Population | Air and water samples from WWTPs |
Exposure | Locations near WWTPs, or downstream/downwind/down-gradient from this plant in a unidirectional system |
Comparator | Locations far away from WWTPs, or upstream/upwind/up-gradient from this plant in a unidirectional system |
Outcome | Prevalence or concentration of ARB or ARG, specifically from E. coli and other coliforms |