The Effects of Lead Exposure in Adults and Children — and the History of Lead in Baltimore City

Lead exposure remains one of the most serious environmental health issues in American cities. Although major progress has been made over the past several decades, lead poisoning continues to affect families — particularly in older housing stock.

Understanding how lead affects the body — and how it became such a major issue in places like Baltimore — is critical for protecting public health today.

What Is Lead and Why Is It Dangerous?

Lead is a naturally occurring heavy metal that was widely used in:

• Residential paint

• Plumbing pipes and solder

• Gasoline (until the 1980s)

• Industrial manufacturing

Because lead is toxic to humans, even small amounts can cause serious health problems. There is no safe level of lead exposure, especially for children.

Effects of Lead Exposure in Children

Children are especially vulnerable to lead poisoning because:

• Their brains and nervous systems are still developing

• They absorb lead more easily than adults

• Hand-to-mouth behavior increases exposure risk

Short-Term Effects

• Developmental delays

• Learning difficulties

• Irritability

• Loss of appetite

• Fatigue

• Stomach pain

Long-Term Effects

Lead exposure in childhood can cause permanent neurological damage, including:

• Reduced IQ

• Attention disorders

• Behavioral problems

• Speech and language delays

• Impaired academic performance

At higher levels, lead poisoning can cause seizures, coma, and in severe cases, death.

Even low levels of exposure have been linked to lifelong cognitive and behavioral challenges.

Effects of Lead Exposure in Adults

While children are at higher risk for neurological damage, adults can also suffer serious health consequences.

Common Effects in Adults

• High blood pressure

• Kidney damage

• Joint and muscle pain

• Headaches

• Memory and concentration problems

• Mood disorders

In pregnant women, lead exposure can result in:

• Miscarriage

• Premature birth

• Low birth weight

• Developmental issues in the baby

Long-term exposure may also contribute to cardiovascular disease.

How Lead Enters the Body

Lead exposure most commonly occurs through:

• Ingestion of lead dust (from deteriorating paint)

• Inhaling airborne lead particles

• Drinking water from lead plumbing

• Soil contamination near older buildings

Homes built before 1978 are most at risk because lead-based paint was commonly used before it was banned for residential use.

The History of Lead in Baltimore City

Baltimore’s lead problem is deeply connected to its housing history.

Early 20th Century Use

In the late 1800s and early 1900s, lead-based paint was heavily marketed as durable and washable. It became widely used throughout Baltimore’s rowhomes and multi-family properties.

At the time, the health risks were not widely regulated, despite early medical warnings.

Mid-20th Century Urban Housing

Baltimore experienced significant housing expansion during the early-to-mid 1900s. Much of the city’s iconic rowhouse stock was built before 1950 — decades before the federal government restricted lead paint use.

This created widespread long-term exposure risks in older neighborhoods.

Federal Ban in 1978

In 1978, the U.S. government banned lead-based paint in residential properties. However, existing homes still contained layers of lead paint beneath newer coatings.

Because Baltimore has one of the oldest housing stocks in the country, lead hazards remained prevalent long after the ban.

Public Health Crisis and Litigation

By the 1980s and 1990s, Baltimore had one of the highest rates of childhood lead poisoning in the United States.

Thousands of children were diagnosed with elevated blood lead levels, particularly in low-income neighborhoods with aging housing.

This led to:

• Increased public health screening

• Stricter rental property regulations

• Lead abatement programs

• Legal action against paint manufacturers

• Stronger landlord compliance requirements

Maryland eventually enacted the Lead Risk Reduction law to reduce hazards in rental housing.

Current Lead Regulations in Baltimore

Today, rental properties built before 1978 must comply with Maryland’s lead safety requirements before being rented.

Landlords must typically obtain:

• Lead Risk Reduction Certificates

• Clearance testing

• Ongoing compliance documentation

These regulations are enforced in coordination with the Baltimore City Department of Housing & Community Development and state health authorities.

Failure to comply can result in:

• Rental license denial

• Civil penalties

• Legal liability

• Inability to collect rent in court

Why Lead Safety Still Matters

Although blood lead levels have declined significantly over the past several decades, lead exposure has not been eliminated.

Older housing, deteriorating paint, renovation work, and poor maintenance practices can still create hazardous dust conditions.

Because lead damage is often irreversible, prevention remains the most effective strategy.

Protecting Families and Property Owners

For property owners in older cities like Baltimore:

• Regular inspections are critical

• Proper maintenance reduces liability

• Certified lead professionals should handle remediation

• Documentation and compliance protect both tenants and landlords

For families:

• Routine pediatric screening is important

• Report peeling paint to landlords promptly

• Use wet-cleaning methods to reduce dust

• Avoid unsafe DIY renovations

In Essence

Lead exposure is a preventable environmental health hazard with serious consequences — particularly for children. Baltimore’s history of aging housing stock and early lead paint use created a long-term public health challenge that continues to require vigilance today.

Through stronger regulations, inspections, and public awareness, the risks can be significantly reduced.

Understanding the history, and the health effects, is the first step toward ensuring safer housing for future generations.