A chloride test measures the level of chloride in your blood or urine. Chloride is one of the most important Reference electrolytes Opens New Window in the blood, along with sodium, potassium, and calcium. Chloride helps keep the amount of fluid inside and outside of your cells in balance.
The normal values listed here—called a reference range—are just a guide. These ranges vary from lab to lab, and your lab may have a different range for what’s normal. Your lab report should contain the range your lab uses. Also, your doctor will evaluate your results based on your health and other factors. This means that a value that falls outside the normal values listed here may still be normal for you or your lab. Blood chloride levels are checked more often than urine chloride levels. Results are usually available in 1 to 2 days.
96–113 mEq/L (96–113 mmol/L)
|Child (10–14 years):||
64–176 mEq/24 hours (64–176 mmol/day)
|Child (younger than 6 years):||
15–40 mEq/24 hours (15–40 mmol/day)
High chloride levels may be caused by:
- Reference Dehydration Opens New Window, such as from diarrhea or vomiting.
- Eating a lot of salt.
- Kidney disease.
- An overactive Reference parathyroid gland Opens New Window (hyperparathyroidism).
Low chloride levels may be caused by:
- Conditions that cause too much water to build up in the body, such as with syndrome of inappropriate antidiuretic hormone secretion (SIADH).
- Reference Addison's disease Opens New Window.
- A condition that raises the Reference pH Opens New Window of the blood above the normal range (metabolic alkalosis).
- Reference Heart failure Opens New Window.
- Ongoing vomiting.
|By:||Reference Healthwise Staff||Last Revised: Reference March 26, 2012|
|Medical Review:||Reference E. Gregory Thompson, MD - Internal Medicine
Reference Thomas M. Bailey, MD - Family Medicine