Why is my line being tested, but not my neighbor’s?

The EPA is allowing cities to use a statistically valid sample of all water service connections which were installed prior to 1986. In Hermiston that equates to approximately 3,000 connections. From those accounts, 350 customers were selected utilizing a computer-based random number generator. This method provides EPA with an acceptable understanding of the prevalence of different types of service line materials in our community while containing costs.