Parts Per Billion glossary and government resources

Parts Per Billion : Units commonly used to express contamination ratios, as in establishing the maximum permissible amount of a contaminant in water, land, or air. [Environmental Protection Agency]

Database fields in category Chemical analysis
U_XX_PPB, Show statistics for this field, Concentration of uranium in water,

Database fields, all categories
...in parts per billion, determined by fluorescence spectroscopy. U_MS_PPB,

ATSDR - PHA - Adams County Quincy Landfills 2 & 3, Quincy, Adams ...
...ppb = parts per billion Bold results indicate monitoring wells in areas of

help me @ phila.gov database
Other substances, such as trihalomethanes, are measured at parts-per-billion

AFRP - ppb parts per billion
The Anadromous Fish Restoration Program (AFRP) - ppbparts per billion.

Siberian Forest Fires Affected Seattle Air Quality, Research Shows
On June 6, an ozone-monitoring site near Seattle registered an 8-hour average

EPA Region 7 - Understanding Units of Measurement
...per million (ppm) or parts per billion (ppb) by using a conversion factor.

Reaching Your Limits
...parts per million (ppm) and parts per billion (ppb) because very small amounts

Determination of low parts per billion levels of amines in urine ...
Determination of low parts per billion levels of amines in urine by liquid

Analysis of mixtures of aminopolycarboxylic acids by chemical ...
Parts per billion of nitrilotriacetic acid in water. Coombs LC, Vasiliades J,

Los Alamos National Laboratory News
RDX was found in concentrations of 12 parts per billion (micrograms per liter),

NOAA CMDL CCGG logo Climate Monitoring and Diagnostics Laboratory ...
...are reported in units of nanomol mol-1 (10-9 mol CH4 per mol of dry air (nmol

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