Method Update Rule

EPA has changed the acceptance criteria for wastewater testing under 40 CFR 136 to the approved date of the method; 1997 to present. The 18th and 19th Editions of Standard Methods are

NRWA Mobile App

The NRWA app contains 14 calculators for common water formulas, including Dose, Chlorine Demand and Filtration Rate. The app also includes access to the NRWA News Pipeline which will provide updates on

Notice of Intended Regulatory Action (NOIRA)

Environmental laboratories are required by ยง2.2-1105 of the Code of Virginia to be certified before submitting data to the Department of Environmental Quality (DEQ) under Virginia’s air, water, and waste laws and