Environmentalists charge that the Bush administration is making concessions to industry at the expense of theenvironment. The latest move came this week when the Environmental Protection Agency announced it would withdraw anew drinking water regulation approved by the Clinton administration. The rule, which would have reduced by 80percent the permissible standard for arsenic in drinking water, had been a priority of environmental groups for morethan a decade. But the mining industry and by some municipalities complained that lowering allowable levels of thecarcinogen would be too expensive.