Norwalk, Iowa Air Quality

An Air Quality Alert is issued by the National Weather Service on behalf of a state or local agency when pollution is expected to reach a level that harms health. An Air Stagnation Advisory means the air will not move enough to clear what is already in it.

None are in force near Norwalk right now. All Iowa warnings.

Good

Nearest monitor

CARPENTER, 9 miles away (site 191530030)

Index measured

15 · Good

Measured at

Mon, 11:00 PM CDT

Fine particles

1.5 µg/m³

Ozone

18 ppb

Reporting area

Des Moines, IA, 4 miles away

Reported by

Polk Co. Air Quality Division

Area index

15 · Good

Measured, not modeled. AirNow observations are preliminary until the operating agency certifies them, which happens months later.

Polk Co. Air Quality Division's own forecast for Des Moines, written by a forecaster rather than read off a model.

NOAA’s air quality model could not be read for this point just now. It runs twice a day and covers the lower 48, Alaska and Hawaii.

NOAA’s analysts have not drawn smoke over Norwalk in satellite imagery today.

NOAA’s model forecasts no measurable smoke near the ground here over the next two days.

Smoke on the radar over Norwalk

Good

Air quality is satisfactory, and air pollution poses little or no risk.

Who is affected

Nobody is expected to be affected.

What to do

It is a good day to be outside.

Index range

0 to 50

Category descriptions are the Environmental Protection Agency’s own.

What these numbers are. An index beside a monitor’s name is a measurement, published hourly by AirNow and preliminary until the operating agency certifies it. A category for today or tomorrow is a state or local agency forecaster’s own forecast for a reporting area. An hourly index is NOAA’s air quality model on a five-kilometer grid, not a reading from any instrument. Where a town has no monitor within reach, only the model figures appear, and the page says so.

The nearest towns with a page of their own, closest first.

• West Des Moines, IA7 miles
• Windsor Heights, IA9 miles
• Clive, IA9 miles
• Des Moines, IA9 miles
• Carlisle, IA10 miles
• Indianola, IA10 miles
• Urbandale, IA11 miles
• Pleasant Hill, IA11 miles

Observations and daily forecasts from AirNow, the US Environmental Protection Agency’s program with NOAA, the National Park Service, NASA, tribal, state and local agencies. Hourly forecasts from NOAA’s National Air Quality Forecast Capability. Smoke analysis from NOAA’s Hazard Mapping System. Alerts from the National Weather Service. Index categories and breakpoints are EPA’s, as revised in 2024.