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EMCT SEPA Air Quality Index (AQI) | Air Pollution

Real-time PM2.5, PM10 air pollution level in San Juan

Last Updated: 06 Aug 2025, 03:25am (Local Time)

Live AQI

56(AQI-US)

Air Quality is

Moderate

pm10 : 29 µg/m³

PM2.5 : 12 µg/m³

Good

050

Moderate

100

Poor

150

Unhealthy

200

Severe

300

Hazardous

301+

26 °C

Last Updated: 06 Aug 2025, 03:25am (Local Time)

Map

EMCT SEPA

Major Air Pollutants
EMCT SEPA

Particulate Matter(PM2.5)

12µg/m³

Particulate Matter(PM10)

29µg/m³

Carbon Monoxide(CO)

6ppb

Sulfur Dioxide(SO2)

1ppb

Nitrogen Dioxide(NO2)

7ppb

Ozone(O3)

23ppb

Trending in Puerto Rico

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AQI Graph

Historical Air Quality Data
EMCT SEPA

24 Hours

AQI

EMCT SEPA

AQI

05-08-2025Time06-08-2025

Time	EMCT SEPA
04 AM	54
05 AM	50
06 AM	52
07 AM	53
08 AM	50
09 AM	56
10 AM	56
11 AM	57
12 PM	60
01 PM	59
02 PM	57
03 PM	56
04 PM	53
05 PM	54
06 PM	52
07 PM	51
08 PM	56
09 PM	52
10 PM	50
11 PM	44
12 AM	48
01 AM	66
02 AM	67
03 AM	50

Min.at 11:10 PM on 5th Aug

Max.at 2:10 AM on 6th Aug

Want air quality data?

AQI Trends - Annual Air Quality Changes
EMCT SEPA, San Juan, Puerto Rico, Puerto Rico

AQI

Year

AQI

AQI	AQI
Oct 2022	6
Nov 2022	5
Dec 2022	1
Jan 2023	1
Feb 2023	0
Mar 2023
Apr 2023
May 2023
Jun 2023
Jul 2023
Aug 2023
Sep 2023
Oct 2023
Nov 2023	12
Dec 2023	9
Jan 2024	21
Feb 2024	25
Mar 2024	25
Apr 2024	29
May 2024	63
Jun 2024	34
Jul 2024	42
Aug 2024	39
Sep 2024	29
Oct 2024	22
Nov 2024	28
Dec 2024	34
Jan 2025	32
Feb 2025	33
Mar 2025	36
Apr 2025	37
May 2025	32
Jun 2025	47
Jul 2025	61
Aug 2025	49

Annual AQI Trends

2022

4AQI

2023

5AQI

25%

Rise

2024

35AQI

600%

Rise

2025

40AQI

14%

Rise

Overall Annual Percentage (%) change of AQI in (2022 to 2025)

213%

Rise (Worsened AQI)

Most & Least Polluted Months

Most PollutedMay, 202463AQI

Least PollutedFebruary, 20230AQI

* This data analysis is from year 2022 - 2025

Puerto Rico's Metro Cities
Air Quality Index

Caguas

Catano

Ponce

San Juan

Air Quality Calendar 2025
EMCT SEPA

2025

AQI

January

Sun.	Mon.	Tue.	Wed.	Thu.	Fri.	Sat.
29 Dec -	30 Dec -	31 Dec -	1 Jan 54	2 Jan 40	3 Jan 39	4 Jan 31
5 Jan 31	6 Jan 33	7 Jan 29	8 Jan 32	9 Jan 30	10 Jan 33	11 Jan 30
12 Jan 30	13 Jan 31	14 Jan 29	15 Jan 28	16 Jan 27	17 Jan 33	18 Jan 37
19 Jan 34	20 Jan 32	21 Jan 31	22 Jan 34	23 Jan 28	24 Jan 31	25 Jan 32
26 Jan 30	27 Jan 32	28 Jan 30	29 Jan 29	30 Jan 31	31 Jan 29	1 Feb 29

