There are many ways to monitor water conditions. Monitoring specialists sample the chemical conditions of water, sediments and fish tissue to determine levels of key constituents such as dissolved oxygen, nutrients, metals, oils, and pesticides. They also monitor physical conditions such as temperature, flow, sediments, and the erosion potential of stream banks and lake shores. Biological measurements of the abundance and variety of aquatic plant and animal life and the ability of test organisms to survive in sample water are also widely used to monitor water conditions. Monitoring can be conducted at regular sites (“fixed stations”) on a continuous basis at selected sites on an as-needed basis, to answer specific questions, or to characterize a watershed on a temporary or seasonal basis (for example, during the summer at bathing beaches) at random sites throughout an area or state or on an emergency basis (such as after a spill). Increasingly, monitoring efforts are aimed at determining the condition of entire watersheds the area drained by rivers, lakes, and estuaries. This is because we have come to realize the impact of land-based activities on the waters that drain the land, and the interconnectedness of all types of waterbodies, including those beneath the ground. Below are the different types and application Greentech is providing the solutions.