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

December 01, 2023 08:06 (ET) (All times are in ET)
Agency Ozone PM2.5 PM10
AB1 12/01 06:00 12/01 06:00 02/25 09:00
AF1   08/15 08:00  
AIR   12/01 05:00  
AKC      
AL1 11/01 07:00 12/01 06:00 12/01 06:00
AL2 12/01 06:00 12/01 06:00 12/01 06:00
AL3      
AL4 11/01 09:00 12/01 06:00 12/01 06:00
ALG   12/01 06:00  
AZ2 12/01 06:00 12/01 06:00 12/01 06:00
AZ3 12/01 06:00 12/01 06:00 12/01 06:00
AZ4 12/01 06:00 12/01 06:00 12/01 06:00
AZE   12/01 07:00  
BAA   03/16 16:00  
BC1 12/01 06:00 12/01 06:00 12/01 06:00
BC2 12/01 06:00 12/01 06:00 12/01 06:00
BFA   12/01 07:00  
BH2   12/01 06:00  
BI1   12/01 06:00  
BIH   12/01 07:00  
BK1      
BLK 12/01 06:00 12/01 06:00 12/01 06:00
BLW 12/01 06:00 12/01 06:00  
BPT 12/01 06:00 12/01 06:00 12/01 06:00
BR1   12/01 05:00  
BZ1   12/01 06:00  
CA0 12/01 06:00 12/01 06:00 12/01 06:00
CA1 12/01 06:00 12/01 06:00 08/27 03:00
CA2 12/01 06:00 12/01 06:00  
CA3 12/01 06:00 12/01 06:00 12/01 06:00
CA4 12/01 06:00 12/01 06:00 12/01 06:00
CA8 12/01 06:00 12/01 06:00 12/01 06:00
CA9 12/01 06:00 12/01 06:00 12/01 06:00
CAT 11/06 09:00 11/28 10:00  
CHD   12/01 06:00  
CHO 11/29 13:00    
CI1   12/01 06:00  
CMB   11/16 08:00  
CN1      
CN3 12/01 06:00 11/22 21:00 05/21 01:00
CN4      
CO1 11/28 15:00 11/28 15:00 11/28 15:00
CO4      
COG   05/09 10:00  
CRI   09/13 18:00  
CT1 12/01 06:00 12/01 06:00 12/01 06:00
CUR 11/01 02:00 05/19 10:00  
DC1 12/01 06:00 12/01 06:00 09/07 08:00
DE1 12/01 06:00 12/01 06:00  
DN1      
DRN   07/11 09:00  
DUS   12/01 06:00  
EKD   12/01 06:00  
EMU      
EP1      
EPA   08/21 12:00  
FL0      
FL1 12/01 06:00 12/01 06:00 12/01 06:00
FL2 12/01 07:00 12/01 06:00 12/01 06:00
FL3 12/01 06:00 12/01 06:00 12/01 06:00
FL4 12/01 06:00 12/01 06:00 12/01 06:00
FL7      
FS1 12/01 06:00 12/01 07:00 12/01 07:00
GAB   03/10 02:00  
GBU 12/01 06:00 12/01 06:00 12/01 06:00
GFC      
GH1   12/01 06:00  
GN1   10/31 12:00  
GOL      
GT1 06/28 08:00 10/11 19:00 10/24 10:00
HC1   12/01 06:00  
HI1 12/01 06:00 12/01 06:00 12/01 06:00
IA2   12/01 06:00  
IA3 11/01 07:00 12/01 06:00  
IL1 12/01 06:00 12/01 06:00  
JCE      
JDA   12/01 06:00  
JOR 09/09 23:00 09/09 23:00  
JP1 12/30 02:00 12/30 02:00 12/30 02:00
KAZ   12/01 06:00  
KE1   11/25 10:00  
KM1 12/01 07:00 12/01 07:00  
KS1 12/01 06:00 12/01 06:00 12/01 06:00
KY1 11/13 12:00 12/01 06:00  
KY2 12/01 06:00 12/01 06:00 12/01 06:00
KYI   09/17 09:00  
KZ1   12/01 06:00  
LA1 12/01 07:00 12/01 07:00 11/01 00:00
LAO   11/29 22:00  
LC1      
LEM   12/01 06:00  
LPS      
