This dataset includes nearly 80 components of ordinances that govern the maintenance and inspection of existing housing, including provisions for habitability, injury, mold and pest prevention, air quality and lead and other toxins, including tobacco smoke, in the home. The ordinances presented here cover unincorporated King County, and all 39 municipalities therein.
Childhood lead poisoning is widely recognized as one of the most significant environmental health problems impacting children in the United States, as well as many other countries. Lead is one of the longest-known, best-understood, and most well-monitored environmental toxins. Most (but not all) children with elevated blood lead levels are exposed to lead through lead hazards in older housing. Local policy approaches aim to reduce childhood lead poisoning by reducing the prevalence of lead hazards in high-risk housing, and do so by improving maintenance practices and controlling lead hazards.
This study considers mandates requiring the partial replacement of lead pipes and the potential impact on rates of lead in the water.
The cumulative mass of lead release indicated that a typical partial replacement configuration did not provide a net reduction in lead when compared to 100 percent lead pipe. The partially replaced service line configuration also had a much greater likelihood of producing water with "spikes" of lead particulates at higher flow rates, while tending to produce lower levels of lead at very low flow rates.