PurpleAir PA-II-SD Quick Start Guide Presentation
Description: PurpleAir PA-II-SD Quick Start Guide Presentation This guide is compatible with the PurpleAir PA-II-SD sensor. Screenshots of the PurpleAir and AirNow Fire and Smoke Maps were captured in July 2021. Discussion of SD card data format may be
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slide1. PurpleAir PA-II-SD Quick Start Guide Presentation This guide is compatible with the PurpleAir PA-II-SD sensor. Screenshots of the PurpleAir and AirNow Fire and Smoke Maps were captured in July 2021. Discussion of SD card data format may be specific to firmware version 6.11. Version: March 2024 A. L. Clements, R. M. Duvall, “PurpleAir Quick Start Guide Presentation”, Edited by D. Hollowed on 3/20/2024. Air Sensor Loan Programs, Funded by U.S. EPA. 2021<br>
slide2. Quick Start Guide Overview Page 2 General Safety Precautions and Tips
General Information about the PurpleAir Sensor
Step 1: Connect the PurpleAir Sensor to WiFi
Step 2: Register the PurpleAir Sensor
Step 3: Install the PurpleAir Sensor
Step 4: View Maps and Verify Sensor Operation
Troubleshooting Tips
Additional Information and Resources<br>
slide3. Safety Precautions and Tips Page 3 Minors should be supervised by a guardian when accessing the internet to register the sensor Be sure descriptive PurpleAir sensor names and location are appropriate!
If public, it will be online and visible to the entire PurpleAir community Use caution if climbing ladders or stepstools to install the sensors.
Take care to avoid tripping on the power cord Do not cover the sensor air inlet or exit The PurpleAir sensor is water resistant, not waterproof – make sure to mount the sensor with the cap up and high enough so that water cannot splash up and into the sensor Loop the power cord to create a drip loop to prevent water from running down the cord and into the power outlet Additional Important Notes:
The PurpleAir only measures particulate matter – it does not measure gaseous pollutants.
The PurpleAir does not measure airborne viruses like the flu or COVID-19.<br>
slide4. About PurpleAir PurpleAir Data Hardware
2 Plantower PMS5003 PM sensor (channels A & B)
BME280 pressure, temperature, humidity sensor
Sample for alternating 10-second intervals
Generate 2-minute averages
PurpleAir Data Outputs
Reports estimated particulate matter concentrations (PM1, PM2.5, PM10)
Reports internal temperature (T) and relative humidity (RH) PurpleAir Data Storage
Streamed to the PurpleAir cloud via WiFi
Public – displays on the public PurpleAir map
Private – displays only when the owner is logged in; data can be download/viewed only with owner permission
Stored locally on a microSD card (PA-II-SD model only) 4 The user supplies information at registration:
Name
Location
Indoor/Outdoor
Public/Private<br>
slide5. Step 1: Connect the PurpleAir sensor to WiFi Page 5 The PurpleAir sensor comes with an outdoor rated power. A screw or zip tie may assist with mounting.
Requirements
Available power outlet
2.4Ghz WiFi network
MicroSD card (optional) Step 1 Power
Cord PurpleAir
PA-II-SD microSD card Sensor Image Source: PurpleAir.com<br>
slide6. Power on the PurpleAir Sensor Page 6 We will setup and register the sensor while indoors near a computer/device on a WiFi network
Connect the power cord to the microUSB port at the bottom of the sensor. Connect the cord to an available power outlet. A dim red LED will be lit on the underside of the housing when the sensor is powered.
If desired, install a microSD card into the card slot directly opposite of the power port. The card will be a helpful data backup and is necessary for offline operation. Step 1 MicroUSB port MicroSD card Note: If not connected to WiFi, data will be stored on the local microSD card only. However, for this sensor loan program, all PurpleAir Sensors should be connected to WiFi and set as public unless explicitly stated otherwise by EPA staff.<br>
slide7. Find the PurpleAir Sensor’s Network Page 7 Make note of the sensor’s device ID which is noted on the sticker on the side of the sensor
On a WiFi-enabled device (computer, tablet, or smartphone), open the list of available WiFi networks
Note: This will require temporary disconnection of your device from its usual network
Connect to the sensor's network, which is likely called “PurpleAir-****” where **** is the last 2-4 characters of the device ID
Note: It may take up to up to 10 minutes after the sensor is plugged in for this network to appear Step 1<br>
slide8. Access the PurpleAir sensor’s Configuration Page Page 8 When connecting to the sensor’s network, several things may happen:
You may get a pop-up window or a message to sign-in to the network. If so, press it to make the pop-up window appear. The pop-up window will list all available WiFi networks.
