BOSTON — Warmer weather is arriving in New England and federal regulators are urging residents to be mindful of the increased risk of ground-level ozone.

Curt Spalding, regional Environmental Protection Agency administrator, says air pollution is a significant public health issue, and that residents should pay attention to alerts.

Last October, the EPA lowered the ozone standard slightly, creating a more stringent standard. Air quality alerts are issued the level is exceeded.

The number of alerts has been on a downward trend. Based on the new standard, New England had 118 unhealthy days in 1983, compared with 38 last year.