The Delaware City Refinery has been hit with a reprimand from the Delaware Department of Natural Resources.

It results from the release last summer of air pollutants after a sudden shutdown of key equipment.

The Wilmington News Journal reports that this is the 12th time that the refinery has violated one of its permits since the beginning of last year.

The paper notes that is the most violations by any one company during the same period.

The company’s permit requires that state officials be notified of any planned shutdown at least 24 hours before hand.

Exelon Corp website

CONOWINGO, Md. (AP) - Officials say concerns about the sediment-filtering capacity of a dam on the lower Susquehanna River in northeast Maryland must be addressed in the broader context of trying to improve water quality efforts throughout the Chesapeake Bay watershed.

Construction of the Conowingo Dam in the late 1920s created a detainment area for some of the sediments and nutrients flowing down the Susquehanna toward the bay.

Swimmable Water Weekend

Jul 26, 2013

The Maryland river keepers are out testing the waters so that people across the state can jump in for Swimmable Water Weekend.

It’s a global event to raise awareness of water quality and impact of pollution.

Maryland News Connection reporter Allison Burns has the story.

Chesapeake Bay 123rf.com

BALTIMORE (AP) - The size of the Chesapeake Bay's low oxygen "dead zone" is down and dry weather is getting the credit.

The Maryland Department of Natural Resources says testing last week found nearly 12 percent of the bay had poor oxygen levels, nearly half of the long-term average for this time of year. The dead zone dropped from about 30 percent of the bay in July, which typically is when the zone peaks each year.