Many Texans had no idea that carcinogenic radiation was in their tap water.

For decades, the environmental agency that was supposed to protect the public from pollution had been deliberately changing radiation test data for water systems.

Not only had false data been reported to consumers, but the "lowballing" also allowed water providers to avoid breaking federal safe drinking water rules.

This all began when KHOU I-team member Keith Tomshe noticed a disclaimer on his water bill stating that small amounts of arsenic, also a carcinogen, had been found in his neighborhood’s drinking water. The disclosure is called a ...

For 20 years, an obscure Virginia regulatory board has forced thousands of landowners to lease their mineral rights to private energy corporations.

The corporations who drain natural gas belonging to landowners are required to pay them royalties. But whenever conflicts arise over gas ownership, the Virginia Gas and Oil Board places royalties into escrow accounts. Landowners receive no accounting of these royalties and cannot collect them without clearing enormous legal hurdles. Only two state employees monitor payments into the escrow, which now contains $25 million and has never undergone a compliance audit.

When I started my reporting, I wanted to ...

Assessing the health of the nation's water is a daunting task, and the subject of an ongoing New York Times series called "Toxic Waters." It can't be done through data alone, but there is plenty of data available, particularly at the federal level. But working with it proved to be a difficult and occasionally frustrating task. Here's the story behind the database that we built for our readers.

Records describing enforcement of the Clean Water Act can be found at the federal level and among dozens of states that have authority to administer some or all of ...

California's Board of Registered Nursing oversees more licensees, some 350,000, than any state nursing agency in the country. It is responsible for ensuring that nurses at patients' bedsides are not only competent, but sober, sane and law-abiding. So when we became suspicious that the board was fumbling its duties, leaving members of the public at risk, we wanted to ground our reporting in more than anecdotes, although those were rich and plentiful. Figuring out how to do this proved both time-consuming and hugely rewarding.

We first became interested in the board after we spent much of 2003 and ...

Go to one of Minnesota’s many state forests, and you’re likely to see — or hear — one of the state’s fastest growing recreational activities. Ownership of all-terrain vehicles has more than tripled in the past decade in Minnesota, with 264,000 vehicles registered with the state. ATV riding is permitted in many state forests. Eventually, ATV riders will have thousands of miles of trails and forest roads to explore once state natural resource officials finish an assessment of the trail system. Five years ago there were virtually no restrictions on ATV use in 46 of 58 state forests ...