It comprises two measures: the number of days with an air quality index below a certain threshold and the number of violation points against drinking water systems in each state. Learn more about ...

The Safe Drinking Water Act is a federal law that sets quality standards for the systems that provide Americans with drinking water. The Environmental Protection Agency uses a weighted point ...

Journal of Urban and Environmental Engineering Vol. 1, No. 1, January to March, 2007 WATER QUALITY INDEX AS AN TOOL FOR RIVER... Abstract: The contributions of nutrients and xenobiotics by ...