Position gutters and roof spouts to drain onto grass, and away from concrete, so the rainwater can soak into the ground. Lighten your workload. Take your car to a professional carwash where water is recycled and cleaning solutions can be better managed. If you must wash your car at home, wash it over grass using mild, biodegradable, phosphate-free soap. Clean up after your pet.
Animal waste runs off lawns and curbs and contributes to bacterial pollution of surface waters.
Scoop or bag droppings and discard with trash.