Shenango Inc. has made repairs at its coke works on Neville Island, cutting the smoke and gas emissions and reducing violations enough to meet the terms of an August 2005 consent order, according to the Allegheny County Health Department.

Jim Thompson, the Health Department's Air Quality Program enforcement chief, said the company has completed repairs on 25 of its 56 coke ovens as required by the consent order and achieved compliance with the county's tough coke facility emissions standards.

"They've addressed all of the violations; however, there are still infrequent emissions violations that occur from time to time," said Mr. Thompson at a public meeting in Bellevue last night.

"The county, company and citizens have to be diligent to ensure continued compliance because coking works by their nature are subject to frequent breakdowns."

The 2005 order included a $200,000 fine and required a host of equipment and operational improvements. It was the capstone on Shenango's 25-year history of air pollution control violations.

The company signed federal consent orders in 1980, 1993 and 2000 that aimed to correct its emissions problems. Since the late 1990s, the coke maker has been fined more than $2 million for violating the conditions of those orders.

Myron Arnowitt, Western Pennsylvania director of Clean Water Action, which helped document some of the smoke violations in spring 2005, said the group has been fielding more resident complaints about emissions from the coke works in recent weeks.

"We have concerns about the consistency of the company's compliance. Some problems have only recently been fixed," Mr. Arnowitt said. "We don't want to return to those problems in 2007 and 2008."

Emissions of toxic gases from the coke oven doors were in compliance with county health standards only 6 percent of the time in the last part of 2005, but have approached 100 percent in August and September of this year.

Shenango employs about 165 people and can produce about 380,000 tons of coke a year.