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

September 19, 2019 20:40 (ET) (All times are in ET)
Agency Ozone PM2.5 PM10
AB1 09/19 19:00 09/19 19:00 02/25 09:00
AF1   09/19 19:00  
AIR      
AKC      
AL1 09/19 19:00 09/19 19:00 03/01 09:00
AL2 09/19 19:00 09/19 19:00 09/19 19:00
AL3      
AL4 09/19 19:00 09/19 19:00  
ALG   09/19 18:00  
AR1 09/19 19:00 09/19 19:00  
AZ2 09/19 19:00 09/19 19:00 09/19 19:00
AZ3 09/19 19:00 09/19 19:00 09/19 19:00
AZ4 09/19 19:00 09/19 19:00 09/19 19:00
BAA   09/12 16:00  
BC1 09/19 19:00 09/19 19:00 09/19 19:00
BC2 09/19 19:00 09/19 19:00 09/19 19:00
BI1   09/19 19:00  
BIH   09/19 18:00  
BK1      
BLW 09/19 19:00 04/01 01:00  
BPT 09/11 14:00 09/19 17:00 04/14 18:00
CA1 09/19 19:00 09/19 19:00 08/27 03:00
CA2 09/19 19:00 09/19 19:00  
CA3 09/19 11:00 09/19 11:00 09/19 11:00
CA4 09/19 19:00 09/19 19:00  
CA5 09/19 19:00 09/19 19:00 09/19 19:00
CA6 09/19 18:00 09/19 18:00 09/19 18:00
CA7 09/19 19:00 09/19 19:00 09/19 19:00
CA8 09/19 19:00 09/19 20:00 09/19 19:00
CA9 09/19 19:00 09/19 19:00 09/19 19:00
CAT 09/19 19:00 09/19 19:00  
CHO 09/19 19:00    
CI1      
CMB   09/19 19:00  
CN1 09/19 19:00 09/19 19:00  
CN3 09/19 19:00 09/19 19:00 09/19 19:00
CN4 09/19 19:00 09/19 19:00  
CO1 09/19 19:00 09/19 19:00 09/19 19:00
CO4      
CRI   09/19 13:00  
CT1 09/19 19:00 09/19 19:00 09/19 19:00
CUR 06/24 16:00 06/24 16:00  
DC1 09/19 19:00 09/19 20:38 09/19 19:00
DE1 09/19 19:00 09/19 19:00  
DN1      
DRN   09/19 19:00  
DUS   09/19 19:00  
EP1      
EPA   08/21 12:00  
FL1 09/19 19:00 09/19 19:00 09/19 19:00
FL2 09/19 19:00 09/19 19:00 09/29 15:00
FL3 09/19 19:00 09/19 19:00 09/19 19:00
FL4 09/19 19:00 09/19 19:00 09/19 19:00
FS1 09/19 19:00 09/19 20:00 08/05 04:00
GAB      
GBU 09/19 19:00 09/19 19:00 09/19 19:00
GN1   08/07 06:00  
GOL      
GT1   09/19 19:00  
HC1   09/19 19:00  
HI1 09/19 19:00 09/19 19:00 09/19 19:00
IA1 09/19 19:00 09/19 19:00 09/19 19:00
IA2 09/19 19:00 09/19 19:00  
IA3 09/19 19:00 09/19 19:00  
ID1 09/19 18:00 09/19 19:00 09/19 18:00
IL1 09/19 19:00 09/19 19:00  
IN4 09/19 19:00 09/19 19:00 09/19 19:00
JDA   05/18 01:11  
JOR   09/19 19:00  
JP1 12/30 02:00 12/30 02:00 12/30 02:00
KAZ   09/19 18:00  
KM1 09/19 20:00 09/19 20:00  
KS1 09/19 19:00 09/19 19:00 09/19 19:00
