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ALL READINGS ARE IN ppb (Parts Per Billion)
Bristol O3
| Date |
Hour (EST) |
1 Hour O3 Value |
8 Hour O3 Value |
| 7/25/2008 |
23 |
31 |
48 |
| 7/25/2008 |
22 |
34 |
51 |
| 7/25/2008 |
21 |
40 |
54 |
| 7/25/2008 |
20 |
48 |
55 |
| 7/25/2008 |
19 |
55 |
55 |
| 7/25/2008 |
18 |
59 |
54 |
| 7/25/2008 |
17 |
58 |
52 |
| 7/25/2008 |
16 |
58 |
49 |
| 7/25/2008 |
15 |
56 |
44 |
| 7/25/2008 |
14 |
55 |
39 |
| 7/25/2008 |
13 |
53 |
33 |
| 7/25/2008 |
12 |
49 |
27 |
| 7/25/2008 |
11 |
46 |
22 |
| 7/25/2008 |
10 |
38 |
19 |
| 7/25/2008 |
9 |
33 |
16 |
| 7/25/2008 |
8 |
24 |
15 |
| 7/25/2008 |
7 |
15 |
15 |
| 7/25/2008 |
6 |
7 |
15 |
| 7/25/2008 |
5 |
3 |
16 |
| 7/25/2008 |
4 |
11 |
18 |
| 7/25/2008 |
3 |
17 |
20 |
| 7/25/2008 |
2 |
19 |
23 |
| 7/25/2008 |
1 |
24 |
26 |
| 7/25/2008 |
0 |
23 |
28 |
AQI Category |
8 Hour O3 Breakpoint |
1 Hour O3 Breakpoint |
Levels of Health Concern |
Cautionary
Statements |
| 0 to 50 |
0 to 64 ppb |
- |
Good |
None |
| 51 to 100 |
65 - 84 ppb |
- |
Moderate |
Unusually sensitive people should consider
reducing prolonged or heavy exertion. |
| 101 to 150 |
85 - 104 ppb |
125 - 164
ppb |
Unhealthy
for Sensitive Groups |
People with heart or lung disease, older
adults, and children should reduce prolonged or heavy exertion. |
| 151 to 200 |
105 - 124
ppb |
165 - 204
ppb |
Unhealthy |
People with heart or lung disease, older
adults, and children should avoid prolonged or heavy exertion. Everyone
else should reduce prolonged or heavy exertion. |
| 201 to 300 |
125 - 374
ppb |
205 - 404
ppb |
Very
unhealthy |
People with heart or lung disease, older
adults, and children should avoid all physical activity outdoors. Everyone
else should avoid prolonged or heavy exertion. |
| 301 to 500 |
>375 ppb |
>405 ppb |
Hazardous |
People with heart or lung
disease, older adults, and children should remain indoors and keep
activity levels low. Everyone else should avoid all physical
activity outdoors. |
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