# Air Quality Alert: Eastern San Fernando Valley; Eastern San Gabriel Mountains; Interstate 5 Corridor; Los Angeles County San Gabriel Valley; Santa Clarita Valley; Western San Fernando Valley; Western San Gabriel Mountains and Highway 14 Corridor — retained record

> Retained us-gov-api record from us-gov-api:noaa-weather.

Canonical: https://highsignal.app/data/records/c173377f7dcb2e4f

[← sources](https://highsignal.app/data)


source: [us-gov-api](https://highsignal.app/data/us-gov-api) (us-gov-api:noaa-weather)  published 2026-07-30 16:02 ingested 2026-08-01 08:19

[original source ↗](http://www.weather.gov/)

## extract

Air Quality Alert — Eastern San Fernando Valley; Eastern San Gabriel Mountains; Interstate 5 Corridor; Los Angeles County San Gabriel Valley; Santa Clarita Valley; Western San Fernando Valley; Western San Gabriel Mountains and Highway 14 Corridor
Severity: Unknown. Certainty: Unknown.
* WHAT...The South Coast AQMD has issued an air quality alert due to
harmful levels of ozone pollution. Visit
https://www.aqmd.gov/alertinfo to check current and forecasted air
quality levels.

* WHERE...Glendora, San Fernando Valley, Santa Clarita Valley, San
Gabriel Valley, San Bernardino, Redlands, Riverside, Crestline and
the Coachella Valley.. Levels of ozone pollution can vary by time
and location depending on emissions and air pollution transport.

* WHEN...until 8 PM Sunday. The highest ozone levels typically occur
in the afternoon and early-evening hours.

* IMPACTS... Ozone air pollution can cause serious health problems,
including trouble breathing, asthma attacks, and lung damage.
Everyone can be affected, but sensitive groups such as people with
lung disease, older adults, people who are pregnant, children, and
those who spend a lot of time outdoors are at greater risk.

## retained text

The historical document was shared with another weather alert and cannot be attributed to this record. The original extract is preserved above; the exact alert link was not retained.