From the US Coast Guard: Clarification Regarding UV Treatment

Recently the Coast Guard has been responding to rumors that type approval of ballast water management systems (BWMS) that incorporate ultraviolet radiation (UV) as a disinfection process will not be possible under Coast Guard type approval requirements.

These rumors are not true. The Coast Guard has made no decision regarding the general acceptability of UV as a treatment process or the specific acceptability of any UV-based BWMS for purposes of type approval under the Coast Guard’s March 2012 Ballast Water Discharge Standard Final Rule.