EPA has published a memorandum to improve primacy agency oversight of the selection of sample sites and monitoring frequency by public water systems.
The memorandum emphasizes that if there are not a sufficient number of tier 1 sites in the originally-defined sampling pool, the system should look across the entire distribution system to ensure the sampling pool consists solely of tier 1 sites, if enough exist in the community.
It also highlights examples of documents that should be maintained by primacy agencies that demonstrate they have reviewed systems prior to approving reduced monitoring to once every three years.You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.
- Implementation of the Lead and Copper Rule Provisions Related to Sample Site Selection and Triennial Monitoring (PDF)(4 pp, 738 K, October 13, 2016, WSG 200)