At issue in this appeal is whether the city of Brock-ton must pay an award of double damages under G. L. c. 93A in a construction contract case that was decided, over the city’s objection, by an arbitrator. Although we reject the city’s contention that the arbitration agreement cannot be read to authorize arbitration of a c. 93A claim, we nevertheless conclude that the award must be vacated as beyond the arbitrator’s authority because it is contrary to principles of sovereign immunity and, hence, against public policy.

*279Background. Undertaking to build a new municipal building to house its council on aging,1 the city entered into a written construction contract with the plaintiff, M. O’Connor Contracting, Inc., whereby the plaintiff would receive $1,344,500 for its work on the project. The contract included the following “Supplementary General Condition” relating to arbitration:

“U. Damages

Should either party to the Contract suffer damages because of any wrongful act or neglect of the other party . . . claim shall be made in writing to the party liable within a reasonable time of the first observance of such damage and no later than the final payment. . . and shall be adjusted by agreement or arbitration.”

Another Supplementary General Condition, paragraph Q, provided that such claims would be heard by the American Arbitration Association.

As the project neared completion, a dispute arose between the parties. The plaintiff claimed that it was owed a balance of $101,685.95 for work performed under the contract. The city refused to pay, citing deficiencies in the work. Viewing the city’s refusal to pay as unjustified and, hence, giving rise to a “claim” for “damages because of any wrongful act” within the meaning of the above arbitration clause, the plaintiff filed a demand for arbitration with the American Arbitration Association. After preliminary skirmishes before the arbitrator as to whether arbitration was the appropriate forum for the dispute,2 the city refused to participate. On October 5, 2001, the plaintiff therefore went to court, pursuant to G. L. c. 251, § 2(a), *280and moved to compel arbitration of (1) its claim for the balance allegedly owed under the contract, and (2) a claim for double or treble damages under G. L. c. 93A.

In response, the city opposed the arbitration generally, contending that the parties had not agreed to arbitrate any aspect of the controversy. It also requested that, at a minimum, the court strike the plaintiffs c. 93 A claim.3 A judge of the Superior Court rejected the city’s position, concluding that the arbitration clause was broad enough to include a claim for payments improperly withheld. He did not distinguish between the breach of contract and c. 93A claims and allowed the plaintiffs motion to compel arbitration as to both.

The arbitration proceeded (over the city’s protest) with the following results: the arbitrator issued an award on December 14, 2001, in favor of the plaintiff on the contract claim, which, with interest, amounted to $107,479.35; then, finding that the city “chose to ignore its obligations established under the terms of the contract” and that its “actions during the subsequent period regarding payments . . . and . . . concerning this Arbitration process” were “unfair and purposely deceptive,” the arbitrator also rendered an award of double damages on the plaintiff’s c. 93A claim. Although the award was fairly detailed in other respects (it was six pages in length), it did not address the legal sufficiency of the c. 93A claim and contained no discussion of whether the transaction arose from the city’s engagement in trade or commerce.

After the arbitration was concluded, the parties returned to the Superior Court. The plaintiff moved, pursuant to G. L. c. 251, § 11, to confirm the arbitration award and, for the first time, requested an award of costs and attorney’s fees in conjunction with its c. 93A claim. The city countered with a motion, pursuant to G. L. c. 251, § 12, to reconsider the court order compelling arbitration and to vacate the award.4 A judge differ*281ent from the one who allowed the plaintiff’s motion to compel arbitration denied the city’s motion and confirmed the award in its entirety.

The judge rejected the city’s contention that the arbitrator lacked the authority to consider and award relief on the c. 93A claim, concluding that the issue was governed by Drywall Sys., Inc. v. ZW Constr. Co., 435 Mass. 664, 666-671 (2002), which held that a statutory claim under G. L. c. 93A, § 11, including a claim for multiple damages, was within the scope of a broadly worded arbitration clause agreed to by two private construction businesses. The judge then observed that while “[t]he court might venture to agree that the city was not engaged in trade or commerce and thus not subject to G. L. c. 93A liability,” he was constrained to leave the results of the arbitration undisturbed because even a grossly erroneous arbitration decision is binding in the absence of fraud.

