PM2.5 NAAQS update now implemented (as of May 6th) across the AirNow system

The AirNow Data Management Center has implemented the NAAQS changes across the AirNow system at 6am eastern time on May 6, 2024 – the update impacts all AirNow products including AirNow.gov, the AirNow App, AirNowAPI, EnviroFlash, all map/text products, AirNow-Tech Forecast Submittal System, etc. For more details on this change, please see the EPA's Fact Sheet:
https://www.epa.gov/system/files/documents/2024-02/pm-naaqs-air-quality-index-fact-sheet.pdf

Or the EPA's Final Rule: https://www.federalregister.gov/documents/2024/03/06/2024-02637/reconsideration-of-the-national-ambient-air-quality-standards-for-particulate-matter

If you have any questions please contact us at dmc@airnowtech.org. Thank you,

AirNow Data Management Center

Posted May 6, 2024, 06:11 (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

May 19, 2024 21:27 (ET) (All times are in ET)
Agency Ozone PM2.5 PM10
AB1 05/19 20:00 05/19 20:00 02/25 09:00
AF1   08/15 08:00  
AIR   04/05 17:00  
AKC      
AL1 05/19 20:00 05/19 20:00 04/26 09:00
AL2 05/19 20:00 05/19 20:00 05/19 20:00
AL3      
AL4 05/19 20:00 05/19 20:00 05/19 20:00
ALG   05/19 20:00  
AZ2 05/19 20:00 05/19 20:00 05/19 20:00
AZ3 05/19 20:00 05/19 20:00 05/19 20:00
AZ4 05/19 20:00 05/19 20:00 05/19 20:00
AZE   05/19 20:00  
BAA   03/16 16:00  
BC1 05/19 20:00 05/19 20:00 05/19 20:00
BC2 05/19 20:00 05/19 20:00 05/19 20:00
BFA   05/07 03:00  
BH2   05/19 21:00  
BI1   05/19 20:00  
BIH   05/19 21:00  
BK1      
BLK 05/19 20:00 05/19 20:00 05/19 20:00
BLW 05/19 20:00 05/19 20:00  
BPT 05/19 18:00 05/19 18:00 05/19 18:00
BR1   05/19 20:00  
BZ1   05/19 20:00  
CA0 05/19 20:00 05/19 20:00 05/19 20:00
CA1 05/19 20:00 05/19 20:00 08/27 03:00
CA2 05/19 20:00 05/19 20:00  
CA3 05/19 20:00 05/19 20:00 05/19 20:00
CA4 05/19 20:00 05/19 20:00 05/19 20:00
CA8 05/19 20:00 05/19 20:00 05/19 20:00
CA9 05/19 20:00 05/19 20:00 05/19 20:00
CAT 05/19 21:00 05/19 21:00  
CHD   05/19 20:00  
CHO 11/29 13:00    
CI1   05/19 19:00  
CMB   05/19 20:00  
CN1      
CN2 05/19 20:00    
CN3 05/19 20:00 05/19 19:00 05/21 01:00
CN4      
CO1 05/19 20:00 05/19 20:00 05/19 20:00
CO4      
COG   05/06 02:00  
CRI   09/13 18:00  
CT1 05/19 20:00 05/19 20:00 05/19 20:00
CUR 11/01 02:00 05/19 10:00  
DC1 05/19 20:00 05/19 20:00 09/07 08:00
DE1 05/19 20:00 05/19 20:00  
DN1      
DRN   07/11 09:00  
DUS   05/19 20:00  
EKD   05/19 20:00  
EMU      
EP1      
EPA   08/21 12:00  
FL0      
FL1 05/19 20:00 05/19 20:00 05/19 20:00
FL2 05/19 20:00 05/19 20:00 05/19 20:00
FL3 05/19 20:00 05/19 20:00 05/19 20:00
FL4 05/19 20:00 05/19 20:00 05/19 20:00
FL7      
FS1 05/19 20:00 05/19 21:00 05/19 20:00
GA1 05/19 20:00 05/19 20:00 05/19 20:00
GAB   03/10 02:00  
GBU 05/19 20:00 05/19 20:00 05/19 20:00
GFC      
GH1   05/16 02:00  
GN1   10/31 12:00  
GOL      
GT1 04/25 12:00 05/19 20:00 05/19 20:00
HC1   01/28 19:00  
HI1 05/19 20:00 05/19 20:00 05/19 20:00
IA2 05/19 20:00 05/19 20:00  
IA3 05/19 20:00 05/19 20:00  
IL1 05/19 20:00 05/19 20:00  
