Storm drains are designed for catching rain water only. Dumping trash or other pollutants down storm drain inlets is illegal and is a violation of the Federal Clean Water Act of 1972 as well as the County of Sacramento's Stormwater Ordinance. If a neighbor is disposing of trash in the storm drain, they may not understand that drain inlets directly connect to our creeks and rivers.
If you have an amicable relationship with your neighbor, it may be just a matter of informing and making them aware of its environmental impact. If it is someone who you feel is knowingly violating and repeatedly dumping into storm drains, please call the County of Sacramento, Department of Water Resources, Stormwater Quality Program at (916) 875-RAIN; or the City of Sacramento Department of Utilities at (916) 808-1400.