AirNow-Tech is a password-protected website for air quality data management analysis, and decision support. AirNow-Tech is primarily used by the federal, State, Tribal, and local air quality organizations that provide data and forecasts to the AirNow system, as well as researchers and other air data users. It allows users to:

  • Access monitoring site data, information, and polling status
  • Analyze current and past air quality events and episodes
  • Submit and analyze air quality forecasts
  • Configure EnviroFlash email services for public dissemination of air quality forecasts
  • View meteorological and air quality data
  • Generate data reports
  • Create GIS-based maps with air quality and meteorological conditions
  • Sign up for the AirNow Notifier listserve
Register for an AirNow-Tech Account

A comprehensive list of EPA air pollution data sources

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

May 23, 2017 11:40 (ET) (All times are in ET)
Agency Ozone PM2.5 PM10
AB1 05/23 10:00 05/23 10:00 02/25 09:00
AIR      
AK1 05/23 09:00 05/23 10:00 05/23 10:00
AL1 05/23 10:00 05/23 06:00 10/28 13:00
AL2 05/23 10:00 05/23 10:00 05/23 10:00
AL3      
AL4 05/23 10:00 05/23 10:00  
AR1 05/23 10:00 05/23 10:00  
AZ1 05/23 10:00 05/23 10:00 05/23 10:00
AZ2 05/23 10:00 05/23 10:00 05/23 10:00
AZ3 05/23 10:00 05/23 10:00 05/23 10:00
AZ4 05/23 10:00   05/23 10:00
BC1 05/23 10:00 05/23 10:00 05/23 10:00
BC2 05/23 10:00 05/23 10:00 05/23 10:00
BLW 05/23 10:00 10/01 01:00  
CA0 05/23 10:00 05/23 08:00 05/23 10:00
CA1 05/23 10:00 05/23 10:00 05/23 10:00
CA2 05/23 10:00 05/23 10:00  
CA3 05/23 10:00 05/23 10:00 05/23 10:00
CA4 05/23 10:00 05/23 10:00  
CA5 05/23 10:00 05/23 10:00 05/23 10:00
CA6 05/23 09:00 05/23 09:00 05/23 09:00
CA7 05/23 10:00 05/23 10:00 05/23 10:00
CA8 05/23 10:00 05/23 11:00 05/23 10:00
CA9 05/23 10:00 05/23 10:00 05/23 10:00
CHO 05/23 11:00    
CK1 05/23 10:00 05/23 09:00 05/22 13:00
CMB      
CN1 05/23 10:00 05/23 10:00  
CN2 05/23 10:00    
CN3 05/15 15:00 05/15 15:00 05/15 15:00
CN4 05/23 10:00 05/23 10:00  
CO1 05/23 10:00 05/23 10:00 05/23 10:00
CO4      
CT1 05/23 10:00 05/23 10:00 05/23 10:00
DC1 05/23 10:00 05/23 11:38 05/17 13:00
DE1 05/23 10:00 05/23 10:00  
DN1 05/23 10:00    
EP1      
EPA   08/21 12:00  
FL2 05/23 10:00 05/23 10:00  
FL3 05/23 10:00 05/23 10:00 05/23 10:00
FL4 05/23 10:00 05/23 10:00 05/23 10:00
FS1   05/23 11:00 08/04 20:00
GBU 05/23 10:00 05/23 10:00 05/23 10:00
GOL      
HI1 05/23 10:00 05/23 10:00 05/23 10:00
IA1 05/23 10:00 05/23 10:00 05/23 10:00
IA2 05/23 10:00 05/23 10:00  
