Public Lab Wiki documentation

Revisions for sandbox-air-quality

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More community projects and projects

  • Remembering Tonawanda: Public Lab blog post by @kgradow1 and @jjcreedon on the incredible organizing and community science for cleaner air in Tonawanda, New York.
  • South Durban Community Environmental Alliance (SDCEA): on this page, you’ll find videos of Desmond D'sa describing how SDCEA’s community organizing around bucket air monitors gave rise to new air quality legislation in South Africa.
  • Community Observation Networks for Air (CONA): out of New Zealand, @guolivar is building and using lower-cost air sensors to monitor local air quality and engage communities in air quality research.
  • Modeling Environmental Health Impacts of I-10 to Engage Residents and Decision Makers: out of New Orleans, Louisiana, this project with the Thriving Earth Exchange included air monitoring with low-cost sensors to connect environmental data and health impacts near the high-traffic I-10 corridor.
  • Breathe Project: brings together people who work on and are impacted by air pollution to research and map air quality in Allegheny County, Pennsylvania, and beyond.
  • Imperial IVAN: out of Imperial Valley, California, this community-based monitoring network and its successful organizing were the model for state legislation aiming to reduce air pollution in the most impacted communities.

Latest community stories

Join the conversation

Questions from the community

  • See if other community members are asking questions like yours
  • Ask a question so other community members can offer support
  • Sign up below to be notified when someone asks an air quality question


Post an Issue Brief

Share a local concern or issue about air quality and get support from the Public Lab community by writing and posting an Issue Brief. Visit “Write an Issue Brief” to find information on what an issue brief is, see examples, and learn how to write one.

Research air quality

Planning and carrying out a community air quality study can seem daunting. Be reassured that many other community groups have planned and done air quality studies, and that the Public Lab community is here to support you. At any time, you can ask questions, start an issue brief with any amount of information you have, or start documenting your project, and gather input from other Public Lab members.

Getting ready

Here are some resources that might help you get started with a community air monitoring project.

Posts about gathering with community


See how other communities have investigated their local air

Many community groups have studied local air quality in their neighborhoods and shared their extensive knowledge and experiences in publicly-available written guides. @kgradow1 has compiled a handy short list of community air guides here, and explained the advantages and limitations of each guide. Much of the more general guidance on this page was collected from these community air guides.

A particularly comprehensive how-to guide is the Guidebook for Developing a Community Air Monitoring Network: Steps, Lessons, and Recommendations from the Imperial County Community Air Monitoring Project. It covers community engagement, choosing tools and software, determining monitoring sites, and analyzing data.

Deciding what to monitor

What pollutants might be in the air near you?

Considering common sources of air pollutants can help you determine which pollutants might be in your community.

General sources: the buttons below list some examples of human activities, industries, and natural sources. Click the buttons to see common air pollutants these sources use or produce.

Oil and gas production, refining, storage; oil- and coal-fired power plants
  • Volatile organic compounds (VOCs); “BTEX” VOCs benzene, toluene, ethylbenzene, and xylene, especially associated with natural gas; formaldehyde associated with natural gas compressor stations
  • Methane
  • Sulfur compounds
  • Nitrogen oxides (NOx)
  • Particulate matter (PM)
  • Polycyclic aromatic hydrocarbons (PAHs)

Chemical manufacturing, commercial manufacturing, petrochemical plants
  • Volatile organic compounds (VOCs), especially ethylene oxide, benzene, formaldehyde
  • Nitrogen oxides (NOx)
  • Polycyclic aromatic hydrocarbons (PAHs)

  • Dust / particulate matter
  • Polycyclic aromatic hydrocarbons (PAHs)

Exhaust from gas-powered motor vehicles; municipal waste sites
  • Particulate matter
  • Volatile organic compounds (VOCs), especially ethylene, propylene, and acetylene
  • Nitrogen oxides
  • Sulfur dioxide
  • Carbon monoxide
  • Methane

  • Ammonia
  • Hydrogen sulfide
  • Nitrogen oxides

  • Wildfires: fine particulate matter (PM2.5)
  • Volcanic activity: sulfur dioxide and particulate matter, making volcanic smog (“vog”)

Sources near you: the activities listed below can help you learn about searching public databases to find out what industries and emissions sources are near you.


