LabInformationLab tests, explained

Mercury, Urine Test in California

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. Across California, part of Pacific, the mercury, urine test can be ordered directly and collected at a certified site — no referral required.

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.

Requesting the Mercury, Urine Test in California

Order online, choose a certified collection site in California, and review results through a secure portal. No referral is required, and orders are processed confidentially. With coastal metros, inland towns, and rural counties with very different access to testing, it pays to schedule your collection in advance.

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.

Mercury, Urine Test by city in California

All testing in California →   Full Mercury, Urine Test guide →