1. (1) A purveyor of a Group B system shall provide potable water to the system's consumers.

2. (2) The department or health officer may require a purveyor to collect water quality samples, have the samples analyzed by a certified lab, and report results as required under WAC 246-291-360, when the department or health officer:

   1. (a) Determines a public health risk exists;
   2. (b) Receives information documenting contamination;
   3. (c) Receives a report of suspected or known waterborne illness from a health care provider as required under chapter 246-101 WAC; or
   4. (d) Is aware of, or observes, a situation in which the source may be vulnerable to contamination. For example, a source is vulnerable to contamination from a flood event.

[Statutory Authority: RCW 43.20.050 and chapter 70.119A RCW. WSR 12-24-070, § 246-291-300, filed 12/4/12, effective 1/1/14. Statutory Authority: RCW 43.20.050. WSR 94-14-002, § 246-291-300, filed 6/22/94, effective 7/23/94.]