February

Sun.	Mon.	Tue.	Wed.	Thu.	Fri.	Sat.
26 Jan 30	27 Jan 32	28 Jan 30	29 Jan 29	30 Jan 31	31 Jan 29	1 Feb 29
2 Feb 32	3 Feb 29	4 Feb 30	5 Feb 29	6 Feb 31	7 Feb 32	8 Feb 31
9 Feb 29	10 Feb 30	11 Feb 33	12 Feb 33	13 Feb 34	14 Feb 33	15 Feb 23
16 Feb 33	17 Feb 33	18 Feb 41	19 Feb 39	20 Feb 36	21 Feb 37	22 Feb 32
23 Feb 33	24 Feb 35	25 Feb 29	26 Feb 40	27 Feb 45	28 Feb 40	1 Mar 42

March

Sun.	Mon.	Tue.	Wed.	Thu.	Fri.	Sat.
23 Feb 33	24 Feb 35	25 Feb 29	26 Feb 40	27 Feb 45	28 Feb 40	1 Mar 42
2 Mar 35	3 Mar 36	4 Mar 34	5 Mar 34	6 Mar 31	7 Mar 33	8 Mar 33
9 Mar 28	10 Mar 32	11 Mar 36	12 Mar 33	13 Mar 35	14 Mar 40	15 Mar 38
16 Mar 36	17 Mar 32	18 Mar 37	19 Mar 39	20 Mar 37	21 Mar 41	22 Mar 45
23 Mar 42	24 Mar 40	25 Mar 35	26 Mar 33	27 Mar 34	28 Mar 40	29 Mar 38
30 Mar 35	31 Mar 38	1 Apr 37	2 Apr 39	3 Apr 36	4 Apr 36	5 Apr 35

April

Sun.	Mon.	Tue.	Wed.	Thu.	Fri.	Sat.
30 Mar 35	31 Mar 38	1 Apr 37	2 Apr 39	3 Apr 36	4 Apr 36	5 Apr 35
6 Apr 29	7 Apr 28	8 Apr 37	9 Apr 34	10 Apr 48	11 Apr 50	12 Apr 50
13 Apr 42	14 Apr 41	15 Apr 39	16 Apr 33	17 Apr 40	18 Apr 40	19 Apr 39
20 Apr 38	21 Apr 39	22 Apr 37	23 Apr 34	24 Apr 35	25 Apr 35	26 Apr 36
27 Apr 33	28 Apr 36	29 Apr 34	30 Apr 34	1 May 35	2 May 32	3 May 34

May

Sun.	Mon.	Tue.	Wed.	Thu.	Fri.	Sat.
27 Apr 33	28 Apr 36	29 Apr 34	30 Apr 34	1 May 35	2 May 32	3 May 34
4 May 32	5 May 38	6 May 38	7 May 30	8 May 22	9 May 21	10 May 24
11 May 26	12 May 26	13 May 31	14 May 29	15 May 28	16 May 31	17 May 27
18 May 26	19 May 40	20 May 42	21 May 35	22 May 32	23 May 27	24 May 30
25 May 33	26 May 46	27 May 46	28 May 27	29 May 25	30 May 36	31 May 48

June

Sun.	Mon.	Tue.	Wed.	Thu.	Fri.	Sat.
1 Jun 59	2 Jun 62	3 Jun 44	4 Jun 33	5 Jun 27	6 Jun 29	7 Jun 27
8 Jun 39	9 Jun 52	10 Jun 60	11 Jun 62	12 Jun 53	13 Jun 45	14 Jun 41
15 Jun 38	16 Jun 40	17 Jun 49	18 Jun 52	19 Jun 53	20 Jun 44	21 Jun 43
22 Jun 45	23 Jun 50	24 Jun 52	25 Jun 55	26 Jun 53	27 Jun 50	28 Jun 48
29 Jun 54	30 Jun 55	1 Jul 63	2 Jul 67	3 Jul 90	4 Jul 96	5 Jul 102

