Covello, J.
This is an appeal from a decision of the Superior Court dismissing the administrative appeals from two rate determinations of the defendant department of public utility control (DPUC). The issues on appeal are: (1) whether the DPUC may establish rates that do not precisely correlate with the cost of water service in a given district in order to equalize rates between two water districts; (2) whether the DPUC may reopen a rate proceeding on its own motion; and (3) whether the DPUC was required to notify Greenwich ratepayers about proceedings for approval of the acquisition of a water company when the costs associated with the acquisition were later shared in part by the Greenwich ratepayers.
[123]*123The defendant Connecticut-American Water Company (company) is a public service utility company regulated by the DPUC pursuant to General Statutes § 16-1 et seq. The company was created in 1977 by a merger of the Mystic and Noroton water companies with the Greenwich Water Company. The company as merged provides service to approximately 24,000 customers in two distinct geographic districts. The Greenwich district includes the town of Greenwich and the Noroton section of Darien, while the Mystic district includes the towns of Stonington and Groton.
On December 16, 1986, the company applied to the DPUC for a “Phase I” rate increase and for permission to amend its rate schedules pursuant to General Statutes § 16-19. The company claimed that the amended rates were necessary to cover increased costs, maintenance and improvements. The DPUC held public hearings during March and April, 1987. On June 2, 1987, the DPUC issued a decision finding that customers in the Mystic district were paying 128 percent more than Greenwich-Noroton customers for the same volume of water and authorizing a 7 percent overall rate increase that was to be generated solely by an 8.8 percent increase in the Greenwich district rates. The Mystic rates were to remain unchanged. The DPUC denied the company’s requested “Phase II”1 rate increase but indicated that it “would entertain a request to re-open this [June 2,1987] Decision” and, if the company did not request a reopening, the DPUC stated that it would reopen the decision on its own authority.
The plaintiffs appealed this decision to Superior Court. On January 4, 1988, the DPUC, on its own motion, reopened its June 2,1987 decision. The DPUC again conducted public hearings and, on April 19,1988, [124]*124authorized the company to institute a new rate schedule that was higher than the “Phase I” schedule.
On May 16,1988, the plaintiffs appealed the second DPUC decision to Superior Court claiming that the equalization plan was improper, that the rate increases were arbitrary and capricious, that the DPUC lacked the authority to reopen a prior decision on its own authority, and that the DPUC had failed to provide proper notice to Greenwich customers of the company’s plans to acquire the Mystic water company. The trial court consolidated the appeals from the first and second DPUC decisions. On May 2, 1990, the trial court rendered judgment sustaining the decision of the DPUC on all issues and dismissing the appeals. The plaintiffs appealed to the Appellate Court. We thereafter transferred the appeal to ourselves in accordance with Practice Book § 4023 and now affirm the trial court’s judgment.
I
The plaintiffs’ first claim is that the DPUC was without statutory authority to initiate a rate equalization plan, between the Greenwich and Mystic districts, permitting the company to raise selectively the rates of discrete classes of customers. The gravamen of the plaintiffs’ claim is that the authority of the DPUC, as an administrative agency, is limited to those powers expressly granted it by statute. State v. White, 204 Conn. 410, 418-19, 528 A.2d 811 (1987). Because the statutes do not expressly permit the DPUC to equalize rates between different districts served by one company, the plaintiffs argue that the agency’s action was in excess of its statutory authority and therefore invalid. The plaintiffs also argue that the general policy underlying the enabling statute, and reflected in the prior practice of the DPUC, is to require customers to [125]*125pay only the costs associated with the services provided to them and to provide a reasonable rate of return on the owners’ capital investment, not to equalize rates between different districts.2
General Statutes § 16-19a states, in pertinent part, that the DPUC shall “determine whether the rates of each . . . company are unreasonably discriminatory or more or less than just, reasonable and adequate, or that the service furnished by such company is inadequate to or in excess of public necessity and convenience . . . .” General Statutes § 16-19e (a) (4) states, in part, “that the level and structure of rates [shall] be sufficient, but no more than sufficient, to allow public service companies to cover their operating and capital costs, to attract needed capital and to maintain their financial integrity, and yet provide appropriate protection to the relevant public interests, both existing and foreseeable.” The authority of the DPUC thus described is consistent with the expression of legislative intent found in General Statutes § 16-11, which states: “The general purposes of . . . [section] 16-19 . . . are to assure to the state of Connecticut its full powers to regulate its public service companies, to increase the [126]*126powers of the department of public utility control and to promote local control of the public service companies of this state, and said [section] shall be so construed as to effectuate these purposes.”3
The DPUC’s enabling statute thus evinces a legislative intent to rely on the DPUC to regulate and supervise public utilities, and to establish rates that are not unreasonable. The legislature, however, has not imposed upon the DPUC any specific formula or policy to use in setting rates.4 In view of the remedial purpose of the statute, the lack of an express statutory formula and the evident legislative intent to rely on the DPUC’s expertise, we conclude that the language of the enabling statute is sufficiently flexible to permit the DPUC to create necessary policies, including rate equalization, to guide its rate-making decisions.
