Leaching Lead from Pipes

Lead in Flint Water

Introduction

Lead is a heavy metal that can be found in a variety of settings, from old paint to drinking water. Although it is no longer used in products like paint and gasoline, lead exposure is still a major public health concern, as it can lead to serious health problems, including cancer. Studies have shown that lead exposure can increase the risk of several types of cancer, including brain cancer, ovarian cancer, and breast cancer. In addition, lead exposure has been linked to an increased risk of thyroid cancer and leukemia. Exposure to lead can also cause other health problems, such as high blood pressure and kidney damage. Consequently, it is important to take steps to avoid exposure to lead, especially if you are pregnant or have young children. This paper will discuss the carcinogen lead with respect to the Flint water crisis. Flint, Michigan made national headlines in 2015 when it was discovered that the city’s water supply was contaminated with lead (Denchak, 2018). While the toxicological effects of lead exposure are well-known, the Flint water crisis highlights the potential for even low levels of lead to cause serious health problems.

The Flint Water Crisis

The Flint water crisis is a public health disaster that began in 2014, when the City of Flint changed its water source from Lake Huron to the more polluted Flint River. This change exposed residents to high levels of lead, a carcinogen. Although lead exposure can occur through a variety of channels, the main source of lead exposure in Flint was drinking water contaminated with lead leaching from old pipes. Lead is a highly toxic metal that can cause serious health problems, including developmental delays, learning difficulties, andbehavioral problems (Lead Exposure Limits, 2018).

The United States Environmental Protection Agency (EPA) has set maximum allowable levels of lead in drinking water at 15 ppb (parts per billion) (Lead Exposure Limits, 2018). However, some samples of Flint River water contained lead levels exceeding 1,000 ppb - more than 100 times the EPA limit (Pieper et al., 2018). As a result of the Flint water crisis, thousands of children were exposed to high levels of lead, putting them at risk for lifelong health problems. Although the use of lead pipes has declined in recent years, there are still an estimated 6 million homes nationwide that receive water through lead pipes. As the Flint water crisis demonstrates, even low levels of lead exposure can have serious consequences for public health.

Toxicological Effects

Studies have linked lead exposure to a variety of neurological and developmental issues, including learning disabilities, ADHD, and reduced IQ scores. In addition, lead has been shown to increase the risk of high blood pressure, heart disease, and kidney damage. Some of the most common symptoms, whether observed or not, of lead poisoning include fatigue, headaches, stomach pain, and behavioral problems. In extreme cases, lead poisoning can cause seizures, coma, and death (International Agency for Research on Cancer (IARC), 1998). The residents of Flint were exposed to this carcinogen without realizing it, and, as a result, the Flint water crisis is a tragic reminder of the dangers of lead exposure, and the need for continued vigilance in protecting our children and our communities from this potent toxin.

Models Used for Assessing Cancer Risks

There are a number of different models that can be used for assessing cancer risks. The most commonly used model is the Linear-no-threshold (LNT) model, which assumes that there is a direct linear relationship between exposure to ionizing radiation and the risk of developing cancer. This model has been extensively studied and supported by a large body of scientific evidence. However, some critics have argued that the LNT model overestimates the risks associated with low levels of radiation exposure (Roberts et al., 2015).

An alternative model that has been proposed is the hormesis model, which suggests that low levels of radiation exposure may actually have beneficial health effects. This model is more controversial, and more research is needed in order to confirm its validity. Regardless of which model is used, it is important to remember that cancer risks are always present, and every effort should be made to minimize one's exposure to ionizing radiation.

Conclusion

The Flint water crisis began in 2014 when the city switched its water source from Lake Huron to the Flint River as a cost-saving measure. However, the Flint River water was highly corrosive and it caused lead to leach from the pipes into the drinking water. As a result, many residents were exposed to high levels of lead, which can cause serious health problems. The crisis gained national attention in 2015, and the city has since switched back to using water from Lake Huron. However, the damage to the pipes has already been done, and it will take many years to repair the damage and get the lead out of the water supply. In the meantime, residents are being advised to use filtered water for drinking and cooking.