MA1 12/01 06:00 12/01 06:00 12/01 06:00
MAD   12/01 06:00  
MD1 12/01 06:00 12/01 06:00 12/01 06:00
ME1 12/01 06:00 12/01 06:00 12/01 06:00
MEN 12/01 05:00 12/01 06:00 12/01 06:00
MEX   12/01 07:00  
MGN      
ML1   10/17 08:00  
MM1 12/01 07:00 12/01 07:00  
MMR   12/01 07:00  
MOE      
MON 12/01 06:00 12/01 06:00 12/01 06:00
MS1 12/01 06:00 12/01 06:00 12/01 06:00
MT1 12/01 06:00 12/01 06:00 12/01 06:00
MX2 12/01 06:00 12/01 06:00 12/01 06:00
MY1   12/01 07:00  
NC2 12/01 06:00 12/01 06:00 12/01 06:00
NCA 12/01 06:00 12/01 06:00 12/01 06:00
ND1 12/01 06:00 12/01 06:00 12/01 06:00
NE2 12/01 06:00 12/01 06:00 12/01 06:00
NEA   12/01 07:00  
NH1 12/01 06:00 12/01 06:00 12/01 06:00
NI1   12/01 06:00  
NI2   10/05 09:00  
NJ1 12/01 06:00 12/01 06:00  
NL1 12/01 06:00 12/01 06:00 12/01 06:00
NM2 12/01 06:00 12/01 06:00 12/01 06:00
NOS 12/01 06:00 12/01 06:00  
NPS 12/01 06:00 12/01 06:00  
NRB   12/31 18:26 12/31 18:26
NV2 12/01 06:00 12/01 06:00 12/01 06:00
NV3 12/01 06:00 12/01 06:00 12/01 06:00
OAP 11/30 21:00    
OAQ 12/01 06:00 12/01 06:00 12/01 06:00
OAR      
OCN      
OD1   06/06 13:00  
OH1 12/01 06:00 12/01 06:00 12/01 06:00
OR1 12/01 06:00 12/01 06:00  
OR2 10/05 12:00 12/01 07:00  
OTH      
PA2 12/01 06:00 12/01 06:00 12/01 06:00
PA3 12/01 06:00 12/01 06:00  
PAR   12/01 07:00  
PH1   12/01 06:00  
PIN      
PK1   12/01 06:00  
PK2   11/29 07:00  
PK3   12/01 06:00  
PK4   12/01 06:00  
QA1 09/19 06:00 11/30 03:00  
RI1 12/01 06:00 12/01 06:00  
RIY   12/30 04:00  
RT9      
RWA   12/01 06:00  
SC1 12/01 06:00 12/01 06:00 12/01 06:00
SCS      
SEN   12/01 07:00  
SFN 03/05 07:00    
SHA 12/01 06:00 12/01 06:00  
SIC      
SK1 12/01 06:00 12/01 06:00  
SLO 12/01 06:00 12/01 06:00 12/01 06:00
SMA 02/04 05:00 02/04 05:00 08/07 09:00
SMJ 12/01 06:00 12/01 06:00 12/01 06:00
SMS      
SR1 12/01 06:00   12/01 06:00
SU1   05/04 14:00  
SY1   12/01 06:00  
TEL      
THM 12/01 06:00 12/01 06:00 12/01 06:00
TKM      
TN2 12/01 06:00 12/01 06:00 06/30 23:00
TN3 12/01 06:00 12/01 06:00 07/01 00:00
TNC      
TOG   12/01 06:00  
TPCD 12/01 06:00 12/01 06:00 12/01 06:00
TRP   12/01 06:00  
TRX 12/01 08:00 12/01 06:00 12/01 08:00
TSI      
TX1 12/01 05:00 12/01 05:00 12/01 05:00
UDA      
UGS      
UNR      
UTE 12/01 06:00 06/01 01:00  
UTM      
UZB 11/27 13:00 12/01 06:00  
VA1 12/01 06:00 12/01 06:00 12/01 06:00
VG1   01/23 19:24  
VT1 12/01 06:00 12/01 06:00 12/01 06:00
WA1 12/01 06:00 12/01 06:00 12/01 06:00
WES      
WI1 12/01 06:00 12/01 06:00 12/01 06:00
WT1 12/01 06:00    
WV2 12/01 06:00 12/01 06:00  
YER   06/15 07:00