New Ozone Nowcast to be Implemented on Thursday, August 1

EPA has updated the NowCast for ozone – the technical method used to show current ozone values on AirNow.gov and will be updating the code on AirNow.gov during the evening of 8/1/19. Using this improved method, current ozone conditions will more closely represent the 8-hour average value for ozone air quality and should be more consistent with the daily AQI value.

For a technical paper describing this change and more information about the R code and example files, please visit https://github.com/USEPA/O3-Nowcast

Posted July 25, 2019, 09:51 (PT)

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Color Legend
Green Current Yellow 2 to 6 hrs old
Red over 6 hrs old Gray Unknown status

August 18, 2019 06:42 (ET) (All times are in ET)
Agency Ozone PM2.5 PM10
AB1 08/18 05:00 08/18 05:00 02/25 09:00
AF1   08/18 10:00  
AIR      
AKC      
AL1 08/18 05:00 08/18 05:00 03/01 09:00
AL2 08/18 05:00 08/18 05:00 08/18 05:00
AL3      
AL4 08/18 05:00 08/18 05:00  
ALG   08/18 04:00  
AR1 08/18 05:00 08/18 05:00  
AZ2 08/18 05:00 08/18 05:00 08/18 05:00
AZ3 08/18 05:00 08/18 05:00 08/18 05:00
AZ4 08/18 05:00 08/18 05:00 08/18 05:00
BAA   08/18 04:00  
BC1 08/18 05:00 08/18 05:00 08/18 05:00
BC2 08/18 05:00 08/18 05:00 08/18 05:00
BI1   08/18 05:00  
BIH   08/18 06:00  
BK1      
BLW 08/18 05:00 04/01 01:00  
BPT 08/18 05:00 08/18 04:00 04/14 18:00
CA0 08/18 05:00 08/18 05:00 08/18 05:00
CA1 08/18 05:00 08/18 05:00 08/27 03:00
CA2 08/18 03:00 08/18 03:00  
CA3 08/18 05:00 08/18 05:00 08/18 05:00
CA4 08/18 05:00 08/18 05:00  
CA5 08/18 05:00 08/18 05:00 08/18 05:00
CA6 08/18 05:00 08/18 05:00 08/18 05:00
CA7 08/18 05:00 08/18 05:00 08/18 05:00
CA8 08/18 05:00 08/18 05:00 08/18 05:00
CA9 08/18 05:00 08/18 05:00 08/18 05:00
CAT 08/18 05:00 08/18 05:00  
CHO 08/18 05:00    
CI1      
CK1 08/18 05:00 08/18 05:00 08/18 05:00
CMB   08/18 06:00  
CN1 08/18 05:00 08/18 05:00  
CN3 08/18 04:00 08/18 04:00 08/18 04:00
CN4 08/18 05:00 08/18 05:00  
CO1 08/18 05:00 08/18 05:00 08/18 05:00
CO4      
CRI   08/17 23:00  
CT1 08/18 05:00 08/18 05:00 08/18 05:00
CUR 06/24 16:00 06/24 16:00  
DC1 08/18 05:00 08/18 06:37 08/18 05:00
DE1 08/18 05:00 08/18 05:00  
DN1      
DRN   08/18 05:00  
DUS   08/18 05:00  
EP1      
EPA   08/21 12:00  
FL1 08/18 05:00 08/18 05:00 08/18 05:00
FL2 08/18 05:00 08/18 05:00 09/29 15:00
FL3 08/18 05:00 08/18 05:00 08/18 05:00
FL4 08/18 05:00 08/18 05:00 08/18 05:00
FS1 08/18 05:00 08/18 06:00 08/05 04:00
GAB      
GBU 08/18 05:00 08/18 05:00 08/18 05:00
GN1   08/07 06:00  
GOL      
GT1   06/28 11:36  
HC1   08/18 05:00  
HI1 08/18 05:00 08/18 05:00 08/18 05:00
IA1 08/18 05:00 08/18 05:00 08/18 05:00
