Contact Information

Canadian Dental Hygienists Association (CDHA)

1122 Wellington St W,
Ottawa, ON K1Y 2Y7

Phone: 1-800-267-5235 or (613) 224-5515
Fax: (613) 224-7283
E-mail: info@cdha.ca

Staff Directory

Office hours

Monday to Thursday, 8:30 am to 4:30 pm ET
Friday, 8:30 am to noon ET
Friday, 8:30 am to 4:30 pm ET during the month of October

Closed for holidays

The CDHA office will be closed for the following 2025 holidays:
Family Day: February 17
Good Friday: April 18
Easter Monday: April 21
Victoria Day: May 19
Canada Day: July 1
Civic Holiday: August 4
Labour Day: September 1
Thanksgiving Day: October 13
Christmas Day: December 25
Boxing Day: December 26
The CDHA office will be closed from Wednesday, December 24, 2025 until Thursday, January 1, 2026, inclusive, for the holiday season.