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

October 02, 2023 20:57 (ET) (All times are in ET)
Agency Ozone PM2.5 PM10
AB1 10/02 19:00 10/02 19:00 02/25 09:00
AF1   08/15 08:00  
AIR   10/02 19:00  
AKC      
AL1 10/02 19:00 10/02 19:00 10/02 19:00
AL2 10/02 19:00 10/02 19:00 10/02 19:00
AL3      
AL4 10/02 19:00 10/02 19:00 10/02 19:00
ALG   10/02 19:00  
AZ2 10/02 19:00 10/02 19:00 10/02 19:00
AZ3 10/02 19:00 10/02 19:00 10/02 19:00
AZ4 10/02 19:00 10/02 19:00 10/02 19:00
AZE   10/02 20:00  
BAA   03/16 16:00  
BC1 10/02 19:00 10/02 19:00 10/02 19:00
BC2 10/02 19:00 10/02 19:00 10/02 19:00
BFA   09/25 15:00  
BH2   10/02 20:00  
BI1   10/02 19:00  
BIH   10/02 20:00  
BK1      
BLK 10/02 19:00 10/02 19:00 10/02 19:00
BLW 10/02 19:00 10/02 19:00  
BPT 10/02 13:00 10/02 13:00 10/02 13:00
BR1   10/02 19:00  
BZ1   10/01 08:00  
CA0 10/02 19:00 10/02 19:00 10/02 19:00
CA1 10/02 19:00 10/02 19:00 08/27 03:00
CA2 10/02 19:00 10/02 19:00  
CA3 10/02 19:00 10/02 19:00 10/02 19:00
CA4 10/02 19:00 10/02 19:00 10/02 19:00
CA8 10/02 19:00 10/02 19:00 10/02 19:00
CA9 10/02 19:00 10/02 19:00 10/02 19:00
CAT 10/02 20:00 10/02 20:00  
CHD   10/02 19:00  
CHO 11/29 13:00    
CI1   10/02 19:00  
CMB   10/02 20:00  
CN1      
CN3 10/02 19:00 10/02 19:00 05/21 01:00
CN4      
CO1 10/02 18:00 10/02 18:00 10/02 18:00
CO4      
COG   05/09 10:00  
CRI   09/13 18:00  
CT1 10/02 19:00 10/02 19:00 10/02 19:00
CUR 10/02 20:00 05/19 10:00  
DC1 10/02 19:00 10/02 19:00 09/07 08:00
DE1 10/02 19:00 10/02 19:00  
DN1      
DRN   07/11 09:00  
DUS   10/02 19:00  
EKD   10/02 19:00  
EMU      
EP1      
EPA   08/21 12:00  
FL0      
FL1 10/02 19:00 10/02 19:00 10/02 19:00
FL2 10/02 19:00 10/02 19:00 10/02 19:00
FL3 10/02 19:00 10/02 19:00 10/02 19:00
FL4 10/02 19:00 10/02 19:00 10/02 19:00
FL7      
FS1 10/02 19:00 10/02 20:00 10/02 20:00
GAB   03/10 02:00  
GBU 10/02 19:00 10/02 19:00 10/02 19:00
GFC      
GH1   10/02 19:00  
GN1   10/02 19:00  
GOL      
GT1 06/28 08:00 10/02 19:00 10/02 19:00
HC1   10/02 19:00  
HI1 10/02 19:00 10/02 19:00 10/02 19:00
IA2 10/02 19:00 10/02 19:00  
IA3 10/02 19:00 10/02 19:00  
IL1 10/02 19:00 10/02 19:00  
JDA   10/02 08:00  
JOR 09/09 23:00 09/09 23:00  
JP1 12/30 02:00 12/30 02:00 12/30 02:00
KAZ   10/02 19:00  
KE1   10/02 18:00  
KM1 10/02 20:00 10/02 20:00  
KS1 10/02 19:00 10/02 19:00 10/02 19:00
KY1 10/02 19:00 10/02 19:00  
KY2 10/02 19:00 10/02 19:00 10/02 19:00
KYI   09/17 09:00  
KZ1   10/02 19:00  
LA1 10/02 19:00 10/02 19:00 09/01 00:00
LAO   10/02 19:00  
