-FAILURE TO SAMPLE AND TEST ITS WATER FOR CONTAMINATION BY COLIFORM BACTERIA. -EXCEEDING THE MCL. -FAILURE TO PERFORM CHECK-SAMPLING FOLLOWING UNSATISFACTORY SAMPLE RESULTS. -FAILURE TO REPORT TO EPA WITHIN 48 HOURS THE FAILURE TO COMPLY WITH ANY NATIONAL PRIMARY DRINKING WATER REGULATION. -FAILURE TO GIVE PUBLIC NOTICE OF ITS FAILURE TO COMPLY WITH AN APPLICATIONS TESTING PROCEDURE.