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Guam Nonattainment/Maintenance Status for Each County by Year for All Criteria Pollutants
Data is current as of January 31, 2025Listed by County, NAAQS, Area. The 8-hour Ozone (1997) standard was revoked on April 6, 2015 and the 1-hour Ozone (1979) standard was revoked on June 15, 2005.
* The 1997 Primary Annual PM-2.5 NAAQS (level of 15 µg/m3) is revoked in attainment and maintenance areas for that NAAQS. For additional information see the PM-2.5 NAAQS SIP Requirements Final Rule, effective October 24, 2016. (81 FR 58009) Important Notes Download National Dataset: dbf | xls | Data dictionary (PDF)
County | NAAQS | Area Name | Nonattainment in Year | Redesignation to Maintenance |
Classification | Whole or/ Part County |
Population (2010) |
State/ County FIPS Codes | ||||||||||||||||||||||||||||||||||
GUAM | ||||||||||||||||||||||||||||||||||||||||||
Guam | Sulfur Dioxide (1971) | Piti, GU |
| / / | Part | 1,000 | 66/010 | |||||||||||||||||||||||||||||||||||
Guam | Sulfur Dioxide (1971) | Tanguisson, GU |
| / / | Part | 1,000 | 66/010 | |||||||||||||||||||||||||||||||||||
Guam | Sulfur Dioxide (2010) | Piti-Cabras, GU |
| / / | Part | 6,116 | 66/010 |
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