Yes, 150 psi is generally considered too high for household water pressure. The normal range for residential water pressure is typically between 40 to 60 psi. Having water pressure significantly higher than this range can lead to problems like burst pipes, leaks, and damage to appliances and fixtures. It's essential to reduce high water pressure to a safe and manageable level by installing a pressure regulator. Regularly monitoring and maintaining the water pressure within the recommended range is crucial to prevent potential plumbing issues and ensure the longevity of your plumbing system.