Table 1.
Frequency and number of times information sources contained DQOs/MQOsa for different performance attributes (Williams et al., 2018).
| Performance Characteristic/DQIb | PM2.5 | PM10 | Carbon Monoxide (CO) | Nitrogen Dioxide (NO2) | Sulfur Dioxide (SO2) | Ozone (O3) |
|---|---|---|---|---|---|---|
| Accuracy/Uncertainty | 84% (16) | 77% (10) | 65% (11) | 68% (15) | 80% (4) | 76% (19) |
| Bias | 5% (1) | 8% (1) | 18% (3) | 9% (2) | 40% (2) | 16% (4) |
| Completeness | 26% (5) | 31% (4) | 12% (2) | 14% (3) | 40% (2) | 16% (4) |
| Detection Limit | 26% (5) | 8% (1) | 47% (8) | 32% (7) | 80% (4) | 24% (6) |
| Measurement Duration | 26% (5) | 8% (1) | 18% (3) | 14% (3) | 0% (0) | 20% (5) |
| Measurement Frequency | 26% (5) | 15% (2) | 35% (6) | 23% (5) | 0% (0) | 32% (8) |
| Measurement Range | 47% (9) | 46% (6) | 35% (6) | 32% (7) | 80% (4) | 40% (10) |
| Precision | 42% (8) | 31% (4) | 29% (5) | 36% (8) | 80% (4) | 32% (8) |
| Response Time | 0% (0) | 0% (0) | 29% (5) | 32% (7) | 80% (4) | 20% (5) |
| Selectivity | 11% (2) | 8% (1) | 24% (4) | 23% (5) | 80% (4) | 16% (4) |
| Otherc | 5% (1) | 8% (1) | 0% (0) | 0% (0) | 0% (0) | 8% (2) |
| All Information Sources | 40% (19) | 27% (13) | 35% (17) | 46% (22) | 10% (5) | 52% (25) |
a
MQO =Measurement Quality Objective.
b
Totals across all performance characteristics for a given pollutant are always greater than the figures shown in the last row because a single information source may contain performance requirements for more than one pollutant and/or performance characteristic.
c
“Other” category captures all performance characteristics not among the 10 listed.