Environmental Working Group

From their website,
Environmental Working Group is a non-profit, non-partisan research organization dedicated to using the power of information to protect human health and the environment.

Some of their resources include:

Skin Deep, cosmetics, sunscreens safety database
FoodNews, rating pesticides in produce
Fish List, outlines which fish are the safest to eat
Everyday Pollution Solutions
Parent's Buying Guide, to safe personal care products for kids


They have a Blog too:
EnviroBlog

You can also subscribe to enewsletters, including one on Pet Health. They send about 1-2 per week depending on your interests.