Indicator Gauge Icon Legend
Legend Colors
Red is bad, green is good, blue is not statistically different/neutral.
Compared to Distribution
the value is in the best half of communities.
the value is in the 2nd worst quarter of communities.
the value is in the worst quarter of communities.
Compared to Target
meets target; 
does not meet target.
Compared to a Single Value
lower than the comparison value;
higher than the comparison value;
not statistically different from comparison value.
Trend
non-significant change over time; 
significant change over time; 
no change over time.
Compared to Prior Value
higher than the previous measurement period;
lower than the previous measurement period;
no statistically different change from previous measurement period.
Significantly better than the overall value
Significantly worse than the overall value
No significant difference with the overall value
No data on significance available
Percent of Bad Air Quality Days
State: California
Measurement Period: 2021
This indicator is archived and is no longer being updated. Click to learn more
Percent of Bad Air Quality Days is how many of the days measured had an Air Quality Index of 101 or higher, indicating the air is unhealthy to breathe.
Air Quality Index Health Levels & Bounds
| Health Level | Lower Bound | Upper Bound |
| Very Healthy | 0 | 50 |
| Healthy | 51 | 100 |
| Fair (unhealthy for sensitive groups) | 101 | 150 |
| Unhealthy | 151 | 200 |
| Very Unhealthy | 201 | 300 |
| Hazardous | 301 | 500 |
State: California
0.1%
Percent of Days
Source:
US Environmental Protection Agency (EPA), Air Quality Index (AQI) Report
Measurement period: 2021
Maintained by: County of Monterey
Last update: April 2022
Measurement period: 2021
Maintained by: County of Monterey
Last update: April 2022
Compared to
Graph Selections
Data Source
- US Environmental Protection Agency (EPA), Air Quality Index (AQI) Report
Maintained By: County of Monterey
Filed under: Environmental Health / Air, Environmental Health / Toxins & Contaminants, Environmental Health / Wildlife, Physical Determinants of Health