(a) If the quarterly analysis of a water sample from a public water system by a certified laboratory confirms that the level of fluoride in the sample exceeds one and one-half milligrams per liter (1.5 mg/L), the public water system from which the sample was taken must:

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Terms Used In Tennessee Code 68-221-709

  • Certified laboratory: means any facility for performing bacteriological, chemical or other analysis on drinking water which has received interim or final certification by the department. See Tennessee Code 68-221-703
  • Department: means the department of environment and conservation. See Tennessee Code 68-221-703
  • Public water system: means a system for the provision of water for human consumption through pipes or other constructed conveyances, if such serves fifteen (15) or more connections or which regularly serves twenty-five (25) or more individuals daily at least sixty (60) days out of the year. See Tennessee Code 68-221-703
(1) Obtain laboratory analysis of water samples monthly for fluoride levels; and
(2) Notify all of its customers that a water sample tested exceeded one and one-half milligrams per liter (1.5 mg/L) of fluoride in a manner established by the department.
(b) Once the monthly analysis of water samples for fluoride conducted pursuant to subdivision (a)(1) confirms that the fluoride level in samples is less than one and one-half milligrams per liter (1.5 mg/L) for three (3) consecutive months, the public water system may resume quarterly laboratory analysis for fluoride.
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