R RTR AC Members Oct 5, 1998 5,806 0 0 Braddock Heights, MD Feb 8, 2006 #11 The US EPA allows up to 10ppm nitrate-nitrogen, or 44ppm nitrate. The comprehensive list is available at: http://www.epa.gov/OGWDW/mcl.html
The US EPA allows up to 10ppm nitrate-nitrogen, or 44ppm nitrate. The comprehensive list is available at: http://www.epa.gov/OGWDW/mcl.html
