KISTERS presented its final results of the Surface Water Interoperability Experiments #1 and #3 to the Open Geospatial Consortium (OGC) in Boulder, CO this past week. The end result of this work was KiWIS (KISTERS Web Interoperability Solution), the first commercially available and robust service module on the market. Used in combination with WISKI or Hydstra, KiWIS is able to both consume and publish real-time hydrological data over the Internet (http://kiwis.kisters.de) using open standards like WaterML 2.0 and SOS. This combination can also be placed “on-top” of existing time series data archives, providing a quick and efficient method for disseminating and retrieving data from the Internet.