An ordinance that will go into effect July 1 will require carbon monoxide detectors in Rockville homes built prior to 2008 that have a fuel-burning appliance or attached garage.

The city ordinance, passed by the Mayor and Council in November, incorporates legislation passed by the county in October. The July 1 enactment date was intended to allow residents time to understand and comply with the new requirement.

Specifically, the county bill requires owners of single-unit, two-unit and townhouse dwelling units, with fuel-burning appliances or attached garages that were permitted before Jan. 1, 2008, to install and maintain carbon monoxide alarms.

Since 2008, all new single-family dwellings and townhouses in the state have been required to install carbon monoxide detectors. Exposure to carbon monoxide can cause serious injury or death.

Rockville’s Senior Services Department can help Rockville residents age 60 and older find and install carbon monoxide detectors.

For help with information and referrals to purchase detectors, and assistance with installation, residents age 60 and older can contact senior services home maintenance coordinator Jerry Jones by email at or by phone at 240-314-8819.