The Clayton, CA pollution index is the sum of the most hazardous air pollutants displayed in pounds. The Clayton, CA pollution index is 24.4% less than the California average and 170.1% greater than the national average.
Definition of real. 1  1 : of or relating to fixed, permanent, or immovable things (such as lands or tenements)
âº to do or make something that looks real but is not real: 1  In cheap furniture, plastic is often used to simulate wood. 2  formal Ruth simulated pleasure at seeing Sam, but really she wished he hadn't come. 3  The computer simulates (= represents) different road conditions for new drivers to practise on.