

Metropolitan cities' scorecard for ozone (four-hour) NEPM standard, based on analysis of air quality index values 1999-2014
Metropolitan cities' scorecard for ozone (four-hour) NEPM standard, based on analysis of air quality index values 1999-2014
This assessment summary component has changed from 2011.
- This assessment summary was previously assessed for the years 1999-2008
The original 2011 summary, grade, trend and confidence levels have been replicated here to assist comparison of changes between reporting cycles.
Average percentage frequency distribution: very good 49; good 50; fair 1; poor 0; very poor 0
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Average percentage frequency distribution: very good 46; good 53; fair 1; poor 0; very poor 0
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Average percentage frequency distribution: very good 31; good 65; fair 4; poor <1; very poor 0
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Average percentage frequency distribution: very good 31; good 64; fair 55; poor 0; very poor 0
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Average percentage frequency distribution: Very good 38; good 61; fair 1; poor 0; very poor 0
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Average percentage frequency distribution: very good 43; good 55; fair 2; poor 0; very poor 0
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Average percentage frequency distribution: very good 94; good 6; fair 0; poor 0; very poor 0
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Average percentage frequency distribution: very good 34; good 63; fair 3; poor 0; very poor 0
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Average percentage frequency distribution: very good 67; good 32; fair <1; poor <1; very poor 0
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Average percentage frequency distribution: very good 16; good 79; fair 4; poor 0; very poor 0
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Average percentage frequency distribution: very good 63; good 37; fair 0; poor 0; very poor 0
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Average percentage frequency distribution: very good 17; good 72; fair 9; poor 2; very poor 0
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Assessment Summary Key
Grades
Very good
Air quality is considered very good, and air pollution poses little or no risk
Good
Air quality is considered good, and air pollution poses little or no risk
Fair
Air quality is acceptable. However, there may be a health concerns for very sensitive people
Poor
Air quality is unhealthy for sensitive groups. The general population is not likely to be affected in this range
Very poor
Air quality is unhealthy, and everyone may begin to experience health effects. People from sensitive groups
may experience more serious health effects
Recent Trends
-
Improving
-
Stable
-
Deteriorating
-
Unclear
Confidence
-
Adequate: Adequate high-quality evidence and high level of consensus
-
Somewhat adequate: Adequate high-quality evidence or high level of consensus
-
Limited: Limited evidence or limited consensus
-
Very limited: Limited evidence and limited consensus
-
Low: Evidence and consensus too low to make an assessment
Comparability
-
Comparable: Grade and trend are comparable to the previous assessment
-
Somewhat comparable: Grade and trend are somewhat comparable to the previous assessment
-
Not comparable: Grade and trend are not comparable to the previous assessment
-
Not previously assessed
Comments
Nil.