusion, however, on the collateral consequences doctrine, as recently stated in State v. McElveen, 261 Conn. 198, 802 A.2d 74 (2002), and Williams v. Ragaglia, 261 Conn. 219, 802 A.2d 778 (2002).
Mootness is a question of justiciability that must be determined as a threshold matter because it “implicates [this] court’s subject matter jurisdiction . . . .” Board of Education v. Naugatuck, 257 Conn. 409, 412, 778 A.2d 862 (2001). Indeed, we are required to address this question of justiciability, even in the “unusual situation” where all of the parties agree that the matter is not moot. Id. We begin with “the four part test for justiciability established in State v. Nardini, 187 Conn. 109, 445 A.2d 304 (1982). . . . ‘Because courts are established to resolve actual controversies, before a claimed controversy is entitled to a resolution on the merits it must be justiciable. Justiciability requires (1) that there be an actual controversy between or among the parties to the dispute ... (2) that the interests of the parties be adverse ... (3) that the matter in controversy be capable of being adjudicated by judicial power . . . and (4) that the determination of the controversy will [767]*767result in practical relief to the complainant.’ . . . Id., 111-12.” Board of Education v. Naugatuck, supra, 416.
The mootness doctrine is rooted in the first factor of the Nardini test. State v. McElveen, supra, 261 Conn. 204-205. It is founded on “the same policy interests as the doctrine of standing, namely, to assure the vigorous presentation of arguments concerning the matter at issue. . . . This court recently reiterated that the standing doctrine is designed to ensure that courts and parties are not vexed by suits brought to vindicate nonjusticiable interests and that judicial decisions which may affect the rights of others are forged in hot controversy, with each view fairly and vigorously represented.” (Citation omitted; internal quotation marks omitted.) Id., 204. Indeed, we note that “courts are called upon to determine existing controversies, and thus may not be used as a vehicle to obtain advisory judicial opinions on points of law.” Id., 204-205.
“[A]n actual controversy must exist not only at the time the appeal is taken, but also throughout the pendency of the appeal. . . . When, during the pendency of an appeal, events have occurred that preclude an appellate court from granting any practical relief through its disposition of the merits, a case has become moot.” (Internal quotation marks omitted.) Id., 205. However, under “this court’s long-standing mootness jurisprudence . . . despite developments during the pendency of an appeal that would otherwise render a claim moot, the court may retain jurisdiction when a litigant shows that ‘there is a reasonable possibility that prejudicial collateral consequences will occur.’ Id., 208 . . . .” (Citations omitted.) Williams v. Ragaglia, supra, 261 Conn. 226.
“ [T]o invoke successfully the collateral consequences doctrine, the litigant must show that there is a reasonable possibility that prejudicial collateral consequences [768]*768will occur. Accordingly, the litigant must establish these consequences by more than mere conjecture, but need not demonstrate that these consequences are more probable than not. This standard provides the necessary limitations on justiciability underlying the mootness doctrine itself. Where there is no direct practical relief available from the reversal of the judgment, as in this case, the collateral consequences doctrine acts as a surrogate, calling for a determination whether a decision in the case can afford the litigant some practical relief in the future.” State v. McElveen, supra, 261 Conn. 208.
Williams v. Ragaglia, supra, 261 Conn. 221-23, is particularly instructive on the showing necessary, in the context of administrative appeals, to establish a reasonable possibility of collateral consequences.8 In Williams, the commissioner of children and families issued a decision revoking the plaintiffs special study foster care license as a consequence for violating certain department foster care regulations. Id. The commissioner then initiated proceedings to remove the foster children, who were the subjects of the original foster care license, from the plaintiffs home. Id., 223. The plaintiff responded by filing a habeas coipus petition seeking legal custody of the children, along with a con[769]*769temporaneous administrative appeal. Id. While the administrative appeal was pending, the plaintiff was granted legal custody of the two children as a result of the habeas corpus petition. Id., 224. As legal guardian, the plaintiff no longer needed the special foster care license and the trial court dismissed her administrative appeal as moot. Id. We, however, concluded that the dismissal on mootness grounds was improper. Id., 224; see id., 228-29. We noted that the commissioner could use the plaintiffs license revocation against her in future department proceedings; id., 227; a consequence that was not unduly speculative because of “the reasonable possibility that a person, such as the plaintiff, who has agreed selflessly to become a foster parent to children not her own, will again in the future become a foster parent and have occasion to interact with the department.”9 Id., 229. We concluded that, under the totality of circumstances, the matter was not moot and the trial court could retain jurisdiction because the plaintiff had sufficiently established the reasonable possibility of prejudicial collateral consequences from the commissioner’s decision. Id., 236.
