||Water & air quality trends in Region 8 /
Entzminger, Thomas A. ;
Sotiros, Richard ;
Levene, Barry F. ;
Tabor., William H. ;
||Environmental Protection Agency, Denver, Colo. Surveillance and Analysis Div.
|| Environmental Protection Agency,
Great Plains--Environmental conditions. ;
Water quality--Great Plains. ;
Air quality--Great Plains. ;
United States.--Environmental Protection Agency.--Region VIII. ;
Air pollution ;
Water pollution ;
Data bases ;
North Dakota ;
South Dakota ;
Region 8 ;
Water quality ;
Air quality ;
Air pollution sampling ;
Water pollution sampling ;
Storage and retrieval of water quality data ;
Storage and retrieval of aerometric data ;
TDS(Total Dissolved Solids)
||Region 8 Technical Library/Denver,CO
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||v, 143 pages : maps ; 28 cm.
Water and air quality trends and summaries were determined for the six states in Region VIII. These states are Colorado, Montana, North Dakota, South Dakota, Utah, and Wyoming. Only the data on EPA's national data banks were used. The STORET data bank was used for the water quality analysis and the SAROAD base was used for the air analysis. The water quality status and trends were calculated and reported in two ways; (1) as single parameter percentages of standard or criteria violations, and (2) as a single 'index' number derived as the aggregate of percentage violations of four parameter groups. The air quality report provides information where quality standards are achieved as well as areas which still have significant problems. Indices are used where appropriate. This report was not intended to be a comprehensive analysis of cause and effect relationships.