The Lead and Copper Sample Summary Results list displays sample summaries assessed for lead and copper 90th percentile, during a specific monitoring period for the water system you selected. The 90th percentile of all samples collected from the distribution system is the standard that the US Environmental Protection Agency has chosen for determining compliance with the Lead and Copper Action Level under the federal Lead and Copper Rule. The 90th percentile is determined by ranking all sample results from lowest to highest and finding a result that is 90% of the number of sample results from the top. For example, if there are 10 sample results, the 90th percentile would be the 9th sample result from the top.
On the Lead and Copper Sample Summary Results page you may view basic water system information, such as Water System No., Water System Name, Principal County Served, Status, Federal and State Type, Source, and Activity Date.
You can view the list of Lead and Copper 90th Percentile Sample Summaries for this water system using the following fields:
Water System Facility State Asgn ID No.