The plaintiffs claim, however, that rate equalization is arbitrary, unreasonable and contravenes the statute because it is inherently discriminatory and because the [127]*127statute requires that rates be set only with regard to the cost of service and the need to attract capital. We disagree.5
The plaintiffs argue that equalization is arbitrary and discriminatory because it unfairly imposes a disproportionate rate increase on a given district without regard to the cost of service to that district. A decision to establish any rate in a multi-service environment inevitably results in the same rate for different ratepayers whose actual costs of service may differ. For example, in a single community there will inevitably be differences in the cost of service to ratepayers on different streets or in different residences. Furthermore, the statute nowhere requires that the DPUC base its cost analysis at the city or district level.
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Covello, J.
This is an appeal from a decision of the Superior Court dismissing the administrative appeals from two rate determinations of the defendant department of public utility control (DPUC). The issues on appeal are: (1) whether the DPUC may establish rates that do not precisely correlate with the cost of water service in a given district in order to equalize rates between two water districts; (2) whether the DPUC may reopen a rate proceeding on its own motion; and (3) whether the DPUC was required to notify Greenwich ratepayers about proceedings for approval of the acquisition of a water company when the costs associated with the acquisition were later shared in part by the Greenwich ratepayers.
[123]*123The defendant Connecticut-American Water Company (company) is a public service utility company regulated by the DPUC pursuant to General Statutes § 16-1 et seq. The company was created in 1977 by a merger of the Mystic and Noroton water companies with the Greenwich Water Company. The company as merged provides service to approximately 24,000 customers in two distinct geographic districts. The Greenwich district includes the town of Greenwich and the Noroton section of Darien, while the Mystic district includes the towns of Stonington and Groton.
On December 16, 1986, the company applied to the DPUC for a “Phase I” rate increase and for permission to amend its rate schedules pursuant to General Statutes § 16-19. The company claimed that the amended rates were necessary to cover increased costs, maintenance and improvements. The DPUC held public hearings during March and April, 1987. On June 2, 1987, the DPUC issued a decision finding that customers in the Mystic district were paying 128 percent more than Greenwich-Noroton customers for the same volume of water and authorizing a 7 percent overall rate increase that was to be generated solely by an 8.8 percent increase in the Greenwich district rates. The Mystic rates were to remain unchanged. The DPUC denied the company’s requested “Phase II”1 rate increase but indicated that it “would entertain a request to re-open this [June 2,1987] Decision” and, if the company did not request a reopening, the DPUC stated that it would reopen the decision on its own authority.
The plaintiffs appealed this decision to Superior Court. On January 4, 1988, the DPUC, on its own motion, reopened its June 2,1987 decision. The DPUC again conducted public hearings and, on April 19,1988, [124]*124authorized the company to institute a new rate schedule that was higher than the “Phase I” schedule.
On May 16,1988, the plaintiffs appealed the second DPUC decision to Superior Court claiming that the equalization plan was improper, that the rate increases were arbitrary and capricious, that the DPUC lacked the authority to reopen a prior decision on its own authority, and that the DPUC had failed to provide proper notice to Greenwich customers of the company’s plans to acquire the Mystic water company. The trial court consolidated the appeals from the first and second DPUC decisions. On May 2, 1990, the trial court rendered judgment sustaining the decision of the DPUC on all issues and dismissing the appeals. The plaintiffs appealed to the Appellate Court. We thereafter transferred the appeal to ourselves in accordance with Practice Book § 4023 and now affirm the trial court’s judgment.