If the pop-up window does not appear, try opening a web browser and loading a webpage. If you are indeed connected to the PurpleAir network, this will load the sensor interface with the WiFi settings for the sensor.
If this does not happen, open a webpage and in the address bar, enter the default IP address for the sensor: http://192.168.4.1/config Step 1<br>
slide9. Connect the PurpleAir Sensor to Your Network Page 9 In the pop-up window, click on the “Wi-Fi Settings” page to see the available networks
Select the WiFi network you want to connect the sensor to from the list
Enter the network password and then click save. Your sensor will reboot to configure the settings
Note: The last option on this list allows for the use of a hidden network Step 1<br>
slide10. Verify the WiFi Connection Page 10 Within a minute or so, the connection should be a success and the status bar will turn green and say “WiFi Connected”
If it was successful, the “PurpleAir-****” network should no longer be visible
You can start the device registration process using the link provided
Note: You will need to reconnect your device (laptop, tablet, smartphone) to its usual network Step 1<br>
slide11. Page 11 Registration – Basic Details Step 2 Enter the Device ID found on the sensor label
Enter the Associated Email supplied by the loan organization (sensor purchaser)
For our Sensor Loan Program, this is: Richardson.Joey@epa.gov OR if that does not work, try Wallace.Will@epa.gov
Choose where the sensor will be installed
Note: Only outdoor sensors will be viewable on the AirNow Fire and Smoke Map. Outdoor is the option we are using for this Sensor Loan Program unless explicitly stated otherwise by EPA staff.
Enter a Location Name which is how the sensor will be labeled on the PurpleAir map. Names should be unique
Choose whether the data should be publicly viewable or not. For this Sensor Loan Program, please set to Public.
Set the Map Location by entering GPS coordinates or by dragging the marker on the map. Please try to be as accurate as possible.<br>
slide12. Page 12 Step 2: Register the PurpleAir Sensor Step 2 Use the link provided on the sensor configuration page or navigate to www.purpleair.com/register<br>
slide13. Page 13 Registration – More Details Step 2 You can choose to share your data with other organizations (optional)
Enter the Owner's Name which may also be supplied by the loan organization:
For this program, that is Joey Richardson
Enter the Owner's Email which may also be supplied by the loan organization
Richardson.Joey@epa.gov
If desired, enter a cell phone number capable of accepting text messages (optional)
Read and agree with the terms and conditions
Click the Register button to complete the process<br>
slide14. Page 14 Registration Confirmation Step 2 Now that the sensor is registered, an email will be sent to both the “Owner’s Email” and the “Associated Email” confirming the registration and sharing a link to the map and data
Notes:
Check the spam folders for emails
Public data should now be available on the PurpleAir map
Private data can be shared using the link from within the email<br>
slide15. Page 15 Step 3 Step 3: Install the PurpleAir Sensor Now that the sensor is connected to WiFi and registered, it can be un-plugged and installed at the sampling location
Note: When powered back on, the sensor will automatically reconnect to the same WiFi network provided it is within range
The sensor must be installed vertically with the dome at the top so that the inlet and power port will be protected from water and debris accumulation.<br>
slide16. Page 16 Step 3 Outdoor Siting Determine an optimal sampling location using the Top 5 Outdoor Siting Considerations
Note:
Accomplish as many considerations as possible
Some compromises may be necessary
Test WiFi signal by surfing the internet from a mobile device connected to the same WiFi network Additional Siting Guidance: https://www.epa.gov/air-sensor-toolbox/guide-siting-and-installing-air-sensors<br>
slide17. Page 17 Step 3 Indoor Siting – Skip unless explicitly told by EPA Staff Otherwise Determine an optimal sampling location using the Top 5 Indoor Siting Considerations
Note:
Accomplish as many considerations as possible
Some compromises may be necessary
Test WiFi signal by surfing the internet from a mobile device connected to the same WiFi network Additional Siting Guidance: https://www.epa.gov/air-sensor-toolbox/guide-siting-and-installing-air-sensors<br>
slide18. Page 18 Step 3 Sensor Mounting After determining the optimal placement, secure the sensor using the metal bracket. You can use a screw through the hole or a zip tie depending on your needs
Connect the power cord to the sensor and then to a GFCI power outlet
Protects all electrical connections from water intrusion and from being covered by snow (e.g. outlet cover, weather-proof power cord connection box)
Tuck the cord away to ensure it does not become a tripping hazard
Use a "drip loop" to prevent water from running down the power cord and into the outlet Drip Loop<br>
slide19. Page 19 Step 3 Documenting the Installation Photos of the sensor deployment may assist you with data interpretation later and should include features that may impact the sensor readings
Outdoors: buildings, roadways, landscapes, typical use of the space
