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Lead in Urine (24-Hour Collection)

Published: August 9, 2026Updated: August 16, 2026

This test measures the amount of lead found in your urine over a 24-hour period to check for exposure to lead, a toxic metal that can harm your body.

Quick summary

["Assesses long-term lead exposure through urine samples."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
111446-1
Short code
Lead Msmt Ur
Synonyms
Lead Msmt Ur
Category
chemistry
Sample
urine
Container
Sterile urine container
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
10 mL
Stability
Room temperature: 2h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

Why Is This Test Done?

Your healthcare provider may order this test if you have symptoms of lead poisoning (such as fatigue, abdominal pain, or neurological issues), if you work in an environment with lead exposure (e.g., construction, manufacturing), or if you have risk factors like eating contaminated food or living in an older home with lead-based paint.

What to Expect Before the Test

You’ll need to collect all urine for a full 24-hour period in a special container. Drink plenty of water to help flush lead out of your body. Avoid foods or supplements that may interfere with the test results, as instructed by your provider.

How the Test Works

After collecting your urine sample, it is analyzed in a lab to measure lead levels. The test detects lead in the urine by identifying its presence and concentration through specialized laboratory techniques.

What the Results Mean

Higher-than-normal lead levels in urine may indicate recent or ongoing exposure to lead. Your results will be compared to medical guidelines to determine if further action is needed, such as reducing exposure or monitoring your health.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Lead Urine Test

Frequently asked questions

What Are Common Causes of Abnormal Results?
Common causes of elevated lead levels in urine include exposure to lead dust, paint, or contaminated water, especially in children or individuals with weakened immune systems. Occupational hazards, such as working in industries like plumbing or battery manufacturing, can also lead to exposure.
How Long Does It Take to Get Results?
Results from this test are typically available within 1 to 3 business days, depending on your lab’s processing schedule. Your healthcare provider will discuss the findings with you during your follow-up visit.
Can I Drink Water Before the Test?
Yes, you should drink plenty of water throughout the 24-hour collection period to help your body naturally eliminate lead through urine. However, avoid excessive fluids that might dilute the sample too much, as instructed by your provider.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy