# Data Layers **URL:** https://community.purpleair.com/c/real-time-map/data-layers/16.md [Latest](https://community.purpleair.com/latest.md) · [Categories](https://community.purpleair.com/categories.md) --- ## [Map Data Layers](https://community.purpleair.com/t/map-data-layers/144)
**Author:** [@Adrian](https://community.purpleair.com/u/Adrian)\ **Replies:** 0
PurpleAir tracks a range of parameters from it’s sensors, including PM1.0, PM2.5, PM10, temperature, humidity, pressure and more. It is possible top convert these values to other parameters, like visibility or dew point.… --- ## [The Ozone Data Layer on the PurpleAir Map](https://community.purpleair.com/t/the-ozone-data-layer-on-the-purpleair-map/973)
**Author:** [@PurpleAir](https://community.purpleair.com/u/PurpleAir)\ **Replies:** 12\ **Last updated:** [July 4, 2025, 2:27pm UTC](https://community.purpleair.com/t/the-ozone-data-layer-on-the-purpleair-map/973 "2025-07-04T14:27:05Z")
In 2018, PurpleAir worked on a project alongside Citizens of Clean Air (CCA) to create what they call “tri-sensors” - sensors that measure particulate matter, volatile organic compounds, and ozone. This project took plac… --- ## [Data mismatch between API fetch and Real Time Map CSV](https://community.purpleair.com/t/data-mismatch-between-api-fetch-and-real-time-map-csv/12635)
**Author:** [@Tiago\_Oliveira](https://community.purpleair.com/u/Tiago_Oliveira)\ **Replies:** 1\ **Last updated:** [June 9, 2025, 8:53pm UTC](https://community.purpleair.com/t/data-mismatch-between-api-fetch-and-real-time-map-csv/12635 "2025-06-09T20:53:14Z")
Greatings, I’m fetching history data from the sensor 223683 using the following params: AVERAGE\_10\_MIN = 10 START\_10\_MIN = 1731189600 # 2024-11-09 22:00:00 UTC END\_10\_MIN = 1731204000 # 2024-11-10 02:00:00 UTC param… --- ## [Why is PM10 obsolete?](https://community.purpleair.com/t/why-is-pm10-obsolete/11347)
**Author:** [@jheiler](https://community.purpleair.com/u/jheiler)\ **Replies:** 2\ **Last updated:** [January 25, 2025, 2:04pm UTC](https://community.purpleair.com/t/why-is-pm10-obsolete/11347 "2025-01-25T14:04:56Z")
Why is the value for PM10 marked as obsolete in the map? In the European Union, air quality monitoring is based on this value, among others. Kind regards --- ## [Updated USEPA NAAQS for PM2.5](https://community.purpleair.com/t/updated-usepa-naaqs-for-pm2-5/8148)
**Author:** [@aea1993](https://community.purpleair.com/u/aea1993)\ **Replies:** 10\ **Last updated:** [January 2, 2025, 5:57pm UTC](https://community.purpleair.com/t/updated-usepa-naaqs-for-pm2-5/8148 "2025-01-02T17:57:46Z")
Hey y’all! In light of the new PM2.5 NAAQS that was recently finalized by the USEPA, is there going to be any update to how the PM2.5 AQI is calculated? I have a basic understanding of how AQI is calculated, and I know … --- ## [Visibility Data Layers](https://community.purpleair.com/t/visibility-data-layers/154)
**Author:** [@PurpleAir](https://community.purpleair.com/u/PurpleAir)\ **Replies:** 0\ **Last updated:** [October 27, 2021, 7:37pm UTC](https://community.purpleair.com/t/visibility-data-layers/154 "2021-10-27T19:37:05Z")
The “Data Layer“ field determines which indices, scales, or metadata to display on the Map Markers, graphs, and the map legend. The default field-selection is “US EPA PM2.5 AQI“. Visibility Layers This next partition o… --- ## [Does PurpleAir Remove Sensors From The Map?](https://community.purpleair.com/t/does-purpleair-remove-sensors-from-the-map/6822)
**Author:** [@PurpleAir](https://community.purpleair.com/u/PurpleAir)\ **Replies:** 0\ **Last updated:** [October 16, 2023, 6:00am UTC](https://community.purpleair.com/t/does-purpleair-remove-sensors-from-the-map/6822 "2023-10-16T06:00:00Z")
The below information talks about sensors that have gone offline. When you buy a new sensor because your old one has failed, the older sensor’s dot will still be on the map. This is because it is now an offline sensor. … --- ## [Air Quality Index Layers](https://community.purpleair.com/t/air-quality-index-layers/153)
**Author:** [@PurpleAir](https://community.purpleair.com/u/PurpleAir)\ **Replies:** 0\ **Last updated:** [October 27, 2021, 7:30pm UTC](https://community.purpleair.com/t/air-quality-index-layers/153 "2021-10-27T19:30:40Z")
The “Data Layer“ field determines which indices, scales, or metadata to display on the Map Markers, graphs, and the map legend. The default field-selection is “US EPA PM2.5 AQI“. AQI Layers This first partition of data… --- ## [Sensor Metadata Layers](https://community.purpleair.com/t/sensor-metadata-layers/157)
**Author:** [@PurpleAir](https://community.purpleair.com/u/PurpleAir)\ **Replies:** 0\ **Last updated:** [October 27, 2021, 7:53pm UTC](https://community.purpleair.com/t/sensor-metadata-layers/157 "2021-10-27T19:53:54Z")
The “Data Layer“ field determines which indices, scales, or metadata to display on the Map Markers, graphs, and the map legend. The default field-selection is “US EPA PM2.5 AQI“. Metadata Layers This last partition of … --- ## [Raw Sensor Data Layers](https://community.purpleair.com/t/raw-sensor-data-layers/156)
