PITTSBURG -- Parents who host drinking parties for teenagers could get hit with hefty fines and paying for costs associated with the police response under an ordinance the City Council tentatively approved this week to deter underage drinking.

The social host ordinance will come back for a final reading at the council's July 15 meeting. If approved, it would take effect Aug. 14.

Pittsburg would become the second East County city to have such an ordinance. Oakley has a social host ordinance but Antioch and Brentwood do not. Statewide, 40 cities and counties have passed social host ordinances, including unincorporated Contra Costa County, Berkeley, Clayton, Concord, Pleasanton and San Ramon.

Darrion Burgess, a 17-year-old Pittsburg resident, spoke in support of the ordinance.

"I have known kids who have lost friends to alcohol and kids whose own lives have been affected negatively by alcohol," said Burgess, who pointed to a 2010-2011 California Healthy Kids survey that found that 46 percent of Pittsburg youth said their main source of alcohol consumption comes from house parties.

"A social host ordinance would give police officers a valuable tool in cracking down on house parties and keeping adults liable for any underage children that drink under their roof," he said.

No one spoke against the ordinance.

"This ordinance is a very positive thing," said Councilman Pete Longmire, who worked with Vice Mayor Sal Evola and Paullette Segovia, community coordinator for the East County Alcohol Policy Coalition to develop it.

Longmire noted that the city will partner with the Pittsburg Unified School District to get the word out about its provisions.

The ordinance was brought to the council in May, but action was delayed until staff could come up with specific cost recovery provisions associated with police or other emergency response.

"This is an effort to minimize the costs of the public nuisance so that general taxpayer dollars are not paying for a nuisance caused by a select group of people," said the staff report that recommended approval.

Police who respond to an incident involving underage drinking will have one of three options under the ordinance. They can refer the matter to the District Attorney's office for possible prosecution as a misdemeanor punishable by up to six months in the county jail, up to a $1,000 fine, or both. Or police can issue a notice of infraction, which would result in a maximum fine of $500 for each offense.

The third option is for police to issue an administrative citation, where the civil fine would be $500 for a first violation and $1,000 for a second and each additional violation within a 12-month period. The staff report had recommended a $750 civil fine for the second violation and $1,000 for a third and each additional violation.

Mayor Nancy Parent asked that the ordinance be amended to have a $1,000 civil fine for the second and each additional violation when it is brought back for the final reading at the council's July meeting.

"I think it should only be two steps. You need to be told once not to do something, and the second time should be the maximum," she said.

Contact Eve Mitchell at 925-779-7189. Follow her on Twitter.com/EastCounty_Girl.