Thursday, Friday, Saturday Recap

Ozone levels skyrocketed to unhealthy levels across the Denver metro area last Thursday, Friday, and Saturday. Based on the state's data, there were 34 violations of the 8-hour ozone ambient air quality standard in this three day period. The 8-hour ozone standard is 80 parts per billion (ppb). Here's a list of the 8-hour ozone violations that occurred Thursday, Friday, and Saturday:

Thursday, July 13

Chatfield Reservoir Monitor

HOUR (MST)	8-hour O3 average (ppb)
5 P.M.	86
6 P.M.	91
7 P.M.	92
8 P.M.	90
9 P.M.	86

Greeley Tower Monitor

HOUR (MST)	8-hour O3 average (ppb)
6 P.M.	88
7 P.M.	90
8 P.M.	86

Highlands Monitor

HOUR (MST)	8-hour O3 average (ppb)
8 P.M.	85

Welch Monitor

HOUR (MST)	8-hour O3 average (ppb)
6 P.M.	87

Friday, July 14:

Fort Collins West Monitor

HOUR (MST)	8-hour O3 average (ppb)
4 P.M.	85
5 P.M.	90
6 P.M.	94
7 P.M.	96
8 P.M.	97
9 P.M.	95
10 P.M.	92
11 P.M.	88

Rocky Flats North Monitor

HOUR (MST)	8-hour O3 average (ppb)
4 P.M.	87
5 P.M.	89
6 P.M.	91
7 P.M.	90
8 P.M.	88
9 P.M.	85

South Boulder Creek Monitor

HOUR (MST)	8-hour O3 average (ppb)
6 P.M.	86
7 P.M.	86

Saturday, July 15:

Fort Collins West Monitor

HOUR (MST)	8-hour O3 average (ppb)
4 P.M.	86
5 P.M.	87
6 P.M.	86

Rocky Flats North Monitor

HOUR (MST)	8-hour O3 average (ppb)
5 P.M.	89
6 P.M.	90
7 P.M.	87

South Boulder Creek Monitor

HOUR (MST)	8-hour O3 average (ppb)
5 P.M.	85
6 P.M.	86