LC1      
LEM   10/02 19:00  
LPS      
MA1 10/02 19:00 10/02 19:00 09/19 01:59
MAD   10/02 19:00  
MD1 10/02 19:00 10/02 19:00 10/02 19:00
ME1 10/02 19:00 10/02 19:00 10/02 19:00
MEN 10/02 19:00 10/02 19:00 10/02 19:00
MEX   10/02 19:00  
MGN      
ML1   10/02 19:00  
MM1 10/02 19:00 10/02 19:00  
MMR   10/02 20:00  
MOE      
MON 10/02 19:00 10/02 19:00 10/02 19:00
MS1 10/02 19:00 10/02 19:00 10/02 19:00
MT1 10/02 19:00 10/02 19:00 10/02 19:00
MX2      
MY1   10/02 19:00  
NC2 10/02 19:00 10/02 19:00 10/02 19:00
NCA 10/02 19:00 10/02 19:00 10/02 19:00
ND1 10/02 19:00 10/02 19:00 10/02 19:00
NE2 10/02 19:00 10/02 19:00 10/02 19:00
NEA   10/02 20:00  
NH1 10/02 19:00 10/02 19:00 10/02 19:00
NI1   10/02 19:00  
NI2   10/02 18:00  
NJ1 10/02 19:00 10/02 19:00  
NL1 10/02 19:00 10/02 19:00 10/02 19:00
NM2 10/02 19:00 10/02 19:00 10/02 19:00
NOS 10/02 19:00 10/02 19:00  
NPS 10/02 19:00 10/02 19:00  
NRB   12/31 18:26 12/31 18:26
NV2 10/02 19:00 10/02 19:00 10/02 19:00
NV3 10/02 19:00 10/02 19:00 10/02 19:00
OAP 10/02 19:00    
OAQ 10/02 19:00 10/02 19:00 10/02 19:00
OAR      
OCN      
OD1   06/06 13:00  
OH1 10/02 19:00 10/02 19:00 10/02 19:00
OR1 10/02 19:00 10/02 19:00  
OR2 10/02 19:00 10/02 19:00  
PA3 10/02 19:00 10/02 19:00  
PAR   10/02 20:00  
PH1   10/02 19:00  
PIN      
PK1   10/02 19:00  
PK2   10/02 19:00  
PK3   10/02 19:00  
PK4   10/02 19:00  
QA1 09/19 06:00 10/02 20:00  
RI1 10/02 19:00 10/02 19:00  
RIY   12/30 04:00  
RT9      
RWA   09/15 09:00  
SC1 10/02 19:00 10/02 19:00 10/02 19:00
SCS      
SEN   10/02 20:00  
SFN 03/05 07:00    
SHA 10/02 19:00 10/02 19:00  
SIC      
SK1 10/02 19:00 10/02 19:00  
SLO 10/02 19:00 10/02 19:00 10/02 19:00
SMA 02/04 05:00 02/04 05:00 08/07 09:00
SMJ 10/02 19:00 10/02 19:00 10/02 19:00
SMS      
SR1 10/02 19:00   10/02 19:00
SU1   05/04 14:00  
SY1   10/02 19:00  
THM 10/02 19:00 10/02 19:00 10/02 19:00
TKM      
TN2 10/02 19:00 10/02 19:00 06/30 23:00
TN3 10/02 19:00 10/02 19:00 04/01 00:00
TNC      
TOG   10/02 19:00  
TPCD 10/02 19:00 10/02 19:00 10/02 19:00
TRP   10/02 19:00  
TRX 10/02 15:00 10/02 14:00 10/02 15:00
TSI      
TX1 10/02 19:00 10/02 19:00 10/02 19:00
UDA      
UGS      
UNR      
UTE 10/02 19:00 06/01 01:00  
UTM      
UZB 10/02 19:00 10/02 19:00  
VA1 10/02 19:00 10/02 19:00 10/02 19:00
VG1   01/23 19:24  
VT1 10/02 19:00 10/02 19:00 10/02 19:00
WA1 10/02 19:00 10/02 19:00 10/02 19:00
WES      
WI1 10/02 19:00 10/02 19:00 10/02 19:00
WT1 10/02 19:00    
WV2 10/02 19:00 10/02 19:00  
YER   06/15 07:00