watering lawn with sump water---save fertilizer?

[Matt]

My sump pumps discharge onto the lawn outside the house. I notice the grass there is very lush and green.

I have a feeling that the lush growth is due not just to the grass getting more water.

I think maybe it is due to the mineral content of the sump water.

I think maybe because the sump water has percolated through the soil, it has picked up minerals that are good for the grass, whereas rain water has no dissolved minerals.

[willbair]

( -) Have been using grey water for thousands of porpoises, can't sustain if we do not re-use. Never had a plant die via grey H2o use so far x 20+ yr.