Which of the following is NOT a purpose of a meter?

The purpose of a utility meter is primarily to measure and record energy consumption accurately for billing and analysis. Each of the other choices directly relates to the functions typically associated with utility meters.

Meters are used to measure energy for billing, ensuring that customers are charged accurately based on their consumption. They also record demand in kilowatts, providing information about peak usage that helps utilities manage load and plan for capacity needs. Additionally, meters can track energy usage over time, allowing both utilities and consumers to analyze trends in usage, identify areas for efficiency improvements, and inform future energy needs.

In contrast, monitoring water quality is not a function of standard utility meters that measure energy consumption. Although there are specific instruments and sensors designed for assessing water quality, those do not fall under the typical meter functions related to energy or demand measurement. Therefore, the choice referring to monitoring water quality stands out as it does not align with the core purposes of a standard electricity or gas meter.