MISSISSIPPI
Region 4 of the U.S. EPA has granted region wide approval for the use of LDO for reporting purposes. To use, contact your NPDES permit regulator. » LDO® ASTM Region 4 Approval Letter » Hach Method 10360 » EPA Hach method Approval Letter » ASTM Standard D888-05 Approval Letter » EPA/ASTM Validation Study
Larry Murphy	(662) 234-3733