(KNZA)--The city of Highland is informing customers that the city's water may have high levels of nitrate.

According to a notice issued by the city, a water sample collected on March 23 showed a nitrate level of 13 milligrams per liter, which exceeds the federal maximum contaminant level of 10 milligrams per liter.

The release says confirmation samples are being collected to determine if there is a nitrate problem with the water quality. The city expect to know the results within the next 30 days.

In the meantime, as a precaution, customers are advised not to give the water to infants or use it to make infant formula, as children below the age of 6 months could become seriously ill.

In addition, the water should not be boiled.

Adults and children older than six months can drink the water. However, if you are pregnant or have specific health concerns, you may wish to consult your doctor.