Question

normal range of nitrates in potable water is​

Answer 1

Answer:

In the USA, nitrates are present in most surface water and groundwater supplies at levels below 4 mg/l, with levels exceeding 20 mg/l in about 3% of surface waters and 6% of groundwaters.

Answer 2

Answer:

In U. S. A , nitrates are present inost surface water and groundwater supplies at level below 4 mg/l, with levels exceeding 20mg/ l about 3 percent of surface water and 6 Percent of ground water.

Explanation:

HOPE THIS ANSWER IS HELPFUL AND PLS LIKE IT AS WELL AS MAKE IT AS A BRILLIANT ANSWER