On the scope and management of pesticide pollution of Swedish groundwater resources: The Scanian example

Abstract

Twenty-three south-Swedish public supply wells were studied to assess pesticide pollution of regional groundwater resources. Relations between pesticide occurrence, hydrogeology, and land use were analyzed using Kohonen's Self-Organizing Maps approach. Pesticides are demonstrated to be substantially present in regional groundwater, with detections in 18 wells. Concentrations above the drinking water threshold are confirmed for nine wells. Observations indicate considerable urban influence, and lagged effects of past, less restricted use. Modern, oxic waters from shallow, unconfined, unconsolidated or fracture-type bedrock aquifers appear particularly vulnerable. Least affected waters appear primarily associated with deeper wells, anoxic conditions, and more confined sediment aquifers lacking urban influence. Comprehensive, standardized monitoring of pesticides in groundwater need to be implemented nationwide to enable sound assessments of pollution status and trends, and to develop sound groundwater management plans in accordance with the Water Framework Directive. Further, existing water protection areas and associated regulations need to be reassessed.

A review of contamination of surface-, ground-, and drinking water in Sweden by perfluoroalkyl and polyfluoroalkyl substances (PFASs)

“…The PFAS problem and the shortcomings when it comes to groundwater quality monitoring are exemplary for the general monitoring situation in Sweden, which was criticized by the EU commission (European Commission 2012 ) and that urgently should be improved. As stated above, there are too many authorities partly responsible for monitoring today and coordination is highly insufficient (Åkesson et al 2015 ; Augustsson et al 2016 ). One single authority should be designated to have the overall responsibility for water monitoring, which was also suggested by a recent governmental report (Regeringskansliet 2016 ).…”

Managing water services in tropical regions: From land cover proxies to hydrologic fluxes

“…For example, if nitrate pollution in drinking water is caused by nitrate released from legacy stores in the subsurface, or leaking septic tanks close to wells, and subsequently carried downstream, then managing nitrate inputs upstream will not alleviate the problem (Destouni et al 2010;Å kesson et al 2014). However, focusing on key local fluxes affected by an intervention program ensures that, at the very least, broadscale effectiveness of the program can be assessed.…”

Bilateral fluctuation asymmetry of otoliths of Collichthys lucidus in different functional areas of Haizhou Bay

“…(2020). There are two main factors affecting the occurrence of FA otoliths in fish: genetic factors and environmental pressure factors (Bengtsson & Hindberg, 1985; Jawad et al ., 2012b; Newman & Clements, 2008). These data also provided a good basis on which to analyse the FA changes of C. lucidus otoliths in different body lengths (corresponding to genetic factors and natural selection) and functional areas (corresponding to different environmental changes), as well as genetic differences between sites.…”