I use Ecover!

Washing powder ingredients

15 - 30%: Carbonate, zeolite, 5 - 15%: anionic and an-ionic surfactants (plant based), soap (plant based), citrate (plant based), bicarbonate <5%: sulphate, disilicate, cellulose derivatives (plant based), magnesium sulphate, polypeptide, complexing agent.

It performs really well, so does their fabric conditioner, I understand all the ingredients to be safe and environmentally sound (I am no expert though, still in the finding-out stage).

http://www.ecover.com

Mel