1. Online First is here!

   • Clifford I. Voss, Executive EditorWilliam E. Wilson, Managing Editor

   Editor's Message Pages: 159 - 159

2. Erratum: Hydrogeology Journal (2000) 8:11–28

   Pages: 160 - 160

3. Stratigraphic and geochemical controls on naturally occurring arsenic in groundwater, eastern Wisconsin, USA

   • M. E. Schreiber
   • J. A. Simo
   • P. G. Freiberg

   ORIGINAL PAPER Pages: 161 - 176

4. Using operational data to estimate the reliable yields of water-supply wells

   • Bruce D.R. Misstear
   • Sarah Beeson

   ORIGINAL PAPER Pages: 177 - 187

5. Prediction uncertainty of plume characteristics derived from a small number of measuring points

   • H. K. French
   • S.E.A.T.M van der Zee
   • A. Leijnse

   ORIGINAL PAPER Pages: 188 - 199

6. Direct simulation of groundwater transit-time distributions using the reservoir theory

   • David Etcheverry
   • Pierre Perrochet

   ORIGINAL PAPER Pages: 200 - 208

7. CO₂-rich thermomineral groundwater in the Betic Cordilleras, southeastern Spain: Genesis and tectonic implications

   • J. C. Cerón
   • M. Martín-Vallejo
   • L. García-Rossell

   Original paper Pages: 209 - 217

8. Effects of water extraction in a vulnerable phreatic aquifer: Consequences for groundwater contamination by pesticides, Sint-Jansteen area, The Netherlands

   • Irina Gaus

   Original paper Pages: 218 - 229

9. Hydrogeologic effects on the quality of water in the Oued Issen watershed, western Upper Atlas Mountains, Morocco

   • S. Boutaleb
   • L. Bouchaou
   • P. Chauve

   Original paper Pages: 230 - 238

10. An ecosystem approach to planning for groundwater: The case of Waterloo Region, Ontario, Canada

    • D. A. Neufeld

    Original paper Pages: 239 - 250

11. Robert N. Farvolden − Pioneering contributions in Mexican hydrogeology

    • Alejandra Cortes
    • Jaime Durazo

    Profiles Pages: 251 - 253

12. Review: “Groundwater in Geologic Processes,” by Steven E. Ingebritsen and Ward E. Sanford

    • József Tóth

    REVIEW Pages: 254 - 255