| Main Title |
Guidelines for the Evaluation of Air Quality Trends. |
| CORP Author |
Environmental Protection Agency, Research Triangle Park, NC. Office of Air Quality Planning and Standards. |
| Year Published |
1974 |
| Report Number |
OAQPS-1.2-014; |
| Stock Number |
PB80-223712 |
| Additional Subjects |
Air pollution ;
Trends ;
Statistical analysis ;
Guidelines
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB80-223712 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
33p |
| Abstract |
The purpose of this guideline is to outline procedures that can be employed by the air pollution data analyst to evaluate trends in air quality. Trends will be generally considered as the broad long-term movement in the overall time sequence of historical air quality measurements. It will be examined in two ways. First will be in the form of a trend line or curve over time. Second will be a statistical categorization of the general direction of the movement over time, i.e., upward, downward, or no change. Associated with the second approach can be estimates of the rate of change of deterioration of improvement in the air quality. Most trend analysis can be performed upon aggregate measures of air quality estimates such as averages. |
| NTIS Title Notes |
Guideline series rept. |
| PUB Date Free Form |
Feb 74 |
| Category Codes |
13B; 68A; 91A; 48F |
| NTIS Prices |
PC A03/MF A01 |
| Primary Description |
200/04 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
323784995 |
| Origin |
NTIS |
| Type |
CAT |
