WAC 246-292-040:

WACs > Title 246 > Chapter 246-292 > Section 246-292-040

HTML has links - PDF has Authentication

Print This Page

246-292-036 << 246-292-040 >> 246-292-050

Agency filings affecting this section

PDFWAC 246-292-040

Classification of public water systems.

The department shall classify water treatment plants and distribution systems.

(1) Water treatment plants.

(a) Water treatment plants are classified according to the point system in the ABC "Purification Plant Criteria" publication (October 2007) and are in Table 1.

Table 1

Water Treatment Plant Classification

Total Points Assigned	Water Treatment Plant Classification
Less than 31	Class 1
31 to 55	Class 2
56 to 75	Class 3
More than 75	Class 4

(b) The scope of water treatment plant processes include, but are not limited to:

(i) Water filtration;

(ii) Ion exchange;

(iii) Electrodialysis;

(iv) Reverse osmosis; or

(v) Inorganic contaminant removal.

(i) In-line fluoridation;

(ii) In-line chlorination; or

(iii) Chemical addition to inhibit corrosion.

(2) Distribution systems are classified according to the population served from a public water system's WFI form and are in Table 2.

Table 2

Distribution Systems Classification

Population Served	Distribution System Classification
Less than 251	Class S
251 to 1,500	Class 1
1,501 to 15,000	Class 2
15,001 to 50,000	Class 3
More than 50,000	Class 4

[Statutory Authority: RCW 70.119.050 and chapter 70.119 RCW. WSR 14-01-003, § 246-292-040, filed 12/4/13, effective 1/4/14. Statutory Authority: Chapter 70.119 RCW and Safe Drinking Water Act, Public Law 104-182; 64 F.R. 5916 - 5921. WSR 01-02-070, § 246-292-040, filed 12/29/00, effective 1/29/01. Statutory Authority: Chapter 70.119 RCW. WSR 94-04-004, § 246-292-040, filed 1/20/94, effective 2/20/94. Statutory Authority: RCW 43.70.040. WSR 91-02-049 (Order 121), recodified as § 246-292-040, filed 12/27/90, effective 1/31/91. Statutory Authority: RCW 70.119.050. WSR 78-10-053 (Order 1343), § 248-55-050, filed 9/22/78.]