Washington Administrative Code

This section expires on January 1, 2027.(1) Each existing community water system must deliver its report by July 1st annually. Each annual report must contain data collected during, or prior to, the previous calendar year as required by WAC 246-290-72005(3).(2) A new community wa…

This section expires on January 1, 2027. Information on the source of the water delivered:(1) Each report must identify the source(s) of the water delivered by the community water system by providing information on:(a) The type of the water, for example, surface water, groundwate…

This section expires on January 1, 2027.(1) Each report must include the following definitions:(a) Maximum contaminant level goal or MCLG: The level of a contaminant in drinking water below which there is no known or expected risk to health. MCLGs allow for a margin of safety.(b)…

This section expires on January 1, 2027.(1) This section specifies the requirements for information to be included in each report for contaminants subject to mandatory monitoring. It applies to:(a) Contaminants subject to an MCL, federal action level, SAL, TT, or MRDL (regulated …

This section expires on January 1, 2027.(1) If the system has performed any monitoring for Cryptosporidium, and the results indicate that Cryptosporidium may be present in the source water or the finished water, the report must include:(a) A summary of the results of the monitori…

This section expires on January 1, 2027. In addition to the requirements of WAC 246-290-72005(6), the report must note any violation that occurred during the year covered by the report of a requirement listed below, and include a clear and readily understandable explanation of th…

This section expires on January 1, 2027. If a system is operating under the terms of a variance or an exemption issued under WAC 246-290-060, the report must contain:(1) An explanation of the reasons for the variance or exemption;(2) The date on which the variance or exemption wa…

This section expires on January 1, 2027.(1) The report must contain a brief explanation regarding contaminants which may reasonably be expected to be found in drinking water including bottled water. This explanation may include the language of (a) through (c) of this subsection o…

This section expires on January 1, 2027. All reports must prominently display the following language: Some people may be more vulnerable to contaminants in drinking water than the general population. Immuno-compromised persons such as persons with cancer undergoing chemotherapy, …

This section expires on January 1, 2027. Each community water system must mail or otherwise directly deliver one copy of the report to each customer.(1) The system must make a good faith effort to reach consumers who do not get water bills. The department expects that an adequate…

This section expires on January 1, 2027.(1) This section specifies the requirements for information to be included in each report for groundwater systems. It applies to the following situations:(a) A significant deficiency that is uncorrected at the time of the report;(b) An E. c…

This section expires on January 1, 2027. Systems required to comply with WAC 246-290-300(3):(1) Any system required to comply with the level 1 assessment requirement or a level 2 assessment requirement that is not due to an E. coli MCL violation must include in the report the tex…

This section takes effect on January 1, 2027. WAC 246-290-72100 through 246-290-72400 establishes minimum requirements for the content of reports that community water systems must deliver to their customers. These reports must contain information on the quality of the water deliv…

This section takes effect on January 1, 2027.(1)(a) Each existing community water system must deliver its report by July 1st annually. Each annual report must contain data collected during, or prior to, the previous calendar year as required by WAC 246-290-72230(3).(b) Systems se…

This section takes effect on January 1, 2027.(1) Each community water system must directly deliver a copy of the report to each customer.(a) Systems must use at a minimum, one of the following forms of delivery:(i) Mail or hand deliver a paper copy of the report;(ii) Mail a notif…

This section takes effect on January 1, 2027.(1) Each report must include a summary displayed prominently at the beginning of the report, including a brief description of the nature of the report.(2) Systems must include, at a minimum, the following information in the summary:(a)…

This section takes effect on January 1, 2027.(1) Each report must identify the source(s) of the water delivered by the community water system by providing information on:(a) The type of the water, for example, surface water, groundwater, spring water, or purchased water; and(b) T…

This section takes effect on January 1, 2027.(1) Each report must include the following definitions:(a) Contaminant: Any physical, chemical, biological, or radiological substance or matter in water.(b) EPA: United States Environmental Protection Agency.(c) Maximum contaminant lev…

This section takes effect on January 1, 2027.(1) This section specifies the requirements for information to be included in each report for contaminants subject to mandatory monitoring. It applies to:(a) Contaminants subject to an MCL, federal action level, SAL, TT, or MRDL (regul…

This section takes effect on January 1, 2027.(1) If the system has performed any monitoring for Cryptosporidium, and the results indicate that Cryptosporidium may be present in the source water or the finished water, the report must include:(a) A summary of the results of the mon…

This section takes effect on January 1, 2027. In addition to the requirements of WAC 246-290-72230(6), the report must note any violation that occurred during the period covered by the report of a requirement listed in this section, and include a clear and readily understandable …

This section takes effect on January 1, 2027. If a system is operating under the terms of a variance or an exemption issued under WAC 246-290-060, the report must contain:(1) An explanation of the reasons for the variance or exemption;(2) The date on which the variance or exempti…

This section takes effect on January 1, 2027.(1) The report must contain a brief explanation regarding contaminants which may reasonably be expected to be found in drinking water including bottled water. This explanation may include the language of (a) through (c) of this subsect…

This section takes effect on January 1, 2027.(1) This section specifies the requirements for information to be included in each report for groundwater systems. It applies to the following situations:(a) A significant deficiency that is uncorrected at the time of the reporting per…

This section takes effect on January 1, 2027. This section applies to systems required to comply with WAC 246-290-300(3).(1) Any system required to comply with the level 1 assessment requirement or a level 2 assessment requirement that is not due to an E. coli MCL violation must …

This section takes effect on January 1, 2027. This section applies to systems subject to 40 C.F.R. 141 Subpart I.(1) The report must notify consumers that complete lead tap sampling data are available for review and must include information on how to access the data.(2) The repor…

