The US National Environmental Health Association e-learning page [external link] is sponsored by the Center for Disease Control and Prevention (CDCP). This page includes a link to the EH101 online course, which is an entry level course for those who may be new to the topic of EPHT. To participate you will have to register and we've already established access rights for HPA colleagues and others.
If you have any problems registering please get in touch with one of the EPHT team.