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Redwood City Carbon Monoxide (CO) Level

North Fair Oaks, California, United States

Carbon Monoxide (CO)

178ppb

Good

Last Updated: 2026-07-17 07:11:01 (Local Time)

Map

Redwood City

Good

08330

Moderate

16670

Poor

25000

Unhealthy

33330

Severe

41670

Hazardous

50000+

What is the Current CO Level?
Redwood City

The current CO level at Redwood City is 178 ppb making it healthy and safe for everyone in the area.

19.6xBelow

The current CO level in Redwood City is 19.6x Below the recommended WHO guideline of 3490 ppb.

AQI Graph

Historic Air Quality Graph of Carbon Monoxide (CO)
Redwood City

24 Hours

Redwood City

CO (ppb)

16-07-2026Time17-07-2026

Time	Redwood City
7:31am	207
8:01am	179
8:31am	207
9:01am	280
9:31am	194
10:01am	196
10:31am	178
11:01am	171
11:31am	174
12:01pm	187
12:31pm	200
1:01pm	187
1:31pm	184
2:01pm	182
2:31pm	186
3:01pm	185
3:31pm	184
4:01pm	207
4:31pm	201
5:01pm	196
5:31pm	190
6:01pm	189
6:31pm	199
7:01pm	187
7:31pm	183
8:01pm	194
8:31pm	191
9:01pm	293
9:31pm	302
10:01pm	301
10:31pm	174
11:01pm	176
11:31pm	203
12:01am	190
12:31am	181
1:01am	178
1:31am	181
2:01am	201
2:31am	199
3:01am	176
3:31am	191
4:01am	203
4:31am	174
5:01am	206
5:31am	172
6:01am	182
6:31am	186
7:01am	197

171

Min. CO11:01am

302

Max. CO9:31pm

Want air quality data?

Do you know CO emissions in the atmosphere can affect the greenhouse gas level? It is because CO emission causes global and climate changes in the atmosphere by increasing or changing the sea and land temperatures. It makes changes in ecosystems and storm activity and affects other weather events..

Uncovering the Sources of Carbon Monoxide (CO): Where Does It Come From?

Biomass burning

Burning wood, crop residues, and organic materials.

Power plants

Emissions from burning fossil fuels in power plants.

Fireplaces

Emissions from burning wood or coal in fireplaces.

Road traffic

Overall contributions from vehicles exhaust.

Vehicles engines

Exhaust emissions from cars and trucks.

Short-Term CO Exposure Impacts

Fatigue

Feeling tiredness or lack of energy.

Chest pain

Discomfort or pain in the chest area.

Confusion

Frequent difficulty in thinking clearly.

Flu-like symptoms

Symptoms like headache and nausea.

Weakness

Frequent weakness or lack of strength.

Why you should care about Carbon Monoxide (CO)?

Know More About CO Sensor

Air Quality FAQs
at Redwood City

Frequently Asked Questions About Air Quality

1. What is the current CO level in Redwood City?

The current real-time CO level in Redwood City is 178ppb (Good). This was last updated 2026-07-17 07:11:01 (Local Time).

2. When was the best CO level in Redwood City in the last 24 hours?

The best CO level was 171 ppb (Good) at 11:01 AM, Jul 16, 2026 (Local Time) during the last 24 hours.

3. When was the worst CO level in Redwood City in the last 24 hours?

The worst CO level was 302 ppb (Good) at 9:31 PM, Jul 16, 2026 (Local Time) during the last 24 hours.

4. What is the current trend of CO levels in Redwood City during last 24 hours?

The CO levels in Redwood City have been fluctuating throughout the last 24 hours. The levels have increased by highest 302 ppb at 9:31 PM, Jul 16, 2026 (Local Time), lowest 171 ppb at 11:01 AM, Jul 16, 2026 (Local Time).

5. What actions are recommended as per the current CO level in Redwood City?

The air quality is satisfactory, and air pollution poses little or no risk. No special precautions are needed; enjoy outdoor activities freely.