(1) If an action to abate a public nuisance is brought by a private citizen, whether or not the attorney general or prosecuting attorney intervenes, and the court finds that there was no reasonable ground or cause for the action, costs may be taxed against such citizen. In such a case, attorney’s fees are proper costs.

    (2) When the attorney general or prosecuting attorney intervenes, the costs incurred by such officer shall be payable by the county in which the nuisance exists and all costs collected in the action shall be paid into the treasury of such county.