For those living, working or visiting the 10-Mile Emergency Planning Zone around Three Mile Island (TMI) today at 12:15pm TMI will test its siren system. This will be a full 3 minute siren test. Remember, the purpose of the siren is to serve as an OUTDOOR warning system to alert the public to seek information via television or radio EAS (Emergency Alert System) broadcast. Depending on your distance from the siren you may not hear it while indoors. If you believe there was a problem with a siren in your area please send an email to SCALERT@DAUPHINC.ORG and it will be reviewed and forwarded to the appropriate authority.