In the present case, we are satisfied that, under the totality of the circumstances, there is a reasonable possibility of prejudicial collateral consequences for the town from the department’s ruling. The department’s ruling declaring the town a water company potentially subjects the town to statutory responsibilities that exceed the boundaries of the Cooke property.10 See [770]*770General Statutes (Rev. to 1999) § 25-32 et seq. Moreover, the planning for the golf course is still in an embryonic stage; regardless of whether a golf course is ever built on the subject land,11 the town’s land remains subject to the department’s jurisdiction as a result of the original agency ruling. We, therefore, conclude that Spec. Sess. P.A. 01-4, § 13, did not render this case moot because of the prejudicial collateral consequences for the town from the department’s ruling.12
[771]*771II
STANDARD OF REVIEW
The first substantive issue in this appeal is whether the trial court applied the proper standard of review in its analysis of the department’s declaratory ruling by applying the standard set forth in Bridgeport Hospital v. Commission on Human Rights & Opportunities, supra, 232 Conn. 109. See footnote 6 of this opinion. The town claims that the trial court misapplied Bridgeport Hospital by omitting the portion of that opinion declining to give deference to agency decisions involving questions of law not previously subject to judicial scrutiny; Bridgeport Hospital v. Commission on Human Rights & Opportunities, supra, 110; thereby resulting in an improperly deferential review of the department’s statutory interpretation. The department contends that the trial court properly deferred to the department’s factual findings while correctly engaging in a broader review of its legal conclusions and statutory interpretation. We agree with the department and conclude that the trial court applied the correct standard of review in this administrative appeal.
The standard of review applied by the trial court is an accurate statement of the well established law governing judicial review of statutory interpretations by administrative agencies. In Cadlerock Properties Joint Venture, L.P. v. Commissioner of Environmental Protection, 253 Conn. 661, 669, 757 A.2d 1 (2000), cert. denied, 531 U.S. 1148, 121 S. Ct. 1089, 148 L. Ed. 2d 963 (2001), we stated: “Although the interpretation of statutes is ultimately a question of law ... it is the [772]*772well established practice of this court to accord great deference to the construction given [a] statute by the agency charged with its enforcement. . . . Conclusions of law reached by the administrative agency must stand if the court determines that they resulted from a correct application of the law to the facts found and could reasonably and logically follow from such facts. . . . We also have held that an exception is made when a state agency’s determination of a question of law has not previously been subject to judicial scrutiny . . . the agency is not entitled to special deference.” (Citations omitted; internal quotation marks omitted.) Accord Bridgeport Hospital v. Commission on Human Rights & Opportunities, supra, 232 Conn. 109 (“[a]s we have stated many times, the factual and discretionary determinations of administrative agencies are to be given considerable weight by the courts . . . [however] it is for the courts, and not for administrative agencies, to expound and apply governing principles of law” [citations omitted; internal quotation marks omitted]). Our review of the trial court’s memorandum of decision, with its thorough analysis of the language and legislative history of § 25-32, indicates that the trial court applied the proper standard of review and did not give improper deference to the department’s statutory interpretation.
Ill
CONSTRUCTION OF GENERAL STATUTES (REV. TO 1999) § 25-32
We next consider the principal issue in this case, which is whether the trial court properly construed § 25-32 when it concluded that the department has jurisdiction over town owned land not used for water utility purposes. The town claims that the trial court’s interpretation was improper because both the statutory framework and the legislative history evince the legislature’s [773]*773intent to confine the statute’s application to only those town owned properties used for water utility purposes. The department contends that the statutory language and legislative purpose support a broad construction of the statute and its application to all town owned land. We agree with the department.
“Statutory interpretation is a matter of law over which this court’s review is plenary.” (Internal quotation marks omitted.) Hammond v. Commissioner of Correction, 259 Conn. 855, 861, 792 A.2d 774 (2002). We follow the method of statutory interpretation recently articulated in State v. Courchesne, 262 Conn. 537, 816 A.2d 562 (2003). “The process of statutory interpretation involves a reasoned search for the intention of the legislature. ... In other words, we seek to determine, in a reasoned manner, the meaning of the statutory language as applied to the facts of [the] case, including the question of whether the language actually does apply. In seeking to determine that meaning, we look to the words of the statute itself, to the legislative history and circumstances surrounding its enactment, to the legislative policy it was designed to implement, and to its relationship to existing legislation and common law principles governing the same general subject matter. . . . Thus, this process requires us to consider all relevant sources of the meaning of the language at issue, without having to cross any threshold or thresholds of ambiguity. Thus, we do not follow the plain meaning rule.
