Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Pearson's correlation coefficients between pollutants for the historical (2017–2019) and current (2020) periods.
| Pollutant | PM10 | PM25 | NOx | CO | O3 |
|---|---|---|---|---|---|
| A: 2017–2019 | |||||
| PM10 | 1.00 | 0.72 | 0.71 | 0.64 | −0.08 |
| PM25 | 1.00 | 0.82 | 0.83 | −0.39 | |
| NOx | 1.00 | 0.93 | −0.59 | ||
| CO | 1.00 | −0.60 | |||
| O3 | 1.00 | ||||
| B: 2020 | |||||
| PM10 | 1.00 | 0.63 | 0.61 | 0.56 | 0.14 |
| PM25 | 1.00 | 0.57 | 0.72 | −0.23 | |
| NOx | 1.00 | 0.82 | −0.42 | ||
| CO | 1.00 | −0.45 | |||
| O3 | 1.00 | ||||