After you narrow down your pollutants of interest, you can read more about them and the range of methods to investigate the pollution below in the "Air pollutants and monitoring methods" section.

How can air pollutants impact your health?

You might choose a specific pollutant to monitor because you know it’s in your local air and you’re experiencing health impacts.

ToxFAQs by the Agency for Toxic Substances and Disease Registry (ATSDR) in the US contains a large alphabetical list of compounds, how you might be exposed to each, and their potential health impacts.

Toxic City: Health Impacts of Chemicals Emitted in the South Durban Area: this guide by the South Durban Community Environmental Alliance (SDCEA) refers to specific companies in the South Durban area of South Africa, but the industry types, emissions, and health impacts can be applicable to anywhere.

If there aren’t specific pollutants you’re looking for and you’re more interested in detecting what’s in the air, you can do broad spectrum sampling.

What are your study goals?

Determining what you ultimately want to do with air quality data will help guide the approach you take and what kind of data will best answer your questions.

Some example goals:

  • Create community awareness of an air quality issue
  • Identify pollution hotspots for more monitoring
  • Share information on an air quality issue with media
  • Submit data to a regulatory agency

In general, using data for regulatory or legal purposes will require certain methods to collect the data and meeting set data quality standards.

Posts about planning an environmental study

Air pollutants and monitoring methods

Based on your initial observations and research on what sources of air pollution are near you, you have an idea of which air pollutants you want to investigate. What methods are available to study them?

You might be able to use existing public databases to meet your study goals, or you might decide to collect your own air monitoring data. Below are resources for gathering your own data on air quality.

Overview of common approaches

odor log

Image from Odor Log 1.0

smoke school

Image from Smoke School

dust sensor
  • Detect pollutants continuously, outputs in real-time
  • Various ways to detect different pollutants: metal oxide sensors, electrochemical, light-scattering/optical
  • Some sensors can detect both gases and particulate matter, others have more specificity
  • Trade-offs with real-time monitoring and data collected
  • Recent posts on air sensors

Image from @warren

grab sampler

Image from @kgradow1

For another way to view different air monitoring approaches, check out the box entitled, “What other kinds of community air monitoring are there?” on pg. 12 of the Guidebook for Developing a Community Air Monitoring Network. It outlines different approaches that vary in mobility and timeframes, including fenceline monitoring, grab sampling, personal monitoring, and mobile monitoring.


Air polluting gases and monitoring methods: on this wiki page we describe some main approaches to monitor gas-phase air pollutants, and then list common outdoor gaseous pollutants (e.g., volatile organic compounds (VOCs), nitrogen oxides, ground-level ozone, carbon monoxide, and hydrogen sulfide) and examples of tools to detect and measure them. Visit and edit the page to help grow this resource!

bucket monitor

One of the tools listed for sampling gas-phase air pollutants that has a storied history in community campaigns is the Bucket Monitor. On the linked wiki page, you’ll find information on how people have been using the bucket monitor to advocate for change, plus updated resources on building and using a bucket monitor. You can also find a kit to build your own bucket monitor in the Public Lab store.

Particulate matter (PM)

Introduction to Particulate Matter: find community questions and research notes about particulate matter, plus a deep dive into different kinds and sizes of PM.

Collecting data on particulate matter: kicks off with key resources on strategizing your monitoring efforts to match with your community goals, then describes different monitoring methods including regulatory methods and Smoke School for communities.

