Swedish monitoring data obtained for the Swedish Environmental Protection Agency (Naturvårdsverket; national data) and Sweden's counties (Länsstyrelsen; regional data). The data are available on-line at http://www.slu.se/vatten-miljo(downloading of data only in Swedish, otherwise some information on the webstie is available in English) and are stored in separate databases including one on water chemistry (Databank för vattenkemi) and Phytoplankton (växtplankton), benthic algae (Påväxtalger (Bentiska kiselalger), zooplankton (djurplankton), macroinvertebrates (bottenfauna). The monitoring is divided into frequent monitoring of water chemistry, phytoplankton and zooplankton (once a month during the open water season, referred to as Trendstationer). Monthly data during the open water season are also avaialable for Sweden's largest lakes Vänern, Vättern and Mälaren. Macroinvertebrates are only sampled once a year. The monitoring of benthic algae is seperated from the other monitoring but is currently coordinated with the phytoplankton database. There is also a large database on water chemistry from several thousands of lakes, sampled once a year (omdrevssjöar). Some data are available also for sediments and vegetation.
More information on this dataset can be found in the Freshwater Metadatabase - BFE_7 (http://www.freshwatermetadata.eu/metadb/bf_mdb_view.php?entryID=BFE_7).