wastewater-surveillance
Wastewater surveillance is the monitoring of wastewater streams for biological and chemical contaminants, including pathogens, genetic material, and bioactive compounds. In plant science, this approach can reveal how agricultural runoff, soil microbiomes, and plant-associated pathogens enter water systems, offering insights into the spread of plant diseases and the environmental fate of agrochemicals. It also provides a tool for tracking emerging phytopathogens or resistance genes at a landscape scale without requiring direct sampling of individual plants.
open_in_new WikipediaPubMed · 2026-05-01
Researchers in Paris developed a model that uses everyday chemical measurements in sewage — like ammonia and phosphorus — to estimate how many people are actually using a sewer system on any given day. This lets scientists better interpret drug and virus data from wastewater, revealing trends like unprescribed medication use that would otherwise be hidden by population fluctuations.
A model using five standard chemical wastewater parameters estimated connected population sizes with a mean absolute percentage error of only ~6%, outperforming existing published models.
Population levels at monitored sites varied by a factor of three over four years, a swing large enough to seriously distort health signals if not corrected for.
Monthly viral (COVID/pathogen) monitoring proved insufficient for tracking short-term epidemics, while pharmaceutical trends after population-normalization closely matched official prescription records and revealed non-prescription drug use.