ozone · main
37
Good
Baytown Garth
Air Quality
Measured air quality for the Houston metro area, which includes Crosby. The U.S. Air Quality Index (AQI) runs 0–500; the number below is the highest of the reported pollutants, which sets the overall level.
37
Good
Main pollutant: ozone · Baytown Garth monitor · 2026-10-18 18:00 CDT
Measured by the closest reporting Texas Commission on Environmental Quality monitor for each pollutant (per AirNow) in the Houston-Galveston-Brazoria, TX area — the nearest official monitors to Crosby, which has none of its own (PM2.5 — Clinton; ozone — Baytown Garth; PM10 — Clinton). A real reading for the area, not a Crosby-pinpoint value.
PM2.5
16
Good
Clinton
PM10
12
Good
Clinton
Nearby ozone monitori
Channelview C15 is the nearest dedicated ozone monitor to Crosby (about 8.5 mi). It measures ozone only — the headline number above already uses the closest reporting monitor for each pollutant. It's shown here as a cross-check, so a locally elevated ozone reading near the ship channel can't slip past. Hourly, measured by TCEQ via EPA/AirNow.
i
Channelview C15 is the nearest dedicated ozone monitor to Crosby (about 8.5 mi). It measures ozone only — the headline number above already uses the closest reporting monitor for each pollutant. It's shown here as a cross-check, so a locally elevated ozone reading near the ship channel can't slip past. Hourly, measured by TCEQ via EPA/AirNow.
Channelview C15 · ozone
36
Good
Updated Oct 18, 5:00 PM CDT
What this means
Air quality is good — no precautions needed.
How to read the AQI
| AQI | Level | What to do |
|---|---|---|
| 0–50 | Good | Air is clean — enjoy outdoor activity. |
| 51–100 | Moderate | Unusually sensitive people: ease up on hard outdoor exertion. |
| 101–150 | Sensitive groups | Heart/lung conditions, kids, older adults: limit prolonged exertion. |
| 151–200 | Unhealthy | Everyone limits prolonged exertion; sensitive groups avoid it. |
| 201–300 | Very Unhealthy | Avoid outdoor exertion. |
| 301+ | Hazardous | Stay indoors; avoid all outdoor exertion. |
Air quality on the Gulf Coast
Ground-level ozone is the Houston area's signature summer pollutant — it forms on hot, sunny, stagnant afternoons when sunlight cooks emissions from traffic and the ship-channel industry, so ozone AQI usually peaks mid-afternoon and eases overnight. Fine particles (PM2.5) matter year-round and spike with wildfire smoke, Saharan dust in summer, and still winter mornings. When TCEQ calls an Ozone Action Day, sensitive groups should plan outdoor activity for the morning.
- AirNow (EPA) — the EPA's official measured air-quality data — the source behind this page
- TCEQ air monitoring — the Texas agency that runs the monitors
- Pollen & mold — the daily measured pollen and mold count for the Crosby area
- Crosby forecast — how heat and stagnant air drive ozone days