July 7, 2010–Both polycyclic aromatic hydrocarbons (primarily from combustion sources) and pesticides are pervasive in 8 diverse US national parks, according to two Environmental Science & Technology studies by international teams of university and government agency researchers.
June 30, 2010–Every spill report coming in to the NRC goes into a database which is, for the most part, publicly accessible. You can query the database online, or download it for use in your own computer-assisted reporting project.
June 30, 2010–A big fraction of the leaks and spills involved not merely oil, but produced water containing hydraulic fracturing fluid. You'll find lots of useful data on the Oil and Gas Conservation Commission website.
June 30, 2010–Investigative Reporters and Editors brings news of a special Gulf Oil Spill Report put out by the Federal Procurement Data System which lists all federal contracts that the General Services Administration (GSA) knows about.
June 9, 2010–Wastewater treatment plants can't mitigate the problem, which is compounded by other sources of water contamination, such as drugs that end up in landfills or flushed down toilets, and metabolites or unutilized drugs that pass through people who take the drugs.
June 2, 2010–The WatchDog's special Gulf oil spill issue includes stories on media access problems, withholding of information by US EPA and misleading statements by BP, mystery dispersant ingredients, BP's new ex-Cheney spokesperson, prohibiting cleanup workers talking to media, and detaining rig survivors till they sign two statements.
June 2, 2010–US EPA withheld information, and twice during the five-day operation BP cut off the mud pumps for long periods without letting the public know, making statements that left the impression the operation was ongoing.