| ISU |
Ionic Strength Unit |
| JCU |
Jackson Candle Units |
| JTU |
Jackson Turbidity Units |
| KG/1000GAL |
Kilograms per 1000 gallons |
| KG/BATCH |
Kilograms per batch |
| KG/DAY |
Kilograms per day |
| KG/L |
Kilograms per liter |
| KG/M3 |
Kilogram per meter cubed |
| KG/M3/S |
Kilogram per meter cubed per second |
| KG/MO |
Kilograms per month |
| KG/S |
Kilogram per second |
| KG/YR |
Kilograms per year |
| KM2 |
Square kilometers |
| KNOTS |
Knots |
| L |
Liter |
| L/DAY |
Liters per day |
| LAIU |
Langelier Index Units |
| LB/1000LB |
Pounds per thousand pounds |
| LB/BARREL |
Pound per barrel |
| LB/IN2 |
Pounds per square inch |
| LB/TON |
Pounds per ton |
| LBS |
Pounds |
| LBS/DAY |
Pounds per day |
| LBS/MON |
Pounds per month |
| LBS/YR |
Pounds per year |
| M |
Meter |
| M/S |
Meter per second |
| M2 |
Meter squared |
| M2/S |
Meter squared per second |
| M3 X 10(6) |
Meter cubed (in millions) |
| M3/KG |
Meter cubed per kilogram |
| M3/S |
Meter cubed per second |
| MBAR |
Millibar |
| MD |
Millidarcy |
| MEGAWATTS |
Megawatts |
| MEQ/100G |
Milliequivalents per 100 grams |
| MEQ/G |
Milliequivalents per gram |
| MEQ/KG |
Milliequivalents per kilogram |
| MEQ/L |
Milliequivalents per liter |
| MFL |
Millions of Fibers per Liter |
| MG |
Milligrams |
| MG-MIN/L |
Milligram-minutes per liter |
| MG/CM2 |
Milligrams per centimeter squared |
| MG/DAY |
Milligrams per day |
| MG/FLT |
Milligrams per filter |
| MG/G |
Milligrams per gram |
| MG/KG |
Milligrams per kilogram |
| MG/L |
Milligrams per liter |
| MG/M2 |
Milligrams per square meter |
| MG/M2/DAY |
Milligrams per meter squared per day |
| MG/M3 |
Milligrams per cubic meter (PPBV) |
| MG/ML |
Milligrams per milliliter |
| MG/WIPE |
Milligrams per Wipe |
| MGAL |
Million gallons |
| MGCACO3/KG |
Milligrams of calcium carbonate per kilogram |
| MGCACO3/L |
Milligrams of calcium carbonate per liter |
| MGD |
Millions of gallons per day |
| MGDO/L |
Milligrams dissolved oxygen per liter |
| MGLASMW320 |
mg/L LAS MW 320 |
| MGM |
Millions of gallons per month |
| MGPHEN/L |
Milligrams of phenol per liter |
| MGY |
Millions of gallons per year |
| MILE2 |
Square miles |
| MILES |
Miles |
| MILL FT3 |
Million feet cubed |
| MILLIVOLTS |
Millivolts |
| MILS/CM |
Millisiemens per centimeter |
| MILTIME |
Military Time |
| MIN |
Minutes |
| MJ/CM2 |
Millijoule per centimeter squared |
| ML |
Milliliter |
| ML/100G |
Milliliter per 100 grams |
| ML/L |
Milliliter per liter |
| ML/L/HR |
Milliliter per liter per hour |
| MM |
Millimeter |
| MM/M2/HR |
Millimeter per meter squared per hour |
| MM/S |
Millimeters per second |
| MM/YR |
Millimeter per year |
| MMHG |
Millimeters of mercury |
| MMHOS/CM |
Millimhos (MMHOS) per centimeter |
| MOL % |
Mole percent |
| MON |
Month |
| MPH |
Miles per hour |
| MPN/100G |
Most Probable Number per 100 gram |
| MPN/100ML |
Most Probable Number per 100 milliliters |
| MPN/10G |
Most Probable Number per 10 gram |
| MPN/G |
Most Probable Number per gram |
| MPN/ML |
Most Probable Number per milliliter |
| MRY |
Millirems per year |
| MTON |
Metric Tons |
| MW |
Molecular Weight |
| MW/CM2 |
MilliWatt per square centimeter |
| MWS/CM2 |
Milliwatt second per centimeter squared |
| NAUT.MILE |
Nautical mile |
| NG |
Nanogram |
| NG/CC |
Nanogram per cubic centimeter |
| NG/G |
Nanograms per gram |
| NG/KG |
Nanogram per kilogram |
| NG/L |
Nanogram per liter |
| NG/M3 |
Nanogram per cubic meter |