Mercury, Urine Test
Below is a plain-language overview of the mercury, urine test. The mercury, urine test measures the amount of mercury excreted in urine, primarily reflecting recent exposure to certain forms of mercury. It is often ordered when someone has symptoms or a history of possible mercury exposure from sources like certain fish, industrial settings, or dental work.
- Sample type
- urine
- Category
- Heavy Metal
- Turnaround
- 1-3 business days
- Price
- $229
- Referral
- Not required
The mercury, urine test measures the amount of mercury excreted in urine, primarily reflecting recent exposure to certain forms of mercury. It is often ordered when someone has symptoms or a history of possible mercury exposure from sources like certain fish, industrial settings, or dental work.
What it measures
- Urine mercury concentration — The level of mercury in a urine sample, usually reported in micrograms per liter (µg/L).
- 24-hour urine mercury — If collected over 24 hours, the total mercury excreted in a day, which may give a better picture of exposure.
- Creatinine (sometimes) — A substance used to adjust mercury levels for urine concentration, helping account for how dilute the sample is.
Who it is for
A doctor may order this test if you have symptoms like tremors, memory problems, or numbness that could be linked to mercury, or if you work in a job with known mercury exposure.
Preparation
No special preparation is usually needed. You may be asked to avoid certain seafood for a day or two before the test, depending on your doctor's instructions.
Results and what they mean
Results are reported as a number with a reference range, but what is considered normal can vary by lab and by the type of mercury exposure. Only a clinician can interpret your results in the context of your symptoms, exposure history, and other tests. This information is not medical advice.
How to order this test
- Choose the test and place a confidential order online.
- Select a certified collection site and pick a time that suits you.
- Have your specimen collected — most draws take only a few minutes.
- Review results in a secure portal, typically within 1–3 days.
Preparation, hours, and pricing vary by site; confirm details directly with the lab before your visit.
Availability by state
Direct-access online ordering for the mercury, urine test is available in most states. It is currently unavailable in 6 states:
Everywhere else you can order confidentially and collect your sample at a certified site. Browse by state →
Frequently asked questions
Is this test painful?
No, it only requires providing a urine sample, which is painless.
How long does it take to get results?
Typically 1 to 3 business days, but it may vary by laboratory.
Can I eat before the test?
Usually yes, unless your doctor gives you specific instructions to fast or avoid certain foods.
Does a high result always mean mercury poisoning?
Not necessarily. Many factors affect urine mercury levels, and a doctor will consider your overall health and exposure history.