Thirty-year monitoring of s-triazine herbicide contamination in the aquifer north of Vicenza (north-east Italy).

The aquifer north of Vicenza, Italy, is one of the main and most studied drinking water reservoirs within the Veneto region. The area is an intensive cropland, and monitoring of s-triazine herbicides and metabolites has been carried out since the late eighties. This study analysed the trends of atrazine (ATR), terbuthylazine (TBZ), deethyl-atrazine (DEA), and deethyl-terbuthylazine (DET) concentrations from 1987 to 2016 and related the variations of agricultural land use, herbicide load, and pesticide regulations to the residence time of pollutants in the aquifer.

Terbuthylazine contamination of the aquifer north of Vicenza (north-east Italy).

Background And Goal: Agricultural practices can affect the quality of aquifers given that they are often located in cropped areas, so significant amounts of pesticides can be found in the water. In particular, triazine herbicides are always carefully checked by the official monitoring systems. The goal of this study was to find the mean concentration of terbuthylazine in an Italian aquifer and to set up a mass balance of this compound.

Time trends of 1,1,1-trichloroethane, trichloroethylene, and perchloroethylene in confined and unconfined aquifers of a groundwater system in northern Italy.

The concentrations of 1,1,1-trichloroethane, trichloroethylene, and perchloroethylene were recorded in a groundwater system of Northern Italy over the period 1985-1997. In the unconfined recharging aquifer these chemicals showed a remarkable overall decline which was accompanied by a five-fold reduction in their consumption (from approx. 250 to approx.