The United States Environmental Protection Agency, Region IX (ÂEPAÂ), the San Carlos Apache Tribe (ÂTribeÂ), and the San Carlos Apache Tribal Utility Authority (ÂTribal Utility AuthorityÂ) voluntarily enter into this Administrative Order on Consent (ÂConsent Order or ÂOrderÂ) for the purpose of bringing ten of the public water systems owned and operated by the Tribe and Tribal Utility Authority into compliance with the requirements of the federal Safe Drinking Water Act (ÂSDWA or Âthe ActÂ), 42 U.S.C. 300f et seq., and its National Primary Drinking Water Regulations (ÂNPDWRsÂ) at 40 C.F.R. Part 141.