AWWA recommends 5/8-in. meters be tested every:

The correct recommendation from the American Water Works Association (AWWA) regarding the testing frequency for 5/8-inch water meters is every 10 years. This guideline is built on the understanding that water meters can become less accurate over time due to wear and environmental factors. Regular testing ensures that meters are functioning correctly and billing is accurate for the water consumed by customers.

By adhering to the 10-year testing interval, utilities can maintain the integrity of their measurement equipment, minimize revenue losses due to under-registering meters, and ensure fair charges for consumers based on actual water usage. This practice is part of broader asset management strategies in the water industry to optimize meter performance and accountability. Other intervals provided in the choices either underrepresent or overshoot the recommended timeframe, aligning with best practices in meter maintenance and customer reliability.