All states require verification of sterilizer function  

Most states require weekly monitoring; a few still allow monthly tests.  Check with your local Board of Dentistry for the standard of practice in your area.  Oregon, Washington and California require weekly tests.  Medical offices are required to test monthly. In Oregon, business doing electrolysis, or tattooing and piercing are also required to monitor sterilizer function on a monthly basis.

For almost 40 years, the Sterilizer Monitoring Service at the Oregon Health Sciences University (SMS) has been a source of third party biological monitoring for dental, medical and other offices.  Dental and medical offices are required by statute to verify the sterilizers used meet current standards.  In Oregon, weekly sterilizer monitoring is required for dental offices (see Section 818-012-0040 at http://arcweb.sos.state.or.us/pages/rules/oars_800/oar_818/818_012.html).  Medical offices are required to monitor sterilization equipment monthly.