490 R.I. Code R. 490-RICR-00-00-2.7
All water suppliers and institutional water suppliers which obtain, transport, purchase, or sell more than 50,000,000 gallons of water per year shall be required to prepare, maintain, and carry out a Water Supply Systems Management Plan (WSSMP) as described by these procedures. A supplier that bills 50 million gallons or less of public drinking water per calendar year shall be exempt from the implementation of the Act under the Board's application of "de minimis no carat lex". In order to continue to qualify for said de minimis exemption the supplier must report annually in January of each year the total amount of water produced or total amount of water billed for the preceding calendar year. Any supplier exceeding the 50 million-gallon threshold for the prior calendar year shall be subject to this Act, these rules, and the imposition of water quality charges starting March 1st following the calendar year in which billings exceeded the 50 million-gallon threshold. Once a de minimis supplier becomes subject to imposition of the charge under these rules, even though such supplier may subsequently fall below the 50 million-gallon per year threshold, said supplier shall continue to be subject to the Act. Institutional water systems, which exceed the 50 million-gallon threshold, shall be subject to the Act. Pumping records on a calendar year basis shall be utilized as the indicator for this eligibility.
490 R.I. Code R. 490-RICR-00-00-2.7