Y pedair lefel a gyflwynwyd yw:Lefel 1/Risg Isel: Dyma’r lefel cyfyngiadau agosaf at normalrwydd sy’n bosibl tra mae cyfraddau heintio yn isel a mesurau ataliol eraill ar waith.Lefel 2/Risg Ganolig: Mae’r lefel hon yn cynnwys mesurau rheoli ychwanegol i gyfyngu ar ledaeniad y coronafeirws. Gall y rhain gael eu hategu gan gyfyngiadau lleol wedi’u targedu’n fwy, a roddir ar waith i reoli mannau problemus o ran yr haint neu achosion lluosog neu frigiadau penodol.Lefel 3/Risg Uchel: Dyma’r cyfyngiadau llymaf heblaw am gyfnod atal byr neu gyfnod clo. Mae’n ymateb i lefelau heintio uwch neu gynyddol lle nad yw camau gweithredu lleol yn effeithiol mwyach o ran cyfyngu ar dwf y feirws.Lefel 4/Risg Uchel Iawn: Byddai cyfyngiadau ar y lefel hon yn cyfateb i reoliadau’r cyfnod atal byr neu’r cyfnod clo. Gellid defnyddio'r rhain naill ai fel cyfnod atal byr drwy weithredu ymlaen llaw, neu fel mesur cyfnod clo brys os nad yw rhybudd ymlaen llaw yn bosibl.
The following four levels that have been introduced are:Level 1/Low Risk: This represents the level of restriction closest to normality which are possible while infection rates are low and preventative measures in place.Level 2/Medium Risk: This includes additional controls to limit the spread of coronavirus. These may be complemented by more targeted local restrictions put in place to manage hotspots or specific incidents or outbreaks.Level 3/High Risk:These represent the strictest restrictions short of a firebreak or lockdown. This responds to higher or rising level of infections where local actions are no longer effective in containing the growth of the virus.Level 4/Very High Risk:Restrictions at this level would be equivalent to the ‘firebreak’ regulations or lockdown. These could either be deployed as a ‘firebreak’ by doing so in advance, or as an emergency ‘lockdown’ measure if advance notice is not possible