The private member's bill faces its final vote in Queen's Park later today and is expected to pass, though it has lingered on politicians' desks for five years.
Conservative Ernie Hardeman is behind the bill and says people should know how important it is to have a CO detector in their homes. He says in the past 10 years, 250 Ontarians have died of carbon monoxide poisoning.
Not a single person has spoken against or voted against the bill, though it has nonetheless died and been reintroduced five times.
Hardeman first introduced it after carbon monoxide killed Woodstock OPP officer Laurie Hawkins, her husband, and both their children in their home — which didn't have a CO detector.
Hawkins' uncle, John Gignac, has championed the cause since those deaths.
"I wish I could turn the clock back and put a CO alarm in my niece's house," Gignac told CBC News.