nitrogen oxides

EPA investigating Navistar over engine dates

Company, facing millions of dollars in potential fines, says its "2010 transition was appropriate."

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Navistar sues EPA again over SCR rule

Navistar alleges nitrogen oxide emissions skyrocket when drivers don't keep diesel exhaust fluid topped off.

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Oakland port truckers seek emissions rule delay

Drayage trucking companies that serve the Port of Oakland, which use primarily owner-operators, are seeking support to delay a California Air Resources Board mandate that requires trucks to be retrofitted with nitrogen oxide-reduction equipment by 2014. A trade group representing port truck operators estimates that without a postponement in the NOx requirement 4,400 trucks of 1994-2006 model years would have to be replaced with 2007 or newer models by January 2014. Last December, CARB voted against ...

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Los Angeles port says emissions dropped

Diesel particulate matter emissions in 2009 dropped by 37 percent from 2008 and nitrogen oxide emissions fell 28 percent.

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Navistar, EPA settle suits over SCR certification

The agreement calls for the agency to hold a public workshop or hearing to address the issues Navistar raised.

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Navistar drops emissions equipment suit against CARB

The truck and engine maker had asked a state court to rule CARB was improperly certifying 2010 diesel engines equipped with selective catalytic reduction.

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California fines for diesel emission violations

The state's Air Resources Board has penalized three state trucking companies a total of $43,000 for diesel truck violations.

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California fines for diesel emission violations

The state's Air Resources Board has penalized three state trucking companies a total of $43,000 for diesel truck violations.

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