Monthly System Maintenance Thursday, September 28th, 7:00 p.m. to Midnight ET.

The AirNow Data Management Center will be performing routine system maintenance on Thursday, September 28th, 2023 from 7:00pm – Midnight ET. Data feeds and websites, including www.airnowapi.org, https://www.airnowtech.org/, and https://files.airnowtech.org/ may be unavailable or have delayed updates until maintenance is completed.

Posted September 21, 2023, 10:30 (PT)

Update to minimum TLS requirements for https://files.airnowtech.org connections

Dear AirNow users,

Beginning December 31st, 2023, connections made to https://files.airnowtech.org must use Transport Layer Security (TLS) 1.2 or higher. Prior to December 31st, users connecting with TLS 1.1 or lower may experience occasional connection deprecation. For the vast majority of users accessing the site via web browser or connecting via automated script, there will be no impact. However, a small amount of users may need to update scripts if connecting to https://files.airnowtech.org using TLS 1.1 or lower.

Thank you,
AirNow Data Management Center

Posted August 15, 2023, 11:16 (PT)

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

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

September 25, 2023 01:50 (ET) (All times are in ET)
Agency Ozone PM2.5 PM10
AB1 09/25 00:00 09/25 00:00 02/25 09:00
AF1   08/15 08:00  
AIR   09/25 00:00  
AKC      
AL1 09/25 00:00 09/25 00:00 09/25 00:00
AL2 09/25 00:00 09/25 00:00 09/25 00:00
AL3      
AL4 09/25 00:00 09/25 00:00 09/25 00:00
ALG   09/25 00:00  
AZ2 09/25 00:00 09/25 00:00 09/25 00:00
AZ3 09/25 00:00 09/25 00:00 09/25 00:00
AZ4 09/25 00:00 09/25 00:00 09/25 00:00
AZE   09/25 01:00  
BAA   03/16 16:00  
BC1 09/25 00:00 09/25 00:00 09/25 00:00
BC2 09/25 00:00 09/25 00:00 09/25 00:00
BFA   09/25 01:00  
BH2   09/25 01:00  
BI1   09/25 00:00  
BIH   09/25 01:00  
BK1      
BLK 09/25 00:00 09/25 00:00 09/25 00:00
BLW 09/25 00:00 09/25 00:00  
BPT 09/25 00:00 09/25 00:00 09/25 00:00
BR1   09/25 00:00  
BZ1   09/25 00:00  
CA0 09/25 00:00 09/25 00:00 09/25 00:00
CA1 09/25 00:00 09/25 00:00 08/27 03:00
CA2 09/25 00:00 09/25 00:00  
CA3 09/25 00:00 09/25 00:00 09/25 00:00
CA4 09/25 00:00 09/25 00:00 09/25 00:00
CA8 09/25 00:00 09/25 00:00 09/25 00:00
CA9 09/25 00:00 09/25 00:00 09/25 00:00
CAT 09/25 01:00 09/25 01:00  
CHD   09/25 00:00  
CHO 11/29 13:00    
CI1   09/24 23:00  
CMB   09/25 00:00  
CN1      
CN3 09/25 00:00 09/25 00:00 05/21 01:00
CN4      
CO1 09/24 23:00 09/24 23:00 09/24 23:00
CO4      
COG   05/09 10:00  
CRI   09/13 18:00  
CT1 09/24 23:00 09/25 00:00 09/25 00:00
CUR 09/25 00:00 05/19 10:00  
DC1 09/25 00:00 09/25 00:00 09/07 08:00
DE1 09/25 00:00 09/25 00:00  
DN1      
DRN   07/11 09:00  
DUS   09/20 22:00  
EKD   09/25 00:00  
EMU      
EP1      
EPA   08/21 12:00  
FL0      
FL1 09/25 00:00 09/25 00:00 09/25 00:00
FL2 09/25 00:00 09/25 00:00 09/25 00:00
FL3 09/25 00:00 09/25 00:00 09/25 00:00
FL4 09/25 00:00 09/25 00:00 09/25 00:00
FL7      
FS1 09/25 00:00 09/25 01:00 09/25 01:00
GAB   03/10 02:00  
GBU 09/25 00:00 09/25 00:00 09/25 00:00
GFC      
