Table 1.
Pollutant levels measured at 942 locations across 12 study communities.
| Community | Number of locations | Pollutanta |
|||||
|---|---|---|---|---|---|---|---|
| NO2 |
NO |
NOx |
|||||
| Mean | CV (%) | Mean | CV (%) | Mean | CV (%) | ||
| Within LA basin | |||||||
| Mira Loma (MRL) | 80 | 18.5 | 13.2 | 9.7 | 24.2 | 28.2 | 14.3 |
| Riverside (RIV) | 100 | 20.6 | 18.6 | 16.0 | 59.7 | 36.4 | 34.7 |
| Upland (UPL) | 103 | 25.5 | 25.6 | 18.6 | 57.8 | 44.2 | 37.6 |
| Glendora (GLE) | 100 | 25.8 | 14.1 | 20.5 | 41.6 | 46.3 | 24.6 |
| San Bernardino (SBE) | 66 | 25.8 | 14.7 | 15.6 | 35.0 | 41.2 | 21.1 |
| Long Beach (LGB) | 71 | 25.9 | 9.6 | 46.9 | 15.8 | 72.4 | 12.7 |
| Anaheim (ANA) | 61 | 29.8 | 8.4 | 49.3 | 18.4 | 79.1 | 14.0 |
| San Dimas (SDM) | 77 | 30.4 | 7.5 | 31.8 | 22.5 | 62.3 | 14.2 |
| Mean | 25.3 | 21.3 | 26.0 | 62.3 | 51.3 | 39.0 | |
| Outside LA basin | |||||||
| Santa Maria (SMA) | 67 | 5.0 | 18.8 | 4.5 | 30.2 | 9.6 | 22.1 |
| Alpine (ALP) | 72 | 10.9 | 38.7 | 4.8 | 99.6 | 15.7 | 56.3 |
| Lake Elsinore (LKE) | 72 | 10.9 | 19.2 | 7.3 | 38.0 | 18.2 | 25.9 |
| Santa Barbara (SBA) | 73 | 11.1 | 29.2 | 14.9 | 59.1 | 26.3 | 45.4 |
| Mean | 9.5 | 39.8 | 7.9 | 84.0 | 17.5 | 55.3 | |
a
Mean and coefficient of variation (CV) across sampling locations within each study community of the 4-week average concentrations of each pollutant (p.p.b.).