A notice of violation documents a violation of an NPDES permit. It frequently is in the form of a letter by the Division of Water Quality. It merely gives notice that there has been a violation, and sometimes, there may be a penalty attached. It may take a different form depending on the circumstances. Just look for anything that discusses specific violations as this is important information in terms of assessing whether a particular discharger is polluting a river and whether the division took appropriate action.