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

October 18, 2017 00:18 (ET) (All times are in ET)
Agency Ozone PM2.5 PM10
AB1 10/17 22:00 10/17 22:00 02/25 09:00
AIR      
AK1 10/17 23:00 10/17 23:00 10/17 23:00
AL1 10/17 22:00 10/17 22:00 10/28 13:00
AL2 10/17 23:00 10/17 23:00 10/17 23:00
AL3      
AL4 10/17 22:00 10/17 22:00  
AR1 10/17 22:00 10/17 22:00  
AZ1 10/17 22:00 10/17 23:00 10/17 23:00
AZ2 10/17 23:00 10/17 23:00 10/17 23:00
AZ3 10/17 23:00 10/17 23:00 10/17 23:00
AZ4 10/17 23:00 07/10 15:42 10/17 23:00
BC1 10/17 22:00 10/17 22:00 10/17 22:00
BC2 10/17 23:00 10/17 23:00 10/17 23:00
BLW 10/17 23:00 03/17 13:00  
CA0 10/17 23:00 10/04 11:00 10/17 23:00
CA1 10/17 23:00 10/17 23:00 08/27 03:00
CA3 10/17 23:00 10/17 23:00 10/17 23:00
CA4 10/17 23:00 10/17 23:00  
CA5 10/17 23:00 10/17 23:00 10/17 23:00
CA6 10/17 22:00 10/17 22:00 10/17 22:00
CA7 10/17 23:00 10/17 23:00 10/17 23:00
CA8 10/17 23:00 10/18 00:00 10/17 23:00
CA9 10/17 23:00 10/17 23:00 10/17 23:00
CAT 10/17 23:00 06/06 14:00  
CHO 10/17 23:00    
CK1 10/17 23:00 10/17 23:00 10/17 23:00
CMB   10/17 23:00  
CN1 10/17 22:00 10/17 22:00  
CN2 10/17 23:00    
CN3 10/17 23:00 10/17 23:00 10/17 23:00
CN4 10/17 22:00 10/17 22:00  
CO1 10/17 23:00 10/17 23:00 10/17 23:00
CO4      
CT1 10/17 23:00 10/17 23:00 10/17 23:00
DC1 10/17 23:00 10/18 00:17 10/17 23:00
DE1 10/17 23:00 10/17 23:00  
DN1      
EP1      
EPA   08/21 12:00  
FL2 10/17 23:00 10/17 23:00  
FL3 10/17 22:00 10/17 22:00 10/17 22:00
FL4 10/17 23:00 10/17 23:00 10/17 23:00
FS1   10/18 00:00 08/05 04:00
GBU 10/17 23:00 10/18 00:00 10/17 23:00
GOL      
HC1   10/17 22:00  
HI1 10/17 22:00 10/17 22:00 10/17 22:00
IA1 10/17 23:00 10/17 23:00 10/17 23:00
IA2 10/17 23:00 10/17 23:00  
IA3 10/16 18:00 10/16 18:00  
ID1 10/17 22:00 10/17 23:00 10/17 23:00
IEG 10/17 23:00 10/17 23:00 10/17 23:00
IL1 10/17 23:00 10/17 23:00  
IN4 10/17 23:00 10/17 23:00 10/17 23:00
JP1 12/30 02:00 12/30 02:00 12/30 02:00
KM1 10/17 23:00 10/17 23:00  
KS1 10/17 23:00 10/17 23:00 10/17 23:00
KY1 10/17 22:00 10/17 22:00  
LA1 10/17 23:00 10/17 23:00 10/17 23:00
LC1      
MA1 10/17 22:00 10/17 22:00  
MD1 10/17 23:00 10/17 23:00  
ME1 10/17 22:00 10/17 22:00 10/17 22:00
MEN 10/17 23:00 10/17 23:00 10/17 23:00
MI1 10/17 23:00 10/17 23:00 10/17 23:00
MM1 10/17 23:00 10/17 23:00  
MO1 10/17 23:00 10/17 23:00 10/17 23:00
MOE      
MON 10/17 22:00 10/17 22:00 10/17 22:00
MS1 10/17 23:00 10/17 23:00  
MT1 10/17 23:00 10/17 23:00 10/17 23:00
NC1 10/17 23:00 10/17 23:00 10/17 23:00
NC2 10/17 23:00 10/17 23:00  
NC3 10/17 23:00 10/17 23:00 06/30 23:00
NCA 10/17 23:00 10/17 23:00 09/28 13:00
NE1 10/17 23:00 10/17 23:00 10/17 23:00
NE2 10/17 23:00 10/17 23:00 10/17 23:00
NH1 10/17 23:00 10/17 23:00 10/17 23:00
NJ1 10/17 23:00 10/17 23:00  
NL1 10/17 22:00 10/17 22:00  
NM1 10/17 23:00 10/17 23:00 10/17 23:00
NM2 10/17 23:00 10/17 23:00 10/17 23:00
NOS 10/17 22:00 10/17 22:00  
NPS 10/18 00:00 10/18 00:00  
NRB   10/17 23:55 10/17 23:55
NV2 10/17 23:00 10/17 23:00 10/17 23:00
NV3 10/17 23:00 10/17 23:00 10/17 23:00
NY1 10/17 22:00 10/17 22:00 10/17 22:00
OAP 10/17 23:00    
OAQ 10/17 23:00 10/17 23:00 10/17 23:00
OAR      
OH1 10/17 23:00 10/17 23:00 10/17 23:00
OK1 10/17 23:00 10/17 23:00 10/17 23:00
OR1 10/17 23:00 10/17 23:00  
OR2 10/02 09:00 10/17 23:00  
PA1 10/17 23:00 10/17 23:00 12/31 18:00
PA3 10/17 23:00 10/17 23:00  
PIN 06/08 23:00    
PR1 10/04 06:00 10/04 06:00 09/18 08:00
QT1 10/17 23:00 10/17 23:00  
RI1 10/17 23:00 10/17 23:00  
SC1 10/17 22:00 10/17 22:00 10/17 22:00
SD1 10/17 23:00 10/17 23:00 10/17 23:00
SFN 03/05 07:00    
SHA 10/17 23:00 10/17 23:00  
SIC      
SK1 10/17 23:00 10/17 23:00 08/21 16:00
SLO 10/17 23:00 10/17 23:00 10/17 23:00
SMJ 08/07 09:00   08/07 09:00
SR1 10/17 23:00   10/17 23:00
THM 10/17 23:00 10/17 23:00  
TN1 10/17 22:00 10/17 22:00  
TN2 10/17 23:00 10/17 22:00  
TN3 10/17 22:00 10/17 22:00  
TN4 10/17 22:00 10/17 22:00  
TPCD 01/30 19:00   01/30 19:00
TRX 10/17 23:00 10/17 23:00 10/17 23:00
TX1 10/17 23:00 10/17 23:00 10/17 23:00
UDA      
UNR      
UT1 10/17 23:00 10/17 23:00 04/26 13:00
UTE 10/17 23:00 06/01 01:00  
UTS 10/17 23:00    
VA1 10/17 23:00 10/17 23:00  
VG1   09/08 11:13  
VT1 10/17 23:00 10/17 23:00  
WI1 10/17 23:00 10/17 23:00 10/17 23:00
WT1 10/17 23:00    
WV1      
WV2 10/17 20:00 10/17 20:00