[jd20]

Kind of OT, but I agree phosphate pollution's a big problem and there's a lot of measures people can take to wash their cars responsibly. I've switched to just a bucket and low-flow pressure washer, which uses about 30x less water than a garden hose (and even less than my shower head, and unlike my shower, only runs when I pull the trigger). As a result, I have no run-off from the driveway, and what little water does get used is mostly recaptured and used to water plants. Honestly, at this point I think I use more water to shower, and I definitely take far more showers than I wash my cars.