July

Sun.	Mon.	Tue.	Wed.	Thu.	Fri.	Sat.
29 Jun 54	30 Jun 55	1 Jul 63	2 Jul 67	3 Jul 90	4 Jul 96	5 Jul 102
6 Jul 101	7 Jul 112	8 Jul 110	9 Jul 93	10 Jul 75	11 Jul 71	12 Jul 62
13 Jul 61	14 Jul 49	15 Jul 39	16 Jul 49	17 Jul 52	18 Jul 44	19 Jul 38
20 Jul 36	21 Jul 39	22 Jul 38	23 Jul 38	24 Jul 45	25 Jul 47	26 Jul 47
27 Jul 46	28 Jul 50	29 Jul 43	30 Jul 45	31 Jul 38	1 Aug 46	2 Aug 54

August

Sun.	Mon.	Tue.	Wed.	Thu.	Fri.	Sat.
27 Jul 46	28 Jul 50	29 Jul 43	30 Jul 45	31 Jul 38	1 Aug 46	2 Aug 54
3 Aug 46	4 Aug 49	5 Aug -	6 Aug -	7 Aug -	8 Aug -	9 Aug -
10 Aug -	11 Aug -	12 Aug -	13 Aug -	14 Aug -	15 Aug -	16 Aug -
17 Aug -	18 Aug -	19 Aug -	20 Aug -	21 Aug -	22 Aug -	23 Aug -
24 Aug -	25 Aug -	26 Aug -	27 Aug -	28 Aug -	29 Aug -	30 Aug -
31 Aug -	1 Sep -	2 Sep -	3 Sep -	4 Sep -	5 Sep -	6 Sep -

Health Advice For People Living In
EMCT SEPA

0Cigarettes per day

Weekly 0 Cigarettes

Monthly 0 Cigarettes

Breathe easy and get active! The air quality is perfect for enjoying outdoor activities.

Source:

Berkeley Earth

Disclaimer: This cigarette-equivalent estimate is based on the average PM2.5 concentration over the last 24 hours, assuming continuous exposure during that time.

Solutions for Current AQI

Air PurifierTurn On
Car FilterMust
N95 MaskMust
Stay IndoorMust

Must turn on the air purifier to enjoy fresh air.

Get an Air Purifier

Prevent Health Problems: Understand Your Risks

EMCT SEPA

Asthma
Heart Issues
Allergies
Sinus
Cold/Flu
Chronic (COPD)

Mild Chances of Asthma

Asthma

Risk of Asthma symptoms is Mild when AQI is Moderate (50-150)

Moderate symptoms including frequent wheezing, noticeable shortness of breath, chest tightness, and persistent cough.

Do's :

Limit outdoor activities when AQI is poor.
Clean indoor air with an air purifier to reduce exposure.
Soothe the respiratory tract with herbal teas or warm water to help alleviate symptoms.

Don'ts :

Exercise outdoors without a mask.
Stay in smoky areas with strong fumes.

Disclaimer: The above health risks are precautionary suggestions based on current AQI levels. You may not feel the effects immediately, but prolonged exposure to air pollution can contribute to these health conditions over time. AQI.IN is neither a medical expert nor a provider of medical advice. Please consult a doctor if you experience any of the above similar symptoms.

Most Polluted Cities 2025
Puerto Rico

Analyze the real-time most air polluted cities in the country.

Most Polluted Cities Live Ranking 2025

World's Most PollutedCity Rankings (2024)

World's Most PollutedCountry Rankings(2024)

RankCityAQIAQI Status

Standard Value

San Juan, Puerto Rico

Ceiba, Puerto Rico

Bayamon, Puerto Rico

Ponce, Puerto Rico

Catano, Puerto Rico

Caguas, Puerto Rico

Catano, Puerto Rico

Arecibo, Puerto Rico

Mayaguez, Puerto Rico

Moderate

4xabove Standard

10.

Trujillo Alto, Puerto Rico

Moderate

3xabove Standard

Last Updated: 06 Aug 2025, 07:30 AM

AQI City Rankings

Air Quality Solutions For EMCT SEPA
Explore the solutions of air quality monitoring & clean air.

Here are some applications that you can go through to find out the solutions.

Air Quality Monitor

Monitor the air quality

Air Quality Sensors

Sensors to measure the air quality

Fresh Air Machine

Clean the air you breathe

Car Cabin Filter

Purify the air in your car

N95 Mask

Shield yourself from pollution

air quality solutions for offices for EMCT SEPA

Air Quality Solution For Offices

A complete solution for air quality monitoring, data analysis, and fresh air solutions in workplaces prioritizing employee's health and productivity.

