No Safe Level: Childhood Lead Exposure in Older Rental Housing and the Public Health Nurse's Response
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RN to BSN Program, Aspen University
N493: Community Health II
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Month Day, Year
No Safe Level: Childhood Lead Exposure in Older Rental Housing and the Public Health Nurse's Response
Environmental health examines how the places where people live, work, and play affect their health. Few environmental hazards show that connection as clearly as lead. Lead paint was banned for residential use in the United States in 1978, but millions of older homes still contain it, and as paint deteriorates it becomes dust that young children swallow through ordinary hand-to-mouth behavior. This paper reviews the evidence on low-level lead exposure, explains current screening and case management standards, applies them to a composite case of a toddler living in an older rental home, and describes the public health nurse's role at the individual, family, and community levels.
Why Low-Level Exposure Matters
Lead harms the developing brain at levels once considered safe. An international pooled analysis of seven prospective cohort studies, including 1,333 children, found that blood lead concentrations well below the levels that prompted action at the time were associated with lower intelligence test scores, and that the decline in IQ was steeper at the lowest levels of exposure than at higher levels (Lanphear et al., 2005). The authors concluded that no threshold for these effects could be identified. Because intellectual deficits from lead are largely permanent, the only effective strategy is prevention.
The Flint, Michigan, water crisis showed how quickly exposure can change for a whole community. After the city switched its water source in 2014, the percentage of children with elevated blood lead levels nearly doubled, from 2.4 percent to 4.9 percent, with the largest increases in socioeconomically disadvantaged neighborhoods (Hanna-Attisha et al., 2016). Lead exposure follows old housing, old pipes, and poverty, which makes it an environmental justice issue as much as a clinical one.
Screening and the Blood Lead Reference Value
Because lead poisoning usually causes no symptoms at the levels most children experience, screening is the only way to find it. Federal public health guidance relies on a blood lead reference value to identify children with higher levels than most U.S. children. Federal health officials lowered the value in 2021 from 5 to 3.5 micrograms per deciliter, a figure set so that only the highest 2.5 percent of 1- to 5-year-olds in national survey data exceed it (Ruckart et al., 2021). The reference value is not a safe level; it is a trigger for follow-up. Children enrolled in Medicaid are required to be tested at 12 and 24 months, and many states require or recommend testing for other children at high risk, such as those living in housing built before 1978.
A Composite Case
Two-year-old J. is a composite child created for this paper. At a routine well-child visit, his capillary blood lead test was 12 micrograms per deciliter, and a confirmatory venous test was 11. He lives with his mother and 5-year-old sister in a rented two-family house built in 1925. His mother reports that the window frames in his bedroom are peeling and that he often stands at the window sill watching the street. He eats a limited diet with little milk or meat. The pediatric clinic reports the result to the county health department, and the case is assigned to the public health nurse.
Public Health Nursing Case Management
Within days, the nurse makes a home visit. The visit has four purposes. First, the nurse completes an exposure history, asking about the home's age and condition, recent renovations, parents' occupations and hobbies, imported spices, cosmetics, or remedies, and where the child spends time, including relatives' homes. Second, the nurse coordinates an environmental investigation by the health department's environmental health specialist, who tests paint, dust, and soil and identifies the window sills and wells as likely sources.
Third, the nurse teaches the family ways to reduce exposure immediately, before the source is repaired: wet-wiping window sills and floors, washing the child's hands and toys often, keeping him away from peeling areas, and using cold tap water for drinking and cooking. The nurse also discusses nutrition, since adequate iron and calcium reduce lead absorption, and refers the family to the WIC nutrition program, which provides iron-rich foods and milk for young children. Fourth, the nurse arranges testing for the 5-year-old sister, a developmental screening for J., and follow-up blood lead testing on the schedule the clinician recommends until his levels decline.
The nurse also works on the source. The health department notifies the landlord of the hazards found, and the nurse helps the family understand their rights as tenants and connects them with a local program that funds lead hazard control in rental housing. Until repairs are complete, the family is advised about temporary relocation options if work will disturb paint, since unsafe renovation can raise lead levels further.