JCE      
JDA   05/19 20:00  
JOR 03/06 10:00 03/24 17:00  
JP1 12/30 02:00 12/30 02:00 12/30 02:00
KAZ   05/19 20:00  
KE1   03/08 05:00  
KM1 05/19 21:00 05/19 21:00  
KS1 05/19 20:00 05/19 20:00 05/19 20:00
KY1 05/19 20:00 05/19 20:00  
KY2 05/19 20:00 05/19 20:00 05/19 20:00
KYI   09/17 09:00  
KZ1   05/19 20:00  
LA1 05/19 20:00 05/19 20:00 04/01 00:00
LAO   05/19 20:00  
LC1      
LEM      
LPS      
MA1 05/19 20:00 05/19 20:00 05/19 20:00
MAD   05/19 20:00  
MAP 05/19 20:00 05/19 20:00  
MD1 05/19 20:00 05/19 20:00 05/19 20:00
ME1 05/19 20:00 05/19 20:00 05/19 20:00
MEN 05/19 20:00 05/19 20:00 05/19 20:00
MEX   01/17 14:00  
MGN      
ML1   10/17 08:00  
MM1 05/19 20:00 05/19 20:00  
MMR   05/12 21:00  
MOE      
MON 05/19 20:00 05/19 20:00 05/19 20:00
MS1 05/19 20:00 05/19 20:00 05/19 20:00
MT1 05/19 20:00 05/19 20:00 05/19 20:00
MX2 04/23 06:00 04/23 06:00 04/23 06:00
MY1   05/19 20:00  
NC2 05/19 20:00 05/19 20:00 05/19 20:00
NCA 05/19 20:00 05/19 20:00 05/19 20:00
ND1 05/15 17:00 05/15 17:00 05/15 17:00
NE2 05/19 20:00 05/19 20:00 05/19 20:00
NEA   05/19 21:00  
NH1 05/19 20:00 05/19 20:00 05/19 20:00
NI1   05/19 20:00  
NI2   01/02 04:00  
NJ1 05/19 20:00 05/19 20:00  
NL1 05/19 19:00 05/19 19:00 01/22 13:00
NM2 05/19 20:00 05/19 20:00 05/19 20:00
NOS 05/19 20:00 05/19 20:00  
NPS 05/19 20:00 05/19 20:00  
NRB   12/31 18:26 12/31 18:26
NV2 05/19 20:00 05/19 20:00 05/19 20:00
NV3 05/19 20:00 05/19 20:00 05/19 20:00
OAP 05/19 19:00    
OAQ 05/19 20:00 05/19 20:00 05/19 20:00
OAR      
OCN      
OD1   06/06 13:00  
OH1 05/19 20:00 05/19 20:00 05/19 20:00
OR1 05/19 20:00 05/19 20:00  
OR2 05/19 20:00 05/19 20:00  
OTH      
PA2 05/19 20:00 05/19 20:00 05/19 20:00
PA3 05/19 20:00 05/19 20:00  
PAR   05/19 20:00  
PH1   05/19 20:00  
PIN      
PK1   05/19 20:00  
PK2   05/19 20:00  
PK3   05/18 16:00  
PK4   05/19 20:00  
QA1 09/19 06:00 11/30 03:00  
RI1 05/19 20:00 05/19 20:00  
RIY   12/30 04:00  
RT9      
RWA   05/13 19:00  
SC1 05/19 20:00 05/19 20:00 05/19 20:00
SCS      
SEN   04/22 19:00  
SFN 03/05 07:00    
SHA 05/19 20:00 05/19 20:00  
SIC      
SK1 05/19 20:00 05/19 20:00  
SLO 05/19 20:00 05/19 20:00 05/19 20:00
SMA 02/04 05:00 02/04 05:00 08/07 09:00
SMJ 05/17 14:00 05/17 14:00 05/17 14:00
SMS      
SR1 05/19 20:00   05/19 20:00
SU1   05/04 14:00  
SY1   05/08 01:00  
TEL      
THM 05/19 20:00 05/19 20:00 05/19 20:00
TMA      
TN1 05/19 20:00 05/19 20:00  
TN2 05/19 19:00 05/17 11:00 12/31 23:00
TN3 05/19 19:00 05/19 19:00 01/01 00:00
TNC      
TOG   05/19 20:00  
TPCD 05/19 19:00 05/19 19:00 05/19 19:00
TRP   05/19 19:00  
TRX 05/19 20:00 05/19 18:00 05/19 20:00
TSI      
TX1 05/19 20:00 05/19 20:00 05/19 20:00
UDA      
UGS      
UNR      
UTE 05/19 20:00 06/01 01:00  
UTM      
UZB 05/19 20:00 05/19 20:00  
VA1 05/19 20:00 05/19 20:00 05/19 20:00
VG1   01/23 19:24  
VT1 05/19 20:00 05/19 20:00 05/19 20:00
WA1 05/19 20:00 05/19 20:00 05/19 20:00
WES      
WI1 05/19 20:00 05/19 20:00 05/19 20:00
WT1 05/19 20:00    
WV2 05/19 20:00 05/19 20:00  
YER   06/15 07:00