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Air Quality Monitoring

City-Provided Air Quality Monitoring Services (September 2021 – Present)

After five years, South Coast Air Quality Management District (SCAQMD) has completed the most extensive hexavalent chromium air monitoring program in the world and is now turning over routine monitoring to the City of Paramount (click here to see all SCAQMD monitoring results). On September 21, 2021, the City Council unanimously voted to award a contract for air monitoring services to T and B Systems.  T and B Systems’ brings years of experience in providing high-quality air monitoring services.

For the next year, T and B Systems will take air samples on a weekly basis throughout the City to monitor levels of hexavalent chromium. To see the archived results beginning from November 2021, click here. For a running log of current monitoring results in 2023, click here.  Note: The date displayed in the table below only reflects currently active monitors.

It should be noted that the AQMD has stated that concerns would be raised if there are readings above 1.0 over three consecutive samplings, and that any readings below that level are considered as relatively normal “background” levels.

Occasionally, filters may be considered invalid if the sampler operation is found outside of the recommended calibration criteria, there are power outages, rainwater impacts the filter or the filter is damaged.

Most Recent Sampling Data (ng/m3)

Sample Date City Hall 15701 Minnesota Gaines School wdt_ID Lincoln School Vermont Ave
3/13/2023 .306 .501 .116 1 .206 .453

Air Quality Monitor Locations

Monitoring Results & Analysis

Summary of statistics gathered from 11/18/21 – 4/29/22

SiteNumber of SamplesAverage
City Hall270.134
Minnesota & Jackson110.188
Madison & Minnesota220.488
Wesley Gaines Elementary School160.118
Lincoln Elementary School150.118

Notice of Violation (NOV) Issuances

The South Coast Air Quality Management District (SCAQMD) posts Notice of Violations (NOV) on the Compliance & Enforcement page of their websites as violations arise. The notice will list information, including: issue date, NOV number, facility name and address, relevant SCAQMD Rule(s), and specific violation.An NOV can range from a public nuisance to a failure to submit required reports. A “public nuisance” refers to the discharging of such quantities of air contaminants which caused nuisance to a considerable number of persons or to the public.To view enforcement activity of NOVs beginning in the fall of 2016 through the present, please visit the SCAQMD website.

SCAQMD-Provided Air Quality Monitoring Services (Prior to September 2021)

Paramount Emissions Investigation Summary of Efforts April 2021 English
 Paramount Emissions Investigation Summary of Efforts April 2021 Spanish

Looking for historic monitoring data and documents? Please visit our archive page.