Community and Policy Level
A single case is often a sentinel for many. The public health nurse reviews the addresses of other children with elevated levels and finds that several live within a few blocks of J. in similar older rental housing. That pattern supports community-level action: targeted screening outreach in the neighborhood through child care centers and churches, education for landlords and contractors on lead-safe work practices, and advocacy before the city council for a proactive rental inspection program that requires lead-safe certification of older rental units before a new family moves in. Such programs shift the burden from families discovering lead after their child is harmed to owners preventing exposure in advance, which is the direction the evidence on low-level exposure demands.
Conclusion
Lead poisoning is entirely preventable, yet it continues to harm children, most often those in older, poorly maintained rental housing. The evidence shows that even low levels of exposure reduce intellectual function and that no safe threshold has been found, and the national reference value now prompts action at 3.5 micrograms per deciliter. Public health nurses stand at the center of the response: they manage individual cases through home visits, education, and coordination with environmental specialists, and they use what they see in those homes to push for policies that remove lead before the next child is exposed.
References
Hanna-Attisha, M., LaChance, J., Sadler, R. C., & Champney Schnepp, A. (2016). Elevated blood lead levels in children associated with the Flint drinking water crisis: A spatial analysis of risk and public health response. American Journal of Public Health, 106(2), 283-290. https://doi.org/10.2105/AJPH.2015.303003
Lanphear, B. P., Hornung, R., Khoury, J., Yolton, K., Baghurst, P., Bellinger, D. C., Canfield, R. L., Dietrich, K. N., Bornschein, R., Greene, T., Rothenberg, S. J., Needleman, H. L., Schnaas, L., Wasserman, G., Graziano, J., & Roberts, R. (2005). Low-level environmental lead exposure and children's intellectual function: An international pooled analysis. Environmental Health Perspectives, 113(7), 894-899. https://doi.org/10.1289/ehp.7688
Ruckart, P. Z., Jones, R. L., Courtney, J. G., LeBlanc, T. T., Jackson, W., Karwowski, M. P., Cheng, P.-Y., Allwood, P., Svendsen, E. R., & Breysse, P. N. (2021). Update of the blood lead reference value: United States, 2021. MMWR. Morbidity and Mortality Weekly Report, 70(43), 1509-1512. https://doi.org/10.15585/mmwr.mm7043a4
How this N 493 Module 5 example is structured
Environmental health is one of the core concepts named in N493's catalog description, and in many sections a module asks for a paper on an environmental hazard, its health effects and the community health nurse's role. Aspen does not publish module deliverables, so check your classroom for the exact prompt. This example builds the evidence first, explains the screening standard accurately, applies it to one composite child, details the nurse's case management step by step and then scales up to community and policy action.
N493 Module 5 questions, answered
What does N493 Module 5 usually ask for?
Environmental health is a named topic in N493, and a module in the course commonly asks for a paper on an environmental health hazard, who it affects, how it is assessed and what community health nurses do about it. Aspen does not publish module deliverables, so your classroom's instructions set the exact requirements.
What is the current blood lead reference value?
The CDC lowered it to 3.5 micrograms per deciliter in 2021, based on the 97.5th percentile of blood lead levels in U.S. children aged 1 to 5. It is a level that triggers follow-up, not a safe level, which is a distinction worth making clearly in your paper.
How do I show levels of nursing practice in an environmental paper?
Move from the individual to the family to the community and policy. The sample starts with a home visit for one child, includes the sibling and household changes, then uses a cluster of cases to argue for neighborhood screening and a rental inspection program.
Write yours, or have the desk draft it
This paper is an original model document written by our desk, not a submitted student paper and not an official Aspen University document. Read it for the moves, then write your own to the instructions in your classroom. If you want one built to your exact prompt and rubric, the first custom sample is free and arrives in 24 to 48 hours.