IA3 05/23 10:00 05/23 10:00  
ID1 05/23 10:00 05/23 10:00 05/23 10:00
IEG 05/23 11:00 05/23 11:00 05/23 11:00
IL1 05/23 10:00 05/23 10:00  
IN4 05/23 10:00 05/23 10:00 05/23 10:00
JP1 12/30 02:00 12/30 02:00 12/30 02:00
KM1 05/23 11:00 05/23 11:00  
KS1 05/23 10:00 05/23 10:00 05/23 10:00
KY1 05/23 10:00 05/23 10:00  
LA1 05/23 10:00 05/23 10:00 05/23 10:00
LC1      
MA1 05/23 10:00 05/23 10:00  
MD1 05/23 10:00 05/23 10:00  
ME1 05/23 10:00 05/23 10:00 05/23 10:00
MEN 05/23 10:00 05/23 10:00 05/23 10:00
MI1 05/23 10:00 05/23 10:00 05/23 10:00
MM1 05/23 10:00 05/23 10:00  
MO1 05/23 10:00 05/23 10:00 05/23 10:00
MON 05/23 09:00 05/23 09:00 05/23 09:00
MS1 05/23 10:00 05/23 10:00  
MT1 05/23 10:00 05/23 10:00 05/23 10:00
MX1 10/27 03:00 05/23 10:00 03/31 10:00
NC1 05/23 10:00 05/23 10:00 05/23 10:00
NC3 05/23 10:00 05/23 10:00 11/30 23:00
NCA 05/23 10:00 05/23 09:00  
NE1 05/23 10:00 05/23 10:00 05/23 10:00
NE2 05/23 10:00 05/23 10:00 05/23 10:00
NH1 05/23 10:00 05/23 10:00 05/23 10:00
NJ1 05/23 10:00 05/23 10:00  
NL1 05/23 10:00 05/23 10:00  
NM1 05/23 10:00 05/23 10:00 05/23 10:00
NM2 05/23 10:00 05/23 10:00 05/23 10:00
NOS 05/23 10:00 05/23 10:00  
NPS 05/23 11:00 05/23 11:00  
NV1 05/23 10:00 05/23 10:00 05/23 10:00
NV2 05/23 10:00 05/23 10:00 05/23 10:00
NV3 05/23 10:00 05/23 10:00  
NY1 05/23 10:00 05/23 10:00 05/23 10:00
OAP 05/23 11:00    
OAQ 04/20 04:00 04/20 05:00 04/20 05:00
OAR      
OH1 05/23 10:00 05/23 10:00 05/23 10:00
OK1 05/23 10:00 05/23 10:00 05/23 10:00
OR1 05/23 09:00 05/23 09:00  
OR2 10/03 14:00 05/23 10:00  
PA1 05/23 10:00 05/23 10:00 12/31 18:00
PA3 05/23 10:00 05/23 10:00  
PIN 06/08 23:00    
PR1 05/23 10:00 05/23 10:00 05/23 10:00
QT1 12/01 08:00 05/23 10:00  
RI1 05/23 10:00 05/23 10:00  
SC1 05/23 10:00 05/23 10:00 05/23 10:00
SD1 05/23 07:00 05/23 09:00 05/23 07:00
SFN 03/05 07:00    
SHA 05/23 10:00 05/23 10:00  
SIC      
SK1 05/23 10:00 05/23 10:00 08/21 16:00
SLO 05/23 10:00 05/23 10:00 05/23 10:00
SMJ 05/23 09:00   05/23 09:00
SR1 05/23 10:00   05/23 10:00
THM 09/01 10:00 02/10 16:00  
TN1 05/23 10:00 05/23 10:00  
TN2 05/23 09:00 05/23 08:00  
TN3 05/23 10:00 05/23 10:00  
TN4 05/23 10:00 05/23 10:00  
TPCD 01/30 19:00   01/30 19:00
TRX 05/23 10:00 05/23 10:00 05/23 10:00
TX1 05/23 10:00 05/23 10:00 05/23 10:00
UDA      
UNR      
UT1 05/23 10:00 05/23 10:00 04/26 13:00
UTS 05/23 10:00 05/23 10:00  
VA1 05/23 10:00 05/23 10:00  
VG1   05/02 13:14  
VT1 05/23 10:00 05/23 10:00  
WI1 05/23 09:00 05/23 09:00 05/23 09:00
WT1 05/23 10:00    
WV1      
WV2 05/23 10:00 05/23 10:00