Levels of pollutants in runoff water from roads with high traffic intensity in the city of Gdansk, Poland

Analyses of samples of runoff waters collected from the principal arterial roads in the city of Gdansk at sites characterised by heavy traffic are des cribed in this study. Collection of the samples was carried out over a six month period, during rain events or directly after such events. Concentrati ons of the following analytes were determined: nitro-, chloro-, and phospho roorganic pesticides, volatile halogenoorganic compounds, petroleum hydroca rbons, as well as cations (Na+, K+, NH4+, Ca2+) and anions (F-, Cl-, NO2-, NO3-, PO43-, SO42-). Additionally, total parameters such as toxicity and pH were also measured. The results permitted us to correlate the presence and concentration of the individual analytes with the pollution sources and ev aluating the influence of the local emission sources on the degree of pollu tion in the area covered by this study. The analyses performed have confirm ed the high pollution level in the runoff waters (from the arterial roads) and a necessity to establish a system of continuous monitoring of the conce ntration levels of toxic chemical compounds present in these waters. A corr elation was also found between the toxicity and concentration levels of the aforementioned groups of analytes.