New Mexico
Thousands warned to stay indoors in Arizona, New Mexico, Texas
Thousands of residents in communities across Arizona (including the Nogales area), New Mexico (including Juárez), and Texas (including El Paso) have been advised to stay inside as fine particles of pollution (PM2.5) reached “unhealthy” levels, as of 3.15 a.m. ET on January 19, 2026.
This information comes from the Environmental Protection Agency’s (EPA) AirNow Map, which uses the Air Quality Index (AQI)—a standardized scale that measures and communicates air quality across the U.S. by categorizing conditions into six levels, from “Good,” “Moderate,” and “Unhealthy for Sensitive Groups” to “Unhealthy” “Very Unhealthy,” and “Hazardous.”
Why It Matters
The EPA considers PM2.5 to be one of the most dangerous forms of air pollution. This is because the particles are so small—each one is less than 2.5 micrometers in size, which is far thinner than a single strand of hair. When PM2.5 levels reach an “unhealthy” range, these particles can be easily inhaled, traveling deep into the lungs and, in some cases, entering the bloodstream. This can trigger irritation of the eyes, nose, throat, and lungs, as well as more serious effects such as chest tightness and shortness of breath.
“Unhealthy” levels of PM2.5 pose the greatest risk to sensitive groups, including older adults, children, and people with existing respiratory or cardiovascular conditions. Individuals with asthma, COPD, or heart disease are particularly vulnerable because elevated particle levels can worsen their underlying conditions and may even lead to hospitalization.
As a result, the EPA advises those in sensitive groups to avoid prolonged or intense outdoor activities. Everyone else is encouraged to reduce the duration or intensity of outdoor exertion until air quality improves.
Although residents in affected areas should avoid or reduce long or intense outdoor activity when PM2.5 reaches “unhealthy” levels, poor air quality can also affect the air inside homes. Because indoor particle levels can rise when outdoor pollution is high, the EPA and health agencies advise avoiding activities that generate additional indoor pollution—such as burning candles, using woodstoves, or lighting indoor fires. They also recommend using air purifiers or high‑efficiency filters to keep indoor air as clean as possible
What Causes ‘Unhealthy’ Levels of PM2.5?
The EPA has not established what is causing “unhealthy” levels of PM2.5 across Arizona, New Mexico, and Texas. However, PM2.5 can come from a variety of sources, including dust from unpaved roads and construction sites, smoke from fires or smokestacks, or emissions released from vehicles or power and industrial sites.
New Mexico
Los Alamos Public Schools Students Compete At 2026 New Mexico State Science & Engineering Fair
Students from Barranca Mesa Elementary, Mountain Elementary, Los Alamos Middle School, and Los Alamos High School at the 2026 New Mexico State Science & Engineering Fair at New Mexico Tech. Photo CourtesyLAPS
LAHS junior Tate Plohr and freshman Linus Plohr qualified to attend the 2026 Regeneron International Science and Engineering Fair in May in Phoenix, Ariz. Photo Courtesy LAPS
Los Alamos Middle School student Branden Keller was awarded the CO2 & Greenhouse Gas Scholarship in the amount of $2,000 at the 2026 New Mexico State Science & Engineering Fair. Photo Courtesy/LAPS
LAPS NEWS RELEASE
Twenty students from Barranca Mesa Elementary, Mountain Elementary, Los Alamos Middle School (LAMS) and Los Alamos High School (LAHS) competed, with several garnering awards at the 2026 New Mexico State Science and Engineering Fair held at New Mexico Tech in Socorro.
LAHS junior Tate Plohr qualified to attend the Regeneron International Science and Engineering Fair (ISEF) next month in Phoenix, Ariz. He was awarded the 3rd-place Grand Award. Freshman Linus Plohr qualified as an alternate and will also be attending the Regeneron ISEF.
Students who participated in the state competition include, from Barranca Mesa Elementary, Sydney Chen, Mary Beth Kelsey, Lily Neale, Aurora Roberts Voss and Henry Rodarte; and Glyn Lo and Ernest Maupin, Mountain Elementary.
Students from LAMS who competed include Evelyn Fobes, Mason Garcia, Andrew Gilbertson, James Junghans, Sequoya Ke, Brandon Keller, Nejan Liyanage and Daniel Yampolsky.
