CWEA Grade 3 Lab Analyst Practice Exam 2025 - Free Lab Analyst Practice Questions and Study Guide

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What kind of measurement can a dissolved oxygen meter provide?

pH levels of a solution

The amount of coliform bacteria present

Concentration of oxygen dissolved in water

A dissolved oxygen meter is specifically designed to measure the concentration of oxygen that is dissolved in water. This is crucial for assessing the health of aquatic ecosystems, as the levels of dissolved oxygen directly influence the survival of fish and other aquatic organisms.

The dissolved oxygen concentration is typically reported in units such as milligrams per liter (mg/L) or as a percentage of saturation, indicating how much oxygen is available for organisms that rely on aquatic environments for their survival.

This measurement is essential for various applications, including water quality assessment in treatment plants, monitoring natural bodies of water, and in aquaculture environments. By providing real-time data on the amount of available oxygen, a dissolved oxygen meter helps in making informed decisions to maintain optimal conditions in these environments.

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Presence of heavy metals

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