After an investigation into allegations of sexual misconduct, Alexandria human rights administrator Stephen M. Levinson has been fired, City Manager Vola T. Lawson announced yesterday.

For the past month, Levinson has been on administrative leave while city officials investigated complaints of sexual harassment that had been brought against him.

City Attorney Cyril (Des) Calley released a statement yesterday evening that said, "The city has conducted a thorough investigation and a number of serious and substantive complaints against Mr. Levinson have been lodged by employes (past, present and potential) . . . . "

It added that an investigation concluded that "various improper actions, including sex harassment and hiring improprieties, had occurred and warranted the termination."

Levinson, reached at home, declined to comment on the case. He has the right to an administrative hearing and a grievance procedure that would conclude with arbitration.

His lawyer, Philip J. Hirschkop, said last week that five complaints had been placed against his client and that all were "nonsense." Yesterday, he could not be reached for comment.

Levinson had worked for the city for five years. As human rights administrator he was responsible for ensuring that city employes were not discriminated against on the basis of race, sex or religion. He was hired by then-City Manager Douglas Harman and had previously worked as the director of human rights for the city of Worcester, Mass.

On March 21, Levinson was removed from his $42,000-a-year job and the locks were replaced on his office door after he was informed of the allegations. He remained on the payroll through Friday, when he was informed that he had been fired, according to Lawson.

Although city officials declined to discuss the particulars of his case yesterday, persons familiar with the investigation have said Levinson is accused of soliciting a sexual favor from a transsexual person in his office at 110 N. Royal St., and that after the sexual act was completed he allegedly gave the person $30. The person, a man dressed as a woman, has undergone a sex change operation since the alleged incident.