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

Register with AirNow API for an automatic feed of AirNow air quality data

No news events currently available.

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

April 25, 2017 13:24 (ET) (All times are in ET)
Agency Ozone PM2.5 PM10
AB1 04/25 11:00 04/25 11:00 02/25 09:00
AIR      
AK1 04/25 12:00 04/25 12:00 04/25 12:00
AL1 04/25 12:00 04/25 11:00 10/28 13:00
AL2 04/25 12:00 04/25 12:00 04/25 12:00
AL3      
AL4 04/25 11:00 04/25 11:00  
AR1 04/25 12:00 04/25 12:00  
AZ1 04/25 11:00 04/25 11:00 04/25 11:00
AZ2 04/25 12:00 04/25 12:00 04/25 12:00
AZ3 04/25 12:00 04/25 12:00 04/25 09:00
AZ4 04/25 12:00   04/25 12:00
BC1 04/25 12:00 04/25 12:00 04/25 12:00
BC2 04/25 12:00 04/25 12:00 04/25 12:00
BLW 04/25 12:00 10/01 01:00  
CA0 04/25 12:00 04/25 12:00 04/25 12:00
CA1 04/25 12:00 04/25 12:00 04/25 12:00
CA2 04/25 12:00 04/25 12:00  
CA3 04/25 11:00 04/25 11:00 04/25 11:00
CA4 04/25 12:00 04/25 12:00  
CA5 04/25 12:00 04/25 12:00 04/25 12:00
CA6 04/25 11:00 04/25 11:00 04/25 11:00
CA7 04/25 12:00 04/25 12:00 04/25 12:00
CA8 04/25 12:00 04/25 13:00 04/25 12:00
CA9 04/25 12:00 04/25 12:00 04/25 12:00
CHO 04/25 13:00    
CK1 04/25 12:00 04/25 12:00 04/25 12:00
CMB      
CN1 04/25 12:00 04/25 12:00  
CN2 04/25 12:00    
CN3 04/25 12:00 04/25 12:00 04/25 12:00
CN4 04/25 11:00 04/25 11:00  
CO1 04/25 12:00 04/25 12:00 04/25 12:00
CO4      
CT1 04/25 12:00 04/25 12:00 04/25 12:00
DC1 04/25 12:00 04/25 13:24 04/25 11:00
DE1 04/25 12:00 04/25 12:00  
DN1 04/25 12:00    
EP1      
EPA   08/21 12:00  
FL2 04/25 12:00 04/25 12:00  
FL3 04/25 11:00 04/22 21:00 04/25 12:00
FL4 04/25 12:00 04/25 12:00 04/25 12:00
FS1   04/25 12:00 08/04 20:00
GBU 01/19 13:00 04/25 12:00 04/25 12:00
GOL      
HI1 04/25 12:00 04/25 12:00 04/25 12:00
IA1 04/25 12:00 04/25 12:00 04/25 12:00
IA2 04/25 12:00 04/25 12:00  
IA3 04/25 12:00 04/25 12:00  
ID1 04/25 12:00 04/25 12:00 04/25 12:00
IEG 04/25 12:00 04/25 12:00 04/25 12:00
IL1 04/25 12:00 04/25 12:00  
IN4 04/25 12:00 04/25 12:00 04/25 12:00
JP1 12/30 02:00 12/30 02:00 12/30 02:00
KM1 04/25 12:00 04/25 12:00  
KS1 04/25 12:00 04/25 12:00 04/25 12:00
KY1 04/25 12:00 04/25 12:00  
LA1 04/25 12:00 04/25 12:00 04/25 12:00
LC1      
MA1 04/25 11:00 04/25 11:00  
MD1 04/25 12:00 04/25 12:00  
ME1 04/25 12:00 04/25 12:00 04/25 12:00
MEN 04/25 12:00 04/25 12:00 04/25 12:00
MI1 04/25 12:00 04/25 12:00 04/25 12:00
MM1 04/25 12:00 04/25 12:00  
MO1 04/25 12:00 04/25 12:00 04/25 12:00
MON 04/25 11:00 04/25 12:00 04/25 11:00
MS1 04/25 12:00 04/25 12:00  
MT1 04/25 12:00 04/25 12:00 04/25 12:00
MX1 10/27 03:00 04/25 12:00 03/31 10:00
NC1 04/25 12:00 04/25 12:00 04/25 12:00
NC3 04/25 12:00 04/25 12:00 11/30 23:00
NCA 04/25 11:00 04/25 11:00  
NE1 04/25 12:00 04/25 12:00 04/25 06:00
NE2 04/25 12:00 04/25 12:00 04/25 12:00
NH1 04/25 12:00 04/25 12:00 04/25 12:00
NJ1 04/25 12:00 04/25 12:00  
NL1 04/25 12:00 04/25 12:00  
NM1 04/25 12:00 04/25 12:00 04/25 12:00
NM2 04/25 12:00 04/25 12:00 04/25 12:00
NOS 04/25 11:00 04/25 11:00  
NPS 04/25 12:00 04/25 12:00  
NV1 04/25 12:00 04/25 12:00 04/25 12:00
NV2 04/25 12:00 04/25 12:00 04/25 12:00
NV3 04/25 12:00 04/25 12:00  
NY1 04/25 11:00 04/25 11:00 04/25 11:00
OAP 04/25 12:00    
OAQ 04/20 04:00 04/20 05:00 04/20 05:00
OAR      
OH1 04/25 12:00 04/25 12:00 04/25 12:00
OK1 04/25 12:00 04/25 12:00 04/25 12:00
OR1 04/25 11:00 04/25 11:00  
OR2 10/03 14:00 04/25 12:00  
PA1 04/25 12:00 04/25 12:00 12/31 18:00
PA3 04/25 12:00 04/25 12:00  
PIN 06/08 23:00    
PR1 04/25 09:00 04/25 09:00 04/25 09:00
QT1 12/01 08:00 04/25 12:00  
RI1 04/25 12:00 04/25 12:00  
SC1 04/25 12:00 04/25 12:00 04/25 12:00
SD1 04/25 12:00 04/25 12:00 04/25 12:00
SFN 03/05 07:00    
SHA 04/25 12:00 04/25 12:00  
SIC      
SK1 04/25 12:00 04/25 12:00 08/21 16:00
SLO 04/25 12:00 04/25 12:00 04/25 12:00
SMJ 07/22 17:00   07/22 17:00
SR1 04/25 12:00   04/25 12:00
THM 09/01 10:00 02/10 16:00  
TN1 04/25 11:00 04/25 11:00  
TN2 04/25 12:00 04/25 11:00  
TN3 04/25 12:00 04/25 12:00  
TN4 04/25 12:00 04/25 12:00  
TPCD 01/30 19:00   01/30 19:00
TRX 04/25 12:00 04/25 12:00 04/25 12:00
TX1 04/25 12:00 04/25 12:00 04/25 12:00
UDA      
UNR      
UT1 04/25 12:00 04/25 12:00 04/26 13:00
UTS 04/25 12:00 04/25 12:00  
VA1 04/25 12:00 04/25 12:00  
VG1   04/21 03:12  
VT1 04/25 12:00 04/25 12:00  
WI1 04/25 11:00 04/25 11:00 04/25 11:00
WT1 04/25 12:00    
WV1      
WV2 04/25 12:00 04/25 12:00