ɑːɹ juːbˈɪkwɪɾəs ɪn ɹˈɪvɚ ænd fɹˈɛʃwɔːɾɚ lˈeɪks ænd hæv fɹˈiːkwəntli bˌɪn əbzˈɜːvd ɪn dɹˈɪŋkɪŋ wˈɔːɾɚ sˈɪstəmz.
are ubiquitous in river and freshwater lakes and have frequently been observed in drinking water systems.