I
The plaintiffs’ first claim is that the DPUC was without statutory authority to initiate a rate equalization plan, between the Greenwich and Mystic districts, permitting the company to raise selectively the rates of discrete classes of customers. The gravamen of the plaintiffs’ claim is that the authority of the DPUC, as an administrative agency, is limited to those powers expressly granted it by statute. State v. White, 204 Conn. 410, 418-19, 528 A.2d 811 (1987). Because the statutes do not expressly permit the DPUC to equalize rates between different districts served by one company, the plaintiffs argue that the agency’s action was in excess of its statutory authority and therefore invalid. The plaintiffs also argue that the general policy underlying the enabling statute, and reflected in the prior practice of the DPUC, is to require customers to [125]*125pay only the costs associated with the services provided to them and to provide a reasonable rate of return on the owners’ capital investment, not to equalize rates between different districts.2
General Statutes § 16-19a states, in pertinent part, that the DPUC shall “determine whether the rates of each . . . company are unreasonably discriminatory or more or less than just, reasonable and adequate, or that the service furnished by such company is inadequate to or in excess of public necessity and convenience . . . .” General Statutes § 16-19e (a) (4) states, in part, “that the level and structure of rates [shall] be sufficient, but no more than sufficient, to allow public service companies to cover their operating and capital costs, to attract needed capital and to maintain their financial integrity, and yet provide appropriate protection to the relevant public interests, both existing and foreseeable.” The authority of the DPUC thus described is consistent with the expression of legislative intent found in General Statutes § 16-11, which states: “The general purposes of . . . [section] 16-19 . . . are to assure to the state of Connecticut its full powers to regulate its public service companies, to increase the [126]*126powers of the department of public utility control and to promote local control of the public service companies of this state, and said [section] shall be so construed as to effectuate these purposes.”3
The DPUC’s enabling statute thus evinces a legislative intent to rely on the DPUC to regulate and supervise public utilities, and to establish rates that are not unreasonable. The legislature, however, has not imposed upon the DPUC any specific formula or policy to use in setting rates.4 In view of the remedial purpose of the statute, the lack of an express statutory formula and the evident legislative intent to rely on the DPUC’s expertise, we conclude that the language of the enabling statute is sufficiently flexible to permit the DPUC to create necessary policies, including rate equalization, to guide its rate-making decisions.
The plaintiffs claim, however, that rate equalization is arbitrary, unreasonable and contravenes the statute because it is inherently discriminatory and because the [127]*127statute requires that rates be set only with regard to the cost of service and the need to attract capital. We disagree.5
The plaintiffs argue that equalization is arbitrary and discriminatory because it unfairly imposes a disproportionate rate increase on a given district without regard to the cost of service to that district. A decision to establish any rate in a multi-service environment inevitably results in the same rate for different ratepayers whose actual costs of service may differ. For example, in a single community there will inevitably be differences in the cost of service to ratepayers on different streets or in different residences. Furthermore, the statute nowhere requires that the DPUC base its cost analysis at the city or district level. The DPUC relying upon its expertise and after a thorough review of the evidence, has decided to equalize rates between districts. We conclude that there is nothing in the statute to compel the conclusion that equalizing rates at this level is unreasonably discriminatory as a matter of law and we are therefore unwilling to disturb the decision of the DPUC.6
[128]*128II
The plaintiffs next argue that the DPUC exceeded the scope of its authority in reopening the rate hearings to consider the company’s “Phase II” request. In the June 2,1987 decision regarding the “Phase I” rate request, the DPUC said that it would “entertain a request to reopen” the decision and, in the absence of such a request, would reopen the decision on its own motion. On November 19, 1987, the company made such a request, to which the plaintiffs objected. The DPUC thereafter decided, upon its own motion, to reopen the hearings. The plaintiffs argue that it is beyond the powers set out to the DPUC in General Statutes § 16-19h to reopen a decision in this manner.