Indoors: windows, doors, exhaust vents, typical use of the room Additional notes can be helpful too, such as:
The location, height, and date of installation
Any temporary activities (e.g., road work, construction activities, cleaning, cooking) that may have been occuring during installation<br>
slide20. Step 4: View Data and Verify Operation Page 20 Verify that your sensor is WiFi connected and operating properly by viewing the public data on the PurpleAir map. Visit https://www.purpleair.com/map. This is the only time you’ll need to check the PurpleAir Map. Step 4 Image source: PurpleAir.com/map<br>
slide21. Public Data on the AirNow Fire and Smoke Map Page 21 Within about 48 hours, publicly reporting sensors will be viewable on the AirNow Fire and Smoke Map. Visit https://fire.airnow.gov/.
This is the map to reference from here forward. Step 4 Opens In Your Area
sidebar Refreshes
data Search location Data layer controls Help
user guide
Frequently Asked Questions (FAQ)
feedback
legend Zoom<br>
slide22. Troubleshooting Tips – Setup and Registration Page 22 Setup may be easiest when the WiFi connection is configured while the sensor is indoors, near your computer, where you have a good WiFi signal
Rarely, the sensor ID on the sensor may be incorrect. The correct ID can be found within the data file on the SD card.
Registration requires the email address associated with the sensor purchase. If this is unknown, contact the loan organization for further instructions
To change the registration information
If making minor changes, you can simply repeat the registration process with the current/updated information and the original information will be replaced
If you plan to move the sensor to another location, contact PurpleAir so that the data from the old location can be archived so that the data stays at the original location. You will then be able to re-register it in the new location as a new sensor<br>
slide23. Troubleshooting Tips – WiFi Configuration Page 23 Network Type
PurpleAir sensors only support 2.4Ghz WiFi networks
Connecting to a captive portal networks, such as those used by coffee shops, universities, etc. will need special authorization from the network administrator
WPA2-Enterprise network connections are not supported at this time
WPA and WPA2-PSK (Pre-Shared Key) networks are supported
Testing Network Strength
To ensure you have a reasonable WiFi signal where you intend to mount the sensor, try browsing the internet using WiFi with a phone or computer near the intended location<br>
slide24. Troubleshooting Tips – Sensor Missing From the PurpleAir Map Page 24 Sensor marker is not appearing on the PurpleAir map
Make sure the sensor has power. Perform a power cycle (unplug, wait 10 sec, plug-in)
Make sure the sensor has a WiFi connection. Try re-configuring the connection
Ensure the registration form has been filled out. Try completing the registration form again
Note: If the marker has disappeared from the map, it is possible that your sensor may have become inactive for an extended amount of time
Sensor marker is grey on the PurpleAir map
Note: This generally means the sensor has recently become inactive
Perform the troubleshooting steps outlined above
Ensure you have completed the registration form. Look for the coordinates you entered in the registration confirmation email to be sure they are accurate<br>
slide25. Troubleshooting Tips – Sensor Missing From the AirNow Fire and Smoke Map Page 25 Sensor marker is not appearing on the AirNow Fire and Smoke map
Note: It may take up to 48 hours for a new sensor to show up on the Fire and Smoke Map
Ensure the sensor has power, is connected to WiFi, and that the sensor is reporting data to the PurpleAir map
Check the registration to be sure the sensor is marked as “outdoor”
Click on the sensor on the PurpleAir map to view a time series of data from channels A and B. Sensors may be failing quality control checks if
Sensors don’t have sufficient data completeness because of intermittently reporting data
Data reported by the A and B channels do not match well
Click on another nearby sensor on the PurpleAir map to add that data to the time series graph
If the trends of the two sensors do not match well, the sensor may have been flagged by EPA or the local air quality agency as suspect or impacted by a local pollution source (This is rare)<br>
slide26. Troubleshooting Tips – PurpleAir Support Page 26 PurpleAir has an extensive list of Frequently Asked Questions (FAQs) available on their website: https://www2.purpleair.com/community/faq
There is an active community of PurpleAir users who communicate on a Facebook Users Group Page: https://www.facebook.com/groups/purpleair/
You may contact PurpleAir directly
https://www2.purpleair.com/pages/contact-us
contact@purpleair.com<br>
slide2. Quick Start Guide Overview Page 2 General Safety Precautions and Tips
General Information about the PurpleAir Sensor
Step 1: Connect the PurpleAir Sensor to WiFi
Step 2: Register the PurpleAir Sensor
Step 3: Install the PurpleAir Sensor
Step 4: View Maps and Verify Sensor Operation
Troubleshooting Tips
Additional Information and Resources<br>
slide3. Safety Precautions and Tips Page 3 Minors should be supervised by a guardian when accessing the internet to register the sensor Be sure descriptive PurpleAir sensor names and location are appropriate!