“In performing this task, we begin with a searching examination of the language of the statute, because that is the most important factor to be considered. In doing so, we attempt to determine its range of plausible meanings and, if possible, narrow that range to those that appear most plausible. We do not, however, end with the language. We recognize, further, that the purpose or purposes of the legislation, and the context of the [774]*774language, broadly understood, axe directly relevant to the meaning of the language of the statute.
“This does not mean, however, that we will not, in a given case, follow what may be regarded as the plain meaning of the language, namely, the meaning that, when the language is considered without reference to any extratextual sources of its meaning, appears to be the meaning and that appears to preclude any other likely meaning. In such a case, the more strongly the bare text supports such a meaning, the more persuasive the extratextual sources of meaning will have to be in order to yield a different meaning.” (Citations omitted; emphasis in original; internal quotation marks omitted.) Id., 577-78.
The present case is this court’s first opportunity to construe § 25-32. We start our analysis with the relevant statutory language, and note the broad phrasing of General Statutes (Rev. to 1999) § 25-32 (a), which provides that the department “shall have jurisdiction over all matters concerning the purity and adequacy of any source of water or ice supply used by any municipality, public institution or water or ice company for obtaining water or ice, the safety of any distributing plant and system for public health purposes, the adequacy of methods used to assure water purity, and such other matters relating to the construction and operation of such distributing plant and system as may affect public health. ...” (Emphasis added.) See footnote 1 of this opinion. Subsection (b) of General Statutes (Rev. to 1999) § 25-32 then provides: “No water company shall sell, lease, assign or otherwise dispose of or change the use of any watershed lands, except as provided in section 25-43c, without a written permit from the Commissioner of Public Health. ...” (Emphasis added.) See footnote 1 of this opinion. The remainder of subsection (b) and subsections (c) through (e) of General Statutes (Rev. to 1999) § 25-32 describe the [775]*775permitting process and the factors that the department commissioner should consider in granting permits for two of the three classes13 of water company land.14 See footnote 1 of this opinion. Finally, subsections (f) through (j) of General Statutes (Rev. to 1999) § 25-32 provide additional definitions, directives and authority for the commissioner.
The applicability of § 25-32 is controlled by the definition of the term of “water company.” A statutory definition for “water company” is provided by General [776]*776Statutes § 25-32a,15 and it includes “any . . . municipality . . . which owns, maintains, operates, manages, controls or employs any pond, lake, reservoir, well, stream or distributing plant or system that supplies water to two or more consumers or to twenty-five or more persons on a regular basis . . . .” (Emphasis added.) See footnote 15 of this opinion. Thus, the precise question presented in this case is whether the trial court properly construed the term “municipality” under § 25-32a to encompass the town, rather than limiting it to the town’s water division as a separate entity.
We conclude that the trial court properly determined that the town is a “water company” within the § 25-32a definition, thus subjecting it to the department’s jurisdiction under § 25-32. It is undisputed that the town is a municipality controlling the water division. The language of the statute is the most important guide to determining the legislature’s intent; see State v. Courchesne, supra, 262 Conn. 578; this statutory definition, therefore, strongly suggests the conclusion that the town is included within the definition of “water company.”
Moreover, this strong linguistic suggestion is supported by our review of the pertinent legislative history. The legislature enacted Public Acts 1977, No. 77-606, § 4, subsequently codified as § 25-32, as a result of rec[777]*777ommendations by the council on water company lands, an agency created in 1975 “to recommend to the Legislature a comprehensive policy on disposition of the lands held by water utilities.” 20 H.R. Proc., Pt. 14,1977 Sess., p. 5855, remarks of Representative Dorothy S. McCluskey. Public Act 77-606 implemented the land classification and department review scheme of § 25-32; it expressly stated in the section codified as General Statutes § 25-37a16 that the statutes were intended to protect the state’s water supply and noted that watershed “lands constitute a significant portion of the remaining undeveloped and open space lands in close proximity to the urbanized areas of the state, and that it is in the public interest that there be established criteria for the orderly disposition of such lands. . . .”17 Thus, § 25-32 et seq. are “statutes whose object is the protection and preservation of the public health” that
[778]*778we deem remedial in purpose; accordingly, we construe them liberally. State v. Racskowski, 86 Conn. 677, 680, 86 A. 606 (1913); accord BEC Corp. v. Dept. of Environmental Protection, 256 Conn. 602, 621-22, 775 A.2d 928 (2001) (“[o]ur conclusion that the individual [corporate officers] personally are hable under [General Statutes] § 22a-432 is supported by the broad remedial purpose of the act, which is to protect the waters of the state from pollution”). Our reading of the broad language of § 25-32a serves to effectuate the legislative policy of protecting the adequacy and purity of Connecticut’s drinking water. We, therefore, reject the town’s narrower interpretation of these statutes’ applicability18 because it thwarts the legislature’s goal of providing maximum protection for Connecticut’s drinking water supply.
