Question 1

What is the EPA limit for total nitrate+nitrite in drinking water?

Accepted Answer

The EPA Maximum Contaminant Level (MCL) for total nitrate+nitrite is 10 ppm. Public water systems must keep total nitrate+nitrite below this level.

Question 2

What are the health effects of total nitrate+nitrite in drinking water?

Accepted Answer

The EPA MCL of 10 ppm for combined nitrate and nitrite is a health-protective standard that accounts for the total nitrogen load from both forms. When nitrate and nitrite are both present, their combined effect on methemoglobin formation is

Question 3

Where does total nitrate+nitrite in drinking water come from?

Accepted Answer

Combined nitrate-nitrite contamination is most severe in agricultural regions where synthetic nitrogen fertilizers and animal waste are the dominant sources. The USGS National Water-Quality Assessment found that nitrate exceeded 10 ppm in a

Question 4

How do I remove total nitrate+nitrite from my drinking water?

Accepted Answer

Total Nitrate+Nitrite is effectively removed by: Reverse Osmosis, Anion Exchange, Distillation. Look for NSF-certified filters that explicitly list total nitrate+nitrite reduction.

Total Nitrate+Nitrite in Drinking Water - EPA MCL, Health