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    Water department technician opening fire hydrant to flush water mains — Stock Photo
    Water department technician opening fire hydrant to flush water mains
    Lab chemist collecting a small amount of liquid with a dropper — Stock Photo
    Lab chemist collecting a small amount of liquid with a dropper
    Lab technician holding sample in flame — Stock Photo
    Lab technician holding sample in flame
    Woman in a black swimsuit — Stock Photo
    Woman in a black swimsuit
    Woman in a black swimsuit — Stock Photo
    Woman in a black swimsuit
    Two scientists experimenting with a water sample — Stock Photo
    Two scientists experimenting with a water sample
    Lab chemist preparing graduated cylinder for standard solution — Stock Photo
    Lab chemist preparing graduated cylinder for standard solution
    Close-up of businesswoman holding a glucometer in the office — Stock Photo
    Close-up of businesswoman holding a glucometer in the office
    Lab technician collecting data on sterilization — Stock Photo
    Lab technician collecting data on sterilization
    Lab technician holding tray of calibrated samples — Stock Photo
    Lab technician holding tray of calibrated samples
    Lab chemist placing a sample slide on a microscope stage — Stock Photo
    Lab chemist placing a sample slide on a microscope stage
    Woman in a black swimsuit — Stock Photo
    Woman in a black swimsuit
    Peas in testing tubes — Stock Photo
    Peas in testing tubes
    Agronomy technician pouring water in soil samples. — Stock Photo
    Agronomy technician pouring water in soil samples.
    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.
    Lab technician picking up samples — Stock Photo
    Lab technician picking up samples
    Lab technician opening sterilization tank — Stock Photo
    Lab technician opening sterilization tank
    Water department technician coiling hose used to flush hydrant — Stock Photo
    Water department technician coiling hose used to flush hydrant
    Colorist mixing hair dye — Stock Photo
    Colorist mixing hair dye
    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.
    Engineer walking by water treatment plant ultraviolet ionization treatment room — Stock Photo
    Engineer walking by water treatment plant ultraviolet ionization treatment room
    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.
    Water department engineer standing in chemical treatment room — Stock Photo
    Water department engineer standing in chemical treatment room
    Colorist mixing hair dye — Stock Photo
    Colorist mixing hair dye