KY2 09/19 19:00 09/19 19:00 09/19 19:00
LA1 09/19 19:00 09/19 19:00 02/01 00:00
LAO   09/19 19:00  
LC1      
MA1 09/19 19:00 09/19 19:00  
MAD   06/11 12:00  
MD1 09/19 19:00 09/19 19:00  
ME1 09/19 19:00 09/19 19:00 09/19 19:00
MEN 09/19 19:00 09/19 19:00 09/19 19:00
ML1   07/19 08:00  
MM1 09/19 19:00 09/19 19:00  
MMR 09/19 19:00 09/19 19:00  
MO1 09/19 19:00 09/19 19:00 09/19 19:00
MOE      
MON 09/19 18:00 09/19 18:00 09/19 18:00
MS1 09/19 19:00 09/19 19:00  
MT1 09/19 19:00 09/19 19:00 09/19 19:00
NC2 09/19 19:00 09/19 19:00  
NCA 09/19 19:00 09/19 19:00 09/19 19:00
NE1      
NE2 09/19 00:00 09/19 00:00 09/19 00:00
NEA      
NH1 09/19 19:00 09/19 19:00 09/19 19:00
NJ1 09/19 19:00 09/19 19:00  
NL1 09/19 19:00 09/19 19:00  
NM2 09/19 19:00 09/19 19:00 09/19 19:00
NOS 09/19 18:00 09/19 19:00  
NPS 09/19 19:00 09/19 20:00  
NRB   09/19 19:13 09/19 19:13
NV2 09/19 19:00 09/19 19:00 09/19 19:00
NV3 09/19 19:00 09/19 19:00 09/19 19:00
OAP 09/19 20:00    
OAQ 09/19 19:00 09/19 19:00 09/19 19:00
OAR      
OD1   06/06 12:00  
OH1 09/19 19:00 09/19 19:00 09/19 19:00
OK1 09/19 19:00 09/19 19:00 09/19 19:00
OR1 09/19 19:00 09/19 19:00  
OR2 09/19 19:00 09/19 19:00  
PA1 09/19 19:00 09/19 19:00 06/30 23:00
PA3 09/19 19:00 09/19 19:00  
PIN      
PK1   09/19 19:00  
PK2   09/19 19:00  
PK3   09/19 19:00  
PK4   09/19 19:00  
RI1 09/19 19:00 09/19 19:00  
RIY   07/08 06:00  
SC1 09/19 19:00 09/19 19:00 09/19 19:00
SD1 09/19 19:00 09/19 19:00 09/19 19:00
SFN 03/05 07:00    
SHA 09/19 19:00    
SIC      
SIS 09/19 20:00 09/19 19:00  
SK1 09/19 19:00 09/19 19:00 08/21 16:00
SLO 09/19 19:00 09/19 19:00 09/19 19:00
SMJ 08/07 09:00   08/07 09:00
SR1 09/19 19:00   09/19 19:00
SU1   07/30 08:00  
SY1   09/19 19:00  
THM 09/19 19:00 09/19 20:00  
TKM      
TN1 09/19 19:00 09/19 19:00  
TN2 09/19 19:00 09/19 18:00 01/01 00:00
TN3 09/19 19:00 09/19 19:00 11/01 00:00
TPCD 09/19 19:00 09/19 19:00 09/19 19:00
TRX 09/19 19:00 09/19 19:00 09/19 19:00
TX1 09/19 19:00 09/19 19:00 09/19 19:00
UDA      
UNR      
UT1 09/19 19:00 09/19 19:00 09/19 19:00
UTE 09/19 19:00 06/01 01:00  
UZB 09/19 19:00 09/19 19:00  
VA1 09/19 19:00 09/19 19:00  
VG1   01/23 19:24  
VT1 09/19 19:00 09/19 19:00 09/19 19:00
WI1 09/19 19:00 09/19 19:00 09/19 19:00
WT1 09/19 19:00    
WV1      
WV2 09/19 19:00 09/19 04:00