Why does Baytown smell?

Because it's a refinery town on a bay, and both of those have a smell. Here's what you're smelling and when it matters.

Sulfur on a south wind

The refinery. Hydrogen sulfide and the sulfur compounds that come off crude processing have a rotten-egg note you catch on a south or southwest wind, especially at night when the air sits. It's the most common Baytown smell, it's been here a hundred years, and at the levels that drift over town it's an annoyance rather than a hazard. When it's strong enough to sting, that's a different day — see below.

Something sweet or sharp

The chemical side — the olefins and aromatics units, the plastics plants at Cedar Bayou, the Mont Belvieu fractionators when the wind is east. Benzene-family compounds smell sweet; some of the others are sharp or like nail polish. Occasional, usually brief, usually a startup or a release the company will post about within the day and report to the state.

Rotten eggs that aren't the refinery

Natural gas is odorized to smell like rotten eggs on purpose. If the smell is strong, close to the ground, and near a meter or a stove, that's a gas leak, not the plants: get out, don't flip switches, call the gas company's leak line from outside. The emergency page has the number.

The bay

Low tide on a hot day, a fish kill after a cold snap, the marsh doing what marshes do. Salt, mud, decay. That's not the plants; that's the Gulf Coast, and Galveston smells the same.

The flare

Big flares put out a burnt note along with the light. Loud, bright, smoky sometimes, almost always a safety burn-off rather than an emergency. The "What was that?" page has the whole explanation.

When it matters

If your eyes water, your throat burns, or you feel dizzy: go inside, close the windows, turn off the AC, and call the CAER line at 281-476-2237 — the complaints are logged and they count toward what the state does next. Check Baytown Alert and the county's air monitors, which post readings from the fenceline. A shelter-in-place order comes by siren and text; follow it. Asthma and COPD households should know the wind direction the way other people know the weather, and keep the rescue inhaler by the door.

Does it affect health?

The honest answer is that this is a real, studied question and the answer depends on where you live and for how long; the county and the state monitor, the plants report, and the numbers are public. We link the monitors and the state's release database rather than summarizing them, because a summary would be someone's opinion. Talk to the pediatricians here; they've seen the whole picture, and they'll tell you what the numbers mean for your street.

The good news

Most days, especially in fall and winter with the wind off the land, Baytown smells like nothing at all, and the Nature Center at dawn smells like salt and marsh grass. The smell is the price of the plants, and the town decided a century ago it was worth it. Newcomers stop noticing in a month; the visitors who don't are the ones we wrote this for.

En español

¿Por qué huele Baytown? Azufre con viento del sur: la refinería, huele a huevo podrido, cien años igual, molesto pero no peligroso a los niveles que llegan a la ciudad. Algo dulce o picante: el lado químico. Huevo podrido cerca del medidor o la estufa: eso es una fuga de gas, no las plantas — salga y llame desde afuera. Lodo y sal: la bahía en marea baja. Si le arden los ojos o la garganta: entre, cierre ventanas, apague el aire, y llame a la línea CAER, 281-476-2237. Los monitores de aire del condado publican las lecturas. La mayoría de los días, especialmente en otoño e invierno, no huele a nada.