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

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

May 20, 2019 00:25 (ET) (All times are in ET)
Agency Ozone PM2.5 PM10
AB1 05/19 22:00 05/19 22:00 02/25 09:00
AF1   03/15 08:00  
AIR      
AKC      
AL1 05/19 22:00 05/20 01:00 03/01 09:00
AL2 05/19 23:00 05/19 23:00 05/19 23:00
AL3      
AL4 05/19 22:00 05/19 22:00  
ALG   05/19 22:00  
AR1 05/19 23:00 05/19 23:00  
AZ2 05/19 23:00 05/19 23:00 05/19 23:00
AZ3 05/19 23:00 05/19 23:00 05/19 23:00
AZ4 05/19 23:00 05/19 23:00 05/19 23:00
BAA   05/10 18:00  
BC1 05/19 23:00 05/19 23:00 05/19 23:00
BC2 05/19 23:00 05/19 23:00 05/19 23:00
BI1   05/19 23:00  
BIH   05/20 00:00  
BK1      
BLW 05/19 23:00 04/01 01:00  
BPT 05/19 23:00 05/19 22:00 04/14 18:00
CA0 05/19 23:00 05/19 23:00 05/19 23:00
CA1 05/19 23:00 05/19 23:00 08/27 03:00
CA2 05/19 14:00 05/19 14:00  
CA3 05/19 23:00 05/19 23:00 05/19 23:00
CA4 05/19 23:00 05/19 23:00  
CA5 05/19 23:00 05/19 23:00 05/19 23:00
CA6 05/19 22:00 05/19 22:00 05/19 22:00
CA7 05/19 23:00 05/19 23:00 05/19 23:00
CA8 05/19 23:00 05/19 23:00 05/19 23:00
CA9 05/19 23:00 05/19 23:00 05/19 23:00
CAT 05/19 23:00 05/19 23:00  
CHO 05/16 15:00    
CK1 05/19 23:00 05/19 23:00 05/19 23:00
CMB   05/19 23:00  
CN1 05/19 23:00 05/19 23:00  
CN3 05/19 23:00 05/19 23:00 05/19 23:00
CN4 05/19 23:00 05/19 23:00  
CO1 05/19 23:00 05/19 23:00 05/19 23:00
CO4      
CRI   05/06 12:00  
CT1 05/19 23:00 05/19 23:00 05/19 23:00
CUR 05/19 22:00 05/19 22:00  
DC1 05/19 23:00 05/20 00:22 05/19 23:00
DE1 05/19 23:00 05/19 23:00  
DN1      
DRN   05/15 07:00  
DUS   05/20 04:00  
EP1      
EPA   08/21 12:00  
FL1 05/19 23:00 05/19 23:00 05/19 22:00
FL2 05/19 23:00 05/19 23:00 09/29 15:00
FL3 05/19 23:00 05/19 23:00 05/19 23:00
FL4 05/19 23:00 05/19 23:00 05/19 23:00
FS1 05/19 23:00 05/20 00:00 08/05 04:00
GBU 05/19 23:00 05/19 23:00 05/19 23:00
GOL      
HC1   05/19 22:00  
HI1 05/19 23:00 05/19 23:00 05/19 23:00
IA1 05/19 23:00 05/19 23:00 05/19 23:00
IA2 05/19 23:00 05/19 23:00  
IA3 05/18 19:00 05/18 19:00  
ID1 05/19 23:00 05/20 00:00 05/19 23:00
IEG 05/19 23:00 05/19 23:00 05/19 23:00
IL1 05/19 23:00 05/19 23:00  
IN4 05/19 23:00 05/19 23:00 05/19 23:00
JDA   05/18 01:11  
JOR      
JP1 12/30 02:00 12/30 02:00 12/30 02:00
KAZ   05/19 22:00  
KM1 05/19 23:00 05/19 23:00  
KS1 05/19 23:00 05/19 23:00 05/19 23:00
