Yn ystod ei arolygiad ym mis Mai 2011, gwelodd Estyn fod perfformiad gwasanaethau addysg yr awdurdod lleol yn anfoddhaol, a hefyd bod y rhagolygon o ran gwella hefyd yn anfoddhaol. Yng ngoleuni’r diffygion tra difrifol hyn, roedd Estyn o’r farn bod angen gweithredu mesurau arbennig mewn perthynas â’r awdurdod hwn. Yn ystod yr ailarolygiad a gynhaliwyd ym mis Ionawr 2013, daeth Estyn i’r casgliad eto fod perfformiad gwasanaethau addysg yr awdurdod, a’r rhagolygon o ran gwella, yn anfoddhaol, a bod angen parhau i weithredu mesurau arbennig mewn perthynas â’r awdurdod hwn.
During its May 2011 inspection, Estyn found the performance of the local authority education services to be unsatisfactory and also found the authority’s prospects for improvement to be unsatisfactory.  In light of these very serious shortcomings, Estyn believed that special measures were required in relation to this authority.  In the re-inspection in January 2013 Estyn again concluded that the performance of the education services and the authority’s prospects for improvement are unsatisfactory and that the authority continues to require special measures.