Discussion. The city takes the position that the arbitration clause cannot be read as an agreement to arbitrate the plaintiff’s c. 93A claim and that it therefore was error for the first judge to order that the c. 93A claim be submitted to arbitration, and for the second judge to refuse to vacate the double damages award as exceeding the arbitrator’s authority. The city’s rationale, briefly stated, is that the parties’ agreement requires that, to be arbitrable, the plaintiff’s claim must be one for damages because of a “wrongful act”5; that this language can only refer to a grievance that is capable of legal redress; and that, given the public motivation for the project, the plaintiff’s c. 93A claim against the city was not legally cognizable,6 and hence not arbitrable. In effect, the city invites us to consider the legal *282merits of the plaintiff’s c. 93A claim and to conclude that, because it fails to state a valid cause of action on the facts of this case, the parties could not have intended to arbitrate it. This we cannot do.

“[WJhere the contract contains an arbitration clause, there is a presumption of arbitrability in the sense that ‘[a]n order to arbitrate the particular grievance should not be denied unless it may be said with positive assurance that the arbitration clause is not susceptible of an interpretation that covers the asserted dispute. Doubts should be resolved in favor of coverage ....’” Local No. 1710, Intl. Assn. of Fire Fighters, AFL-CIO v. Chicopee, 430 Mass. 417, 421 (1999), quoting from AT&T Technologies, Inc. v. Communications Wkrs. of Am., 475 U.S. 643, 649 (1986). Although the clause in question is not the standard, broad clause that was at issue in Drywall Sys., Inc. v. ZVI Constr. Co., 435 Mass, at 665,7 it does not, by its terms, exclude c. 93A claims; nor does the arbitration clause, or any other part of the contract, place descriptive limits upon the matters that may be arbitrated. Compare Royal Indem. Co. v. Blakely, 372 Mass. 86, 87 n.2 (1977) (under terms of arbitration agreement in automobile insurance policy, factual questions concerning insured’s rights against owner and operator of uninsured vehicle were for arbitrator to decide, but scope and meaning of policy was for court); School Comm. of Hanover v. Hanover Teachers Assn., 435 Mass. 736, 740-742 (2002) (where collective bargaining agreement contained limiting language excluding school nurses from coverage, arbitration clause did not confer authority upon arbitrator to consider grievance involving nurses). To the contrary, a reasonable reading of the clause is that by agreeing to arbitrate claims for “damages because of any wrongful act” the parties committed themselves *283to arbitrate a wide range of disputes arising from alleged improprieties in the parties’ performance of the contract.

The city’s argument also runs afoul of the principle that, in deciding whether parties have agreed to submit a particular matter to arbitration, a court is not to rule on the potential merits of the underlying claims. See Local No. 1710, Intl. Assn. of Fire Fighters, AFL-CIO v. Chicopee, supra. It is for the arbitrator to decide whether or not the claim is supported in law and fact; and, if the arbitrator then proceeds to commit an error of law or fact, but does not overstep the limits of the issues submitted, ordinarily there is no basis for judicial intervention. See Lawrence v. Falzarano, 380 Mass. 18, 28-29 (1980); Lynn v. Thompson, 435 Mass. 54, 62 (2001), cert, denied, 534 U.S. 1131 (2002).

That being said, we remain troubled by the arbitrator’s decision. The source of our discomfort is that in the circumstances presented the award is not simply factually and legally erroneous. It also conflicts with the doctrine of sovereign immunity — a doctrine that is grounded in public policy concerns that are well-defined, dominant, and readily ascertained by reference to the laws and legal precedents and not from general considerations of supposed public interests. See School Dist. of Beverly v. Geller, 435 Mass. 223, 237-238 (2001) (Ireland, J., concurring) (articulating test used in cases arising under G. L. c. 150C, § 11, to determine whether public policy exception applies to arbitration awards issued pursuant to collective bargaining agreements).

