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Side view of young female biologist using multiparameter instrument while testing dissolved oxygen in river.

Close up scientist hand hold glass tube that contains sample of water to do science experiment. Concept Testing of water quality and contaminants from natural water sources

Marine Swimming Beach and Shellfish Monitoring water quality testing close-up

Hydro biologist testing quality of water

Scientist examing toxic water

Male hands taking sample of the water for analyzing and control environment pollution. Close up background

Mid Adult Biologist Measuring PH Value of Water on Field Directly in Water Stream

A high angle view of a female scientist checking the sample of water in the test tube and seeing if there are any signs of microplastics or pollutants in the water sample she has just collected.

Water sample. Hand in glove collects water in a Beaker. Concept - water purity analysis, environment, ecology. Water testing for infections from industrial factory

Environmental researchers investigate the condition of canal water for toxic spills, river waste water sampling, Asian researchers collect water samples in farmland for research and development.

Mature female biologist adding reagent into a vial with water sample near river.

A biological laboratory worker took samples of river water for analysis using a test tube, close-up of a hand in a blue glove with a full test tube against the background of water

Testing water, water quality test and analysis

Water sample and purity analysis test, liquid in laboratory glassware testing for pollution, contamination, water quality control or plastic substance distribution

Scientist examining toxic water samples

Forest, sample and hands of environmentalist test water for research or inspection of the ecosystem and environment study. Science, sustainable and professional scientist doing carbon footprint exam

Inspector holding a chemical flask with river water. Water testing for infections.

Environmental Scientist Examining Wastewater from factory at industrial estate

Water Safety in a Everyday More polluted Air Question

Man testing quality of natural water

Two colleagues working together outdoor in nature analysing water quality in river

Water sample. Gloved hand into the water collecting tube. Analysis of water purity, environment, ecology - concept. Water testing for infections, harmful emissionsWater sample. Gloved hand into the water collecting tube. Analysis of water purity, environment, ecology - concept. Water testing for infections, harmful emissions

Environmental Engineers Team Take Water Samples at Natural Water Sources. Water that smells bad Near Farmland, Fish Ponds May Be Contaminated by Toxic Suspicious Pollution Sites.

An unrecognizable person leaning over and taking a sample of water from a river stream in Hexham and checking the water for traces of plastics and pollution.

Ecologist doing field-based water samples studies using mobile laboratory. Survey of biodiversity in marine ecosystems and restorative environments (dams).

examination of water quality in a natural reservoir. a test tube in a man's hand with water to check its purity.

Asian student biology taking and testing sample of natural river water. Experts science women keep water for research explore analysis in the laboratory. Environmental pollution Concept

Close-up scientist hand with nitrile glove collect sample wastewater into a flask for laboratory water analysis, industrial and environmental concept

Man testing quality of natural water

Mature woman collected river water sample for analysis in a test tube and recorded the experimental results in the tablet. Environmental research.

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