Phosphorus (P) is one of the key nutrient compounds for phytoplankton grow. In the conducted work, eutrophication indexes were used for the assessment of eutrophication level of water course (Służewiecki Stream) and the waters of nearby lakes (Bottom Berensewicz’s Pond, Wyścigi Pond, Wilanowskie Lake). Calculating eutrophication indexes were based on the most important indicators which is crucial for eutrophication process: total phosphorus (TP), total nitrogen (TN), chlorophyll a (Chl(a)) and water transparency. The research revealed that the concentration of phosphorus and nitrogen in the analysed waters determined intensity of trophic processes. The average concentration of both indicators was high: 0.81 mg/l TP and 6.8 mg/l TN. During this research, two approaches were used: trophic state index (TSI) and trophic level index (TLI). TSI (TP) in Służewiecki Stream were, respectively: 83 and 6.5 whilst for standing waters (lake and ponds) 87 and 6.6. Both indexes indicated high trophic state and confirmed that eutrophication is a serious endangerment for analysed surface waters. Calculated indexes used in the assessment were sufficient and effective for sustainable water protection and management of water quality in Służewiecki Stream and in standing waters.

磷 (P) 是浮游植物生长的关键营养化合物之一。在开展的工作中，富营养化指数用于评估水道（Służewiecki Stream）和附近湖泊（Bottom Berensewicz's Pond、Wyścigi Pond、Wilanowskie Lake）的水体富营养化水平。计算富营养化指标是基于对富营养化过程至关重要的最重要的指标：总磷（TP）、总氮（TN）、叶绿素 a（Chl( a)) 和水的透明度。研究表明，分析水域中磷和氮的浓度决定了营养过程的强度。两个指标的平均浓度都很高：0.81 mg/l TP 和 6.8 mg/l TN。在这项研究中，使用了两种方法：营养状态指数（TSI）和营养水平指数（TLI）。Służewiecki Stream 中的 TSI (TP) 分别为：83 和 6.5，而静水（湖泊和池塘）为 87 和 6.6。这两个指标都表明处于高营养状态，并证实富营养化对所分析的地表水来说是一个严重的危害。评估中使用的计算指标对于 Służewiecki 溪流和静水区的可持续水保护和水质管理来说是充分和有效的。