If public, it will be online and visible to the entire PurpleAir community Use caution if climbing ladders or stepstools to install the sensors.
Take care to avoid tripping on the power cord Do not cover the sensor air inlet or exit The PurpleAir sensor is water resistant, not waterproof – make sure to mount the sensor with the cap up and high enough so that water cannot splash up and into the sensor Loop the power cord to create a drip loop to prevent water from running down the cord and into the power outlet Additional Important Notes:
The PurpleAir only measures particulate matter – it does not measure gaseous pollutants.
The PurpleAir does not measure airborne viruses like the flu or COVID-19.<br>
slide4. About PurpleAir PurpleAir Data Hardware
2 Plantower PMS5003 PM sensor (channels A & B)
BME280 pressure, temperature, humidity sensor
Sample for alternating 10-second intervals
Generate 2-minute averages
PurpleAir Data Outputs
Reports estimated particulate matter concentrations (PM1, PM2.5, PM10)
Reports internal temperature (T) and relative humidity (RH) PurpleAir Data Storage
Streamed to the PurpleAir cloud via WiFi
Public – displays on the public PurpleAir map
Private – displays only when the owner is logged in; data can be download/viewed only with owner permission
Stored locally on a microSD card (PA-II-SD model only) 4 The user supplies information at registration:
Name
Location
Indoor/Outdoor
Public/Private<br>
slide5. Step 1: Connect the PurpleAir sensor to WiFi Page 5 The PurpleAir sensor comes with an outdoor rated power. A screw or zip tie may assist with mounting.
Requirements
Available power outlet
2.4Ghz WiFi network
MicroSD card (optional) Step 1 Power
Cord PurpleAir
PA-II-SD microSD card Sensor Image Source: PurpleAir.com<br>
slide6. Power on the PurpleAir Sensor Page 6 We will setup and register the sensor while indoors near a computer/device on a WiFi network
Connect the power cord to the microUSB port at the bottom of the sensor. Connect the cord to an available power outlet. A dim red LED will be lit on the underside of the housing when the sensor is powered.
If desired, install a microSD card into the card slot directly opposite of the power port. The card will be a helpful data backup and is necessary for offline operation. Step 1 MicroUSB port MicroSD card Note: If not connected to WiFi, data will be stored on the local microSD card only. However, for this sensor loan program, all PurpleAir Sensors should be connected to WiFi and set as public unless explicitly stated otherwise by EPA staff.<br>
slide7. Find the PurpleAir Sensor’s Network Page 7 Make note of the sensor’s device ID which is noted on the sticker on the side of the sensor
On a WiFi-enabled device (computer, tablet, or smartphone), open the list of available WiFi networks
Note: This will require temporary disconnection of your device from its usual network
Connect to the sensor's network, which is likely called “PurpleAir-****” where **** is the last 2-4 characters of the device ID
Note: It may take up to up to 10 minutes after the sensor is plugged in for this network to appear Step 1<br>
slide8. Access the PurpleAir sensor’s Configuration Page Page 8 When connecting to the sensor’s network, several things may happen:
You may get a pop-up window or a message to sign-in to the network. If so, press it to make the pop-up window appear. The pop-up window will list all available WiFi networks.
If the pop-up window does not appear, try opening a web browser and loading a webpage. If you are indeed connected to the PurpleAir network, this will load the sensor interface with the WiFi settings for the sensor.
