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