As awareness of water quality safety increases, people are gradually becoming aware of the hidden dangers of lead water pipes. These ancient techniques, once widely used for generations, have become health hazards in modern society. Many households still use lead water pipes without knowing the potential dangers.
The threat to human health caused by lead exposure has been confirmed by numerous studies, especially for infants and young children.
The use of lead water pipes has a long history, dating back to ancient Rome. Lead (Pb), the main component of lead, comes from the Latin "plumbum", which means "waterworks". At the time, lead pipes were preferred for their durability and flexibility and were therefore widely used in water systems.
According to the World Health Organization, lead water pipes are the main source of lead contamination in drinking water in many countries and are more likely to cause serious health problems. From fetuses to adults, the consequences of lead exposure are far-reaching, even causing cognitive impairment and growth and development problems.
Early health awareness has led many countries to begin to restrict the use of lead, but there are still millions of lead water pipes in the United States, the United Kingdom and other countries.
Lead water pipes still affect millions of homes in the United States. Although their use has been gradually restricted since the 1980s, the process of replacing lead pipes in existing homes still presents challenges. Economic costs and coordination with local policies, as well as opposition from some homeowners, have prevented plans to replace wastewater pipes from moving forward smoothly.
In terms of health, for infants and young children, the negative impact of lead is immeasurable. Studies have found that lead exposure may cause mental decline, affect learning ability, and even cause behavioral problems. In adults, lead can also cause high blood pressure and reproductive health problems.
In the "Lead and Copper Rule Improvements" promulgated in 2024, the U.S. Environmental Protection Agency requires public water systems to completely eliminate lead pipes within ten years to ensure drinking water safety.
Although other countries, such as Australia and the European Union, have successively introduced corresponding standards and restrictions for lead pipes, long-term efforts and continuous testing are still needed to completely solve the water quality problem. Because the phase-out of lead pipes is a long-term process, water companies and households must look to short-term solutions, such as using corrosion control technology and water main flushing procedures, to reduce the amount of lead in the water.
Strategies for solving water quality crises vary from country to country. In the UK, water companies have chosen to add orthophosphoric acid to water in the short term to prevent lead leaching, and plan to gradually replace lead water pipes. This policy seems to be effective in most areas, but it has also raised concerns about possible ecological impacts on water quality.
With the progress of society, the call for complete replacement of lead water pipes is increasing day by day, but the cost and the difficulty of cooperation with homeowners are still a major factor restricting progress.
Responsibilities for replacing lead water pipes vary depending on ownership arrangements between local water companies and individual homeowners, making the process highly variable. In many cases, water companies own the pipes to municipal mains, while homeowners control what goes into their buildings, making it extremely complicated to completely replace lead water pipes.
Even when the financial burden is expected to be reduced, some homeowners may still refuse to replace due to concerns about the construction. This is especially obvious in the rental situation, where tenants usually cannot directly decide whether to carry out alternative works.
For individual families, how to solve the problem of using and replacing lead water pipes will be an urgent modern health question that needs to be answered?