If this does not happen, open a webpage and in the address bar, enter the default IP address for the sensor: http://192.168.4.1/config Step 1<br>
slide9. Connect the PurpleAir Sensor to Your Network Page 9 In the pop-up window, click on the “Wi-Fi Settings” page to see the available networks
Select the WiFi network you want to connect the sensor to from the list
Enter the network password and then click save. Your sensor will reboot to configure the settings
Note: The last option on this list allows for the use of a hidden network Step 1<br>
slide10. Verify the WiFi Connection Page 10 Within a minute or so, the connection should be a success and the status bar will turn green and say “WiFi Connected”
If it was successful, the “PurpleAir-****” network should no longer be visible
You can start the device registration process using the link provided
Note: You will need to reconnect your device (laptop, tablet, smartphone) to its usual network Step 1<br>
slide11. Page 11 Registration – Basic Details Step 2 Enter the Device ID found on the sensor label
Enter the Associated Email supplied by the loan organization (sensor purchaser)
For our Sensor Loan Program, this is: Richardson.Joey@epa.gov OR if that does not work, try Wallace.Will@epa.gov
Choose where the sensor will be installed
Note: Only outdoor sensors will be viewable on the AirNow Fire and Smoke Map. Outdoor is the option we are using for this Sensor Loan Program unless explicitly stated otherwise by EPA staff.
Enter a Location Name which is how the sensor will be labeled on the PurpleAir map. Names should be unique
Choose whether the data should be publicly viewable or not. For this Sensor Loan Program, please set to Public.
Set the Map Location by entering GPS coordinates or by dragging the marker on the map. Please try to be as accurate as possible.<br>
slide12. Page 12 Step 2: Register the PurpleAir Sensor Step 2 Use the link provided on the sensor configuration page or navigate to www.purpleair.com/register<br>
slide13. Page 13 Registration – More Details Step 2 You can choose to share your data with other organizations (optional)
Enter the Owner's Name which may also be supplied by the loan organization:
For this program, that is Joey Richardson
Enter the Owner's Email which may also be supplied by the loan organization
Richardson.Joey@epa.gov
If desired, enter a cell phone number capable of accepting text messages (optional)
Read and agree with the terms and conditions
Click the Register button to complete the process<br>
slide14. Page 14 Registration Confirmation Step 2 Now that the sensor is registered, an email will be sent to both the “Owner’s Email” and the “Associated Email” confirming the registration and sharing a link to the map and data
Notes:
Check the spam folders for emails
Public data should now be available on the PurpleAir map
Private data can be shared using the link from within the email<br>
slide15. Page 15 Step 3 Step 3: Install the PurpleAir Sensor Now that the sensor is connected to WiFi and registered, it can be un-plugged and installed at the sampling location
Note: When powered back on, the sensor will automatically reconnect to the same WiFi network provided it is within range
The sensor must be installed vertically with the dome at the top so that the inlet and power port will be protected from water and debris accumulation.<br>
slide16. Page 16 Step 3 Outdoor Siting Determine an optimal sampling location using the Top 5 Outdoor Siting Considerations
Note:
Accomplish as many considerations as possible
Some compromises may be necessary
Test WiFi signal by surfing the internet from a mobile device connected to the same WiFi network Additional Siting Guidance: https://www.epa.gov/air-sensor-toolbox/guide-siting-and-installing-air-sensors<br>
slide17. Page 17 Step 3 Indoor Siting – Skip unless explicitly told by EPA Staff Otherwise Determine an optimal sampling location using the Top 5 Indoor Siting Considerations
Note:
Accomplish as many considerations as possible
Some compromises may be necessary
Test WiFi signal by surfing the internet from a mobile device connected to the same WiFi network Additional Siting Guidance: https://www.epa.gov/air-sensor-toolbox/guide-siting-and-installing-air-sensors<br>
slide18. Page 18 Step 3 Sensor Mounting After determining the optimal placement, secure the sensor using the metal bracket. You can use a screw through the hole or a zip tie depending on your needs
Connect the power cord to the sensor and then to a GFCI power outlet
Protects all electrical connections from water intrusion and from being covered by snow (e.g. outlet cover, weather-proof power cord connection box)
Tuck the cord away to ensure it does not become a tripping hazard
Use a "drip loop" to prevent water from running down the power cord and into the outlet Drip Loop<br>
slide19. Page 19 Step 3 Documenting the Installation Photos of the sensor deployment may assist you with data interpretation later and should include features that may impact the sensor readings
Outdoors: buildings, roadways, landscapes, typical use of the space
Indoors: windows, doors, exhaust vents, typical use of the room Additional notes can be helpful too, such as:
The location, height, and date of installation
Any temporary activities (e.g., road work, construction activities, cleaning, cooking) that may have been occuring during installation<br>
slide20. Step 4: View Data and Verify Operation Page 20 Verify that your sensor is WiFi connected and operating properly by viewing the public data on the PurpleAir map. Visit https://www.purpleair.com/map. This is the only time you’ll need to check the PurpleAir Map. Step 4 Image source: PurpleAir.com/map<br>
slide21. Public Data on the AirNow Fire and Smoke Map Page 21 Within about 48 hours, publicly reporting sensors will be viewable on the AirNow Fire and Smoke Map. Visit https://fire.airnow.gov/.
