One course of action is to report this to the HOA. They were already reported for parking on the grass there and damaging the grass, and I understand the HOA took action.

DPW HWYS Amy Rill assigned this issue to DPW HWYS Dayton (central)

DPW HWYS M Shifflett assigned this issue to Stormwater_Cynthia A

Thank you for submitting your request to Howard County Stormwater Management. Our staff will investigate the reported Illicit Discharge and Dumping issue during normal business hours Monday-Friday and respond. If this is an emergency, please call 9-1-1.

Does the HOA have any authority to prevent the owner's from parking cars that are leaking oil onto the road?Seems like this is a HoCo Hwys issue.

Storm water management has inspected the site and will be issuing a notice of violation for an Illicit Discharge into the storm drain system.