 In Arizona, our streets double as our storm sewers... |
 sometimes carrying runoff from small events... |
 sometimes from large events. |
 Storm water runoff accounts for about 30% of the pollutants in our nation's waters. From trash to... |
 oils and chemicals to... |
 eroded soil. |
 Detention ponds are a frequently used pollution control device or Best Management Practice (BMP). |
 Detention ponds act to trap particles eroded from exposed soil as well as the chemicals attached to those particles. |
 Detention ponds can also double as parks or... |
 sports fields or... |
 even parking lots. |
 Through the use of detention ponds and other BMPs, all storm events... |
 can be cleaner at their point of discharge. |