The company has since apologised on Facebook to the pedestrians affected and described the driver's behaviour as "unacceptable".
It also said the driver was "no longer employed" with the company, which is based in nearby Toronto.
Police in Ottawa confirmed they were looking into the incident and that although there is no by-law or offence in the province of Ontario for splashing a pedestrian, drivers could face a "mischief" charge if intent could be proved.
A police sergeant with Ottawa's traffic services section, Mark Gatien, later confirmed that the force would not be taking any action against the driver after learning they had been dismissed.
He told the Ottawa Sun newspaper that the force felt the loss of employment was a sufficient punishment.
"We consider the file now closed," he said. "The outcome from the employer we feel is enough of a lesson learned for him and your readers and viewers."