title: Assessment of environmental risks to groundwater ecosystems related to use of veterinary medicinal products.
abstract: The current EU guidelines for the environmental risk assessment of veterinary pharmaceutical products (VMPs) in groundwater (GW) suggest an approach based on the comparison between the calculated concentration in GW (PECgw) and a threshold concentration of 0.1 μg/L. The latter is the upper limit of the concentration for pesticides in groundwater in the EU. If the calculated PECgwdoes not exceed the threshold, then the risk is considered acceptable. It is assumed that the concentration of 0.1 μg/L is by default safe for both humans and exposed GW organisms. On this basis, it is not clear whether the GW is recognized as an ecosystem or as a source of drinking water. Largely unrecognized biodiversity in GW is worthy of protection through the adoption of a more scientifically sound risk analysis, which should be based on the consideration of ecological criteria. Based on the evidence of their vulnerability, we propose that risk assessments of GW ecosystems should be a compulsory part of the overall risk assessment of VMPs (as well as pesticides, biocides and feed additives). Furthermore, we suggest the use of a risk quotient approach based on the PEC/PNEC ratio in which the PNEC is calculated including an additional safety factor of 10 to the calculated PNEC for surface water.
authors.affiliation: National Laboratory of Health, Environment and Food, Prvomajska 1, 2000 Maribor, Slovenia. Electronic address: boris.kolar@nlzoh.si.
authors.forename: Boris
authors.initials: B
authors.lastname: Kolar
authors.affiliation: Department of Earth and Environmental Sciences (DISAT), Università degli studi di Milano-Bicocca, piazza della Scienza, n. 1, 20126 Milano, Italy.
authors.forename: Antonio
authors.initials: A
authors.lastname: Finizio
mesh_terms: D000818:Animals; D017753:Ecosystem; D004784:Environmental Monitoring; D005060:Europe; D060587:Groundwater / Q000737:chemistry*; D006801:Humans; D010575:Pesticides / Q000032:analysis; D012016:Reference Values; D018570:Risk Assessment; D019155:Veterinary Drugs / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D010575:Pesticides; D019155:Veterinary Drugs; D014874:Water Pollutants, Chemical
keywords: Groundwater ecosystem; Risk assessment; Stygofauna; Veterinary medicines