A national scheme that gives pollution monitoring equipment a clean bill of health and certifies its accuracy and reliability has been expanded to cover two dioxin monitors. The Environment Agency's Monitoring Certification Scheme (MCERTS) awards kite marks to pollution-gauging equipment that meets the highest standard and helps industry comply with regulations. MCERTS is important as not only does it assure quality, but Environment Agency permits issued under the Pollution Prevention Control (PPC) regulations require manufacturers to use MCERTS-approved monitoring equipment where such products are available.