The Puerto Rico Aqueduct and Sewer Authority also will pay a $1 million civil penalty and spend an additional $2.5 million to improve lake water quality.
The agency will engage in a public process to re-examine its policies.
Agency expects rule would cut mercury emissions by more than 50 percent.
Environmental organization braces for Gulf disaster impact on fragile coastal ecosystems and fisheries.
Research by National Science Foundation award winner Peter Sunderland may help engine designers improve the way fuel is injected and burned.
EPA is sharing 30 years of testing results through an online searchable database called ToxRedDB.
Research suggests that endotoxins, which attach to particulate matter, may play a role in chronic inflammation of the heart.
Relief wells will be drilled. In Houma, La., where the field operations response is being coordinated, almost 500 workers have been deployed to coordinate the spill response.
The National Institute of Environmental Health Sciences led the work on the federal report, which recommends that future research determines who will be most vulnerable to climate change and what efforts will be most beneficial.
Chemical manufacturers' group encourages members to voice their concerns on chemical site security and TSCA reform.
Agency will determine if lead in aviation gas poses threat to public health.
Nuclear engineer Arnold Gundersen says corrosion turns “passive” emergency feature into greater accident risk.
The agency has partnered with the state of Kansas to help the owners of 77 residential and business properties move away from the Tar Creek Superfund site in Oklahoma.
The state's environmental agency has received approval for administering and enforcing the Lead Renovation, Repair and Painting program.
Researchers are measuring antimony concentrations from water samples near the world's largest antimony mine in Xikuangshan, China.
SOCMA calls the efforts of Congress to reform the Toxics Substance Control Act overreaching; Safer Chemicals group wants more teeth in the measure.
Cell-All initiative would equip cell phones with sensors capable of detecting such chemicals as carbon monoxide and fire.
Alabama, Oklahoma, Ohio residents want EPA to regulate coal ash as a hazardous waste.
An Institute for Energy and Environment Research report notes that France uses less than 1 percent of the natural uranium resource and has higher waste volume.