We undertake important tests for clinicians in primary care and hospitals as well as for Ontario’s public health units. Below you will find contact information for our laboratories located across the province. Clinicians and Public Health Units can contact Customer Service for help with:
- test results
- specimen collection procedures
- applying for autofaxing
- access to medical and scientific experts for advice on test requests and results interpretation
- clarify testing acceptance criteria
- updating your contact information
- STAT and critical specimen testing
Public Health Ontario also undertakes testing for private drinking water system owners (e.g., well water, treated lake water, water from cisterns). Private drinking water test results are available by phone, in person or by mail.
Laboratory Hours of Operation
PHO’s laboratory conducts testing seven days a week.
Laboratory Customer Service(Monday–Friday, 7:30 a.m.–7 p.m. EST; Saturday 8 a.m. –3:45 p.m. EST)
Toll Free: 1-877-604-4567
After Hours Emergencies
For public health units, clinicians in primary care, hospitals, and long-term care facilities, and partner laboratories, contact our After Hours Duty Officer at 416-605-3113 or your local PHO laboratory.
Some laboratory locations are open for public well water specimen drop-off. Please check with your local PHO laboratory (below) to confirm if samples are accepted.
These hours are subject to change around statutory holidays. Please refer to notices on our webpages for specific holiday hours.
Toll Free: 1-866-282-7376
Mailing Address: P.O. Box 2100, Hamilton, ON L8N 3R5
Toll Free: 1-855-546-4745
Location: 181 Barrie Street Kingston, ON K7L 3K2
Mailing Address: P.O. Box 240, Kingston, ON K7L 4V8
Toll Free: 1-877-204-2666
102-1200 - Commissioners Rd. E., London, ON N5Z 4R3
Directions to 1200 Commissioners Road East Clinical Samples (courier deliveries and STATs)
Directions to 1200 Commissioners Road East Main Entrance for Private Citizen Water Testing Samples
Toll Free: 1-877-611-6998
Location: 750 Memorial Avenue Orillia, ON L3V OT7
Mailing Address: P.O. Box 600, Orillia, ON L3V OT7
Mailing Address: 2380 St. Laurent Boulevard, Ottawa, ON K1G 6C4
Mailing Address: P.O. Box 265, Peterborough, ON K9J 6Y8
Sault Ste. Marie
Toll Free: 1-800-263-0409
Mailing Address: 160 McDougald St, Sault Ste. Marie, ON P6A 3A8
Toll Free: 1-888-564-6917
Mailing Address: 1300 Paris Street, Suite 2, Sudbury, ON P3E 6H3
Mailing Address: 336 South Syndicate Avenue, Thunder Bay, ON P7E 1E3
Toll Free: 1-888-267-7181
Mailing Address: 67 Wilson Avenue, Timmins, ON P4N 2S5