"Can I use laundry water to water plants and lawn instead of just sending it into the sewer, and if so is there some where I can go to find more information on this?"

We are assuming you live in Utah. If not, you will need to check with your state environmental quality and/or health department. Utah does not currently allow the use of graywater piped directly from the home for irrigating landscapes. Exceptions can be made for certain experimental systems. If you want to pursue this begin by contacting your local health department.

Many other western states do allow the use of graywater and there are few problems. There are some good resources on the web. Take a look at the following sites:
http://www.graywater.net/
http://www.wvu.edu/~agexten/hortcult/homegard/graywate.htm
http://ag.arizona.edu/AZWATER/arroyo/071rain.html
http://www.lasvegassun.com/sunbin/stories/lv-other/2001/jul/06/512048650.html