INTERAGENCY FIELD MANUAL FOR THE COLLECTION OF
WATER-QUALITY DATA
Conversion Factors, Abbreviations, and Acronyms
Conversion Factors
Abbreviations
Acronynms
Conversion Factors
English to Metric
| Abbreviation |
From |
Multiply by |
To |
Abbreviation |
| Length |
| in. |
inches |
2.5 |
centimeters |
cm |
| ft |
feet |
30 |
centimeters |
cm |
| ft |
feet |
0.3048 |
meters |
m |
| yd |
yards |
0.9 |
meters |
m |
| mi |
miles |
1.609 |
kilometers |
km |
| Area |
| in2 |
square inches |
6.5 |
square centimeters |
cm2 |
| ft2 |
square feet |
0.0929 |
square meters |
m2 |
| yd2 |
square yards |
0.8 |
square meters |
m2 |
| mi2 |
square miles |
2.59 |
square kilometers |
km2 |
| ac |
acres |
4,047 |
square meters |
m2 |
| ac |
acres |
0.4 |
hectares |
ha |
| Volume |
| pt |
pints |
0.47 |
liters |
L |
| qt |
quarts |
0.95 |
liters |
L |
| gal |
gallons |
3.8 |
liters |
L |
| gal/min |
gallons per minute |
6.309 x 10-5 |
cubic meters per second |
m3/s |
| ft3 |
cubic feet |
0.0283 |
cubic meters |
m3 |
| yd3 |
cubic yards |
0.76 |
cubic meters |
m3 |
| cfs or ft3/s |
cubic feet per second |
0.0283 |
cubic meters per second |
m3/s |
| cfs or ft3/s |
cubic feet per second |
0.646 |
million gallons per day |
Mgal/d |
| Mgal/d |
million gallons per day |
0.0438 |
cubic meters per second |
m3/s |
| Mgal/d |
million gallons per day |
1.547 |
cubic feet per second |
cfs or ft3/s |
| Temperature |
| °F |
degrees Fahrenheit |
5/9 (°F)-32 |
degrees Celsius |
°C |
| Concentration |
| ppm |
parts per million |
1 |
milligrams per liter |
mg/L |
Metric to English
| Abbreviation |
From |
Multiply by |
To |
Abbreviation |
| Length |
| cm |
centimeters |
0.4 |
inches |
in. |
| m |
meters |
3.281 |
feet |
ft |
| m |
meters |
1.1 |
yards |
yd |
| km |
kilometers |
0.6214 |
miles |
mi |
| Area |
| cm2 |
square centimeters |
0.16 |
square inches |
in2 |
| m2 |
square meters |
10.76 |
square feet |
ft2 |
| m2 |
square meters |
1.2 |
square yards |
yd2 |
| km2 |
square kilometers |
0.3861 |
square miles |
mi2 |
| m2 |
square meters |
0.0002471 |
acres |
ac |
| ha |
hectares (10,000 m2) |
2.5 |
acres |
ac |
| Volume |
| mL |
milliliters |
0.03 |
fluid ounces |
fl oz |
| L |
liters |
2.1 |
pints |
pt |
| L |
liters |
1.06 |
quarts |
qt |
| L |
liters |
0.26 |
gallons |
gal |
| m3 |
cubic meters |
35.31 |
cubic feet |
ft3 |
| m3 |
cubic meters |
1.3 |
cubic yards |
yd3 |
| m3/s |
cubic meters per second |
35.31 |
cubic feet per second |
cfs or ft3/s |
| m3/s |
cubic meters per second |
22.821 |
million gallons per day |
Mgal/d |
| Temperature |
| °C |
degrees Celsius |
9/5 (°C)+32) |
degrees Fahrenheit |
°F |
| Concentration |
| mg/L |
milligrams per liter |
1 |
parts per million |
ppm |
Abbreviations
ft/s, foot per second
g, gram
gal/min, gallon per minute
g/L, gram per liter
in., inch
L/min, liter per minute
µg/L, microgram per liter (equivalent to parts per billion)
µm, micrometer
meq/L, milliequivalent per liter
mg/L, milligram per liter (equivalent to parts per million)
mL, milliliter
mm, millimeter
µS/cm, microsiemens per centimeter
N, normality
ppb, parts per billion (equivalent to microgram per liter)
ppm, parts per million (equivalent to milligram per liter)
Acronyms
ADEQ, Arizona Department of Environmental Quality
ANC, acid-neutralizing capacity
ASTM, American Society for Testing and Materials
BOD, biochemical oxygen demand
BOR, U.S. Bureau of Reclamation
CFC, chlorofluorocarbon
CH/DH, clean hands/dirty hands
CNA, Comision Nacional del Agua
CPR, cardiopulmonary resuscitation
CRWQCB, California Regional Water Quality Control Board
DIW, deionized water
DO, dissolved oxygen
DOC, dissolved organic carbon
DPD, N,N-diethyl-p-phenylenediamine
DQO, data-quality objective
EDI, equal-discharge increment
EWI, equal-width increment
FAS, ferrous ammonium sulfate
FISP, Federal Interagency Sedimentation Project
GIS, geographic information system
GPS, global positioning system
IBWC, International Boundary and Water Commission
IPT, inflection point titration
ITFM, Intergovernmental Task Force for Water-Quality
Monitoring
MF, membrane filtration
MPN, most probable number
MRL, minimum reporting level
MSDS, Material Safety Data Sheets
NGO, nongovernmental organizations
PAO, phenylarsineoxide
PCB, polychlorinated biphenyls
PFD, personal flotation device
PVC, polyvinyl chloride
QA/QC, quality assurance/quality control
SOC, suspended organic carbon
TNRCC, Texas Natural Resource Conservation Commission
TOC, total organic carbon
USEPA, U.S. Environmental Protection Agency
USGS, U.S. Geological Survey
VCF, vertical at centroid of flow
VOC, volatile organic compound
| IFM home page | USGS | EPA |
| Back to Table of Contents | http://tx.usgs.gov/ |
Contact Dee Lurry
for more information