LAHS students Julia Neale, Linus Plohr, Tate Plohr, Lilia Veteva, Helena Welch and Kalliope Welch competed at the senior level.
2026 Award winners:
Category Awards – Junior Division
- Animal Science, Cellular & Molecular
- Biomedical & Health Science
- Honorable Mention: Sequoya Ke
- Embedded Systems, Math, Robotics, Software & Technology
- 2nd place: Nejan Liyanage
- Physics & Astronomy
- 1st place: Sydney Chen
- 2nd place: Mason Garcia
- Honorable Mention: Marybeth Kelsey
- Plant Science
Category Awards – Senior Division
- Behavioral & Social Science:
- Honorable Mention: Linus Plohr
- Earth & Environmental
- Honorable Mention: Lilia Viteva
- Embedded Systems, Math, Robotics, & System Software
- 3rd Place: Helena Welch and Kalliope Welch
- Physics & Astronomy
Grand Awards
- ISEF finalist 3rd place: Tate Plohr
- Brandon Keller received the CO2 & Greenhouse Gas Scholarship in the amount of $2,000. James Jungans and Marybeth Kelsey garnered Thermo Fisher Awards.
Other special award winners include:
- CO2 & Greenhouse Reduction Awards (Junior Division)
- Daniel Yampolsky, 2nd place, Earth & Environmental Sciences
- Sequoya Ke, 1st place, Biomedical & Health Science
- Brandon Keller, 1st place, Energy & Materials Science
- Andrew Gilbertson, 1st place, Physics & Astronomy
- CO2 & Greenhouse Gas Reduction Award (Senior Division)
- Lilia Viteva, 1st place, Earth & Environmental Sciences
- Office of Naval Research Award
- David Shortess Award
- New Mexico AVS Award
- Citadel Award
- Naval Research Award
- NM Network for Women in Science & Engineering Award
- Yale Science & Engineering Award
- Rose Baca Rivet Award
Related
Arizona State baseball will host a four-game homestand, beginning with New Mexico State on Wednesday, April 22.
The Sun Devils and Aggies faced each other in late March, with ASU winning 10-4. The two teams will meet for the final time at 6:35 p.m. at Phoenix Municipal Stadium.
ASU will then welcome Baylor on Friday, April 24, for a three-game series. The Sun Devils have yet to face the Bears this season, but ASU has been doing well so far and has been in the top 25 for four weeks.
Sophomore center fielder Landon Hairston earned Big 12 player of the week honors on April 13, after delivering five home runs in five games. His 10 runs in that stretch were tied for the second-most nationally and his 14 runs batted in were tied for third-most nationally. All nine of his hits went for extra bases, three more than any other player.
ASU’s series against Baylor will start at 6:35 p.m. for the first two games, followed by a 1:05 p.m. start on Sunday, April 26.
April 19
Softball at Houston, Cougar Softball Stadium, noon.
April 22
Baseball vs New Mexico State, Phoenix Municipal Stadium, 6:35 p.m.
April 23
Women’s golf at Big 12 Championship, Dallas Athletic Club, TBA.
Track and field at Penn Relays, Franklin Field, 1:22 p.m.
Beach volleyball at Big 12 Championship, Bear Down Beach, all day.
April 24
Baseball vs Baylor, Phoenix Municipal Stadium, 6:35 p.m.
Softball vs Texas Tech, Farrington Stadium, 7 p.m.
April 25
Lacrosse at Colorado, Prentup Field, 11 a.m.
Softball vs Texas Tech, Farrington Stadium, 3 p.m.
Baseball vs Baylor, Phoenix Municipal Stadium, 6:35 p.m.
Reach the reporter or send tips for stories at jenna.ortiz@arizonarepublic.com, as well as @jennarortiz on X.
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Josh’s Saturday Night Forecast
NEW MEXICO (KRQE) – Calmer weather has moved back into the state this afternoon. Temperatures are slightly warmer across northwestern New Mexico, while southeastern areas are cooler thanks to the backdoor cold fronts that moved in on Friday. Breezier winds will return Sunday and will help kick off a warming trend across the state, along with an elevated fire threat in eastern New Mexico.
Warmer weather will continue building in across the state throughout the upcoming week. A few isolated rain chances will return Monday in parts of New Mexico, but some of that rain may evaporate before reaching the ground.
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