pH meter in hands with gloves, glass of water on a blue background. Measurement of the characteristics of drinking water. The hardness of the water. poor water quality. high values of salt impurities
Fence, check the water sample for infections. Gloved hand with flask and a test tube on a background of lake, river, sea. Pollution of ecology, environment
Electronic pH meter in a glass of water. TDS measurement of water. poor water quality, high values of salt impurities, copy space
examination of water quality in a natural reservoir. a device for measuring impurities in water in the male hand of a scientific specialist.
Environmental issues in India. Children playing near dirty littered with debris of the lake, watching the fish. Near the water Palace in Jaipur India. Photo taken 23 February 2017.
All city roofs are occupied by black water storage tanks and different satellites. Water tank on the roof in Asia. Water heating tank against sea and the city. Asian water supply and heating system