Choosing a method for Particulate Matter Monitoring: goes deeper into different PM monitoring approaches (visual, filter-based, optical, passive) to help you choose the method right for you. For each approach, it describes advantages and disadvantages, when it might be useful, and example tools.

simple air sensorsimple air sensor lights

One of the more accessible tools for monitoring PM that also helps you understand how some sensors work is the Simple Air Sensor. Developed by Public Lab, it’s an open-source, optical sensor-based tool that signals changing PM levels in your air with a colored LED light.

Tools for mapping and viewing data

Air quality subtopics

A collection of wiki pages on monitoring methods and approaches covering particulate matter and gases



Activities on Public Lab that have been tagged with air-quality will appear here


Regulations, policy, and advocacy

Regulations and policy

US Environmental Protection Agency standards and regulations

National Ambient Air Quality Standards (NAAQS)

What are the standards?

Section 109 of the Clean Air Act directs the EPA to establish National Ambient Air Quality Standards (NAAQS) requisite to protect public health with an adequate margin of safety (primary standard) and for the protection of public welfare (secondary standard).

The standards are for six common pollutants, referred to as criteria air pollutants: ground-level ozone, particulate matter, nitrogen dioxide, sulfur dioxide, carbon monoxide, and lead.

Section 109(d)(1) of the Clean Air Act requires EPA to complete a thorough review of the NAAQS at 5-year intervals and enact new standards when appropriate.

The standard levels are listed in the summary table below and can also be found here.


How are the air quality standards enforced?

States and tribes use air monitoring data and models on the criteria pollutants to evaluate whether they meet the NAAQs. They send their evaluation information to the EPA, which then designates an area as attainment or nonattainment for the pollutant standard. Nonattainment areas must create and carry out a plan for attaining standards by reducing emissions.

Complete details of the standards, measurement principles, and data interpretation, can be found in Title 40 of the Code of Federal Regulations Part 50.

EPA Test Methods

EPA approved instruments are designated as either a Federal Reference Method (FRM) or Federal Equivalent Methods (FEM). The complete list of approved instruments for evaluating NAAQS is provided on the EPA Ambient Monitoring Technology Information Center (AMTIC) website.

Hazardous air pollutants / air toxics

In addition to the six criteria air pollutants, the Clean Air Act requires the EPA to regulate 187 hazardous air pollutants (also known as air toxics). These pollutants can cause serious health effects, such as cancer, even at low levels.

State and local regulations

Example Air Pollution Regulations in Wisconsin

Air pollution which is defined as the presence of smoke, dust, gases, fumes in the air. The presence of these substances must also lead to injury on humans, animals or plants as well as interfere with the enjoyment of life or one's property. NR 400.02
Fugitive dust. This refers to the presence in the air of dust from sources such as open fields and piles. There will be a violation on air quality when during handling, transporting and storing of materials, the people undertaking these activities do not take precaution and some of these materials end up being released into the air. NR 415.04
Causing, allowing or permitting solid or liquid hazardous substances into the air. This includes dust, soot, pollen, smoke and liquid droplets. One can spot that violation by simply observing the ambient air. NR. 415.05
Industrial sand mines that do not take precautions to ensure dust does not escape into the air. NR 415.075

Community Air Protection Program - California AB 617: addressing inequities in air quality and monitoring, California is implementing the Community Air Protection Program to “...reduce exposure in communities most impacted by air pollution.”

International regulations

Other resources for air quality standards

  • The US Center for Disease Control (CDC) and its National Institute for Occupational Safety and Health (NIOSH) also offer a wealth of guidance. In particular, the NIOSH Manual of Analytical Methods is a collection of procedures for sampling and analysis of contaminants including workplace air.
  • The Agency for Toxic Substances and Disease Registry (ATSDR), based in Atlanta, Georgia, is a federal public health agency of the U.S. Department of Health and Human Services. Their Toxicological Profiles are particularly useful for when a pollutant can be identified by compound or element.
  • Correlating environmental monitoring with health monitoring: the article, “New Voices, New Approaches: Drowning in Data,” by Gwen Ottinger and Rachel Zurer outlines some of the limitations with relying on air quality standards alone.

Community posts and pages on air quality regulations


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