Air Quality Solutions For Smart City

Prana Air smart city project provides air quality monitors, drones, outdoor air purifiers, and data dashboards solution to improve air quality.

air quality solutions for institutes for EMCT SEPA

Air Quality Solutions for Schools | Institutes

Prana Air provides the air quality solutions for schools by air monitoring & fresh air machine that help the students to breather clean air.

Air Quality Solutions For Hotels

Prana Air air quality solutions are suited for hotel businesses. The occupancy of hotels is the main reasons for bad air quality.

Air Quality Solutions for Restaurants

Prana Air has the air quality solutions for restaurant, cafes, and gives you the power to know what your customers and staff breathe.

Air Quality Solutions for RMC Plants

Prana Air provides air quality monitoring solutions for RMC plants. Improve compliance, protect workers and community, and reduce emissions.

Air Quality Solutions for Fitness Center

Prana Air provides the air quality solutions of pollution monitoring and fresh air for fitness center - gym.

Air Quality Solutions for Parking Lot

A complete solution for air monitoring, data analysis, and fresh air solutions for enclosed car parking areas and car lots.

Air Quality Solutions for Retail Stores

Prana Air provides air quality solutions of pollution monitoring and fresh air for retail stores and shopping outlets.

air quality solutions for airport for EMCT SEPA

Prana Air provides air quality solutions of pollution monitoring and fresh air for retail stores and shopping outlets

Prana Air provides the air quality solutions for airport. Gathering of many passengers is the main reasons of bad air quality in airport.

Air Quality Solutions For Construction Sites

Prana Air offers air quality monitoring solutions for construction sites with data cloud storage, web-dashboard, mobile apps, TV display.

Air Quality Solutions For Hospitals

Prana Air provides air quality monitoring and fresh air solutions for hospitals to ensure clean and healthy indoor air.

air quality solutions for bathroom for EMCT SEPA

Air Quality Solutions For Washroom | Bathroom

Improve washroom and bathroom air quality with Prana Air air quality monitoring devices and fresh air machine. Breathe easy and stay healthy.

Air Quality Solutions for Banks

Prana Air provides air quality solutions of pollution monitoring and fresh air for banks and financial institutions.

Air Quality Solutions for Cinema

Air quality solutions for cinema halls or theatres will help the customers to get the good experience, comfort and breathe clean air.

Air Quality Solutions For Real Estates

Prana Air provides the air quality solutions of pollution monitoring and fresh air for real estates - residential and commercial.

EMCT SEPA's AQI Data Analytics Solutions
Air quality data monitoring platforms

Mobile App

Smart TV App

Web Dashboard

API

Widgets

Mobile App

Empower Your Decisions with Reliable Data

Get it onApp Store

Get it onGoogle Play

Your area’s real-time data with detailed parameters.

Personalized health advice as per current AQI.

Analytical data to identify trends and conditions.

Connect and control your air quality devices.

Air Quality FAQs
at EMCT SEPA

Frequently Asked Questions About Air Quality

What is the current AQI level in EMCT SEPA?

The current real-time AQI level in EMCT SEPA is 56 (Moderate). This was last updated 06 Aug 2025, 03:25am (Local Time).

When was the best AQI level in EMCT SEPA in the last 24 hours?

The best AQI level was 44 (Good) at 11:10 PM, Aug 5, 2025 (Local Time) during the last 24 hours.

When was the worst AQI level in EMCT SEPA in the last 24 hours?

The worst AQI level was 67 (Moderate) at 2:10 AM (Local Time) during the last 24 hours.

What is the current trend of AQI levels in EMCT SEPA during last 24 hours?

The AQI levels in EMCT SEPA have been fluctuating throughout the last 24 hours. The levels have increased by highest 67 at 2:10 AM (Local Time), lowest 44 at 11:10 PM, Aug 5, 2025 (Local Time).

What actions are recommended as per the current AQI level in EMCT SEPA?

Current AQI levels are acceptable; however, some pollutants may be a concern for a small number of sensitive individuals.