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The Illinois Environmental Protection Agency has issued an Areawide Air Pollution Action Day for Sunday, July 19th. This is in addition to the ongoing Chicago Air Pollu tion Action Day in effect today July 18th. This alert includes all of Illinois’ Air Quality Index (AQI) forecast sectors, except Metro-East St. Louis. Visit www.AirNow.gov to stay up to date on current conditions. 

Conversion Factors

Energy:

1 BTU/hour = 0.293 Watts
1 Megawatt = 3,413,000 BTU/hour
1 boiler horsepower (BHP) = 33520 BTU/hr
1 boiler horsepower (BHP) = 9803 Watts
1 lb/mmbtu = 1.548 kg/MW-hr
1 lb steam/hr (300 psi, saturated) = 1202 BTU/hr
1 million ft 3 = 10,000 therms
1 therm = 100,000 BTU
1 therm = 100 ft 3natural gas (approximately)
1 ft 3 natural gas = 1000 BTU (approximately)
1 Pound of fuel oil = 19,000 BTU (approximately)

Pressure:

1 atmosphere = 14.69 psi
1 atmosphere = 760 millimeters of mercury
1 psi = 0.068 atmospheres
1 millimeter of mercury = 0.00132 atmospheres
1 millimeter of mercury = 0.0193 psi

Volume:

1 ft 3 (liquid) = 7.48 gallons
1 barrel = 42 gallons

Weight:

1 kilogram = 1000 grams = 2.205 lbs
1 pound = 7000 grains
1 pound = 0.454 kilograms = 454 grams
1 ton = 2000 pounds

Other:

Density of water = 8.337 lb/gal