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.