IA2 08/18 05:00 08/18 05:00  
IA3 08/18 05:00 08/18 05:00  
ID1 08/18 05:00 08/18 06:00 08/18 05:00
IL1 08/18 05:00 08/18 05:00  
IN4 08/18 05:00 08/18 05:00 08/18 05:00
JDA   05/18 01:11  
JOR   07/10 07:00  
JP1 12/30 02:00 12/30 02:00 12/30 02:00
KAZ   08/18 04:00  
KM1 08/18 06:00 08/18 06:00  
KS1 08/18 05:00 08/18 05:00 08/18 05:00
KY2 08/18 05:00 08/18 05:00 08/18 05:00
LA1 08/18 05:00 08/18 05:00 02/01 00:00
LAO   08/18 05:00  
LC1      
MA1 08/18 05:00 08/18 05:00  
MAD   06/11 12:00  
MD1 08/18 05:00 08/18 05:00  
ME1 08/18 05:00 08/18 05:00 08/18 05:00
MEN 08/18 05:00 08/18 05:00 08/17 19:00
ML1   07/19 08:00  
MM1 08/18 05:00 08/18 05:00  
MMR 08/18 06:00 08/18 06:00  
MO1 08/18 05:00 08/18 05:00 08/18 05:00
MOE      
MON 08/18 04:00 08/18 04:00 08/18 04:00
MS1 08/18 05:00 08/18 05:00  
MT1 08/18 05:00 08/18 05:00 08/18 05:00
NC2 08/18 05:00 08/18 05:00  
NCA 08/18 04:00 08/18 05:00 08/18 05:00
NE1      
NE2 08/18 05:00 08/18 05:00 08/18 05:00
NEA      
NH1 08/18 05:00 08/18 05:00 08/18 05:00
NJ1 08/18 05:00 08/18 05:00  
NL1 08/18 05:00 08/18 05:00  
NM2 08/18 05:00 08/18 05:00 08/18 05:00
NOS 08/18 04:00 08/18 05:00  
NPS 08/18 05:00 08/18 05:00  
NRB   08/18 05:51 08/18 05:51
NV2 08/18 05:00 08/18 05:00 08/18 05:00
NV3 08/18 05:00 08/18 05:00 08/18 05:00
OAP 08/18 06:00    
OAQ 08/18 04:00 08/18 05:00 08/18 05:00
OAR      
OD1   06/06 12:00  
OH1 08/18 05:00 08/18 05:00 08/18 05:00
OK1 08/18 05:00 08/18 05:00 08/18 05:00
OR1 08/18 05:00 08/18 05:00  
OR2 08/18 05:00 08/18 05:00  
PA1 08/18 05:00 08/18 05:00 06/30 23:00
PA3 08/18 05:00 08/18 05:00  
PIN      
PK1   08/18 05:00  
PK2   08/18 05:00  
PK3   08/18 05:00  
PK4   08/18 05:00  
RI1 08/18 05:00 08/18 05:00  
RIY   07/08 06:00  
SC1 08/18 05:00 08/18 05:00 08/18 05:00
SD1 08/18 05:00 08/18 05:00 08/18 05:00
SFN 03/05 07:00    
SHA 08/18 05:00 08/18 05:00  
SIC      
SIS 08/18 05:00 08/18 05:00  
SK1 08/18 05:00 08/18 05:00 08/21 16:00
SLO 08/18 05:00 08/18 05:00 08/18 05:00
SMJ 08/07 09:00   08/07 09:00
SR1 08/18 05:00   08/18 05:00
SU1   07/30 08:00  
SY1   08/14 13:00  
THM 07/08 16:00 08/18 06:00  
TKM      
TN1 08/18 05:00 08/18 05:00  
TN2 08/18 05:00 08/18 04:00 01/01 00:00
TN3 08/18 05:00 08/18 05:00 11/01 00:00
TN4 08/18 05:00 08/18 05:00  
TPCD 08/18 05:00 08/18 05:00 08/18 05:00
TRX 08/18 05:00 08/18 05:00 08/18 05:00
TX1 08/18 05:00 08/18 05:00 08/18 05:00
UDA      
UNR      
UT1 08/18 05:00 08/18 05:00 08/18 05:00
UTE 08/18 05:00 06/01 01:00  
UZB 08/18 05:00 08/18 05:00  
VA1 08/18 05:00 08/18 05:00  
VG1   01/23 19:24  
VT1 08/18 05:00 08/18 05:00 08/18 05:00
WI1 08/18 05:00 08/18 05:00 08/18 05:00
WT1 08/18 05:00    
WV1      
WV2 08/18 05:00 06/04 13:00