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    Person hand filling test tube with tap water. — Stock Photo
    Person hand filling test tube with tap water.
    Toddler girl testing the water at edge of swimming pool — Stock Photo
    Toddler girl testing the water at edge of swimming pool
    Female scientist in laboratory looking at glass flask with dissolved samples of soil. — Stock Photo
    Female scientist in laboratory looking at glass flask with dissolved samples of soil.
    Male adult engineer in water treatment plant — Stock Photo
    Male adult engineer in water treatment plant
    Pollution control inspector taking sample of mud in field by lake. — Stock Photo
    Pollution control inspector taking sample of mud in field by lake.
    Water department technician opening fire hydrant to flush water pipes — Stock Photo
    Water department technician opening fire hydrant to flush water pipes
    Female scientist taking notes in soil testing laboratory. — Stock Photo
    Female scientist taking notes in soil testing laboratory.
    Lab technician using flame test probe to gather sample from vile — Stock Photo
    Lab technician using flame test probe to gather sample from vile
    Woman in a black swimsuit — Stock Photo
    Woman in a black swimsuit
    Hands in gloves of female scientist in laboratory shaking glass flask with dissolved samples of soil. — Stock Photo
    Hands in gloves of female scientist in laboratory shaking glass flask with dissolved samples of soil.
    Close-up of examination of soil samples in agricultural laboratory. — Stock Photo
    Close-up of examination of soil samples in agricultural laboratory.
    Lab technician opening sterilization tank — Stock Photo
    Lab technician opening sterilization tank
    Lab chemist placing a sample slide on a microscope stage — Stock Photo
    Lab chemist placing a sample slide on a microscope stage
    Lab chemist collecting a small amount of liquid with a dropper — Stock Photo
    Lab chemist collecting a small amount of liquid with a dropper
    Woman biologist in white coat pouring liquid from test tube into labelled containers with soil. — Stock Photo
    Woman biologist in white coat pouring liquid from test tube into labelled containers with soil.
    Safety inspector taking water sample from pool — Stock Photo
    Safety inspector taking water sample from pool
    Hands of scientist in laboratory mixing samples of soil with reagent. — Stock Photo
    Hands of scientist in laboratory mixing samples of soil with reagent.
    Water department technician using flow rate sensor — Stock Photo
    Water department technician using flow rate sensor
    Female biologist in white coat pouring water into test tube with dissolved samples of soil in laboratory. — Stock Photo
    Female biologist in white coat pouring water into test tube with dissolved samples of soil in laboratory.
    Male adult engineer in water treatment plant — Stock Photo
    Male adult engineer in water treatment plant
    Safety inspector taking water sample from pool — Stock Photo
    Safety inspector taking water sample from pool
    Hands in gloves of female scientist in laboratory shaking glass flask with dissolved samples of soil. — Stock Photo
    Hands in gloves of female scientist in laboratory shaking glass flask with dissolved samples of soil.
    Pollution control inspector taking sample of polluted water from spring in field. — Stock Photo
    Pollution control inspector taking sample of polluted water from spring in field.
    Lab technician collecting data on sterilization — Stock Photo
    Lab technician collecting data on sterilization
    Water department engineer standing in chemical treatment room — Stock Photo
    Water department engineer standing in chemical treatment room
    Agronomy technician pouring water in soil samples. — Stock Photo
    Agronomy technician pouring water in soil samples.
    Man standing thigh deep in sea — Stock Photo
    Man standing thigh deep in sea
    Agronomy technician pouring water in soil samples. — Stock Photo
    Agronomy technician pouring water in soil samples.