| urban impact in the history of water quality in the stockholm archipelago. | from the historical perspective, the increasing number of inhabitants in the city of stockholm has had a negative effect on water quality in the surrounding lakes and coastal region. government control and measures taken to improve water quality have been in progress since the mid-19th century. water conditions in the 19th century, compared to later years is difficult to assess from the first chemical and biological investigations, due to infrequent sampling and the different parameters and meth ... | 2001 | 11697262 |