The town cites to General Statutes § 7-23419 et seq., the statutes providing for the establishment of munici[779]*779pal waterworks systems, as support for the proposition that the legislature intended the water division to be an entity legally distinct from the town government itself; thereby drawing a distinction between land owned or utilized by the water division and land owned by a municipality’s general government. The department responds by arguing that the town and the water division constitute a single economic enterprise for regulatory purposes. We agree with the department.
The town specifically cites to General Statutes §§ 7-23520 and 7-24021 as support for its contention that the town and the water division are separate legal entities. Section 7-235 allows municipalities to issue revenue bonds for the construction, enlargement or maintenance of waterworks systems and provides that the municipalities are only obligated to pay the bonds from [780]*780water utility net revenue; the bonds do “not constitute a general indebtedness of such municipality within any statutory limitation.” See footnote 20 of this opinion. Section 7-240 requires municipalities to keep water utility funds separate from other municipal accounts, with no commingling, and provides that those moneys “shall be used for such waterworks system and for no other purpose.” See footnote 4 of this opinion. The town’s reliance on these statutes is misplaced.
The town’s argument is supported by neither the statutory language nor the legislative history of § 7-234 et seq. The legislature contemplated no legal distinction between the municipality and its water division; both the language and the legislative discussion focus on the responsibilities of “municipalities,” not their water divisions or water departments. See 12 H.R. Proc., Pt. 8, 1967 Sess., p. 3345, remarks of Representative A. Lucille Matarese; Conn. Joint Standing Committee Hearings, Judiciary, Pt. 2, 1967 Sess., p. 435, remarks of attorney Isaac Russell (statement supporting enactment). Moreover, the statutory language and the available legislative history indicate that these statutes solely govern municipal water utility financing, and, therefore, cannot be construed as diminishing municipalities’ public health or environmental protection responsibilities. Representative David H. Neiditz, sponsor of the bill that was enacted as 1967 Public Acts, No. 780, and codified as General Statutes (Cum. Sup. 1967) § 7-234, stated that “generally modemiz[ing] the statutes in an area of water and sewer bonding ... is such an important area today when we are concerned with water pollution.” (Emphasis added.) Conn. Joint Standing Committee Hearings, supra, pp. 394-95. We, therefore, do not read these statutes as evincing any legislative desire to deem municipalities and their water divisions to be separate legal entities, especially where such a con[781]*781struction would frustrate the goal of protecting the drinking water supply.22
We also agree with the department’s contention that treating the town and its water division as separate entities would create an invitation for the town to frustrate the legislature’s intent and avoid the department’s regulatory jurisdiction by transferring the classified land to otherwise “exempt” divisions. The courts of this state have never countenanced the tactic of avoiding regulation via organizational “ ‘Balkanization.’ ” Commission on Hospitals & Health Care v. Lakoff 214 Conn. 321, 332, 572 A.2d 316 (1990) (rejecting restrictive interpretation of General Statutes § 19a-145, now § 19a-630, defining “ ‘health care facility or institution’ ” where that “reading . . . would enable providers of health care services to avoid regulation by the commission by the mere juggling of corporate entities or careful allocation of services to different operations. Such ‘Balkanization’ of inherently unitary health services can only chip away at the commission’s authority in this vitally important area of service to Connecticut’s citizens.”); see also General Telephone Co. of the Southwest v. United States, 449 F.2d 846, 855 (5th Cir. 1971) (“[w]here the statutory purpose could thus be easily frustrated through the use of separate corporate entities, the Commission is entitled to look through corporate form and treat the separate entities as one and [782]*782the same for purposes of regulation”).23 We, therefore, conclude that the trial court correctly determined that the town government is a municipal “water company” whose land is subject to the department’s jurisdiction under § 25-32.
The judgment is affirmed.
In this opinion BORDEN and VERTEFEUILLE, Js., concurred.