KY2 05/19 23:00 05/19 23:00 05/19 23:00
LA1 05/19 23:00 05/19 23:00 02/01 00:00
LAO      
LC1      
MA1 05/19 22:00 05/19 22:00  
MAD   05/19 14:00  
MD1 05/19 23:00 05/19 23:00  
ME1 05/19 22:00 05/19 22:00 05/19 22:00
MEN 05/19 23:00 05/19 23:00 05/19 19:00
MI1 05/17 02:00 05/17 02:00 05/17 02:00
MM1 05/19 23:00 05/19 23:00  
MMR   05/20 05:00  
MO1 05/19 23:00 05/19 23:00 05/19 23:00
MOE      
MON 05/17 13:00 05/17 13:00 05/17 13:00
MS1 05/19 23:00 05/19 23:00  
MT1 05/19 23:00 05/19 23:00 05/19 23:00
NC2 05/19 23:00 05/19 23:00  
NCA 05/19 23:00 05/17 09:00 05/19 23:00
NE1      
NE2 05/19 23:00 05/19 23:00 05/19 23:00
NEA      
NH1 05/19 23:00 05/19 23:00 05/19 23:00
NJ1 05/19 23:00 05/19 23:00  
NL1 05/19 22:00 05/19 22:00  
NM2 05/19 23:00 05/19 23:00 05/19 23:00
NOS 05/19 21:00 05/19 22:00  
NPS 05/19 23:00 05/19 23:00  
NRB   05/19 23:14 05/19 23:14
NV2 05/19 23:00 05/19 23:00 05/19 23:00
NV3 05/19 23:00 05/19 23:00 05/19 23:00
NY1 02/04 11:00 02/04 11:00 02/04 11:00
OAP 05/19 23:00    
OAQ 05/19 23:00 05/19 23:00 05/19 23:00
OAR      
OH1 05/19 23:00 05/19 23:00 05/19 23:00
OK1 05/19 23:00 05/19 23:00 05/19 23:00
OR1 05/19 23:00 05/19 23:00  
OR2 05/19 23:00 05/19 23:00  
PA1 05/19 23:00 05/19 23:00 06/30 23:00
PA3 05/19 23:00 05/19 23:00  
PIN      
PK1   05/19 23:00  
PK2      
PK3   05/19 23:00  
PK4   05/12 15:11  
PR1 05/19 22:00 05/19 23:00 05/19 23:00
RI1 05/19 23:00 05/19 23:00  
RIY      
SC1 05/19 22:00 05/19 22:00 05/19 22:00
SD1 05/19 23:00 05/19 23:00 05/19 23:00
SFN 03/05 07:00    
SHA 05/19 23:00 05/19 23:00  
SIC      
SIS 05/19 23:00 05/19 23:00  
SK1 05/19 23:00 05/19 23:00 08/21 16:00
SLO 05/19 23:00 05/19 23:00 05/19 23:00
SMJ 08/07 09:00   08/07 09:00
SR1 05/19 23:00   05/19 23:00
SY1   05/19 23:00  
THM 05/19 23:00 05/20 00:00  
TKM      
TN1 05/19 22:00 05/19 22:00  
TN2 05/19 23:00 05/19 22:00 01/01 00:00
TN3 05/19 23:00 05/19 23:00 11/01 00:00
TN4 05/19 23:00 05/19 23:00  
TPCD 05/19 22:00 05/19 22:00 05/19 22:00
TRX 05/19 23:00 05/19 23:00 05/19 23:00
TX1 05/19 23:00 05/19 23:00 05/19 23:00
UDA      
UNR      
UT1 05/19 23:00 05/19 23:00 05/19 23:00
UTE 05/19 23:00 06/01 01:00  
UZB 05/19 23:00 04/19 02:00  
VA1 05/19 23:00 05/19 23:00  
VG1   01/23 19:24  
VT1 05/19 23:00 05/19 23:00 05/19 23:00
WI1 05/19 23:00 05/19 23:00 05/19 23:00
WT1 05/19 23:00    
WV1      
WV2 05/19 20:00 05/19 20:00