diff --git a/README.md b/README.md
index 9360a4b..d3804f8 100644
--- a/README.md
+++ b/README.md
@@ -116,4 +116,4 @@ $ python -m pytest tests/
 
 Changes for the air-pollutant-map (tab Hajapäästöt in the application) are made in the directory [air-pollutant-map](air-pollutant-map). Air-pollutant-map is originally implemented with Vue, therefore it's code is maintained separately from UI. Build of air-pollutant-map is placed inside the public-directory of UI so that the build runs on the same server as the main app. Running air-pollutant-map is embedded in to the UI with an iframe.
 
-Whenever new changes are made to the air-pollutant-map, new build needs to be made and copied in [ui/public/air-pollutant-map](ui/public/air-pollutant-map). More information about updating the changes in the other [README.md](air-pollutant-map/README.md)
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+Whenever new changes are made to the air-pollutant-map, new build needs to be made and copied in [ui/public/air-pollutant-map](ui/public/air-pollutant-map). Dev-environment of air-pollutant-map can be used in local testing, but prod-environment needs to be used when changes are published. More information about updating the changes in the other [README.md](air-pollutant-map/README.md)
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diff --git a/air-pollutant-map/README.md b/air-pollutant-map/README.md
index c5adcd6..20c6f91 100644
--- a/air-pollutant-map/README.md
+++ b/air-pollutant-map/README.md
@@ -41,7 +41,7 @@ Vue.js & OpenLayers
 See [Configuration Reference](https://cli.vuejs.org/config/).
 
 ## Update air-pollutant-map changes to PRTR ui
-To update changes that are made in air-pollutant-map to PRTR app, minified build needs to be copied in directory [ui/public/air-pollutant-map](../ui/public/air-pollutant-map/). Build script and copy script are chained for sequential execution. Copy-script requires installation of ncp. To install, run:
+To update changes that are made in air-pollutant-map to PRTR app, minified build needs to be copied in directory [ui/public/air-pollutant-map](../ui/public/air-pollutant-map/). Dev-build can be used in local testing. Prod-build needs to be used when changes are published. Build script and copy script are chained for sequential execution. Copy-script requires installation of ncp. To install, run:
 ```
 npm install -g ncp
 ```