This section takes effect on January 1, 2027. All reports must prominently display the following language: Some people may be more vulnerable to contaminants in drinking water than the general population. Immuno-compromised people such as people with cancer undergoing chemotherap…

ContaminantMCL or SAL(units match lab results)To convertlab resultsfor CCR,multiply byMCL orSAL inCCR unitsMCLG in CCR unitsMajor Sources inDrinking WaterHealth Effects LanguageMicrobiological ContaminantsTotal Coliform BacteriaTT-TT0Naturally present in the environmentColiforms …

(1) The purpose of Part 8 is to:(a) Define requirements for water use efficiency programs in water system plans developed under WAC 246-290-100 and small water systems management programs developed under WAC 246-290-105.(b) Establish a water distribution system leakage standard.(…

(1) Water system plans and small water system management programs submitted for approval for the first year after January 22, 2007, must describe the municipal water supplier's existing water use efficiency program. The municipal water supplier must continue existing levels of wa…

(1) Municipal water suppliers shall determine distribution system leakage annually under subsection (2) of this section or an alternative methodology under subsection (3) of this section.(a) Municipal water suppliers shall include (i), (ii), or (iii) of this subsection in water u…

(1) The elected governing board or governing body of the public water system shall establish water use efficiency goals within one year of the effective date of this rule for systems serving one thousand or more total connections, and within two years of the effective date of thi…

(1) Municipal water suppliers shall develop an annual water use efficiency performance report and must:(a) Send the water use efficiency performance reports to the department and the consumers by July 1st of each year for the previous year and make them available to the public;(b…

(1) This section outlines fees for the review and approval of water system plans, project reports, construction documents, existing systems, other services, and related evaluations and inspections required under chapters 246-290, 246-291, 246-293, 246-294, and 246-295 WAC.(2) The…

(1) The purpose of this chapter is to protect the health of consumers by establishing minimum design, construction, and other standards for Group B public drinking water systems.(2) This chapter is adopted under chapter 43.20 RCW. A purveyor of a Group B public water system shall…

(1) The rules of this chapter apply to a Group B public water system that provides drinking water to fewer than fifteen service connections and:(a) Fewer than twenty-five people per day; or(b) Twenty-five or more people per day for fewer than sixty days per year, provided the sys…

The definitions, abbreviations, and acronyms in this section apply throughout this chapter unless the context clearly indicates otherwise.(1) "Acute" means posing an immediate risk to human health.(2) "ADD (average day demand)" means the total volume of water produced from all so…

Water sources used by a facility regulated under chapter 16-165 WAC that produces bottled water or ice for public consumption shall meet the requirements under chapter 246-290 WAC.[Statutory Authority: RCW 43.20.050 and chapter 70.119A RCW. WSR 12-24-070, § 246-291-025, filed 12/…

(1) The department administers this chapter unless:(a) A local board of health adopts rules under RCW 70.05.060 or 70.46.060 to implement this chapter that are at least as stringent as this chapter; or(b) The local health jurisdiction has accepted primary responsibility for admin…

(1) When a Group B system is out of compliance with this chapter, the department may initiate enforcement actions under RCW 70A.125.030 and 70A.125.040.(2) A health officer may initiate enforcement actions as authorized under RCW 70.46.060 and 70A.125.050, and as authorized under…

(1) A health officer or local board of health may grant a waiver from the requirements of this chapter, provided that:(a) The local health jurisdiction has:(i) Adopted rules under RCW 70.05.060 or 70.46.060 that are at least as stringent as this chapter; or(ii) Accepted primary r…

(1) A purveyor of a new or expanding Group B system shall comply with the applicable coordinated water system plan created under chapter 246-293 WAC and 70A.100 RCW if located within the boundaries of a critical water supply service area.(2) The department or health officer shall…

(1) A purveyor shall receive written department or health officer approval of a design report prior to:(a) Installing a new Group B system; or(b) Providing service to more than the current approved number of service connections.(2) To obtain design report approval for a Group B s…

(1) Groundwater sources submitted to the department or health officer for design approval under WAC 246-291-120 must comply with the following requirements:(a) Drinking water shall be obtained from the highest quality source feasible.(b) All permanent groundwater sources must:(i)…

(1) A purveyor submitting a new or expanding Group B system design for approval using a nonemergency intertie source shall provide the following to the department or health officer:(a) A copy of the intertie agreement under subsection (2) of this section;(b) Evidence that the sup…

(1) A purveyor submitting a new or expanding Group B system design for approval shall provide the following information to the department or health officer:(a) The system's management and ownership;(b) The system's service area and existing and proposed major facilities;(c) The m…

(1) All water quality samples collected under this section must be:(a) Collected without chlorine, ultraviolet light, ozone, or other disinfectant in use to treat the source;(b) Collected after the well has been pumped long enough to allow for collection of a representative sampl…

(1) A purveyor submitting a new or expanding Group B system design for approval shall use good engineering practices and apply industry standards in the design, such as those in:(a) The department guideline titled Group B Water SystemDesign Guidelines (2012);(b) Water Systems Cou…

(1) In the design of a new or expanding Group B system, all materials in contact with potable water shall conform to the ANSI/NSF Standard 61.(2) Pipes, pipe fittings, fittings, fixtures, solder, or flux used in the design of a new or expanding Group B system shall be lead-free. …

(1) Storage reservoirs shall be designed to:(a) Prevent entry by birds, animals, insects, excessive dust, and other potential sources of external contamination;(b) Include:(i) A weathertight roof;(ii) A lockable access hatch;(iii) A screened roof vent;(iv) An overflow pipe with a…