Stormwater runoff from urban areas has been shown to contain a variety of pollutants which are often linked to the specific land use of the catchment. This research program investigated the pollutant concentrations in stormwater runoff from several sites in South-east Queensland (SEQ), in Australia. The study sites are predominantly single development lots, under 7.5 hectares (Ha) in area, with a single land-use classification that have been developed with stormwater treatment measures to manage pollutant loads as required by local regulations. The testing program also analysed the nitrogen composition in the catchment runoff samples (prior to treatment) during storm events and compared them to current Australian guidelines. The results to date (n = 320) have shown pollutant concentrations to be significantly lower than those historically published as typical for Australian land uses (p < 0.05). Ongoing application of out-dated influent values as part of development assessment processes could potentially provide inaccurate results, incorrectly sized and under-performing treatment measures. This current research also suggests that nitrogen in runoff from lot-scale, urban residential catchments has average nitrogen oxides (NOx) ~ 16% and ammonia ~ 9% as percentage of total nitrogen (TN). Total Kjeldahl nitrogen (TKN) forms on average ~ 84% of the total nitrogen concentration during events. Where it was previously recommended that to achieve water quality targets of 45% total nitrogen load reduction, treatment measures targeting NOx were required (e.g. Vegetated systems), this latest research indicates that solutions removing organic nitrogen also may be necessary, increasing the options available to designers.

研究表明，城市地区的雨水径流含有多种污染物，这些污染物通常与流域的特定土地用途有关。该研究计划调查了澳大利亚昆士兰州东南部（SEQ）多个地点雨水径流中的污染物浓度。研究地点主要是单个开发区，面积不到7.5公顷（Ha），具有单一土地用途分类，并已通过雨水处理措施进行了开发，以根据当地法规要求管理污染物负荷。该测试程序还分析了暴风雨期间流域径流样品（处理之前）中的氮成分，并将其与当前的澳大利亚指南进行了比较。迄今为止的结果（n = 320）表明污染物浓度明显低于历史上公布的澳大利亚土地使用的典型浓度（p <0.05）。在开发评估过程中不断应用过时的进水值可能会导致结果不准确，规模不正确以及治疗措施表现不佳。这项当前的研究还表明，规模规模的城市居民流域径流中的氮以平均氮（TN）的百分比形式存在，平均氮氧化物（NOx）〜16％，氨〜9％。在事件期间，凯氏总氮（TKN）平均约占总氮浓度的84％。以前曾建议要实现将总氮负荷降低45％的水质目标，则需要针对NOx的处理措施（例如