The state of Washington is nearing adoption of new risk-based rules governing non-potable onsite water systems. The rules would apply to multifamily, commercial and mixed-use buildings and would govern the treatment and use of water for non-potable applications, according to the state Health Department. Included would be collection of water from sources such as showers, sinks, toilets, dishwashers, rain and air conditioners.
Among topics to be covered by the rule are treatment, quality monitoring requirements, reporting requirements, permitting and waivers for upgrading existing systems.
Rule-making began last year and included two public meetings, says the state website. Once the rule