Since the enactment of the Massachusetts Tort Claims Act, G. L. c. 258, it has been clear that governmental “immunity is still in effect unless consent to suit has been ‘expressed by the terms of a statute, or appears by necessary implication from them.’ ” Bain v. Springfield, 424 Mass. 758, 763 (1997), quoting from C & M Constr. Co. v. Commonwealth, 396 Mass. 390, 392 (1985). See Morash & Sons, Inc. v. Commonwealth, 363 Mass. 612, 623 (1973) (noting desirability of limits and exceptions to governmental liability, based upon considerations of justice and public policy); Commonwealth v. ELM Med. Labs., Inc., 33 Mass. App. Ct. 71, 77-78 (1992) (observing that sovereign immunity is rooted in history and based upon sound *284considerations of public policy). Putting aside the broader question whether c. 93A may be read as waiving governmental immunity in any circumstances,8 at a minimum it is well established that governmental entities are not amenable to suit under c. 93A when they have engaged in governmental activity rather than trade or commerce. See cases cited in note 6, supra. This limitation on the c. 93A liability of governmental entities stems not only from the explicit language of the statute,9 it is bom of respect for the doctrine of sovereign immunity. See Bretton v. State Lottery Commn., 41 Mass. App. Ct. 736, 738 (1996) ; Morton v. Hanover, 43 Mass. App. Ct. 197, 205-206 (1997) . See also Broadhurst v. Director of the Div. of Employment Security, 373 Mass. 720, 722 (1977) (noting general principle that Commonwealth cannot be impleaded in its own courts except with its consent and, when that consent is granted, only in manner and to extent expressed by statute).

Here, the facts establish (and the plaintiff does not contest)

*285that the c. 93A claim against the city arose from its performance of a governmental function, i.e., contracting for the construction of a municipal building to be used solely for municipal purposes.10 Thus, the erroneous application of c. 93A to the city contravened not only the statute itself, but also fundamental principles of governmental immunity. Compounding our public policy concerns, the award was one for punitive damages11 — a form of relief particularly disfavored when assessed against a public entity. See Newport v. Fact Concerts, Inc., 453 U.S. 247, 259-271 (1981) (recounting history of municipal immunity from punitive damages and concluding, in view of considerations of history and general principles of public policy, that municipalities are not liable for punitive damages under 42 U.S.C. § 1983).12

This, then, is one of those rare cases where an arbitration award must be vacated on the ground that it offends public policy.13 Cf. Lawrence v. Falzarano, 380 Mass. at 28. We are cognizant that “because the public policy ‘doctrine allows courts to by-pass the normal heavy deference accorded to arbitration awards and potentially to “judicialize” the arbitration process, the judiciary must be cautious about overruling an arbitration award on the ground that it conflicts with public policy.’ ” Bureau of Special Investigations v. Coalition of Pub. Safety, 430 Mass. 601, 604 (2000), quoting from E.I. DuPont de Nemours & Co. v. Grasselli Employees Indep. Assn. of E. Chicago, 790 F.2d 611, 615 (7th Cir.), cert, denied, 479 U.S. 853 (1986). We also are cognizant that, in Drywall Sys., Inc. v. ZVI Constr. *286Co., 435 Mass, at 670, the Supreme Judicial Court rejected the defendant’s wholesale contention that arbitration awards of multiple damages under c. 93A violate public policy.14 Essential to the court’s decision, however, was that Drywall involved a purely private dispute between two construction businesses. The court did “not foreclose the possibility that some commercial disputes might affect public policy and might require different treatment.” Ibid. We think that an award of double damages against a municipality in contravention of well-established principles of sovereign immunity does, in fact, affect public policy and require different treatment.

Conclusion. For the reasons stated, we vacate the judgment confirming the arbitration award and direct that a new judgment enter confirming the award only to the extent that it grants relief on the plaintiff’s claim for breach of contract.15

So ordered.