WAC 246-292-040   Classification of public water systems.  (1) The department shall classify purification plants according to the Association of Boards of Certification's "Purification Plant Criteria" and set forth in the Water Works Certification Program Guideline (guideline). Copies of the guideline are available on request by contacting the Department of Health, Drinking Water Division, Water Works Certification Program P.O. Box 47822, Olympia, Washington 98504-7822.

     (2) The department shall classify distribution systems into groups as follows:

Classification		Population Served*
Group S		less than 251
Group 1		251 to 1,500
Group 2		1,501 to 15,000
Group 3		15,001 to 50,000
Group 4		greater than 50,000
*	If the population served is not known, apply this formula: Number of Service Connections x 2.5 = Population Served

[Statutory Authority: Chapter 70.119 RCW and Safe Drinking Water Act, Public Law 104-182; 64 F.R. 5916 - 5921. 01-02-070, § 246-292-040, filed 12/29/00, effective 1/29/01. Statutory Authority: Chapter 70.119 RCW. 94-04-004, § 246-292-040, filed 1/20/94, effective 2/20/94. Statutory Authority: RCW 43.70.040. 91-02-049 (Order 121), recodified as § 246-292-040, filed 12/27/90, effective 1/31/91. Statutory Authority: RCW 70.119.050. 78-10-053 (Order 1343), § 248-55-050, filed 9/22/78.]