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Total Data
Points collected
Total Number
of Experiments
Each Experiment
Duration (mins)
Total Number
of Locations

Stations (Geographic Distribution)

Parameters Measured during each boat ride

Based on the CPCB guidelines, the range of pH for surface water should be between 6.5 and 8.5. The pH exceeding the range might affect aquatic life, especially the adult fishes, as it may cause damage to the outer part including gills and eyes.
Dissolved Oxygen [ppm]
An adequate supply of oxygen in dissolved form is essential for the survival of aquatic life. Hence, DO is considered as an indicator of aquatic health. Concentration of DO also determines the changes made by abiotic or biotic organisms and hence measurement of DO is essential. A rapid fall in the DO levels indicates high organic pollution in the river.
Temprature [°C]
Temperature of the surface water.
Turbidity [FNU]
Turbidity is a measure of the degree to which the water loses its transparency due to the presence of suspended particulates. The more total suspended solids in the water, the murkier it seems and the higher the turbidity.
Electrical Conductivity [µS/cm]
Electrical conductivity (EC) is the amount of ions present in the water. It also indicates the amount of total dissolved solids and both of these are positively correlated i.e. more dissolved solid indicates more electrical conductivity. If the water is used for drinking and other domestic uses high EC can cause the laxative effect, however since drinking water is also a source of major ions in the human body and hence low EC might cause deficiency of ions.
Ammonia Concentration [ppm]
Common sources are agricultural run-off, industrial wastes.
Nitrate Concentration [ppm]
Common sources are agricultural runoff, industrial wastes and sewages
CDOM [ppb]
CDOM are a mixture of colored organic compounds essential for the biochemical cycle in the freshwater. These are also called yellow substances. They control the nutrient availability, light penetration and ecosystem productivity. High CDOM inhibits the growth of phytoplankton resulting in decrease in DO.
chlorophyll-a [ppb]
Chlorophyll-a is the photosynthetic pigment responsible for the green color of the plant leaves and algal biomass. The concentration of Chlorophyll-a directly indicates the amount of photosynthetic community or algae in the water. Existence of chlorophyll-a concentration in phytoplankton and the phytoplankton spectra reflectance is related to the optical activity of the pigment, the composition and appearance of the algal cells.
Tryptophan [ppb]
The protein in the cell wall of microbes has similar fluoresces like amino acids i.e. “Tryptophan” and hence tryptophan like fluorescence is used to measure the microbial health, fecal coliform concentration and BOD of surface water.

Parameters measured in the labratory

Chemcal Oxygen Demand
Chemical oxygen demand (COD) is the amount of oxygen utilized for chemical oxidation of organic waste to inorganic end products. It is an indicative measure of the amount of oxidizable organic pollutant in water.
Bio-chemical Oxygen Demand
BOD is a measure of determining the requirement of oxygen needed by the aerobic micro- organism to stabilize the household and industrial wastes. To stabilize these organic wastes the minimum DO level should be 2-7 mg/L then only the BOD can be estimated in Laboratory condition at fixed temperature i.e. 20 °C for 5 days.
Fecal and Total Coliform
Fecal coliform (FC) in the waste water mainly results from human or animal excreta. However, the waste from paper and pulp mills, plant materials and agricultural runoff can also increase fecal coliform concentration in waste water.
Nitrite and Chloride
Common nitrite sources include acid rains, agricultural runoff. Chloride comes from erosion, weathering of rocks, industrial wastes and domestic wastes.
Total Hardness
It refllects the amount of dissolved calcium and magnesium salt in water resulting from weathering of rocks and anthropogenic activities
Total Suspended Solids
Suspended particles can come from soil erosion, runoff, discharges, stirred bottom sediments or algal blooms.
Soldium and Potassium
These come from erosion, weathering of rocks, industrial wastes and domestic wastes.
Magnesium and Calcium
These come from erosion, weathering of rocks, industrial wastes and domestic wastes
Heavy Metals
More than 20 heavy metals (cadmium, lead, mercury, chromium, manganese etc.,) are analyzed.
* pH, DO, EC, temperature, turbidity, Ammonium and nitrate concentration of point samples are also measured in the labratory for validation purposes.

Variation of parameters (Daily Medians) with time

Sensor Data vs Lab Data (Readings from the same site and date)

Collection Timeline

Aggregated Distribution of Parameters (Daily Medians)