The South Coast Air Quality Management District unveiled the blueprint for cleaning up what it called the worst overall air quality in the nation.

It called for tightening pollution standards on everything from cars to lawn mowers to hand-held power equipment like blowers. The proposals would also offer incentives for businesses to replace aging diesel equipment, and reducing pollution from ships at the sprawling Los Angeles-Long Beach port complex.

“We need a no-holds-barred campaign to meet the formidable challenge of achieving clean air,” Barry Wallerstein, the AQMD’s executive officer, said in a statement.

The plan addresses clean air issues in Los Angeles, Orange, Riverside and San Bernardino counties. It contains nearly 60 ideas for reducing emissions. But many changes would require approval from state or federal regulators.

It must first go through a public comment period and win approval by the AQMD board.

The plan is an update of the latest plan passed in 2003. Previous California Air Resources Board (CARB) rules led to the unveiling of a new generation of cleaner lawn equipment by manufacturers.