[throwup238]

Yes but they still degrade relatively quickly when managed correctly so a burst of pollutants whenever it rains is better than a constant low level exposure from people washing their cars all the time.

Regions where it rains frequently like the PNW have rain gardens, vegetated swales, catch basins/filters, and other mitigation strategies all over the place whereas e.g. California might just have them throughout the drainage system like at the end of the LA river.