General Statutes § 16-19h provides, in pertinent part, that the DPUC may reopen a proceeding on a proposed rate amendment “to reflect the increased cost of (1) water purchased from another such water company or a municipal utility furnishing water, if such increased cost results from the approval by the department or the legislative body of the municipality . . . [or] (2) electricity purchased from an electric public service company or a municipal utility furnishing electricity, if such increased cost results from the approval by the department or the legislative body of the municipality . . . .” The plaintiffs argue that when a statute thus lists specific circumstances under which an action may be taken, there is an implied prohibition against taking the action under other circumstances.
[129]*129Section 16-19h, however, governs only the reopening of rate proceedings involving companies “which [supply] water to not more than two hundred fifty service connections or one thousand persons . . . .’’The trial court found that the company here supplies water to 80,000 people in the state. By its terms, therefore, the statute does not apply to this case. Because “it is not the province of a court to supply what the legislature chose to omit”; Federal Aviation Administration v. Administrator, 196 Conn. 546, 550, 494 A.2d 564 (1985); we decline to interpret § 16-19h as a limitation on the general power of the DPUC to reopen rate cases not otherwise subject to § 16-19h.
Further, General Statutes § 16-9 provides in part that the DPUC “may, at any time, for cause shown, upon hearing had after notice to all parties in interest, rescind, reverse or alter any decision, order or authorization by it made.” (Emphasis added.) This statute explicitly gives the DPUC significant discretion in deciding when and how to modify its orders. Mazzola v. Southern New England Telephone Co., 169 Conn. 344, 366 n.20, 363 A.2d 170 (1975). Because the statute expressly permits the DPUC to modify or alter prior decisions “at any time, for cause shown,” and because there is no express limitation on the power of the DPUC to reopen rate cases upon its own motion, we decline independently to restrict the power of the DPUC to reexamine utility rates in a subsequent proceeding.7
The plaintiffs claim, however, that even if the “Phase II” application was properly reopened, the DPUC acted contrary to law in approving it. The plaintiffs state that [130]*130the DPUC’s first or “Phase I” decision required that only those costs associated with already completed construction be included with the “Phase II” rate application, and that when the application was reopened construction had not yet been completed. The plaintiffs also claim that the application should have been rejected because the company did not amend its application following the completion of construction pursuant to § 16-1-58 of the Regulations of Connecticut State Agencies.
Section 16-1-58 of the regulations, however, applies to the amending of a pending rate application before the DPUC has issued a decision and not to the reopening of an existing DPUC decision. The regulation is, therefore, inapplicable. Further, the first or “Phase I” decision of the DPUC stated only that the DPUC would reconsider permitting a rate increase “upon completion of the Phase II construction.” Although the case was reopened before the completion of construction, the DPUC decision permitting the rate increase was not issued until after construction was completed and therefore the terms of the initial decision were met.8
Ill
The plaintiffs’ final claim is that the DPUC failed to give the town of Greenwich notice of the 1986 hearing at which the company was given permission to purchase the failing Lebanon Water Company. Pursuant to the DPUC order, the Lebanon company was merged into the Mystic district. As a result of the equalization order, [131]*131Greenwich is now paying some of the costs of absorbing the failing water company. The plaintiffs argue that General Statutes § 16-199 mandates that the DPUC provide customers with notice and an opportunity to be heard at any acquisition hearing that may adversely affect their utility rates.
The gravamen of the plaintiffs’ claim is that the failure of the DPUC to give notice to Greenwich customers pursuant to § 16-19 constitutes a jurisdictional defect. Section 16-19, however, applies only to hearings involving rate increases. General Statutes §§ 16-262o through 16-262q10 control the acquisition and disposition of fail[132]*132ing water companies. Nothing in these sections requires the DPUC to notify customers in the event of such an acquisition. In the absence of an express jurisdictional notice requirement mandated by the législature, we [133]*133decline to add one and conclude, therefore, that the DPUC was under no statutory obligation to provide notice to Greenwich customers.
The judgment is affirmed.
In this opinion the other justices concurred.