Jeths R2012-12-122012-12-121992-12-31http://hdl.handle.net/10029/256009Abstract niet beschikbaarThe Dutch groundwater quality monitoring network includes 390 monitoring points. The frequency of sampling is once a year. The objectives of the network are: - to make an inventory of the present quality in relation to soil use, type of soil and hydrogeological conditions; - to distinguish long term changes in quality; - to provide data for quality control and groundwater control; - to indicate the extent of human influence on groundwater quality. This report gives the results of analyusis in 1991 from 36 monitoring points in the province of Zuid-Holland.42 pnl13grondwaterkwaliteitverontreinigingmeetnetmonitoringgrondsoortmeetgegevenszuid-holland92-4national groundwater quality;groundwaterqualitypollutionmonitoring networkssoil typesdatazuid-hollandReport2012-12-12