Sexually Transmitted Infections Testing Clinics The only way you can know for sure if you have a sexually transmitted infection (STI) is to get tested. Some STIs do not have symptoms so you could pass them on to your partner if you don't know you're infected. Clinics are staffed by public health nurses, nurse practitioners and a clinic physician. They provide assessment, treatment, education and referral services for sexually transmitted diseases. Region of Waterloo Public Health clinics are LGBTQ (Lesbian, Gay, Bisexual, Transgender, Queer) positive and persons working in the sex trade are welcome. All services are FREE and CONFIDENTIAL. No health card is required to receive services. Call 519-883-2251. Drop-in Clinics operate on a first come, first served basis. Hepatitis B vaccine is available free of charge to individuals with sexual and/or needle sharing risk factors. Free condoms are also available. Sexually Transmitted Infections Clinic Locations and Drop-in Hours Location Time Waterloo 99 Regina St. S. 2nd floor Mondays and Thursdays 2:30 p.m. - 6:30 p.m. Cambridge 150 Main St. 1st floor, at the rear of the building Tuesdays 3 p.m. - 5 p.m. Needle exchange services are available at all public health locations. Click here for more information on needle exchange services and for a map of all locations in Waterloo Region.