On our street recently, at least four landscape companies spraye

Avalon - On our street recently, at least four landscape companies sprayed liquid, or dispensed pelletized weed killer, bug killer and fertilizer on many lawns. Not one sign alerted everyone that these lawns, tree lawns, and sidewalks were now dangerous for people or pets. The material safety data sheets that accompany these chemicals have many precautions of dangers to people and animals about skin contact. This is a dangerous situation. Where's Avalon enforcement?