**Author:** [@PurpleAir](https://community.purpleair.com/u/PurpleAir)\ **Replies:** 0\ **Last updated:** [October 27, 2021, 7:51pm UTC](https://community.purpleair.com/t/raw-sensor-data-layers/156 "2021-10-27T19:51:07Z")
The “Data Layer“ field determines which indices, scales, or metadata to display on the Map Markers, graphs, and the map legend. The default field-selection is “US EPA PM2.5 AQI“. Raw Data Layers This next partition of … --- ## [Environmental Data Layers](https://community.purpleair.com/t/environmental-data-layers/155)
**Author:** [@PurpleAir](https://community.purpleair.com/u/PurpleAir)\ **Replies:** 0\ **Last updated:** [October 27, 2021, 7:47pm UTC](https://community.purpleair.com/t/environmental-data-layers/155 "2021-10-27T19:47:07Z")
The “Data Layer“ field determines which indices, scales, or metadata to display on the Map Markers, graphs, and the map legend. The default field selection is “US EPA PM2.5 AQI“. Environmental Layers This partition of … --- ## [Map Settings](https://community.purpleair.com/t/map-settings/3538)
**Author:** [@e.botter](https://community.purpleair.com/u/e.botter)\ **Replies:** 1\ **Last updated:** [August 14, 2023, 9:09pm UTC](https://community.purpleair.com/t/map-settings/3538 "2023-08-14T21:09:51Z")
Please let me know what should be checked on the map to have the best reading of the air quality. Thank you! --- ## [Is \> correct for particle sizes](https://community.purpleair.com/t/is-correct-for-particle-sizes/5164)
**Author:** [@wring](https://community.purpleair.com/u/wring)\ **Replies:** 1\ **Last updated:** [June 27, 2023, 10:22pm UTC](https://community.purpleair.com/t/is-correct-for-particle-sizes/5164 "2023-06-27T22:22:01Z")
In map settings when choosing what size pm in raw measurements, the signs are “greater than” ie particles \>2.5 but I am used to pm2.5 referring to all the particles 2.5u and smaller. As you go down in size, the parti… --- ## [Which AQI Data Layer to Choose](https://community.purpleair.com/t/which-aqi-data-layer-to-choose/5202)
**Author:** [@PurpleAir](https://community.purpleair.com/u/PurpleAir)\ **Replies:** 0\ **Last updated:** [June 27, 2023, 8:13pm UTC](https://community.purpleair.com/t/which-aqi-data-layer-to-choose/5202 "2023-06-27T20:13:00Z")
With so many data layers on the PurpleAir Map, it can be difficult to determine which one to choose. There are many air quality indexes (AQI) created by different national governments such as the USA, Canada, Australia,… --- ## [What does "No" mean?](https://community.purpleair.com/t/what-does-no-mean/746)
**Author:** [@Lance](https://community.purpleair.com/u/Lance)\ **Replies:** 0\ **Last updated:** [May 29, 2022, 6:20pm UTC](https://community.purpleair.com/t/what-does-no-mean/746 "2022-05-29T18:20:55Z")
On the PurpleAir map page, after clicking on a site, the upper left of the map opens up to show the graph of that site over the past few days. Clicking on the top of the graph gets you to a drop-down menu. The second li… --- ## [Indoor sensor map data is incorrect due to use of CF=1 sensor values](https://community.purpleair.com/t/indoor-sensor-map-data-is-incorrect-due-to-use-of-cf-1-sensor-values/3021)
**Author:** [@balazer](https://community.purpleair.com/u/balazer)\ **Replies:** 2\ **Last updated:** [December 24, 2022, 2:43pm UTC](https://community.purpleair.com/t/indoor-sensor-map-data-is-incorrect-due-to-use-of-cf-1-sensor-values/3021 "2022-12-24T14:43:00Z")
I believe the PurpleAir map is using the wrong type of particulate matter concentration values from the Plantower modules in its indoor sensors, and consequently the particulate matter and air quality index numbers shown… --- ## [Averaging Period not available anymore for \<2.5 μm](https://community.purpleair.com/t/averaging-period-not-available-anymore-for-2-5-m/1298)
**Author:** [@Raman](https://community.purpleair.com/u/Raman)\ **Replies:** 2\ **Last updated:** [October 5, 2022, 6:07am UTC](https://community.purpleair.com/t/averaging-period-not-available-anymore-for-2-5-m/1298 "2022-10-05T06:07:44Z")
Hi, I noticed that the averaging period dropdown is no longer available for many of the Data Layers, including the layers for particle sizes under 2.5 μm. Is this a permanent change? I found the 1 day average values fo… --- ## [Consider adding Heat Index to data layer, please!](https://community.purpleair.com/t/consider-adding-heat-index-to-data-layer-please/1395)
**Author:** [@michaelheggen](https://community.purpleair.com/u/michaelheggen)\ **Replies:** 0\ **Last updated:** [July 27, 2022, 2:18am UTC](https://community.purpleair.com/t/consider-adding-heat-index-to-data-layer-please/1395 "2022-07-27T02:18:53Z")
In the wake of last year’s deadly heat dome, Oregon OSHA recently adopted the strictest workplace heat illness prevention rules in the U.S. The primary metric for implementing these rules is the Heat Index. PurpleAir’s …