pH measurement is a key step in many water testing and purification processes. A change in the pH level of water can alter the behavior of chemicals in the water, and pH level affects product quality and consumer safety, so pH is monitored and managed in a wide range of water treatment settings.

pH Meters, Sensors and Test Kits

Why pH Measurement, Testing and Analysis Matter for Water Quality

pH is a measure of the hydrogen ion activity in a solution. Pure water that contains an equal balance of positive hydrogen ions (H+) and negative hydroxide ions (OH-) has a neutral pH.

Featured pH/ORP Analyzers and Testing Products

Portable pH Meters

Portable pH Meter

Simple and affordable pH measurement for home, school, and hobbyist use. Hach's pH testers deliver quick and easy measurements with accurate and reliable results. We also offer pH buffer solutions for our testers.

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Benchtop pH Meters

HQD

Accurate and precise pH measurement for laboratory and industrial applications. Hach's benchtop pH meters offer advanced features and user-friendly interfaces.

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pH / ORP Sensors and Probes

DPD

Select the right sensor or probe for precise pH/ORP measurement. Explore and shop our wide range of solutions that suit your application now.

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Controllers and Transmitters

LXV

Ensure consistent pH control with Hach's reliable suite of controllers and transmitters. Choose from our range of automated solutions for various applications.

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pH Testers

pH tester

Simple and affordable pH measurement for home, school, and hobbyist use. Hach's pH testers deliver quick and easy measurements with accurate and reliable results. We also offer pH buffer solutions for our testers.

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pH Test Strips

pH Test Strip

Take the guesswork out of pH testing with Hach's pH test strips. Our high-quality strips provide quick and dependable readings for a variety of applications.

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Which Processes Require pH Monitoring?

pH of drinking water is measured at multiple stages in a drinking water plant. Normal pH range for tap water is 6.5-8.5 throughout both treatment process and distribution. Drinking water pH level must be monitored to minimize corrosion, contamination and adverse effects on taste, odor, color and appearance.


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A drinking water treatment plant monitors pH in several stages of water purification.

Methods for Monitoring pH

Frequently Asked Questions

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