This is the map to reference from here forward. Step 4 Opens In Your Area
sidebar Refreshes
data Search location Data layer controls Help
user guide
Frequently Asked Questions (FAQ)
feedback
legend Zoom<br>
slide22. Troubleshooting Tips – Setup and Registration Page 22 Setup may be easiest when the WiFi connection is configured while the sensor is indoors, near your computer, where you have a good WiFi signal
Rarely, the sensor ID on the sensor may be incorrect. The correct ID can be found within the data file on the SD card.
Registration requires the email address associated with the sensor purchase. If this is unknown, contact the loan organization for further instructions
To change the registration information
If making minor changes, you can simply repeat the registration process with the current/updated information and the original information will be replaced
If you plan to move the sensor to another location, contact PurpleAir so that the data from the old location can be archived so that the data stays at the original location. You will then be able to re-register it in the new location as a new sensor<br>
slide23. Troubleshooting Tips – WiFi Configuration Page 23 Network Type
PurpleAir sensors only support 2.4Ghz WiFi networks
Connecting to a captive portal networks, such as those used by coffee shops, universities, etc. will need special authorization from the network administrator
WPA2-Enterprise network connections are not supported at this time
WPA and WPA2-PSK (Pre-Shared Key) networks are supported
Testing Network Strength
To ensure you have a reasonable WiFi signal where you intend to mount the sensor, try browsing the internet using WiFi with a phone or computer near the intended location<br>
slide24. Troubleshooting Tips – Sensor Missing From the PurpleAir Map Page 24 Sensor marker is not appearing on the PurpleAir map
Make sure the sensor has power. Perform a power cycle (unplug, wait 10 sec, plug-in)
Make sure the sensor has a WiFi connection. Try re-configuring the connection
Ensure the registration form has been filled out. Try completing the registration form again
Note: If the marker has disappeared from the map, it is possible that your sensor may have become inactive for an extended amount of time
Sensor marker is grey on the PurpleAir map
Note: This generally means the sensor has recently become inactive
Perform the troubleshooting steps outlined above
Ensure you have completed the registration form. Look for the coordinates you entered in the registration confirmation email to be sure they are accurate<br>
slide25. Troubleshooting Tips – Sensor Missing From the AirNow Fire and Smoke Map Page 25 Sensor marker is not appearing on the AirNow Fire and Smoke map
Note: It may take up to 48 hours for a new sensor to show up on the Fire and Smoke Map
Ensure the sensor has power, is connected to WiFi, and that the sensor is reporting data to the PurpleAir map
Check the registration to be sure the sensor is marked as “outdoor”
Click on the sensor on the PurpleAir map to view a time series of data from channels A and B. Sensors may be failing quality control checks if
Sensors don’t have sufficient data completeness because of intermittently reporting data
Data reported by the A and B channels do not match well
Click on another nearby sensor on the PurpleAir map to add that data to the time series graph
If the trends of the two sensors do not match well, the sensor may have been flagged by EPA or the local air quality agency as suspect or impacted by a local pollution source (This is rare)<br>
slide26. Troubleshooting Tips – PurpleAir Support Page 26 PurpleAir has an extensive list of Frequently Asked Questions (FAQs) available on their website: https://www2.purpleair.com/community/faq
There is an active community of PurpleAir users who communicate on a Facebook Users Group Page: https://www.facebook.com/groups/purpleair/
You may contact PurpleAir directly
https://www2.purpleair.com/pages/contact-us
contact@purpleair.com<br>