GH1   09/25 00:00  
GN1   09/25 00:00  
GOL      
GT1 06/28 08:00 09/25 00:00 09/25 00:00
HC1   09/25 00:00  
HI1 09/25 00:00 09/25 00:00 09/25 00:00
IA2 09/25 00:00 09/25 00:00  
IA3 09/25 00:00 09/25 00:00  
IL1 09/25 00:00 09/25 00:00  
JDA   09/25 00:00  
JOR 09/09 23:00 09/09 23:00  
JP1 12/30 02:00 12/30 02:00 12/30 02:00
KAZ   09/25 00:00  
KE1   09/24 23:00  
KM1 09/25 00:00 09/25 01:00  
KS1 09/25 00:00 09/25 00:00 09/25 00:00
KY1 09/25 00:00 09/25 00:00  
KY2 09/25 00:00 09/25 00:00 09/25 00:00
KYI   09/17 09:00  
KZ1   09/24 23:00  
LA1 09/25 00:00 09/25 00:00 09/01 00:00
LAO   09/25 00:00  
LC1      
LEM   09/24 12:00  
LPS      
MA1 09/25 00:00 09/25 00:00 09/19 01:59
MAD   09/25 00:00  
MD1 09/25 00:00 09/25 00:00 09/25 00:00
ME1 09/25 00:00 09/25 00:00 09/25 00:00
MEN 09/23 05:00 09/23 05:00 09/23 05:00
MEX   09/25 00:00  
MGN      
ML1   09/25 00:00  
MM1 09/25 00:00 09/25 00:00  
MMR   09/25 01:00  
MOE      
MON 09/25 00:00 09/25 00:00 09/25 00:00
MS1 09/25 00:00 09/25 00:00 09/25 00:00
MT1 09/25 00:00 09/25 00:00 09/25 00:00
MX2      
MY1   09/25 00:00  
NC2 09/25 00:00 09/25 00:00 09/25 00:00
NCA 09/25 00:00 09/25 00:00 09/25 00:00
ND1 09/25 00:00 09/25 00:00 09/25 00:00
NE2 09/25 00:00 09/25 00:00 09/25 00:00
NEA   09/25 01:00  
NH1 09/25 00:00 09/25 00:00 09/25 00:00
NI1   09/25 00:00  
NI2   09/24 23:00  
NJ1 09/25 00:00 09/25 00:00  
NL1 09/25 00:00 09/25 00:00 09/25 00:00
NM2 09/25 00:00 09/25 00:00 09/25 00:00
NOS 09/25 00:00 09/25 00:00  
NPS 09/25 00:00 09/25 00:00  
NRB   12/31 18:26 12/31 18:26
NV2 09/25 00:00 09/25 00:00 09/25 00:00
NV3 09/25 00:00 09/25 00:00 09/25 00:00
OAP 09/25 00:00    
OAQ 09/22 21:00 09/22 21:00 09/22 21:00
OAR      
OCN      
OD1   06/06 13:00  
OH1 09/25 00:00 09/25 00:00 09/25 00:00
OR1 09/25 00:00 09/25 00:00  
OR2 09/25 00:00 09/25 00:00  
PA3 09/25 00:00 09/25 00:00  
PAR   09/25 00:00  
PH1   09/25 00:00  
PIN      
PK1   09/25 00:00  
PK2   09/17 18:00  
PK3   09/25 00:00  
PK4   09/25 00:00  
QA1 09/19 06:00 09/25 01:00  
RI1 09/25 00:00 09/25 00:00  
RIY   12/30 04:00  
RT9      
RWA   09/15 09:00  
SC1 09/25 00:00 09/25 00:00 09/25 00:00
SCS      
SEN   09/25 01:00  
SFN 03/05 07:00    
SHA 09/25 00:00 09/25 00:00  
SIC      
SK1 09/25 00:00 09/25 00:00  
SLO 09/25 00:00 09/25 00:00 09/25 00:00
SMA 02/04 05:00 02/04 05:00 08/07 09:00
SMJ 09/24 23:00 09/24 23:00 09/24 23:00
SMS      
SR1 09/25 00:00   09/25 00:00
SU1   05/04 14:00  
SY1   09/25 00:00  
THM 09/25 00:00 09/25 00:00 09/25 00:00
TKM      
TN2 09/25 00:00 09/25 00:00 06/30 23:00
TN3 09/25 00:00 09/25 00:00 04/01 00:00
TNC      
TOG   09/25 00:00  
TPCD 09/25 00:00 09/25 00:00 09/25 00:00
TRP   09/25 00:00  
TRX 09/25 02:00 09/25 01:00 09/25 02:00
TSI      
TX1 09/25 00:00 09/25 00:00 09/25 00:00
UDA      
UGS      
UNR      
UTE 09/25 00:00 06/01 01:00  
UTM      
UZB 09/25 00:00 09/25 00:00  
VA1 09/25 00:00 09/25 00:00 09/25 00:00
VG1   01/23 19:24  
VT1 09/25 00:00 09/25 00:00 09/25 00:00
WA1 09/25 00:00 09/25 00:00 09/25 00:00
WES      
WI1 09/25 00:00 09/25 00:00 09/25 00:00
WT1 09/25 00:00    
WV2 09/24 20:00 09/24 20:00  
YER   06/15 07:00